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using System;
using UnityEngine;
using UnityEngine.Experimental.Rendering;
using UnityEngine.Experimental.Rendering.HDPipeline;
namespace UnityEditor.Experimental.Rendering.HDPipeline
{
// A Material can be authored from the shader graph or by hand. When written by hand we need to provide an inspector.
// Such a Material will share some properties between it various variant (shader graph variant or hand authored variant).
// This is the purpose of BaseLitGUI. It contain all properties that are common to all Material based on Lit template.
// For the default hand written Lit material see LitUI.cs that contain specific properties for our default implementation.
public abstract class BaseLitGUI : BaseUnlitGUI
{
protected static class StylesBaseLit
{
public static GUIContent doubleSidedNormalModeText = new GUIContent("Normal mode", "This will modify the normal base on the selected mode. Mirror: Mirror the normal with vertex normal plane, Flip: Flip the normal");
public static GUIContent depthOffsetEnableText = new GUIContent("Enable Depth Offset", "EnableDepthOffset on this shader (Use with heightmap)");
// Displacement mapping (POM, tessellation, per vertex)
//public static GUIContent enablePerPixelDisplacementText = new GUIContent("Enable Per Pixel Displacement", "");
public static GUIContent displacementModeText = new GUIContent("Displacement mode", "Apply heightmap displacement to the selected element: Vertex, pixel or tessellated vertex. Pixel displacement must be use with flat surfaces, it is an expensive features and typical usage is paved road.");
public static GUIContent lockWithObjectScaleText = new GUIContent("Lock with object scale", "Displacement mapping will take the absolute value of the scale of the object into account.");
public static GUIContent lockWithTilingRateText = new GUIContent("Lock with height map tiling rate", "Displacement mapping will take the absolute value of the tiling rate of the height map into account.");
// Material ID
public static GUIContent materialIDText = new GUIContent("Material type", "Select a material feature to enable on top of regular material");
public static GUIContent transmissionEnableText = new GUIContent("Enable Transmission", "Enable Transmission for getting back lighting");
// Per pixel displacement
public static GUIContent ppdMinSamplesText = new GUIContent("Minimum steps", "Minimum steps (texture sample) to use with per pixel displacement mapping");
public static GUIContent ppdMaxSamplesText = new GUIContent("Maximum steps", "Maximum steps (texture sample) to use with per pixel displacement mapping");
public static GUIContent ppdLodThresholdText = new GUIContent("Fading mip level start", "Starting heightmap mipmap lod number where the parallax occlusion mapping effect start to disappear");
public static GUIContent ppdPrimitiveLength = new GUIContent("Primitive length", "Dimensions of the primitive (with the scale of 1) to which the per-pixel displacement mapping is being applied. For example, the standard quad is 1 x 1 meter, while the standard plane is 10 x 10 meters.");
public static GUIContent ppdPrimitiveWidth = new GUIContent("Primitive width", "Dimensions of the primitive (with the scale of 1) to which the per-pixel displacement mapping is being applied. For example, the standard quad is 1 x 1 meter, while the standard plane is 10 x 10 meters.");
// Tessellation
public static string tessellationModeStr = "Tessellation Mode";
public static readonly string[] tessellationModeNames = Enum.GetNames(typeof(TessellationMode));
public static GUIContent tessellationText = new GUIContent("Tessellation options", "Tessellation options");
public static GUIContent tessellationFactorText = new GUIContent("Tessellation factor", "This value is the tessellation factor use for tessellation, higher mean more tessellated. Above 15 is costly. Maximum tessellation factor is 15 on XBone / PS4");
public static GUIContent tessellationFactorMinDistanceText = new GUIContent("Start fade distance", "Distance (in unity unit) at which the tessellation start to fade out. Must be inferior at Max distance");
public static GUIContent tessellationFactorMaxDistanceText = new GUIContent("End fade distance", "Maximum distance (in unity unit) to the camera where triangle are tessellated");
public static GUIContent tessellationFactorTriangleSizeText = new GUIContent("Triangle size", "Desired screen space sized of triangle (in pixel). Smaller value mean smaller triangle.");
public static GUIContent tessellationShapeFactorText = new GUIContent("Shape factor", "Strength of Phong tessellation shape (lerp factor)");
public static GUIContent tessellationBackFaceCullEpsilonText = new GUIContent("Triangle culling Epsilon", "If -1.0 back face culling is enabled for tessellation, higher number mean more aggressive culling and better performance");
// Vertex animation
public static string vertexAnimation = "Vertex animation";
// Wind
public static GUIContent windText = new GUIContent("Enable Wind");
public static GUIContent windInitialBendText = new GUIContent("Initial Bend");
public static GUIContent windStiffnessText = new GUIContent("Stiffness");
public static GUIContent windDragText = new GUIContent("Drag");
public static GUIContent windShiverDragText = new GUIContent("Shiver Drag");
public static GUIContent windShiverDirectionalityText = new GUIContent("Shiver Directionality");
public static GUIContent supportDBufferText = new GUIContent("Enable Decal", "Allow to specify if the material can receive decal or not");
public static GUIContent enableGeometricSpecularAAText = new GUIContent("Enable geometric specular AA", "This reduce specular aliasing on highly dense mesh (Particularly useful when they don't use normal map)");
public static GUIContent specularAAScreenSpaceVarianceText = new GUIContent("Screen space variance", "Allow to control the strength of the specular AA reduction. Higher mean more blurry result and less aliasing");
public static GUIContent specularAAThresholdText = new GUIContent("Threshold", "Allow to limit the effect of specular AA reduction. 0 mean don't apply reduction, higher value mean allow higher reduction");
}
public enum DoubleSidedNormalMode
{
Flip,
Mirror,
None
}
public enum TessellationMode
{
None,
Phong
}
public enum DisplacementMode
{
None,
Vertex,
Pixel,
Tessellation
}
public enum MaterialId
{
LitSSS = 0,
LitStandard = 1,
LitAniso = 2,
LitIridescence = 3,
LitSpecular = 4,
LitTranslucent = 5
};
public enum HeightmapParametrization
{
MinMax = 0,
Amplitude = 1
}
protected MaterialProperty doubleSidedNormalMode = null;
protected const string kDoubleSidedNormalMode = "_DoubleSidedNormalMode";
protected MaterialProperty depthOffsetEnable = null;
protected const string kDepthOffsetEnable = "_DepthOffsetEnable";
// Properties
// Material ID
protected MaterialProperty materialID = null;
protected const string kMaterialID = "_MaterialID";
protected MaterialProperty transmissionEnable = null;
protected const string kTransmissionEnable = "_TransmissionEnable";
protected const string kStencilRef = "_StencilRef";
protected const string kStencilWriteMask = "_StencilWriteMask";
protected const string kStencilRefMV = "_StencilRefMV";
protected const string kStencilWriteMaskMV = "_StencilWriteMaskMV";
protected MaterialProperty displacementMode = null;
protected const string kDisplacementMode = "_DisplacementMode";
protected MaterialProperty displacementLockObjectScale = null;
protected const string kDisplacementLockObjectScale = "_DisplacementLockObjectScale";
protected MaterialProperty displacementLockTilingScale = null;
protected const string kDisplacementLockTilingScale = "_DisplacementLockTilingScale";
// Per pixel displacement params
protected MaterialProperty ppdMinSamples = null;
protected const string kPpdMinSamples = "_PPDMinSamples";
protected MaterialProperty ppdMaxSamples = null;
protected const string kPpdMaxSamples = "_PPDMaxSamples";
protected MaterialProperty ppdLodThreshold = null;
protected const string kPpdLodThreshold = "_PPDLodThreshold";
protected MaterialProperty ppdPrimitiveLength = null;
protected const string kPpdPrimitiveLength = "_PPDPrimitiveLength";
protected MaterialProperty ppdPrimitiveWidth = null;
protected const string kPpdPrimitiveWidth = "_PPDPrimitiveWidth";
protected MaterialProperty invPrimScale = null;
protected const string kInvPrimScale = "_InvPrimScale";
// Wind
protected MaterialProperty windEnable = null;
protected const string kWindEnabled = "_EnableWind";
protected MaterialProperty windInitialBend = null;
protected const string kWindInitialBend = "_InitialBend";
protected MaterialProperty windStiffness = null;
protected const string kWindStiffness = "_Stiffness";
protected MaterialProperty windDrag = null;
protected const string kWindDrag = "_Drag";
protected MaterialProperty windShiverDrag = null;
protected const string kWindShiverDrag = "_ShiverDrag";
protected MaterialProperty windShiverDirectionality = null;
protected const string kWindShiverDirectionality = "_ShiverDirectionality";
// tessellation params
protected MaterialProperty tessellationMode = null;
protected const string kTessellationMode = "_TessellationMode";
protected MaterialProperty tessellationFactor = null;
protected const string kTessellationFactor = "_TessellationFactor";
protected MaterialProperty tessellationFactorMinDistance = null;
protected const string kTessellationFactorMinDistance = "_TessellationFactorMinDistance";
protected MaterialProperty tessellationFactorMaxDistance = null;
protected const string kTessellationFactorMaxDistance = "_TessellationFactorMaxDistance";
protected MaterialProperty tessellationFactorTriangleSize = null;
protected const string kTessellationFactorTriangleSize = "_TessellationFactorTriangleSize";
protected MaterialProperty tessellationShapeFactor = null;
protected const string kTessellationShapeFactor = "_TessellationShapeFactor";
protected MaterialProperty tessellationBackFaceCullEpsilon = null;
protected const string kTessellationBackFaceCullEpsilon = "_TessellationBackFaceCullEpsilon";
// Decal
protected MaterialProperty supportDBuffer = null;
protected const string kSupportDBuffer = "_SupportDBuffer";
protected MaterialProperty enableGeometricSpecularAA = null;
protected const string kEnableGeometricSpecularAA = "_EnableGeometricSpecularAA";
protected MaterialProperty specularAAScreenSpaceVariance = null;
protected const string kSpecularAAScreenSpaceVariance = "_SpecularAAScreenSpaceVariance";
protected MaterialProperty specularAAThreshold = null;
protected const string kSpecularAAThreshold = "_SpecularAAThreshold";
protected override void FindBaseMaterialProperties(MaterialProperty[] props)
{
base.FindBaseMaterialProperties(props);
doubleSidedNormalMode = FindProperty(kDoubleSidedNormalMode, props);
depthOffsetEnable = FindProperty(kDepthOffsetEnable, props);
// MaterialID
materialID = FindProperty(kMaterialID, props);
transmissionEnable = FindProperty(kTransmissionEnable, props);
displacementMode = FindProperty(kDisplacementMode, props);
displacementLockObjectScale = FindProperty(kDisplacementLockObjectScale, props);
displacementLockTilingScale = FindProperty(kDisplacementLockTilingScale, props);
// Per pixel displacement
ppdMinSamples = FindProperty(kPpdMinSamples, props);
ppdMaxSamples = FindProperty(kPpdMaxSamples, props);
ppdLodThreshold = FindProperty(kPpdLodThreshold, props);
ppdPrimitiveLength = FindProperty(kPpdPrimitiveLength, props);
ppdPrimitiveWidth = FindProperty(kPpdPrimitiveWidth, props);
invPrimScale = FindProperty(kInvPrimScale, props);
// tessellation specific, silent if not found
tessellationMode = FindProperty(kTessellationMode, props, false);
tessellationFactor = FindProperty(kTessellationFactor, props, false);
tessellationFactorMinDistance = FindProperty(kTessellationFactorMinDistance, props, false);
tessellationFactorMaxDistance = FindProperty(kTessellationFactorMaxDistance, props, false);
tessellationFactorTriangleSize = FindProperty(kTessellationFactorTriangleSize, props, false);
tessellationShapeFactor = FindProperty(kTessellationShapeFactor, props, false);
tessellationBackFaceCullEpsilon = FindProperty(kTessellationBackFaceCullEpsilon, props, false);
// Wind
windEnable = FindProperty(kWindEnabled, props);
windInitialBend = FindProperty(kWindInitialBend, props);
windStiffness = FindProperty(kWindStiffness, props);
windDrag = FindProperty(kWindDrag, props);
windShiverDrag = FindProperty(kWindShiverDrag, props);
windShiverDirectionality = FindProperty(kWindShiverDirectionality, props);
// Decal
supportDBuffer = FindProperty(kSupportDBuffer, props);
// specular AA
enableGeometricSpecularAA = FindProperty(kEnableGeometricSpecularAA, props, false);
specularAAScreenSpaceVariance = FindProperty(kSpecularAAScreenSpaceVariance, props, false);
specularAAThreshold = FindProperty(kSpecularAAThreshold, props, false);
}
void TessellationModePopup()
{
EditorGUI.showMixedValue = tessellationMode.hasMixedValue;
var mode = (TessellationMode)tessellationMode.floatValue;
EditorGUI.BeginChangeCheck();
mode = (TessellationMode)EditorGUILayout.Popup(StylesBaseLit.tessellationModeStr, (int)mode, StylesBaseLit.tessellationModeNames);
if (EditorGUI.EndChangeCheck())
{
m_MaterialEditor.RegisterPropertyChangeUndo("Tessellation Mode");
tessellationMode.floatValue = (float)mode;
}
EditorGUI.showMixedValue = false;
}
protected abstract void UpdateDisplacement();
protected override void BaseMaterialPropertiesGUI()
{
base.BaseMaterialPropertiesGUI();
EditorGUI.indentLevel++;
// This follow double sided option
if (doubleSidedEnable.floatValue > 0.0f)
{
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(doubleSidedNormalMode, StylesBaseLit.doubleSidedNormalModeText);
EditorGUI.indentLevel--;
}
m_MaterialEditor.ShaderProperty(materialID, StylesBaseLit.materialIDText);
if ((int)materialID.floatValue == (int)BaseLitGUI.MaterialId.LitSSS)
{
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(transmissionEnable, StylesBaseLit.transmissionEnableText);
EditorGUI.indentLevel--;
}
m_MaterialEditor.ShaderProperty(supportDBuffer, StylesBaseLit.supportDBufferText);
m_MaterialEditor.ShaderProperty(enableGeometricSpecularAA, StylesBaseLit.enableGeometricSpecularAAText);
if (enableGeometricSpecularAA.floatValue > 0.0)
{
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(specularAAScreenSpaceVariance, StylesBaseLit.specularAAScreenSpaceVarianceText);
m_MaterialEditor.ShaderProperty(specularAAThreshold, StylesBaseLit.specularAAThresholdText);
EditorGUI.indentLevel--;
}
m_MaterialEditor.ShaderProperty(enableMotionVectorForVertexAnimation, StylesBaseUnlit.enableMotionVectorForVertexAnimationText);
EditorGUI.BeginChangeCheck();
m_MaterialEditor.ShaderProperty(displacementMode, StylesBaseLit.displacementModeText);
if (EditorGUI.EndChangeCheck())
{
UpdateDisplacement();
}
if ((DisplacementMode)displacementMode.floatValue != DisplacementMode.None)
{
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(displacementLockObjectScale, StylesBaseLit.lockWithObjectScaleText);
m_MaterialEditor.ShaderProperty(displacementLockTilingScale, StylesBaseLit.lockWithTilingRateText);
EditorGUI.indentLevel--;
}
if ((DisplacementMode)displacementMode.floatValue == DisplacementMode.Pixel)
{
EditorGUILayout.Space();
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(ppdMinSamples, StylesBaseLit.ppdMinSamplesText);
m_MaterialEditor.ShaderProperty(ppdMaxSamples, StylesBaseLit.ppdMaxSamplesText);
ppdMinSamples.floatValue = Mathf.Min(ppdMinSamples.floatValue, ppdMaxSamples.floatValue);
m_MaterialEditor.ShaderProperty(ppdLodThreshold, StylesBaseLit.ppdLodThresholdText);
m_MaterialEditor.ShaderProperty(ppdPrimitiveLength, StylesBaseLit.ppdPrimitiveLength);
ppdPrimitiveLength.floatValue = Mathf.Max(0.01f, ppdPrimitiveLength.floatValue);
m_MaterialEditor.ShaderProperty(ppdPrimitiveWidth, StylesBaseLit.ppdPrimitiveWidth);
ppdPrimitiveWidth.floatValue = Mathf.Max(0.01f, ppdPrimitiveWidth.floatValue);
invPrimScale.vectorValue = new Vector4(1.0f / ppdPrimitiveLength.floatValue, 1.0f / ppdPrimitiveWidth.floatValue); // Precompute
m_MaterialEditor.ShaderProperty(depthOffsetEnable, StylesBaseLit.depthOffsetEnableText);
EditorGUI.indentLevel--;
}
EditorGUI.indentLevel--;
// Display tessellation option if it exist
if (tessellationMode != null)
{
EditorGUILayout.Space();
EditorGUILayout.LabelField(StylesBaseLit.tessellationText, EditorStyles.boldLabel);
EditorGUI.indentLevel++;
TessellationModePopup();
m_MaterialEditor.ShaderProperty(tessellationFactor, StylesBaseLit.tessellationFactorText);
m_MaterialEditor.ShaderProperty(tessellationFactorMinDistance, StylesBaseLit.tessellationFactorMinDistanceText);
m_MaterialEditor.ShaderProperty(tessellationFactorMaxDistance, StylesBaseLit.tessellationFactorMaxDistanceText);
// clamp min distance to be below max distance
tessellationFactorMinDistance.floatValue = Math.Min(tessellationFactorMaxDistance.floatValue, tessellationFactorMinDistance.floatValue);
m_MaterialEditor.ShaderProperty(tessellationFactorTriangleSize, StylesBaseLit.tessellationFactorTriangleSizeText);
if ((TessellationMode)tessellationMode.floatValue == TessellationMode.Phong)
{
m_MaterialEditor.ShaderProperty(tessellationShapeFactor, StylesBaseLit.tessellationShapeFactorText);
}
if (doubleSidedEnable.floatValue == 0.0)
{
m_MaterialEditor.ShaderProperty(tessellationBackFaceCullEpsilon, StylesBaseLit.tessellationBackFaceCullEpsilonText);
}
EditorGUI.indentLevel--;
}
}
protected override void VertexAnimationPropertiesGUI()
{
EditorGUILayout.LabelField(StylesBaseLit.vertexAnimation, EditorStyles.boldLabel);
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(windEnable, StylesBaseLit.windText);
if (!windEnable.hasMixedValue && windEnable.floatValue > 0.0f)
{
EditorGUI.indentLevel++;
m_MaterialEditor.ShaderProperty(windInitialBend, StylesBaseLit.windInitialBendText);
m_MaterialEditor.ShaderProperty(windStiffness, StylesBaseLit.windStiffnessText);
m_MaterialEditor.ShaderProperty(windDrag, StylesBaseLit.windDragText);
m_MaterialEditor.ShaderProperty(windShiverDrag, StylesBaseLit.windShiverDragText);
m_MaterialEditor.ShaderProperty(windShiverDirectionality, StylesBaseLit.windShiverDirectionalityText);
EditorGUI.indentLevel--;
}
EditorGUI.indentLevel--;
}
// All Setup Keyword functions must be static. It allow to create script to automatically update the shaders with a script if code change
static public void SetupBaseLitKeywords(Material material)
{
SetupBaseUnlitKeywords(material);
bool doubleSidedEnable = material.GetFloat(kDoubleSidedEnable) > 0.0f;
if (doubleSidedEnable)
{
DoubleSidedNormalMode doubleSidedNormalMode = (DoubleSidedNormalMode)material.GetFloat(kDoubleSidedNormalMode);
switch (doubleSidedNormalMode)
{
case DoubleSidedNormalMode.Mirror: // Mirror mode (in tangent space)
material.SetVector("_DoubleSidedConstants", new Vector4(1.0f, 1.0f, -1.0f, 0.0f));
break;
case DoubleSidedNormalMode.Flip: // Flip mode (in tangent space)
material.SetVector("_DoubleSidedConstants", new Vector4(-1.0f, -1.0f, -1.0f, 0.0f));
break;
case DoubleSidedNormalMode.None: // None mode (in tangent space)
material.SetVector("_DoubleSidedConstants", new Vector4(1.0f, 1.0f, 1.0f, 0.0f));
break;
}
}
// Set the reference value for the stencil test.
int stencilRef = (int)StencilLightingUsage.RegularLighting;
if ((int)material.GetFloat(kMaterialID) == (int)BaseLitGUI.MaterialId.LitSSS)
{
stencilRef = (int)StencilLightingUsage.SplitLighting;
}
// As we tag both during velocity pass and Gbuffer pass we need a separate state and we need to use the write mask
material.SetInt(kStencilRef, stencilRef);
material.SetInt(kStencilWriteMask, (int)HDRenderPipeline.StencilBitMask.LightingMask);
material.SetInt(kStencilRefMV, (int)HDRenderPipeline.StencilBitMask.ObjectVelocity);
material.SetInt(kStencilWriteMaskMV, (int)HDRenderPipeline.StencilBitMask.ObjectVelocity);
bool enableDisplacement = (DisplacementMode)material.GetFloat(kDisplacementMode) != DisplacementMode.None;
bool enableVertexDisplacement = (DisplacementMode)material.GetFloat(kDisplacementMode) == DisplacementMode.Vertex;
bool enablePixelDisplacement = (DisplacementMode)material.GetFloat(kDisplacementMode) == DisplacementMode.Pixel;
bool enableTessellationDisplacement = ((DisplacementMode)material.GetFloat(kDisplacementMode) == DisplacementMode.Tessellation) && material.HasProperty(kTessellationMode);
CoreUtils.SetKeyword(material, "_VERTEX_DISPLACEMENT", enableVertexDisplacement);
CoreUtils.SetKeyword(material, "_PIXEL_DISPLACEMENT", enablePixelDisplacement);
// Only set if tessellation exist
CoreUtils.SetKeyword(material, "_TESSELLATION_DISPLACEMENT", enableTessellationDisplacement);
bool displacementLockObjectScale = material.GetFloat(kDisplacementLockObjectScale) > 0.0;
bool displacementLockTilingScale = material.GetFloat(kDisplacementLockTilingScale) > 0.0;
// Tessellation reuse vertex flag.
CoreUtils.SetKeyword(material, "_VERTEX_DISPLACEMENT_LOCK_OBJECT_SCALE", displacementLockObjectScale && (enableVertexDisplacement || enableTessellationDisplacement));
CoreUtils.SetKeyword(material, "_PIXEL_DISPLACEMENT_LOCK_OBJECT_SCALE", displacementLockObjectScale && enablePixelDisplacement);
CoreUtils.SetKeyword(material, "_DISPLACEMENT_LOCK_TILING_SCALE", displacementLockTilingScale && enableDisplacement);
bool windEnabled = material.GetFloat(kWindEnabled) > 0.0f;
CoreUtils.SetKeyword(material, "_VERTEX_WIND", windEnabled);
// Depth offset is only enabled if per pixel displacement is
bool depthOffsetEnable = (material.GetFloat(kDepthOffsetEnable) > 0.0f) && enablePixelDisplacement;
CoreUtils.SetKeyword(material, "_DEPTHOFFSET_ON", depthOffsetEnable);
if (material.HasProperty(kTessellationMode))
{
TessellationMode tessMode = (TessellationMode)material.GetFloat(kTessellationMode);
CoreUtils.SetKeyword(material, "_TESSELLATION_PHONG", tessMode == TessellationMode.Phong);
}
SetupMainTexForAlphaTestGI("_BaseColorMap", "_BaseColor", material);
// Use negation so we don't create keyword by default
CoreUtils.SetKeyword(material, "_DISABLE_DBUFFER", material.GetFloat(kSupportDBuffer) == 0.0);
CoreUtils.SetKeyword(material, "_ENABLE_GEOMETRIC_SPECULAR_AA", material.GetFloat(kEnableGeometricSpecularAA) == 1.0);
}
static public void SetupBaseLitMaterialPass(Material material)
{
SetupBaseUnlitMaterialPass(material);
}
}
} // namespace UnityEditor