Merge pull request #7 from Unity-Technologies/siyao

transform matrix3 to matrix4

Samples/UIWidgetsSamples_2019_4/Assets/Editor/Widgets.cs

             var mediaQueryData = MediaQuery.of(context);
             var px = mediaQueryData.size.width / 2;
             var py = mediaQueryData.size.width / 2;
-
-                        transform: Matrix3.makeRotate(Mathf.PI / 180 * 5, px, py),
+                        transform: new Matrix4().rotationZ(Mathf.PI / 180 * 5, px, py),
                         child:
                         new Column(
                             children: new List<Widget> {

Samples/UIWidgetsSamples_2019_4/Assets/UIWidgetsGallery/demo/animation/widgets.cs

         );
 
         public override Widget build(BuildContext context) {
+            var scale = this.scale ?? 1.0f;
-                        transform: Matrix3.makeScale(this.scale ?? 1.0f),
+                        transform: new Matrix4().diagonal3Values(scale, scale, scale),
                         alignment: Alignment.center,
                         child: new Stack(
                             children: new List<Widget> {

com.unity.uiwidgets/Runtime/cupertino/text_selection.cs

 
             switch (type) {
                 case TextSelectionHandleType.left:
-                    Matrix3 matrix = Matrix3.makeRotate(Mathf.PI);
-                    matrix.preTranslate(-CupertinoTextSelectionUtils._kHandlesPadding,
+                    Matrix4 matrix = new Matrix4().rotationZ(Mathf.PI);
+                    matrix.translate(-CupertinoTextSelectionUtils._kHandlesPadding,
                         -CupertinoTextSelectionUtils._kHandlesPadding);
 
                     return new Transform(
                 case TextSelectionHandleType.right:
                     return new Transform(
-                        transform: Matrix3.makeTrans(
+                        transform:new Matrix4().translationValues(
-                            -(textLineHeight + CupertinoTextSelectionUtils._kHandlesPadding)
+                            -(textLineHeight + CupertinoTextSelectionUtils._kHandlesPadding), 
+                            0
                         ),
                         child: handle
                     );

com.unity.uiwidgets/Runtime/material/bottom_navigation_bar.cs

                     color: this.colorTween.evaluate(this.animation)
                 ),
                 child: new Transform(
-                    transform: Matrix3.makeAll(t, 0, 0,
-                                               0, t, 0,
-                                               0, 0, 1),
+                    transform: new Matrix4().diagonal3Values(t, t, t),
                     alignment: Alignment.bottomCenter,
                     child: this.item.title
                 )

com.unity.uiwidgets/Runtime/material/flexible_space_bar.cs

                         bottom: 16.0f
                     );
                 float scaleValue = new FloatTween(begin: 1.5f, end: 1.0f).lerp(t);
-                Matrix3 scaleTransform = Matrix3.makeScale(scaleValue, scaleValue);
+                Matrix4 scaleTransform = new Matrix4().diagonal3Values(scaleValue, scaleValue, 1);
                 Alignment titleAlignment = this._getTitleAlignment(effectiveCenterTitle);
 
                 children.Add(new Container(

com.unity.uiwidgets/Runtime/material/ink_decoration.cs

             base.dispose();
         }
 
-        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+        protected override void paintFeature(Canvas canvas, Matrix4 transform) {
             if (this._painter == null) {
                 return;
             }
 
             if (originOffset == null) {
                 canvas.save();
-                canvas.concat(transform);
+                canvas.concat(transform.toMatrix3());
                 this._painter.paint(canvas, Offset.zero, sizedConfiguration);
                 canvas.restore();
             }

com.unity.uiwidgets/Runtime/material/ink_highlight.cs

             canvas.restore();
         }
 
-        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+        protected override void paintFeature(Canvas canvas, Matrix4 transform) {
-                canvas.concat(transform);
+                canvas.concat(transform.toMatrix3());
                 this._paintHighlight(canvas, rect, paint);
                 canvas.restore();
             }

com.unity.uiwidgets/Runtime/material/ink_ripple.cs

             base.dispose();
         }
 
-        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+        protected override void paintFeature(Canvas canvas, Matrix4 transform) {
             int alpha = this._fadeInController.isAnimating ? this._fadeIn.value : this._fadeOut.value;
             Paint paint = new Paint {color = this.color.withAlpha(alpha)};
             Offset center = Offset.lerp(
             Offset originOffset = transform.getAsTranslation();
             canvas.save();
             if (originOffset == null) {
-                canvas.concat(transform);
+                canvas.concat(transform.toMatrix3());
             }
             else {
                 canvas.translate(originOffset.dx, originOffset.dy);

com.unity.uiwidgets/Runtime/material/ink_splash.cs

             base.dispose();
         }
 
-        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+        protected override void paintFeature(Canvas canvas, Matrix4 transform) {
             Paint paint = new Paint {color = this.color.withAlpha(this._alpha.value)};
             Offset center = this._position;
             if (this._repositionToReferenceBox) {
             Offset originOffset = transform.getAsTranslation();
             canvas.save();
             if (originOffset == null) {
-                canvas.concat(transform);
+                canvas.concat(transform.toMatrix3());
             }
             else {
                 canvas.translate(originOffset.dx, originOffset.dy);

com.unity.uiwidgets/Runtime/material/input_decorator.cs

 
         protected internal override Widget build(BuildContext context) {
             return new Transform(
-                transform: Matrix3.makeTrans(this.translateX, 0.0f),
+                transform: new Matrix4().translationValues(this.translateX, 0, 0),
                 child: this.child
             );
         }
             return _boxParentData(this.input).offset.dy + this.input.getDistanceToActualBaseline(baseline);
         }
 
-        Matrix3 _labelTransform;
+        Matrix4 _labelTransform;
 
         protected override void performLayout() {
             this._labelTransform = null;
                 float scale = MathUtils.lerpFloat(1.0f, 0.75f, t);
                 float dx = labelOffset.dx;
                 float dy = MathUtils.lerpFloat(0.0f, floatingY - labelOffset.dy, t);
-                this._labelTransform = Matrix3.I();
-                this._labelTransform.preTranslate(dx, labelOffset.dy + dy);
-                this._labelTransform.preScale(scale, scale);
+                this._labelTransform = new Matrix4().identity();
+                this._labelTransform.translate(dx, labelOffset.dy + dy);
+                this._labelTransform.scale(scale, scale, 1);
                 context.pushTransform(this.needsCompositing, offset, this._labelTransform, this._paintLabel);
             }
 
             return false;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
-                transform.preConcat(this._labelTransform);
-                transform.preTranslate(-labelOffset.dx, -labelOffset.dy);
+                transform.multiply(this._labelTransform);
+                transform.translate(-labelOffset.dx, -labelOffset.dy);
             }
 
             base.applyPaintTransform(child, transform);

com.unity.uiwidgets/Runtime/material/material.cs

                 descendants.Add(node);
             }
 
-            Matrix3 transform = Matrix3.I();
+            Matrix4 transform = new Matrix4().identity();
             D.assert(descendants.Count >= 2);
             for (int index = descendants.Count - 1; index > 0; index -= 1) {
                 descendants[index].applyPaintTransform(descendants[index - 1], transform);
         }
 
-        protected abstract void paintFeature(Canvas canvas, Matrix3 transform);
+        protected abstract void paintFeature(Canvas canvas, Matrix4 transform);
 
         public override string ToString() {
             return this.GetType() + "";

com.unity.uiwidgets/Runtime/material/text_selection.cs

             switch (type) {
                 case TextSelectionHandleType.left: // points up-right
                     return new Transform(
-                        transform: Matrix3.makeRotate(Mathf.PI / 2),
+                        transform: new Matrix4().rotationZ(Mathf.PI / 2),
                         child: handle
                     );
                 case TextSelectionHandleType.right: // points up-left
-                        transform: Matrix3.makeRotate(Mathf.PI / 4),
+                        transform: new Matrix4().rotationZ(Mathf.PI / 4),
                         child: handle
                     );
             }

com.unity.uiwidgets/Runtime/painting/matrix_utils.cs

 
 namespace Unity.UIWidgets.painting {
     public static class MatrixUtils {
-        public static Offset getAsTranslation(this Matrix3 matrix3) {
-            return matrix3.isTranslate() ? new Offset(matrix3[Matrix3.kMTransX], matrix3[Matrix3.kMTransY]) : null;
+        public static float dot(this Vector3 left, Vector3 right) {
+            return left.x * right.x + left.y * right.y + left.z * right.z;
+        }
+        
+        public static Offset getAsTranslation(this Matrix4 values) {
+            if (values[0] == 1 && // col 1
+                values[1] == 0 &&
+                values[2] == 0 &&
+                values[3] == 0 &&
+                values[4] == 0 && // col 2
+                values[5] == 1 &&
+                values[6] == 0 &&
+                values[7] == 0 &&
+                values[8] == 0 && // col 3
+                values[9] == 0 &&
+                values[10] == 1 &&
+                values[11] == 0 &&
+                values[14] == 0 && // bottom of col 4 (values 12 and 13 are the x and y offsets)
+                values[15] == 1) {
+                return new Offset(values[12], values[13]);
+            }
+            else {
+                return null;
+            }
+        }
+        
+        public static void QuaternionFromMatrix(this Matrix4 m, ref Quaternion q) {
+            q.w = Mathf.Sqrt( Mathf.Max( 0, 1 + m.entry(0,0) + m.entry(1,1) + m.entry(2,2) ) ) / 2; 
+            q.x = Mathf.Sqrt( Mathf.Max( 0, 1 + m.entry(0,0) - m.entry(1,1) - m.entry(2,2) ) ) / 2; 
+            q.y = Mathf.Sqrt( Mathf.Max( 0, 1 - m.entry(0,0) + m.entry(1,1) - m.entry(2,2) ) ) / 2; 
+            q.z = Mathf.Sqrt( Mathf.Max( 0, 1 - m.entry(0,0) - m.entry(1,1) + m.entry(2,2) ) ) / 2; 
+            q.x *= Mathf.Sign( q.x * ( m.entry(2,1) - m.entry(1,2) ) );
+            q.y *= Mathf.Sign( q.y * ( m.entry(0,2) - m.entry(2,0) ) );
+            q.z *= Mathf.Sign( q.z * ( m.entry(1,0) - m.entry(0,1) ) );
-        public static List<string> debugDescribeTransform(Matrix3 transform) {
+        public static Quaternion scaled(this Quaternion lhs, float scale) {
+            lhs.x *= scale;
+            lhs.y *= scale;
+            lhs.z *= scale;
+            lhs.w *= scale;
+            return lhs;
+        }
+        
+        public static Quaternion add(this Quaternion lhs, Quaternion rhs) {
+            lhs.x += rhs.x;
+            lhs.y += rhs.y;
+            lhs.z += rhs.z;
+            lhs.w += rhs.w;
+            return lhs;
+        }
+
+        public static List<string> debugDescribeTransform(Matrix4 transform) {
             if (transform == null) {
                 return new List<string> {"null"};
             }
             return result;
         }
 
-        public static Vector3 perspectiveTransform(this Matrix4x4 m4, Vector3 arg) {
-            List<float> argStorage = new List<float> {arg[0], arg[1], arg[2]};
-            float x_ = (m4[0] * argStorage[0]) +
-                       (m4[4] * argStorage[1]) +
-                       (m4[8] * argStorage[2]) +
-                       m4[12];
-            float y_ = (m4[1] * argStorage[0]) +
-                       (m4[5] * argStorage[1]) +
-                       (m4[9] * argStorage[2]) +
-                       m4[13];
-            float z_ = (m4[2] * argStorage[0]) +
-                       (m4[6] * argStorage[1]) +
-                       (m4[10] * argStorage[2]) +
-                       m4[14];
-            float w_ = 1.0f /
-                       ((m4[3] * argStorage[0]) +
-                        (m4[7] * argStorage[1]) +
-                        (m4[11] * argStorage[2]) +
-                        m4[15]);
-            argStorage[0] = x_ * w_;
-            argStorage[1] = y_ * w_;
-            argStorage[2] = z_ * w_;
-            return arg;
-        }
-
-        public static Offset transformPoint(Matrix4x4 transform, Offset point) {
-            Vector3 position3 = new Vector3(point.dx, point.dy, 0.0f);
+        public static Offset transformPoint(Matrix4 transform, Offset point) {
+            Vector3 position3 = new Vector3(point.dx, point.dy, 0);
-        public static Rect transformRect(Matrix4x4 transform, Rect rect) {
+        public static Rect transformRect(Matrix4 transform, Rect rect) {
             Offset point1 = transformPoint(transform, rect.topLeft);
             Offset point2 = transformPoint(transform, rect.topRight);
             Offset point3 = transformPoint(transform, rect.bottomLeft);
             );
         }
 
+        static bool isIdentity(Matrix4 a) {
+            D.assert(a != null);
+            return a[0] == 1.0 // col 1
+                   && a[1] == 0.0
+                   && a[2] == 0.0
+                   && a[3] == 0.0
+                   && a[4] == 0.0 // col 2
+                   && a[5] == 1.0
+                   && a[6] == 0.0
+                   && a[7] == 0.0
+                   && a[8] == 0.0 // col 3
+                   && a[9] == 0.0
+                   && a[10] == 1.0
+                   && a[11] == 0.0
+                   && a[12] == 0.0 // col 4
+                   && a[13] == 0.0
+                   && a[14] == 0.0
+                   && a[15] == 1.0;
+        }
+        
+        public static Rect inverseTransformRect(Matrix4 transform, Rect rect) {
+            D.assert(rect != null);
+            D.assert(transform.determinant() != 0.0);
+            if (isIdentity(transform))
+                return rect;
+            transform = Matrix4.tryInvert(transform);
+            return transformRect(transform, rect);
+        }
+        
         static float _min4(float a, float b, float c, float d) {
             return Mathf.Min(a, Mathf.Min(b, Mathf.Min(c, d)));
         }
 
             return matrix;
         }
+        
+        public static Matrix3 toMatrix3(this Matrix4 matrix4) {
+            var matrix = Matrix3.I();
+
+            matrix[0] = matrix4.entry(0, 0);
+            matrix[1] = matrix4.entry(0, 1);
+            matrix[2] = matrix4.entry(0, 3);
+
+            matrix[3] = matrix4.entry(1, 0);
+            matrix[4] = matrix4.entry(1, 1);
+            matrix[5] = matrix4.entry(1, 3);
+
+            matrix[6] = matrix4.entry(3, 0);
+            matrix[7] = matrix4.entry(3, 1);
+            matrix[8] = matrix4.entry(3, 3);
+
+            return matrix;
+        }
-    public class TransformProperty : DiagnosticsProperty<Matrix3> {
-        public TransformProperty(string name, Matrix3 value,
+    public class TransformProperty : DiagnosticsProperty<Matrix4> {
+        public TransformProperty(string name, Matrix4 value,
             bool showName = true,
             object defaultValue = null,
             DiagnosticLevel level = DiagnosticLevel.info

com.unity.uiwidgets/Runtime/rendering/box.cs

             return false;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(child != null);
             D.assert(child.parent == this);
             D.assert(() => {
 
             var childParentData = (BoxParentData) child.parentData;
             var offset = childParentData.offset;
-            transform.preTranslate(offset.dx, offset.dy);
+            transform.translate(offset.dx, offset.dy);
-
-            var inverse = Matrix3.I();
-            var invertible = transform.invert(inverse);
-            return invertible ? inverse.mapPoint(point) : Offset.zero;
+            float det = transform.invert();
+            if (det == 0) {
+                return Offset.zero;
+            }
+            Vector3 n = new Vector3(0, 0, 1);
+            Vector3 i = transform.perspectiveTransform(new Vector3(0, 0, 0));
+            Vector3 d = transform.perspectiveTransform(new Vector3(0, 0, 1)) - i;
+            Vector3 s = transform.perspectiveTransform(new Vector3(point.dx, point.dy, 0));
+            Vector3 p = s - d * (n.dot(s) / n.dot(d));
+            return new Offset(p.x, p.y);
-            return this.getTransformTo(ancestor).mapPoint(point);
+            return MatrixUtils.transformPoint(this.getTransformTo(ancestor), point);
         }
 
         public override Rect paintBounds {

com.unity.uiwidgets/Runtime/rendering/layer.cs

             }
         }
 
-        public virtual void applyTransform(Layer child, Matrix3 transform) {
+        public virtual void applyTransform(Layer child, Matrix4 transform) {
             D.assert(child != null);
             D.assert(transform != null);
         }
             return base.find<S>(regionOffset - this.offset);
         }
 
-        public override void applyTransform(Layer child, Matrix3 transform) {
+        public override void applyTransform(Layer child, Matrix4 transform) {
-            transform.preTranslate((float) this.offset.dx, (float) this.offset.dy);
+            transform.translate(this.offset.dx, this.offset.dy);
         }
 
         public Scene buildScene(SceneBuilder builder) {
     }
 
     public class TransformLayer : OffsetLayer {
-        public TransformLayer(Matrix3 transform = null, Offset offset = null) : base(offset) {
-            this._transform = transform ?? Matrix3.I();
+        public TransformLayer(Matrix4 transform = null, Offset offset = null) : base(offset) {
+            this._transform = transform ?? new Matrix4().identity();
-        public Matrix3 transform {
+        public Matrix4 transform {
-            set {
-                this._transform = value;
-                this._inverseDirty = true;
-            }
-        Matrix3 _transform;
-        Matrix3 _lastEffectiveTransform;
+        Matrix4 _transform;
+        Matrix4 _lastEffectiveTransform;
-        readonly Matrix3 _invertedTransform = Matrix3.I();
+        Matrix4 _invertedTransform;
-                this.transform.invert(this._invertedTransform);
+                this._invertedTransform = Matrix4.tryInvert(this.transform);
                 this._inverseDirty = false;
             }
 
-
-            Offset transform = this._invertedTransform.mapXY(regionOffset.dx, regionOffset.dy);
-            return base.find<S>(transform);
+            Vector4 vector = new Vector4(regionOffset.dx, regionOffset.dy, 0, 1);
+            Vector4 result = this._invertedTransform.transform(vector);
+            return base.find<S>(new Offset(result[0], result[1]));
         }
 
         internal override flow.Layer addToScene(SceneBuilder builder, Offset layerOffset = null) {
 
             var totalOffset = this.offset + layerOffset;
             if (totalOffset != Offset.zero) {
-                this._lastEffectiveTransform = Matrix3.makeTrans(totalOffset.dx, totalOffset.dy);
-                this._lastEffectiveTransform.preConcat(this._transform);
+                this._lastEffectiveTransform = new Matrix4().translationValues(totalOffset.dx, totalOffset.dy, 0);
+                this._lastEffectiveTransform.multiply(this.transform);
-            builder.pushTransform(this._lastEffectiveTransform);
+            builder.pushTransform(this._lastEffectiveTransform.toMatrix3());
-        public override void applyTransform(Layer child, Matrix3 transform) {
+        public override void applyTransform(Layer child, Matrix4 transform) {
-                transform.preConcat(this.transform);
+                transform.multiply(this.transform);
-                transform.preConcat(this._lastEffectiveTransform);
+                transform.multiply(this._lastEffectiveTransform);
-            properties.add(new DiagnosticsProperty<Matrix3>("transform", this.transform));
+            properties.add(new DiagnosticsProperty<Matrix4>("transform", this.transform));
         }
     }
 
             D.assert(this.offset != null);
             this._lastOffset = this.offset + layerOffset;
             if (this._lastOffset != Offset.zero) {
-                builder.pushTransform(Matrix3.makeTrans(this._lastOffset));
+                builder.pushTransform(new Matrix4()
+                    .translationValues(this._lastOffset.dx, this._lastOffset.dy,0)
+                    .toMatrix3());
             }
 
             this.addChildrenToScene(builder, Offset.zero);
             return null;
         }
 
-        public override void applyTransform(Layer child, Matrix3 transform) {
+        public override void applyTransform(Layer child, Matrix4 transform) {
-                transform.preTranslate(this._lastOffset.dx, this._lastOffset.dy);
+                transform.translate(this._lastOffset.dx, this._lastOffset.dy);
             }
         }
 
         public Offset linkedOffset;
 
         Offset _lastOffset;
-        Matrix3 _lastTransform;
+        Matrix4 _lastTransform;
-        readonly Matrix3 _invertedTransform = Matrix3.I();
+        Matrix4 _invertedTransform = new Matrix4().identity();
         bool _inverseDirty = true;
 
         internal override S find<S>(Offset regionOffset) {
 
             if (this._inverseDirty) {
-                this.getLastTransform().invert(this._invertedTransform);
+                this._invertedTransform = Matrix4.tryInvert(this.getLastTransform());
                 this._inverseDirty = false;
             }
 
 
-            Offset transform = this._invertedTransform.mapXY(regionOffset.dx, regionOffset.dy);
-            return base.find<S>(transform - this.linkedOffset);
+            Vector4 vector = new Vector4(regionOffset.dx, regionOffset.dy, 0, 1);
+            Vector4 result = this._invertedTransform.transform(vector);
+            return base.find<S>(new Offset(result[0] - this.linkedOffset.dx, result[1] - this.linkedOffset.dy));
-        public Matrix3 getLastTransform() {
+        public Matrix4 getLastTransform() {
-            Matrix3 result = Matrix3.makeTrans(-this._lastOffset.dx, -this._lastOffset.dy);
-            result.preConcat(this._lastTransform);
+            Matrix4 result = new Matrix4().translationValues(-this._lastOffset.dx, -this._lastOffset.dy,0 );
+            result.multiply(this._lastTransform);
-        Matrix3 _collectTransformForLayerChain(List<ContainerLayer> layers) {
-            Matrix3 result = Matrix3.I();
+        Matrix4 _collectTransformForLayerChain(List<ContainerLayer> layers) {
+            Matrix4 result = new Matrix4().identity();
             for (int index = layers.Count - 1; index > 0; index -= 1) {
                 layers[index].applyTransform(layers[index - 1], result);
             }
                 inverseLayers.Add(layer);
             } while (layer != ancestor);
 
-            Matrix3 forwardTransform = this._collectTransformForLayerChain(forwardLayers);
-            Matrix3 inverseTransform = this._collectTransformForLayerChain(inverseLayers);
-            var inverse = Matrix3.I();
-            var invertible = inverseTransform.invert(inverse);
-            if (!invertible) {
+            Matrix4 forwardTransform = this._collectTransformForLayerChain(forwardLayers);
+            Matrix4 inverseTransform = this._collectTransformForLayerChain(inverseLayers);
+            if (inverseTransform.invert() == 0) {
-            inverseTransform = inverse;
-            inverseTransform.preConcat(forwardTransform);
-            inverseTransform.preTranslate(this.linkedOffset.dx, this.linkedOffset.dy);
+            inverseTransform.multiply(forwardTransform);
+            inverseTransform.translate(this.linkedOffset.dx, this.linkedOffset.dy);
             this._lastTransform = inverseTransform;
             this._inverseDirty = true;
         }
 
             this._establishTransform();
             if (this._lastTransform != null) {
-                builder.pushTransform(this._lastTransform);
+                builder.pushTransform(this._lastTransform.toMatrix3());
                 this.addChildrenToScene(builder);
                 builder.pop();
                 this._lastOffset = this.unlinkedOffset + layerOffset;
-                var matrix = Matrix3.makeTrans(this.unlinkedOffset.dx, this.unlinkedOffset.dy);
-                builder.pushTransform(matrix);
+                var matrix = new Matrix4().translationValues(this.unlinkedOffset.dx, this.unlinkedOffset.dy, 0);
+                builder.pushTransform(matrix.toMatrix3());
                 this.addChildrenToScene(builder);
                 builder.pop();
             }
         }
 
-        public override void applyTransform(Layer child, Matrix3 transform) {
+        public override void applyTransform(Layer child, Matrix4 transform) {
-                transform.preConcat(this._lastTransform);
+                transform.multiply(this._lastTransform);
-                transform.preConcat(Matrix3.makeTrans(this.unlinkedOffset.dx, this.unlinkedOffset.dy));
+                transform.multiply(new Matrix4().translationValues(this.unlinkedOffset.dx, this.unlinkedOffset.dy, 0));
             }
         }
 
         internal Path _debugTransformedClipPath {
             get {
                 ContainerLayer ancestor = this.parent;
-                Matrix3 matrix = Matrix3.I();
+                Matrix4 matrix = new Matrix4().identity();
-                return this.clipPath.transform(matrix);
+                return this.clipPath.transform(matrix.toMatrix3());
             }
         }
 

com.unity.uiwidgets/Runtime/rendering/list_wheel_viewport.cs

             var radius = this.size.height * this._diameterRatio / 2.0f;
             var deltaY = radius * Mathf.Sin(angle);
 
-            Matrix3 transform = Matrix3.I();
+            Matrix4 transform = new Matrix4().identity();
             // Matrix4x4 transform2 = MatrixUtils.createCylindricalProjectionTransform(
             //     radius: this.size.height * this._diameterRatio / 2.0f,
             //     angle: angle,
             Offset offset,
             RenderBox child,
             // Matrix4x4 cylindricalTransform,
-            Matrix3 cylindricalTransform,
+            Matrix4 cylindricalTransform,
             Offset offsetToCenter,
             Offset untransformedPaintingCoordinates
         ) {
             Offset offset,
             RenderBox child,
             // Matrix4x4 cylindricalTransform,
-            Matrix3 cylindricalTransform,
+            Matrix4 cylindricalTransform,
             Offset offsetToCenter
         ) {
             context.pushTransform(
 
             ListWheelParentData parentData = (ListWheelParentData) child.parentData;
             float targetOffset = parentData.offset.dy;
-            Matrix4x4 transform = target.getTransformTo(this).toMatrix4x4();
+            Matrix4 transform = target.getTransformTo(this);
             Rect bounds = MatrixUtils.transformRect(transform, rect);
             Rect targetRect = bounds.translate(0.0f, (this.size.height - this.itemExtent) / 2);
 

com.unity.uiwidgets/Runtime/rendering/object.cs

             }
         }
 
-        public void pushTransform(bool needsCompositing, Offset offset, Matrix3 transform,
+        public void pushTransform(bool needsCompositing, Offset offset, Matrix4 transform,
-            Matrix3 effectiveTransform;
+            Matrix4 effectiveTransform;
-                effectiveTransform = Matrix3.makeTrans(offset.dx, offset.dy);
-                effectiveTransform.preConcat(transform);
-                effectiveTransform.preTranslate(-offset.dx, -offset.dy);
+                effectiveTransform = new Matrix4().translationValues(offset.dx, offset.dy, 0);
+                effectiveTransform.multiply(transform);
+                effectiveTransform.translate(-offset.dx, -offset.dy);
-                var inverse = Matrix3.I();
-                var invertible = effectiveTransform.invert(inverse);
-
                 // it could just be "scale == 0", ignore the assertion.
                 // D.assert(invertible);
 
                     offset,
-                    childPaintBounds: inverse.mapRect(this.estimatedBounds)
+                    childPaintBounds:  MatrixUtils.inverseTransformRect(effectiveTransform, this.estimatedBounds)
-                this.canvas.concat(effectiveTransform);
+                this.canvas.concat(effectiveTransform.toMatrix3());
                 painter(this, offset);
                 this.canvas.restore();
             }
         public virtual void paint(PaintingContext context, Offset offset) {
         }
 
-        public virtual void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public virtual void applyPaintTransform(RenderObject child, Matrix4 transform) {
-        public Matrix3 getTransformTo(RenderObject ancestor) {
+        public Matrix4 getTransformTo(RenderObject ancestor) {
             D.assert(this.attached);
 
             if (ancestor == null) {
                 renderers.Add(renderer);
             }
 
-            var transform = Matrix3.I();
+            var transform = new Matrix4().identity();
             for (int index = renderers.Count - 1; index > 0; index -= 1) {
                 renderers[index].applyPaintTransform(renderers[index - 1], transform);
             }

com.unity.uiwidgets/Runtime/rendering/proxy_box.cs

 
     public class RenderTransform : RenderProxyBox {
         public RenderTransform(
-            Matrix3 transform,
+            Matrix4 transform,
             Offset origin = null,
             Alignment alignment = null,
             bool transformHitTests = true,
 
         public bool transformHitTests;
 
-        public Matrix3 transform {
+        public Matrix4 transform {
             set {
                 if (this._transform == value) {
                     return;
             }
         }
 
-        Matrix3 _transform;
+        Matrix4 _transform;
-            this._transform = Matrix3.I();
+            this._transform = new Matrix4().identity();
             this.markNeedsPaint();
         }
 
         }
 
         public void rotateZ(float degrees) {
-            this._transform.preRotate(degrees);
+            this._transform.rotateZ(degrees);
-            this._transform.preTranslate(x, y);
+            this._transform.translationValues(x, y, 0);
-            this._transform.preScale(x, y);
+            this._transform.scale(x, y, 1);
-        Matrix3 _effectiveTransform {
+        Matrix4 _effectiveTransform {
             get {
                 Alignment resolvedAlignment = this.alignment;
                 if (this._origin == null && resolvedAlignment == null) {
-                var result = Matrix3.I();
+                var result = new Matrix4().identity();
-                    result.preTranslate(this._origin.dx, this._origin.dy);
+                    result.translate(this._origin.dx, this._origin.dy);
-                    result.preTranslate(translation.dx, translation.dy);
+                    result.translate(translation.dx, translation.dy);
-                result.preConcat(this._transform);
+                result.multiply(this._transform);
-                    result.preTranslate(-translation.dx, -translation.dy);
+                    result.translate(-translation.dx, -translation.dy);
-                    result.preTranslate(-this._origin.dx, -this._origin.dy);
+                    result.translate(-this._origin.dx, -this._origin.dy);
                 }
 
                 return result;
         protected override bool hitTestChildren(HitTestResult result, Offset position = null) {
             if (this.transformHitTests) {
                 var transform = this._effectiveTransform;
-                var inverse = Matrix3.I();
-                var invertible = transform.invert(inverse);
+                var inverse = Matrix4.tryInvert(transform);
-                if (!invertible) {
+                if (inverse == null) {
-                position = inverse.mapPoint(position);
+                position = MatrixUtils.transformPoint(inverse, position);
             }
 
             return base.hitTestChildren(result, position: position);
             }
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
-            transform.preConcat(this._effectiveTransform);
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
+            transform.multiply(this._effectiveTransform);
-            properties.add(new DiagnosticsProperty<Matrix3>("transform matrix", this._transform));
+            properties.add(new DiagnosticsProperty<Matrix4>("transform matrix", this._transform));
             properties.add(new DiagnosticsProperty<Offset>("origin", this.origin));
             properties.add(new DiagnosticsProperty<Alignment>("alignment", this.alignment));
             properties.add(new DiagnosticsProperty<bool>("transformHitTests", this.transformHitTests));
         }
 
         bool? _hasVisualOverflow;
-        Matrix3 _transform;
+        Matrix4 _transform;
 
         void _clearPaintData() {
             this._hasVisualOverflow = null;
 
             if (this.child == null) {
                 this._hasVisualOverflow = false;
-                this._transform = Matrix3.I();
+                this._transform = new Matrix4().identity();
             }
             else {
                 this._resolve();
                 Rect sourceRect = this._resolvedAlignment.inscribe(sizes.source, Offset.zero & childSize);
                 Rect destinationRect = this._resolvedAlignment.inscribe(sizes.destination, Offset.zero & this.size);
                 this._hasVisualOverflow = sourceRect.width < childSize.width || sourceRect.height < childSize.height;
-                this._transform = Matrix3.makeTrans(destinationRect.left, destinationRect.top);
-                this._transform.postScale(scaleX, scaleY);
-                this._transform.postTranslate(-sourceRect.left, -sourceRect.top);
+                this._transform = new Matrix4().translationValues(destinationRect.left, destinationRect.top, 0);
+                this._transform.scale(scaleX, scaleY, 1);
+                this._transform.translate(-sourceRect.left, -sourceRect.top);
             }
         }
 
             }
 
             this._updatePaintData();
-            Matrix3 inverse = Matrix3.I();
-            if (!this._transform.invert(inverse)) {
+            Matrix4 inverse = Matrix4.tryInvert(this._transform);
+            
+            if (inverse == null) {
-            position = inverse.mapPoint(position);
+            position = MatrixUtils.transformPoint(inverse, position);
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
-                transform.setAll(0, 0, 0, 0, 0, 0, 0, 0, 0);
+                transform.setZero();
-                transform.postConcat(this._transform);
+                transform.multiply(this._transform);
             }
         }
 
             }
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
-            transform.preTranslate(this.translation.dx * this.size.width,
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
+            transform.translate(this.translation.dx * this.size.width,
                 this.translation.dy * this.size.height);
         }
 
 
         new FollowerLayer _layer;
 
-        Matrix3 getCurrentTransform() {
-            return this._layer?.getLastTransform() ?? Matrix3.I();
+        Matrix4 getCurrentTransform() {
+            return this._layer?.getLastTransform() ?? new Matrix4().identity();
         }
 
         public override bool hitTest(HitTestResult result, Offset position) {
         protected override bool hitTestChildren(HitTestResult result, Offset position) {
-            Matrix3 inverse = Matrix3.I();
-            if (!this.getCurrentTransform().invert(inverse)) {
+            Matrix4 inverse = Matrix4.tryInvert(this.getCurrentTransform());
+            if (inverse == null) {
-            position = inverse.mapPoint(position);
+            position = MatrixUtils.transformPoint(inverse, position);
             return base.hitTestChildren(result, position: position);
         }
 
             );
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
-            transform.preConcat(this.getCurrentTransform());
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
+            transform.multiply(this.getCurrentTransform());
         }
 
         public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {

com.unity.uiwidgets/Runtime/rendering/proxy_box.mixin.gen.cs

             return false;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
         }
 
         public override void paint(PaintingContext context, Offset offset) {

com.unity.uiwidgets/Runtime/rendering/rotated_box.cs

 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.gestures;
+using Unity.UIWidgets.painting;
 using Unity.UIWidgets.rendering;
 using Unity.UIWidgets.ui;
 using UnityEngine;
             return this._isVertical ? this.child.getMaxIntrinsicWidth(width) : this.child.getMaxIntrinsicHeight(width);
         }
 
-        Matrix3 _paintTransform;
+        Matrix4 _paintTransform;
 
         protected override void performLayout() {
             this._paintTransform = null;
                     ? new Size(this.child.size.height, this.child.size.width)
                     : this.child.size;
-                this._paintTransform = Matrix3.I();
-                this._paintTransform.preTranslate(this.size.width / 2.0f, this.size.height / 2.0f);
-                this._paintTransform.preRotate(RotatedBoxUtils._kQuarterTurnsInRadians * (this.quarterTurns % 4));
-                this._paintTransform.preTranslate(-this.child.size.width / 2.0f, -this.child.size.height / 2.0f);
+                this._paintTransform = new Matrix4().identity();
+                this._paintTransform.translate(this.size.width / 2.0f, this.size.height / 2.0f);
+                this._paintTransform.rotateZ(RotatedBoxUtils._kQuarterTurnsInRadians * (this.quarterTurns % 4));
+                this._paintTransform.translate(-this.child.size.width / 2.0f, -this.child.size.height / 2.0f);
             }
             else {
                 this.performResize();
             if (this.child == null || this._paintTransform == null) {
                 return false;
             }
-
-
-            Matrix3 inverse = Matrix3.I();
-            this._paintTransform.invert(inverse);
-            return this.child.hitTest(result, position: inverse.mapPoint(position));
+            
+            var inverse = new Matrix4().inverted(this._paintTransform);
+            return this.child.hitTest(result, position:MatrixUtils.transformPoint(inverse, position));
         }
 
         void _paintChild(PaintingContext context, Offset offset) {
             }
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
-                transform.preConcat(this._paintTransform);
+                transform.multiply(this._paintTransform);
             }
 
             base.applyPaintTransform(child, transform);

com.unity.uiwidgets/Runtime/rendering/sliver.cs

     public class SliverPhysicalParentData : ParentData {
         public Offset paintOffset = Offset.zero;
 
-        public void applyPaintTransform(Matrix3 transform) {
-            transform.preTranslate(this.paintOffset.dx, this.paintOffset.dy);
+        public void applyPaintTransform(Matrix4 transform) {
+            transform.translate(this.paintOffset.dx, this.paintOffset.dy);
         }
 
         public override string ToString() {
             return 0.0f;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(() => { throw new UIWidgetsError(this.GetType() + " does not implement applyPaintTransform."); });
         }
 
         }
 
         public static void applyPaintTransformForBoxChild(this RenderSliver it, RenderBox child,
-            Matrix3 transform) {
+            Matrix4 transform) {
             bool rightWayUp = _getRightWayUp(it.constraints);
             float delta = it.childMainAxisPosition(child);
             float crossAxisDelta = it.childCrossAxisPosition(child);
                         delta = it.geometry.paintExtent - child.size.width - delta;
                     }
 
-                    transform.preTranslate(delta, crossAxisDelta);
+                    transform.translate(delta, crossAxisDelta);
                     break;
                 case Axis.vertical:
                     if (!rightWayUp) {
-                    transform.preTranslate(crossAxisDelta, delta);
+                    transform.translate(crossAxisDelta, delta);
                     break;
             }
         }
             return -this.constraints.scrollOffset;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(child != null);
             D.assert(child == this.child);
 

com.unity.uiwidgets/Runtime/rendering/sliver_multi_box_adaptor.cs

             return childParentData.layoutOffset;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             this.applyPaintTransformForBoxChild((RenderBox) child, transform);
         }
 

com.unity.uiwidgets/Runtime/rendering/sliver_padding.cs

             return this.beforePadding;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(child != null);
             D.assert(child == this.child);
 

com.unity.uiwidgets/Runtime/rendering/sliver_persistent_header.cs

             return false;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(child != null);
             D.assert(child == this.child);
             RenderSliverHelpers.applyPaintTransformForBoxChild(this, this.child, transform);

com.unity.uiwidgets/Runtime/rendering/view.cs

 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.gestures;
+using Unity.UIWidgets.painting;
+using Rect = Unity.UIWidgets.ui.Rect;
 
 namespace Unity.UIWidgets.rendering {
     public class ViewConfiguration {
 
         public readonly float devicePixelRatio;
 
-        public Matrix3 toMatrix() {
-            return Matrix3.I();
+        public Matrix4 toMatrix() {
+            // return new Matrix4().diagonal3Values(this.devicePixelRatio, this.devicePixelRatio, 0);
+            return new Matrix4().identity();
         }
 
         public override string ToString() {
             this.owner.requestVisualUpdate();
         }
 
-        Matrix3 _rootTransform;
+        Matrix4 _rootTransform;
 
         public Layer _updateMatricesAndCreateNewRootLayer() {
             this._rootTransform = this.configuration.toMatrix();
             }
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
-            transform.preConcat(this._rootTransform);
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
+            transform.multiply(this._rootTransform);
             base.applyPaintTransform(child, transform);
         }
 
         public override Rect semanticBounds {
             get {
                 D.assert(this._rootTransform != null);
-                return this._rootTransform.mapRect(Offset.zero & this.size);
+                return MatrixUtils.transformRect(this._rootTransform, Offset.zero & this.size);
             }
         }
 

com.unity.uiwidgets/Runtime/rendering/viewport.cs

             float targetMainAxisExtent = 0.0f;
             rect = rect ?? target.paintBounds;
 
-            Matrix3 transform;
+            Matrix4 transform;
 
             RenderObject child = target;
             RenderBox pivot = null;
                 RenderSliver pivotParent = (RenderSliver) pivot.parent;
 
                 transform = target.getTransformTo(pivot);
-                Rect bounds = transform.mapRect(rect);
+                Rect bounds = MatrixUtils.transformRect(transform, rect);
 
                 float offset = 0.0f;
 
 
             transform = target.getTransformTo(this);
             this.applyPaintTransform(child, transform);
-            Rect targetRect = transform.mapRect(rect);
+            Rect targetRect = MatrixUtils.transformRect(transform, rect);
 
             switch (this.axisDirection) {
                 case AxisDirection.down:
             }
             else {
                 var transform = descendant.getTransformTo(viewport.parent);
-                return transform.mapRect(rect ?? descendant.paintBounds);
+                return MatrixUtils.transformRect(transform, rect ?? descendant.paintBounds);
             }
 
             D.assert(targetOffset != null);
             return 0.0f;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
             D.assert(child != null);
 
             var childParentData = (SliverPhysicalParentData) child.parentData;
             return pinnedExtent;
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
-            transform.preTranslate(offset.dx, offset.dy);
+            transform.translate(offset.dx, offset.dy);
         }
 
         protected override float computeChildMainAxisPosition(RenderSliver child, float parentMainAxisPosition) {

com.unity.uiwidgets/Runtime/widgets/basic.cs

     public class Transform : SingleChildRenderObjectWidget {
         public Transform(
             Key key = null,
-            Matrix3 transform = null,
+            Matrix4 transform = null,
             Offset origin = null,
             Alignment alignment = null,
             bool transformHitTests = true,
-            this.transform = new Matrix3(transform);
+            this.transform = new Matrix4(transform);
             this.origin = origin;
             this.alignment = alignment;
             this.transformHitTests = transformHitTests;
             Widget child = null,
             float degree = 0.0f
         ) : base(key: key, child: child) {
-            this.transform = Matrix3.makeRotate(degree);
+            this.transform = new Matrix4().rotationZ(degree);
             this.origin = origin;
             this.alignment = alignment;
             this.transformHitTests = transformHitTests;
             Widget child = null
         ) : base(key: key, child: child) {
             D.assert(offset != null);
-            this.transform = Matrix3.makeTrans(offset.dx, offset.dy);
+            this.transform = new Matrix4().translationValues(offset.dx, offset.dy, 0);
             this.origin = null;
             this.alignment = null;
             this.transformHitTests = transformHitTests;
             bool transformHitTests = true,
             Widget child = null
         ) : base(key: key, child: child) {
-            this.transform = Matrix3.makeScale(scale, scale);
+            this.transform = new Matrix4().translationValues(scale, scale, scale);
             this.origin = origin;
             this.alignment = alignment;
             this.transformHitTests = transformHitTests;
             return new Transform(key, scale, origin, alignment, transformHitTests, child);
         }
 
-        public readonly Matrix3 transform;
+        public readonly Matrix4 transform;
         public readonly Offset origin;
         public readonly Alignment alignment;
         public readonly bool transformHitTests;

com.unity.uiwidgets/Runtime/widgets/container.cs

             float? height = null,
             BoxConstraints constraints = null,
             EdgeInsets margin = null,
-            Matrix3 transfrom = null,
+            Matrix4 transfrom = null,
             Widget child = null
         ) : base(key) {
             D.assert(margin == null || margin.isNonNegative);
         public readonly Decoration foregroundDecoration;
         public readonly BoxConstraints constraints;
         public readonly EdgeInsets margin;
-        public readonly Matrix3 transform;
+        public readonly Matrix4 transform;
 
         EdgeInsets _paddingIncludingDecoration {
             get {
             }
 
             if (this.transform != null) {
-                current = new Transform(transform: new Matrix3(this.transform), child: current);
+                current = new Transform(transform: new Matrix4(this.transform), child: current);
             }
 
             return current;
                 this.constraints, defaultValue: Diagnostics.kNullDefaultValue));
             properties.add(new DiagnosticsProperty<EdgeInsets>("margin",
                 this.margin, defaultValue: Diagnostics.kNullDefaultValue));
-            properties.add(ObjectFlagProperty<Matrix3>.has("transform",
+            properties.add(ObjectFlagProperty<Matrix4>.has("transform",
                 this.transform));
         }
     }

com.unity.uiwidgets/Runtime/widgets/heroes.cs

 using System.Collections.Generic;
 using Unity.UIWidgets.animation;
 using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
 using Unity.UIWidgets.rendering;
 using Unity.UIWidgets.ui;
 
         public static Rect _globalBoundingBoxFor(BuildContext context) {
             RenderBox box = (RenderBox) context.findRenderObject();
             D.assert(box != null && box.hasSize);
-            return box.getTransformTo(null).mapRect(Offset.zero & box.size);
+            return MatrixUtils.transformRect( box.getTransformTo(null), Offset.zero & box.size);
         }
     }
 

com.unity.uiwidgets/Runtime/widgets/implicit_animations.cs

 using Unity.UIWidgets.painting;
 using Unity.UIWidgets.rendering;
 using Unity.UIWidgets.ui;
+using UnityEngine;
+using Color = Unity.UIWidgets.ui.Color;
+using Rect = Unity.UIWidgets.ui.Rect;
 using TextStyle = Unity.UIWidgets.painting.TextStyle;
 
 namespace Unity.UIWidgets.widgets {
     }
 
 
-    public class Matrix3Tween : Tween<Matrix3> {
-        public Matrix3Tween(
-            Matrix3 begin = null,
-            Matrix3 end = null) : base(begin: begin, end: end) {
+    public class Matrix4Tween : Tween<Matrix4> {
+        public Matrix4Tween(
+            Matrix4 begin = null,
+            Matrix4 end = null) : base(begin: begin, end: end) {
-        //todo:xingwei.zhu implement full matrix3 lerp
-        public override Matrix3 lerp(float t) {
+        public override Matrix4 lerp(float t) {
-            return t < 0.5 ? this.begin : this.end;
+            Vector3 beginTranslation = Vector3.zero;
+            Vector3 endTranslation = Vector3.zero;
+            Quaternion beginRotation = Quaternion.identity;
+            Quaternion endRotation = Quaternion.identity;
+            Vector3 beginScale = Vector3.zero;
+            Vector3 endScale = Vector3.zero;
+            this.begin.decompose(ref beginTranslation, ref beginRotation, ref beginScale);
+            this.end.decompose(ref endTranslation, ref endRotation, ref endScale);
+            Vector3 lerpTranslation =
+                beginTranslation * (1.0f - t) + endTranslation * t;
+            // TODO(alangardner): Implement slerp for constant rotation
+            Quaternion lerpRotation =
+                beginRotation
+                    .scaled(1.0f - t)
+                    .add(endRotation.scaled(t)).normalized;
+            Vector3 lerpScale = beginScale * (1.0f - t) + endScale * t;
+            return new Matrix4().compose(lerpTranslation, lerpRotation, lerpScale);
         }
     }
 
             float? height = null,
             BoxConstraints constraints = null,
             EdgeInsets margin = null,
-            Matrix3 transform = null,
+            Matrix4 transform = null,
             Widget child = null,
             Curve curve = null,
             TimeSpan? duration = null
 
         public readonly EdgeInsets margin;
 
-        public readonly Matrix3 transform;
+        public readonly Matrix4 transform;
 
 
         public override State createState() {
                 defaultValue: null,
                 showName: false));
             properties.add(new DiagnosticsProperty<EdgeInsets>("margin", this.margin, defaultValue: null));
-            properties.add(ObjectFlagProperty<Matrix3>.has("transform", this.transform));
+            properties.add(ObjectFlagProperty<Matrix4>.has("transform", this.transform));
         }
     }
 
         DecorationTween _foregroundDecoration;
         BoxConstraintsTween _constraints;
         EdgeInsetsTween _margin;
-        Matrix3Tween _transform;
+        Matrix4Tween _transform;
 
 
         protected override void forEachTween(TweenVisitor visitor) {
                 (BoxConstraints value) => new BoxConstraintsTween(begin: value));
             this._margin = (EdgeInsetsTween) visitor.visit(this, this._margin, this.widget.margin,
                 (EdgeInsets value) => new EdgeInsetsTween(begin: value));
-            this._transform = (Matrix3Tween) visitor.visit(this, this._transform, this.widget.transform,
-                (Matrix3 value) => new Matrix3Tween(begin: value));
+            this._transform = (Matrix4Tween) visitor.visit(this, this._transform, this.widget.transform,
+                (Matrix4 value) => new Matrix4Tween(begin: value));
         }
 
 
             description.add(new DiagnosticsProperty<BoxConstraintsTween>("constraints", this._constraints,
                 showName: false, defaultValue: null));
             description.add(new DiagnosticsProperty<EdgeInsetsTween>("margin", this._margin, defaultValue: null));
-            description.add(ObjectFlagProperty<Matrix3Tween>.has("transform", this._transform));
+            description.add(ObjectFlagProperty<Matrix4Tween>.has("transform", this._transform));
         }
     }
 

com.unity.uiwidgets/Runtime/widgets/nested_scroll_view.cs

                 childLayoutGeometry.maxScrollObstructionExtent);
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
         }
 
         protected override bool hitTestChildren(

com.unity.uiwidgets/Runtime/widgets/single_child_scroll_view.cs

             }
         }
 
-        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+        public override void applyPaintTransform(RenderObject child, Matrix4 transform) {
-            transform.preTranslate(paintOffset.dx, paintOffset.dy);
+            transform.translate(paintOffset.dx, paintOffset.dy);
         }
 
         public override Rect describeApproximatePaintClip(RenderObject child) {
             }
 
             RenderBox targetBox = (RenderBox) target;
-            Matrix3 transform = targetBox.getTransformTo(this);
-            Rect bounds = transform.mapRect(rect);
+            Matrix4 transform = targetBox.getTransformTo(this);
+            Rect bounds = MatrixUtils.transformRect(transform, rect);
             Size contentSize = this.child.size;
 
             float leadingScrollOffset = 0.0f;

com.unity.uiwidgets/Runtime/widgets/transitions.cs

 
         protected internal override Widget build(BuildContext context) {
             float scaleValue = this.scale.value;
-            Matrix3 transform = Matrix3.makeScale(scaleValue, scaleValue);
+            Matrix4 transform = new Matrix4().diagonal3Values(scaleValue, scaleValue, 1);
             return new Transform(
                 transform: transform,
                 alignment: this.alignment,
 
         protected internal override Widget build(BuildContext context) {
             float turnsValue = this.turns.value;
-            Matrix3 transform = Matrix3.makeRotate((turnsValue * Mathf.PI * 2.0f));
+            Matrix4 transform = new Matrix4().rotationZ((turnsValue * Mathf.PI * 2.0f));
             return new Transform(
                 transform: transform,
                 alignment: this.alignment,

com.unity.uiwidgets/Runtime/widgets/widget_inspector.cs

 using RSG;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.gestures;
+using Unity.UIWidgets.painting;
 using Unity.UIWidgets.rendering;
 using Unity.UIWidgets.scheduler;
 using Unity.UIWidgets.ui;
             List<RenderObject> edgeHits,
             Offset position,
             RenderObject renderObject,
-            Matrix3 transform
+            Matrix4 transform
+            
-            var inverse = Matrix3.I();
-            var invertible = transform.invert(inverse);
-            if (!invertible) {
+            var inverse = new Matrix4().inverted(transform);
+            if (inverse == null) {
-            var localPosition = inverse.mapPoint(position);
+            var localPosition = MatrixUtils.transformPoint(inverse, position);
 
             List<DiagnosticsNode> children = renderObject.debugDescribeChildren();
             for (int i = children.Count - 1; i >= 0; --i) {
                     continue;
                 }
 
-                var childTransform = new Matrix3(transform);
+                var childTransform = new Matrix4(transform);
                 renderObject.applyPaintTransform(child, childTransform);
                 if (this._hitTestHelper(hits, edgeHits, position, child, childTransform)) {
                     hit = true;
 
     class _TransformedRect : IEquatable<_TransformedRect> {
         public readonly Rect rect;
-        public readonly Matrix3 transform;
+        public readonly Matrix4 transform;
 
         public _TransformedRect(RenderObject obj) {
             this.rect = obj.semanticBounds;
             };
             Rect selectedPaintRect = state.selected.rect.deflate(0.5f);
             canvas.save();
-            canvas.setMatrix(state.selected.transform);
+            canvas.setMatrix(state.selected.transform.toMatrix3());
             canvas.drawRect(selectedPaintRect, fillPaint);
             canvas.drawRect(selectedPaintRect, borderPaint);
             canvas.restore();
-                canvas.setMatrix(transformedRect.transform);
+                canvas.setMatrix(transformedRect.transform.toMatrix3());
                 canvas.drawRect(transformedRect.rect.deflate(0.5f), borderPaint);
                 canvas.restore();
             }

com.unity.uiwidgets/Runtime/ui/Matrix4.cs

+using System;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using UnityEngine;
+
+namespace Unity.UIWidgets.ui {
+    public class Matrix4 : IEquatable<Matrix4> {
+        internal readonly float[] _m4storage;
+
+        int dimension {
+            get { return 4; }
+        }
+
+        public Matrix4() {
+            this._m4storage = new float[16];
+        }
+
+        public Matrix4(Matrix4 other) {
+            this._m4storage = new float[16];
+            this.setFrom(other);
+        }
+
+        public static Matrix4 tryInvert(Matrix4 other) {
+            Matrix4 r = new Matrix4();
+            float determinant = r.copyInverse(other);
+            if (determinant == 0) {
+                return null;
+            }
+
+            return r;
+        }
+
+        public Matrix4(
+            float arg0,
+            float arg1,
+            float arg2,
+            float arg3,
+            float arg4,
+            float arg5,
+            float arg6,
+            float arg7,
+            float arg8,
+            float arg9,
+            float arg10,
+            float arg11,
+            float arg12,
+            float arg13,
+            float arg14,
+            float arg15) {
+            this._m4storage = new float[16];
+            this.setValues(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9,
+                arg10, arg11, arg12, arg13, arg14, arg15);
+        }
+
+        public Matrix4 fromList(
+            float arg0,
+            float arg1,
+            float arg2,
+            float arg3,
+            float arg4,
+            float arg5,
+            float arg6,
+            float arg7,
+            float arg8,
+            float arg9,
+            float arg10,
+            float arg11,
+            float arg12,
+            float arg13,
+            float arg14,
+            float arg15) {
+            this.setValues(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9,
+                arg10, arg11, arg12, arg13, arg14, arg15);
+            return this;
+        }
+
+        public Matrix4 identity() {
+            this.setIdentity();
+            return this;
+        }
+
+        public Matrix4 inverted(Matrix4 other) {
+            double determinant = this.copyInverse(other);
+            if (determinant == 0) {
+                // throw new Exception("input matrix cannot be inverted");
+                return null;
+            }
+
+            return this;
+        }
+
+        public Matrix4 copy(Matrix4 other) {
+            this.setFrom(other);
+            return this;
+        }
+
+        public Matrix4 compose(Vector3 translation, Quaternion rotation, Vector3 scale) {
+            this.setFromTranslationRotationScale(translation, rotation, scale);
+            return this;
+        }
+
+        public Matrix4 clone() => new Matrix4().copy(this);
+
+        public static Matrix4 operator *(Matrix4 a, Matrix4 b) {
+            var result = a.clone();
+            result.multiply(b);
+            return result;
+        }
+
+        void setFromTranslationRotationScale(
+            Vector3 translation, Quaternion rotation, Vector3 scale) {
+            this.setFromTranslationRotation(translation, rotation);
+            this.scale(scale);
+        }
+        
+        void setFromTranslationRotation(Vector3 arg0, Quaternion arg1) {
+            float x = arg1[0];
+            float y = arg1[1];
+            float z = arg1[2];
+            float w = arg1[3];
+            float x2 = x + x;
+            float y2 = y + y;
+            float z2 = z + z;
+            float xx = x * x2;
+            float xy = x * y2;
+            float xz = x * z2;
+            float yy = y * y2;
+            float yz = y * z2;
+            float zz = z * z2;
+            float wx = w * x2;
+            float wy = w * y2;
+            float wz = w * z2;
+
+            this._m4storage[0] = 1.0f - (yy + zz);
+            this._m4storage[1] = xy + wz;
+            this._m4storage[2] = xz - wy;
+            this._m4storage[3] = 0;
+            this._m4storage[4] = xy - wz;
+            this._m4storage[5] = 1.0f - (xx + zz);
+            this._m4storage[6] = yz + wx;
+            this._m4storage[7] = 0;
+            this._m4storage[8] = xz + wy;
+            this._m4storage[9] = yz - wx;
+            this._m4storage[10] = 1.0f - (xx + yy);
+            this._m4storage[11] = 0;
+            this._m4storage[12] = arg0[0];
+            this._m4storage[13] = arg0[1];
+            this._m4storage[14] = arg0[2];
+            this._m4storage[15] = 1.0f;
+        }
+        
+        void setFrom(Matrix4 arg) {
+            this._m4storage[15] = arg[15];
+            this._m4storage[14] = arg[14];
+            this._m4storage[13] = arg[13];
+            this._m4storage[12] = arg[12];
+            this._m4storage[11] = arg[11];
+            this._m4storage[10] = arg[10];
+            this._m4storage[9] = arg[9];
+            this._m4storage[8] = arg[8];
+            this._m4storage[7] = arg[7];
+            this._m4storage[6] = arg[6];
+            this._m4storage[5] = arg[5];
+            this._m4storage[4] = arg[4];
+            this._m4storage[3] = arg[3];
+            this._m4storage[2] = arg[2];
+            this._m4storage[1] = arg[1];
+            this._m4storage[0] = arg[0];
+        }
+
+        void setValues(
+            float arg0,
+            float arg1,
+            float arg2,
+            float arg3,
+            float arg4,
+            float arg5,
+            float arg6,
+            float arg7,
+            float arg8,
+            float arg9,
+            float arg10,
+            float arg11,
+            float arg12,
+            float arg13,
+            float arg14,
+            float arg15) {
+            this._m4storage[15] = arg15;
+            this._m4storage[14] = arg14;
+            this._m4storage[13] = arg13;
+            this._m4storage[12] = arg12;
+            this._m4storage[11] = arg11;
+            this._m4storage[10] = arg10;
+            this._m4storage[9] = arg9;
+            this._m4storage[8] = arg8;
+            this._m4storage[7] = arg7;
+            this._m4storage[6] = arg6;
+            this._m4storage[5] = arg5;
+            this._m4storage[4] = arg4;
+            this._m4storage[3] = arg3;
+            this._m4storage[2] = arg2;
+            this._m4storage[1] = arg1;
+            this._m4storage[0] = arg0;
+        }
+
+        public void setZero() {
+            this._m4storage[0] = 0;
+            this._m4storage[1] = 0;
+            this._m4storage[2] = 0;
+            this._m4storage[3] = 0;
+            this._m4storage[4] = 0;
+            this._m4storage[5] = 0;
+            this._m4storage[6] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[8] = 0;
+            this._m4storage[9] = 0;
+            this._m4storage[10] = 0;
+            this._m4storage[11] = 0;
+            this._m4storage[12] = 0;
+            this._m4storage[13] = 0;
+            this._m4storage[14] = 0;
+            this._m4storage[15] = 0;
+        }
+
+        void setIdentity() {
+            this._m4storage[0] = 1;
+            this._m4storage[1] = 0;
+            this._m4storage[2] = 0;
+            this._m4storage[3] = 0;
+            this._m4storage[4] = 0;
+            this._m4storage[5] = 1;
+            this._m4storage[6] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[8] = 0;
+            this._m4storage[9] = 0;
+            this._m4storage[10] = 1;
+            this._m4storage[11] = 0;
+            this._m4storage[12] = 0;
+            this._m4storage[13] = 0;
+            this._m4storage[14] = 0;
+            this._m4storage[15] = 1;
+        }
+
+        Matrix4 absolute() {
+            Matrix4 r = new Matrix4();
+            this[0] = this._m4storage[0].abs();
+            this[1] = this._m4storage[1].abs();
+            this[2] = this._m4storage[2].abs();
+            this[3] = this._m4storage[3].abs();
+            this[4] = this._m4storage[4].abs();
+            this[5] = this._m4storage[5].abs();
+            this[6] = this._m4storage[6].abs();
+            this[7] = this._m4storage[7].abs();
+            this[8] = this._m4storage[8].abs();
+            this[9] = this._m4storage[9].abs();
+            this[10] = this._m4storage[10].abs();
+            this[11] = this._m4storage[11].abs();
+            this[12] = this._m4storage[12].abs();
+            this[13] = this._m4storage[13].abs();
+            this[14] = this._m4storage[14].abs();
+            this[15] = this._m4storage[15].abs();
+            return r;
+        }
+
+        public float determinant() {
+            float det2_01_01 =
+                this._m4storage[0] * this._m4storage[5] - this._m4storage[1] * this._m4storage[4];
+            float det2_01_02 =
+                this._m4storage[0] * this._m4storage[6] - this._m4storage[2] * this._m4storage[4];
+            float det2_01_03 =
+                this._m4storage[0] * this._m4storage[7] - this._m4storage[3] * this._m4storage[4];
+            float det2_01_12 =
+                this._m4storage[1] * this._m4storage[6] - this._m4storage[2] * this._m4storage[5];
+            float det2_01_13 =
+                this._m4storage[1] * this._m4storage[7] - this._m4storage[3] * this._m4storage[5];
+            float det2_01_23 =
+                this._m4storage[2] * this._m4storage[7] - this._m4storage[3] * this._m4storage[6];
+            float det3_201_012 = this._m4storage[8] * det2_01_12 -
+                                 this._m4storage[9] * det2_01_02 +
+                                 this._m4storage[10] * det2_01_01;
+            float det3_201_013 = this._m4storage[8] * det2_01_13 -
+                                 this._m4storage[9] * det2_01_03 +
+                                 this._m4storage[11] * det2_01_01;
+            float det3_201_023 = this._m4storage[8] * det2_01_23 -
+                                 this._m4storage[10] * det2_01_03 +
+                                 this._m4storage[11] * det2_01_02;
+            float det3_201_123 = this._m4storage[9] * det2_01_23 -
+                                 this._m4storage[10] * det2_01_13 +
+                                 this._m4storage[11] * det2_01_12;
+            return -det3_201_123 * this._m4storage[12] +
+                   det3_201_023 * this._m4storage[13] -
+                   det3_201_013 * this._m4storage[14] +
+                   det3_201_012 * this._m4storage[15];
+        }
+
+        float invertRotation() {
+            float det = this.determinant();
+            if (det == 0) {
+                return 0;
+            }
+
+            float invDet = 1.0f / det;
+            float ix;
+            float iy;
+            float iz;
+            float jx;
+            float jy;
+            float jz;
+            float kx;
+            float ky;
+            float kz;
+            ix = invDet *
+                 (this._m4storage[5] * this._m4storage[10] - this._m4storage[6] * this._m4storage[9]);
+            iy = invDet *
+                 (this._m4storage[2] * this._m4storage[9] - this._m4storage[1] * this._m4storage[10]);
+            iz = invDet *
+                 (this._m4storage[1] * this._m4storage[6] - this._m4storage[2] * this._m4storage[5]);
+            jx = invDet *
+                 (this._m4storage[6] * this._m4storage[8] - this._m4storage[4] * this._m4storage[10]);
+            jy = invDet *
+                 (this._m4storage[0] * this._m4storage[10] - this._m4storage[2] * this._m4storage[8]);
+            jz = invDet *
+                 (this._m4storage[2] * this._m4storage[4] - this._m4storage[0] * this._m4storage[6]);
+            kx = invDet *
+                 (this._m4storage[4] * this._m4storage[9] - this._m4storage[5] * this._m4storage[8]);
+            ky = invDet *
+                 (this._m4storage[1] * this._m4storage[8] - this._m4storage[0] * this._m4storage[9]);
+            kz = invDet *
+                 (this._m4storage[0] * this._m4storage[5] - this._m4storage[1] * this._m4storage[4]);
+            this._m4storage[0] = ix;
+            this._m4storage[1] = iy;
+            this._m4storage[2] = iz;
+            this._m4storage[4] = jx;
+            this._m4storage[5] = jy;
+            this._m4storage[6] = jz;
+            this._m4storage[8] = kx;
+            this._m4storage[9] = ky;
+            this._m4storage[10] = kz;
+            return det;
+        }
+
+        public Vector4 transform(Vector4 arg) {
+            float x_ = (this._m4storage[0] * arg[0]) +
+                       (this._m4storage[4] * arg[1]) +
+                       (this._m4storage[8] * arg[2]) +
+                       (this._m4storage[12] * arg[3]);
+            float y_ = (this._m4storage[1] * arg[0]) +
+                       (this._m4storage[5] * arg[1]) +
+                       (this._m4storage[9] * arg[2]) +
+                       (this._m4storage[13] * arg[3]);
+            float z_ = (this._m4storage[2] * arg[0]) +
+                       (this._m4storage[6] * arg[1]) +
+                       (this._m4storage[10] * arg[2]) +
+                       (this._m4storage[14] * arg[3]);
+            float w_ = (this._m4storage[3] * arg[0]) +
+                       (this._m4storage[7] * arg[1]) +
+                       (this._m4storage[11] * arg[2]) +
+                       (this._m4storage[15] * arg[3]);
+            arg[0] = x_;
+            arg[1] = y_;
+            arg[2] = z_;
+            arg[3] = w_;
+            return arg;
+        }
+
+        public Vector3 perspectiveTransform(Vector3 arg) {
+            float x_ = (this._m4storage[0] * arg[0]) +
+                       (this._m4storage[4] * arg[1]) +
+                       (this._m4storage[8] * arg[2]) +
+                       this._m4storage[12];
+            float y_ = (this._m4storage[1] * arg[0]) +
+                       (this._m4storage[5] * arg[1]) +
+                       (this._m4storage[9] * arg[2]) +
+                       this._m4storage[13];
+            float z_ = (this._m4storage[2] * arg[0]) +
+                       (this._m4storage[6] * arg[1]) +
+                       (this._m4storage[10] * arg[2]) +
+                       this._m4storage[14];
+            float w_ = 1.0f /
+                       ((this._m4storage[3] * arg[0]) +
+                        (this._m4storage[7] * arg[1]) +
+                        (this._m4storage[11] * arg[2]) +
+                        this._m4storage[15]);
+            arg[0] = x_ * w_;
+            arg[1] = y_ * w_;
+            arg[2] = z_ * w_;
+            return arg;
+        }
+
+        public void translate(float tx, float ty = 0, float tz = 0, float tw = 1) {
+            float t1 = this._m4storage[0] * tx +
+                       this._m4storage[4] * ty +
+                       this._m4storage[8] * tz +
+                       this._m4storage[12] * tw;
+            float t2 = this._m4storage[1] * tx +
+                       this._m4storage[5] * ty +
+                       this._m4storage[9] * tz +
+                       this._m4storage[13] * tw;
+            float t3 = this._m4storage[2] * tx +
+                       this._m4storage[6] * ty +
+                       this._m4storage[10] * tz +
+                       this._m4storage[14] * tw;
+            float t4 = this._m4storage[3] * tx +
+                       this._m4storage[7] * ty +
+                       this._m4storage[11] * tz +
+                       this._m4storage[15] * tw;
+            this._m4storage[12] = t1;
+            this._m4storage[13] = t2;
+            this._m4storage[14] = t3;
+            this._m4storage[15] = t4;
+        }
+
+        public Matrix4 rotationX(float radians) {
+            this._m4storage[15] = 1.0f;
+            this.setRotationX(radians);
+            return this;
+        }
+
+        public Matrix4 rotationY(float radians) {
+            this._m4storage[15] = 1.0f;
+            this.setRotationY(radians);
+            return this;
+        }
+
+        public Matrix4 rotationZ(float radians) {
+            this._m4storage[15] = 1.0f;
+            this.setRotationZ(radians);
+            return this;
+        }
+        
+        public Matrix4 rotationZ(float radians, float px, float py) {
+            this._m4storage[15] = 1.0f;
+            this.setRotationZ(radians, px, py);
+            return this;
+        }
+
+        public Matrix4 diagonal3Values(float x, float y, float z) {
+            this._m4storage[15] = 1;
+            this._m4storage[10] = z;
+            this._m4storage[5] = y;
+            this._m4storage[0] = x;
+            return this;
+        }
+
+        public void scale(float sx, float sy, float sz, float sw = 1) {
+            this._m4storage[0] *= sx;
+            this._m4storage[1] *= sx;
+            this._m4storage[2] *= sx;
+            this._m4storage[3] *= sx;
+            this._m4storage[4] *= sy;
+            this._m4storage[5] *= sy;
+            this._m4storage[6] *= sy;
+            this._m4storage[7] *= sy;
+            this._m4storage[8] *= sz;
+            this._m4storage[9] *= sz;
+            this._m4storage[10] *= sz;
+            this._m4storage[11] *= sz;
+            this._m4storage[12] *= sw;
+            this._m4storage[13] *= sw;
+            this._m4storage[14] *= sw;
+            this._m4storage[15] *= sw;
+        }
+        
+        public void scale(Vector3 s) {
+            float sx = s.x;
+            float sy = s.y;
+            float sz = s.z;
+            float sw = 1;
+            this._m4storage[0] *= sx;
+            this._m4storage[1] *= sx;
+            this._m4storage[2] *= sx;
+            this._m4storage[3] *= sx;
+            this._m4storage[4] *= sy;
+            this._m4storage[5] *= sy;
+            this._m4storage[6] *= sy;
+            this._m4storage[7] *= sy;
+            this._m4storage[8] *= sz;
+            this._m4storage[9] *= sz;
+            this._m4storage[10] *= sz;
+            this._m4storage[11] *= sz;
+            this._m4storage[12] *= sw;
+            this._m4storage[13] *= sw;
+            this._m4storage[14] *= sw;
+            this._m4storage[15] *= sw;
+        }
+
+        Matrix4 scaled(float sx, float sy, float sz, float sw = 1) {
+            var result = this.clone();
+            result.scale(sx, sy, sz, sw);
+            return result;
+        }
+
+        public Matrix4 translationValues(float x, float y, float z) {
+            this.identity();
+            this.setTranslationRaw(x, y, z);
+            return this;
+        }
+
+        public void rotateX(float angle) {
+            float cosAngle = Mathf.Cos(angle);
+            float sinAngle = Mathf.Sin(angle);
+            float t1 = this._m4storage[4] * cosAngle + this._m4storage[8] * sinAngle;
+            float t2 = this._m4storage[5] * cosAngle + this._m4storage[9] * sinAngle;
+            float t3 = this._m4storage[6] * cosAngle + this._m4storage[10] * sinAngle;
+            float t4 = this._m4storage[7] * cosAngle + this._m4storage[11] * sinAngle;
+            float t5 = this._m4storage[4] * -sinAngle + this._m4storage[8] * cosAngle;
+            float t6 = this._m4storage[5] * -sinAngle + this._m4storage[9] * cosAngle;
+            float t7 = this._m4storage[6] * -sinAngle + this._m4storage[10] * cosAngle;
+            float t8 = this._m4storage[7] * -sinAngle + this._m4storage[11] * cosAngle;
+            this._m4storage[4] = t1;
+            this._m4storage[5] = t2;
+            this._m4storage[6] = t3;
+            this._m4storage[7] = t4;
+            this._m4storage[8] = t5;
+            this._m4storage[9] = t6;
+            this._m4storage[10] = t7;
+            this._m4storage[11] = t8;
+        }
+
+        public void rotateY(float angle) {
+            float cosAngle = Mathf.Cos(angle);
+            float sinAngle = Mathf.Sin(angle);
+            float t1 = this._m4storage[0] * cosAngle + this._m4storage[8] * -sinAngle;
+            float t2 = this._m4storage[1] * cosAngle + this._m4storage[9] * -sinAngle;
+            float t3 = this._m4storage[2] * cosAngle + this._m4storage[10] * -sinAngle;
+            float t4 = this._m4storage[3] * cosAngle + this._m4storage[11] * -sinAngle;
+            float t5 = this._m4storage[0] * sinAngle + this._m4storage[8] * cosAngle;
+            float t6 = this._m4storage[1] * sinAngle + this._m4storage[9] * cosAngle;
+            float t7 = this._m4storage[2] * sinAngle + this._m4storage[10] * cosAngle;
+            float t8 = this._m4storage[3] * sinAngle + this._m4storage[11] * cosAngle;
+            this._m4storage[0] = t1;
+            this._m4storage[1] = t2;
+            this._m4storage[2] = t3;
+            this._m4storage[3] = t4;
+            this._m4storage[8] = t5;
+            this._m4storage[9] = t6;
+            this._m4storage[10] = t7;
+            this._m4storage[11] = t8;
+        }
+
+        public void rotateZ(float angle) {
+            float cosAngle = Mathf.Cos(angle);
+            float sinAngle = Mathf.Sin(angle);
+            float t1 = this._m4storage[0] * cosAngle + this._m4storage[4] * sinAngle;
+            float t2 = this._m4storage[1] * cosAngle + this._m4storage[5] * sinAngle;
+            float t3 = this._m4storage[2] * cosAngle + this._m4storage[6] * sinAngle;
+            float t4 = this._m4storage[3] * cosAngle + this._m4storage[7] * sinAngle;
+            float t5 = this._m4storage[0] * -sinAngle + this._m4storage[4] * cosAngle;
+            float t6 = this._m4storage[1] * -sinAngle + this._m4storage[5] * cosAngle;
+            float t7 = this._m4storage[2] * -sinAngle + this._m4storage[6] * cosAngle;
+            float t8 = this._m4storage[3] * -sinAngle + this._m4storage[7] * cosAngle;
+            this._m4storage[0] = t1;
+            this._m4storage[1] = t2;
+            this._m4storage[2] = t3;
+            this._m4storage[3] = t4;
+            this._m4storage[4] = t5;
+            this._m4storage[5] = t6;
+            this._m4storage[6] = t7;
+            this._m4storage[7] = t8;
+        }
+
+        public void multiply(Matrix4 arg) {
+            float m00 = this._m4storage[0];
+            float m01 = this._m4storage[4];
+            float m02 = this._m4storage[8];
+            float m03 = this._m4storage[12];
+            float m10 = this._m4storage[1];
+            float m11 = this._m4storage[5];
+            float m12 = this._m4storage[9];
+            float m13 = this._m4storage[13];
+            float m20 = this._m4storage[2];
+            float m21 = this._m4storage[6];
+            float m22 = this._m4storage[10];
+            float m23 = this._m4storage[14];
+            float m30 = this._m4storage[3];
+            float m31 = this._m4storage[7];
+            float m32 = this._m4storage[11];
+            float m33 = this._m4storage[15];
+            float[] argStorage = arg._m4storage;
+            float n00 = argStorage[0];
+            float n01 = argStorage[4];
+            float n02 = argStorage[8];
+            float n03 = argStorage[12];
+            float n10 = argStorage[1];
+            float n11 = argStorage[5];
+            float n12 = argStorage[9];
+            float n13 = argStorage[13];
+            float n20 = argStorage[2];
+            float n21 = argStorage[6];
+            float n22 = argStorage[10];
+            float n23 = argStorage[14];
+            float n30 = argStorage[3];
+            float n31 = argStorage[7];
+            float n32 = argStorage[11];
+            float n33 = argStorage[15];
+            this._m4storage[0] = (m00 * n00) + (m01 * n10) + (m02 * n20) + (m03 * n30);
+            this._m4storage[4] = (m00 * n01) + (m01 * n11) + (m02 * n21) + (m03 * n31);
+            this._m4storage[8] = (m00 * n02) + (m01 * n12) + (m02 * n22) + (m03 * n32);
+            this._m4storage[12] = (m00 * n03) + (m01 * n13) + (m02 * n23) + (m03 * n33);
+            this._m4storage[1] = (m10 * n00) + (m11 * n10) + (m12 * n20) + (m13 * n30);
+            this._m4storage[5] = (m10 * n01) + (m11 * n11) + (m12 * n21) + (m13 * n31);
+            this._m4storage[9] = (m10 * n02) + (m11 * n12) + (m12 * n22) + (m13 * n32);
+            this._m4storage[13] = (m10 * n03) + (m11 * n13) + (m12 * n23) + (m13 * n33);
+            this._m4storage[2] = (m20 * n00) + (m21 * n10) + (m22 * n20) + (m23 * n30);
+            this._m4storage[6] = (m20 * n01) + (m21 * n11) + (m22 * n21) + (m23 * n31);
+            this._m4storage[10] = (m20 * n02) + (m21 * n12) + (m22 * n22) + (m23 * n32);
+            this._m4storage[14] = (m20 * n03) + (m21 * n13) + (m22 * n23) + (m23 * n33);
+            this._m4storage[3] = (m30 * n00) + (m31 * n10) + (m32 * n20) + (m33 * n30);
+            this._m4storage[7] = (m30 * n01) + (m31 * n11) + (m32 * n21) + (m33 * n31);
+            this._m4storage[11] = (m30 * n02) + (m31 * n12) + (m32 * n22) + (m33 * n32);
+            this._m4storage[15] = (m30 * n03) + (m31 * n13) + (m32 * n23) + (m33 * n33);
+        }
+
+        public void decompose(ref Vector3 translation, ref Quaternion rotation, ref Vector3 scale) {
+            Vector3 v = Vector3.zero;
+
+            v.Set(this._m4storage[0], this._m4storage[1], this._m4storage[2]);
+            float sx = v.sqrMagnitude;
+
+            v.Set(this._m4storage[4], this._m4storage[5], this._m4storage[6]);
+            float sy = v.sqrMagnitude;
+
+            v.Set(this._m4storage[8], this._m4storage[9], this._m4storage[10]);
+            float sz = v.sqrMagnitude;
+
+            if (this.determinant() < 0) {
+                sx = -sx;
+            }
+
+            translation[0] = this._m4storage[12];
+            translation[1] = this._m4storage[13];
+            translation[2] = this._m4storage[14];
+
+            float invSX = 1.0f / sx;
+            float invSY = 1.0f / sy;
+            float invSZ = 1.0f / sz;
+
+            Matrix4 m = new Matrix4().copy(this);
+            m._m4storage[0] *= invSX;
+            m._m4storage[1] *= invSX;
+            m._m4storage[2] *= invSX;
+            m._m4storage[4] *= invSY;
+            m._m4storage[5] *= invSY;
+            m._m4storage[6] *= invSY;
+            m._m4storage[8] *= invSZ;
+            m._m4storage[9] *= invSZ;
+            m._m4storage[10] *= invSZ;
+
+            m.QuaternionFromMatrix(ref rotation);
+
+            scale[0] = sx;
+            scale[1] = sy;
+            scale[2] = sz;
+        }
+
+        void setTranslationRaw(float x, float y, float z) {
+            this._m4storage[14] = z;
+            this._m4storage[13] = y;
+            this._m4storage[12] = x;
+        }
+
+        void setRotationX(float radians) {
+            float c = Mathf.Cos(radians);
+            float s = Mathf.Sin(radians);
+            this._m4storage[0] = 1.0f;
+            this._m4storage[1] = 0;
+            this._m4storage[2] = 0;
+            this._m4storage[4] = 0;
+            this._m4storage[5] = c;
+            this._m4storage[6] = s;
+            this._m4storage[8] = 0;
+            this._m4storage[9] = -s;
+            this._m4storage[10] = c;
+            this._m4storage[3] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[11] = 0;
+        }
+
+        void setRotationY(float radians) {
+            float c = Mathf.Cos(radians);
+            float s = Mathf.Sin(radians);
+            this._m4storage[0] = c;
+            this._m4storage[1] = 0;
+            this._m4storage[2] = -s;
+            this._m4storage[4] = 0;
+            this._m4storage[5] = 1.0f;
+            this._m4storage[6] = 0;
+            this._m4storage[8] = s;
+            this._m4storage[9] = 0;
+            this._m4storage[10] = c;
+            this._m4storage[3] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[11] = 0;
+        }
+
+        void setRotationZ(float radians) {
+            float c = Mathf.Cos(radians);
+            float s = Mathf.Sin(radians);
+            this._m4storage[0] = c;
+            this._m4storage[1] = s;
+            this._m4storage[2] = 0;
+            this._m4storage[4] = -s;
+            this._m4storage[5] = c;
+            this._m4storage[6] = 0;
+            this._m4storage[8] = 0;
+            this._m4storage[9] = 0;
+            this._m4storage[10] = 1.0f;
+            this._m4storage[3] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[11] = 0;
+        }
+        
+        void setRotationZ(float radians, float px, float py) {
+            float c = Mathf.Cos(radians);
+            float s = Mathf.Sin(radians);
+            this._m4storage[0] = c;
+            this._m4storage[1] = s;
+            this._m4storage[2] = 0;
+            this._m4storage[4] = -s;
+            this._m4storage[5] = c;
+            this._m4storage[6] = 0;
+            this._m4storage[8] = 0;
+            this._m4storage[9] = 0;
+            this._m4storage[10] = 1.0f;
+            this._m4storage[3] = 0;
+            this._m4storage[7] = 0;
+            this._m4storage[11] = 0;
+            this._m4storage[12] = s * py + (1 - c) * px;
+            this._m4storage[13] = -s * px + (1 - c) * py;
+        }
+
+        public float invert() => this.copyInverse(this);
+
+        float copyInverse(Matrix4 arg) {
+            float a00 = arg[0];
+            float a01 = arg[1];
+            float a02 = arg[2];
+            float a03 = arg[3];
+            float a10 = arg[4];
+            float a11 = arg[5];
+            float a12 = arg[6];
+            float a13 = arg[7];
+            float a20 = arg[8];
+            float a21 = arg[9];
+            float a22 = arg[10];
+            float a23 = arg[11];
+            float a30 = arg[12];
+            float a31 = arg[13];
+            float a32 = arg[14];
+            float a33 = arg[15];
+            float b00 = a00 * a11 - a01 * a10;
+            float b01 = a00 * a12 - a02 * a10;
+            float b02 = a00 * a13 - a03 * a10;
+            float b03 = a01 * a12 - a02 * a11;
+            float b04 = a01 * a13 - a03 * a11;
+            float b05 = a02 * a13 - a03 * a12;
+            float b06 = a20 * a31 - a21 * a30;
+            float b07 = a20 * a32 - a22 * a30;
+            float b08 = a20 * a33 - a23 * a30;
+            float b09 = a21 * a32 - a22 * a31;
+            float b10 = a21 * a33 - a23 * a31;
+            float b11 = a22 * a33 - a23 * a32;
+            float det =
+                (b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06);
+            if (det == 0) {
+                this.setFrom(arg);
+                return 0;
+            }
+
+            float invDet = 1.0f / det;
+            this._m4storage[0] = (a11 * b11 - a12 * b10 + a13 * b09) * invDet;
+            this._m4storage[1] = (-a01 * b11 + a02 * b10 - a03 * b09) * invDet;
+            this._m4storage[2] = (a31 * b05 - a32 * b04 + a33 * b03) * invDet;
+            this._m4storage[3] = (-a21 * b05 + a22 * b04 - a23 * b03) * invDet;
+            this._m4storage[4] = (-a10 * b11 + a12 * b08 - a13 * b07) * invDet;
+            this._m4storage[5] = (a00 * b11 - a02 * b08 + a03 * b07) * invDet;
+            this._m4storage[6] = (-a30 * b05 + a32 * b02 - a33 * b01) * invDet;
+            this._m4storage[7] = (a20 * b05 - a22 * b02 + a23 * b01) * invDet;
+            this._m4storage[8] = (a10 * b10 - a11 * b08 + a13 * b06) * invDet;
+            this._m4storage[9] = (-a00 * b10 + a01 * b08 - a03 * b06) * invDet;
+            this._m4storage[10] = (a30 * b04 - a31 * b02 + a33 * b00) * invDet;
+            this._m4storage[11] = (-a20 * b04 + a21 * b02 - a23 * b00) * invDet;
+            this._m4storage[12] = (-a10 * b09 + a11 * b07 - a12 * b06) * invDet;
+            this._m4storage[13] = (a00 * b09 - a01 * b07 + a02 * b06) * invDet;
+            this._m4storage[14] = (-a30 * b03 + a31 * b01 - a32 * b00) * invDet;
+            this._m4storage[15] = (a20 * b03 - a21 * b01 + a22 * b00) * invDet;
+            return det;
+        }
+
+        public int index(int row, int col) => (col * 4) + row;
+
+        public float entry(int row, int col) {
+            D.assert((row >= 0) && (row < this.dimension));
+            D.assert((col >= 0) && (col < this.dimension));
+
+            return this._m4storage[this.index(row, col)];
+        }
+
+        public float this[int index] {
+            get {
+                D.assert((uint) index < 16);
+                return this._m4storage[index];
+            }
+
+            set {
+                D.assert((uint) index < 16);
+                this._m4storage[index] = value;
+            }
+        }
+
+        public bool Equals(Matrix4 other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return (this._m4storage[0] == other._m4storage[0]) &&
+                   (this._m4storage[1] == other._m4storage[1]) &&
+                   (this._m4storage[2] == other._m4storage[2]) &&
+                   (this._m4storage[3] == other._m4storage[3]) &&
+                   (this._m4storage[4] == other._m4storage[4]) &&
+                   (this._m4storage[5] == other._m4storage[5]) &&
+                   (this._m4storage[6] == other._m4storage[6]) &&
+                   (this._m4storage[7] == other._m4storage[7]) &&
+                   (this._m4storage[8] == other._m4storage[8]) &&
+                   (this._m4storage[9] == other._m4storage[9]) &&
+                   (this._m4storage[10] == other._m4storage[10]) &&
+                   (this._m4storage[11] == other._m4storage[11]) &&
+                   (this._m4storage[12] == other._m4storage[12]) &&
+                   (this._m4storage[13] == other._m4storage[13]) &&
+                   (this._m4storage[14] == other._m4storage[14]) &&
+                   (this._m4storage[15] == other._m4storage[15]);
+        }
+
+        public override bool Equals(object obj) {
+            if (ReferenceEquals(null, obj)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, obj)) {
+                return true;
+            }
+
+            if (obj.GetType() != this.GetType()) {
+                return false;
+            }
+
+            return this.Equals((Matrix4) obj);
+        }
+
+        public override int GetHashCode() {
+            return (this._m4storage != null ? this._m4storage.GetHashCode() : 0);
+        }
+    }
+}

com.unity.uiwidgets/Runtime/ui/Matrix4.cs.meta

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