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790 行
26 KiB
790 行
26 KiB
using System;
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namespace UIWidgets.ui {
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public static class MathUtils {
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public static double clamp(this double value, double min, double max) {
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if (value < min) {
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value = min;
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} else if (value > max) {
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value = max;
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}
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return value;
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}
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public static int clamp(this int value, int min, int max) {
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if (value < min) {
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value = min;
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} else if (value > max) {
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value = max;
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}
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return value;
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}
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public static double abs(this double value) {
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return Math.Abs(value);
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}
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public static int sign(this double value) {
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return Math.Sign(value);
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}
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public static bool isInfinite(this double it) {
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return double.IsInfinity(it);
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}
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public static bool isFinite(this double it) {
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return !double.IsInfinity(it);
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}
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public static bool isNaN(this double it) {
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return double.IsNaN(it);
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}
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public static double lerpDouble(double a, double b, double t) {
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return a + (b - a) * t;
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}
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public static int round(this double value) {
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return (int) Math.Round(value);
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}
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public static int floor(this double value) {
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return (int) Math.Floor(value);
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}
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}
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public abstract class OffsetBase : IEquatable<OffsetBase> {
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protected OffsetBase(double _dx, double _dy) {
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this._dx = _dx;
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this._dy = _dy;
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}
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public readonly double _dx;
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public readonly double _dy;
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public bool isInfinite {
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get { return double.IsInfinity(this._dx) || double.IsInfinity(this._dy); }
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}
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public bool isFinite {
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get { return !double.IsInfinity(this._dx) && !double.IsInfinity(this._dy); }
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}
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public static bool operator <(OffsetBase a, OffsetBase b) {
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return a._dx < b._dx && a._dy < b._dy;
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}
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public static bool operator <=(OffsetBase a, OffsetBase b) {
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return a._dx <= b._dx && a._dy <= b._dy;
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}
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public static bool operator >(OffsetBase a, OffsetBase b) {
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return a._dx > b._dx && a._dy > b._dy;
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}
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public static bool operator >=(OffsetBase a, OffsetBase b) {
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return a._dx >= b._dx && a._dy >= b._dy;
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}
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public static bool operator ==(OffsetBase a, OffsetBase b) {
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return object.Equals(a, b);
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}
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public static bool operator !=(OffsetBase a, OffsetBase b) {
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return !(a == b);
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}
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public bool Equals(OffsetBase other) {
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return this._dx.Equals(other._dx) && this._dy.Equals(other._dy);
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}
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public override bool Equals(object obj) {
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if (object.ReferenceEquals(null, obj)) return false;
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return obj is OffsetBase && this.Equals((OffsetBase) obj);
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}
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public override int GetHashCode() {
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unchecked {
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return (this._dx.GetHashCode() * 397) ^ this._dy.GetHashCode();
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}
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}
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public override string ToString() {
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return this.GetType() + "(" + this._dx.ToString("0.0") + ", " + this._dy.ToString("0.0") + ")";
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}
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}
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public class Offset : OffsetBase, IEquatable<Offset> {
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public Offset(double dx, double dy) : base(dx, dy) {
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}
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public double dx {
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get { return this._dx; }
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}
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public double dy {
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get { return this._dy; }
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}
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public double distance {
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get { return Math.Sqrt(this._dx * this._dx + this._dy * this._dy); }
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}
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public double distanceSquared {
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get { return this._dx * this._dx + this._dy * this._dy; }
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}
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public static readonly Offset zero = new Offset(0.0, 0.0);
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public static readonly Offset infinite = new Offset(double.PositiveInfinity, double.PositiveInfinity);
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public Offset scale(double scaleX, double scaleY) {
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return new Offset(this.dx * scaleX, this.dy * scaleY);
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}
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public Offset translate(double translateX, double translateY) {
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return new Offset(this.dx + translateX, this.dy + translateY);
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}
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public static Offset operator -(Offset a) {
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return new Offset(-a.dx, -a.dy);
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}
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public static Offset operator -(Offset a, Offset b) {
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return new Offset(a.dx - b.dx, a.dy - b.dy);
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}
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public static Offset operator +(Offset a, Offset b) {
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return new Offset(a.dx + b.dx, a.dy + b.dy);
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}
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public static Offset operator *(Offset a, double operand) {
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return new Offset(a.dx * operand, a.dy * operand);
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}
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public static Offset operator /(Offset a, double operand) {
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return new Offset(a.dx / operand, a.dy / operand);
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}
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public static Rect operator &(Offset a, Size other) {
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return Rect.fromLTWH(a.dx, a.dy, other.width, other.height);
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}
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public bool Equals(Offset other) {
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return this._dx.Equals(other._dx) && this._dy.Equals(other._dy);
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}
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public override bool Equals(object obj) {
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if (object.ReferenceEquals(null, obj)) return false;
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return obj is Offset && this.Equals((Offset) obj);
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}
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public override int GetHashCode() {
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return base.GetHashCode();
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}
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public override string ToString() {
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return "Offset(" + this._dx.ToString("0.0") + ", " + this._dy.ToString("0.0") + ")";
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}
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}
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public class Size : OffsetBase, IEquatable<Size> {
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public Size(double width, double height) : base(width, height) {
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}
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public static Size copy(Size source) {
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return new Size(source.width, source.height);
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}
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public static Size square(double dimension) {
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return new Size(dimension, dimension);
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}
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public static Size fromWidth(double width) {
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return new Size(width, double.PositiveInfinity);
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}
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public static Size fromHeight(double height) {
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return new Size(double.PositiveInfinity, height);
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}
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public static Size fromRadius(double radius) {
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return new Size(radius * 2, radius * 2);
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}
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public double width {
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get { return this._dx; }
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}
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public double height {
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get { return this._dy; }
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}
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public static readonly Size zero = new Size(0.0, 0.0);
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public static readonly Size infinite = new Size(double.PositiveInfinity, double.PositiveInfinity);
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public bool isEmpty {
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get { return this.width <= 0.0 || this.height <= 0.0; }
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}
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public static Size operator -(Size a, Offset b) {
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return new Size(a.width - b.dx, a.height - b.dy);
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}
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public static Size operator +(Size a, Offset b) {
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return new Size(a.width + b.dx, a.height + b.dy);
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}
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public static Offset operator -(Size a, Size b) {
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return new Offset(a.width - b.width, a.height - b.height);
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}
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public static Size operator *(Size a, double operand) {
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return new Size(a.width * operand, a.height * operand);
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}
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public static Size operator /(Size a, double operand) {
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return new Size(a.width / operand, a.height / operand);
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}
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public double shortestSide {
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get { return Math.Min(Math.Abs(this.width), Math.Abs(this.height)); }
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}
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public double longestSide {
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get { return Math.Max(Math.Abs(this.width), Math.Abs(this.height)); }
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}
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public bool contains(Offset offset) {
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return offset.dx >= 0.0 && offset.dx < this.width && offset.dy >= 0.0 && offset.dy < this.height;
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}
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public static Size lerp(Size a, Size b, double t) {
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if (a == null && b == null) {
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return null;
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}
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if (a == null) {
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return b * t;
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}
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if (b == null) {
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return a * (1.0 - t);
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}
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return new Size(MathUtils.lerpDouble(a.width, b.width, t), MathUtils.lerpDouble(a.height, b.height, t));
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}
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public bool Equals(Size other) {
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return this._dx.Equals(other._dx) && this._dy.Equals(other._dy);
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}
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public override bool Equals(object obj) {
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if (object.ReferenceEquals(null, obj)) return false;
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return obj is Size && this.Equals((Size) obj);
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}
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public override int GetHashCode() {
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return base.GetHashCode();
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}
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public override string ToString() {
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return "Size(" + this._dx.ToString("0.0") + ", " + this._dy.ToString("0.0") + ")";
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}
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}
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public class Rect : IEquatable<Rect> {
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private Rect(double left, double top, double right, double bottom) {
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this.left = left;
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this.top = top;
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this.right = right;
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this.bottom = bottom;
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}
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public static Rect fromLTRB(double left, double top, double right, double bottom) {
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return new Rect(left, top, right, bottom);
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}
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public static Rect fromLTWH(double left, double top, double width, double height) {
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return new Rect(left, top, left + width, top + height);
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}
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public static Rect fromCircle(Offset offset, double radius) {
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return new Rect(offset.dx - radius, offset.dy - radius, offset.dx + radius, offset.dy + radius);
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}
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public static Rect fromPoints(Offset a, Offset b) {
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return new Rect(
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Math.Min(a.dx, b.dx),
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Math.Min(a.dy, b.dy),
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Math.Max(a.dx, b.dx),
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Math.Max(a.dy, b.dy)
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);
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}
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public readonly double left;
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public readonly double top;
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public readonly double right;
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public readonly double bottom;
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public double width {
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get { return this.right - this.left; }
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}
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public double height {
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get { return this.bottom - this.top; }
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}
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public Size size {
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get { return new Size(this.width, this.height); }
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}
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public static readonly Rect zero = new Rect(0, 0, 0, 0);
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public static readonly Rect infinity = new Rect(double.NegativeInfinity, double.NegativeInfinity,
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double.PositiveInfinity, double.PositiveInfinity);
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public const double _giantScalar = 1.0E+9;
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public static readonly Rect largest =
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Rect.fromLTRB(-Rect._giantScalar, -Rect._giantScalar, Rect._giantScalar, Rect._giantScalar);
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public bool isInfinite {
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get {
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return double.IsInfinity(this.left)
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|| double.IsInfinity(this.top)
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|| double.IsInfinity(this.right)
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|| double.IsInfinity(this.bottom);
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}
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}
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public bool isFinite {
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get { return !this.isInfinite; }
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}
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public bool isEmpty {
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get { return this.left >= this.right || this.top >= this.bottom; }
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}
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public Rect shift(Offset offset) {
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return Rect.fromLTRB(this.left + offset.dx, this.top + offset.dy, this.right + offset.dx,
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this.bottom + offset.dy);
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}
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public Rect translate(double translateX, double translateY) {
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return Rect.fromLTRB(this.left + translateX, this.top + translateY, this.right + translateX,
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this.bottom + translateY);
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}
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public Rect inflate(double delta) {
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return Rect.fromLTRB(this.left - delta, this.top - delta, this.right + delta, this.bottom + delta);
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}
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public Rect deflate(double delta) {
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return this.inflate(-delta);
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}
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public Rect intersect(Rect other) {
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return Rect.fromLTRB(
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Math.Max(this.left, other.left),
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Math.Max(this.top, other.top),
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Math.Min(this.right, other.right),
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Math.Min(this.bottom, other.bottom)
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);
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}
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public Rect expandToInclude(Rect other) {
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return Rect.fromLTRB(
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Math.Min(this.left, other.left),
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Math.Min(this.top, other.top),
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Math.Max(this.right, other.right),
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Math.Max(this.bottom, other.bottom)
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);
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}
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public bool overlaps(Rect other) {
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if (this.right <= other.left || other.right <= this.left) {
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return false;
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}
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if (this.bottom <= other.top || other.bottom <= this.top) {
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return false;
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}
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return true;
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}
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public double shortestSide {
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get { return Math.Min(Math.Abs(this.width), Math.Abs(this.height)); }
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}
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public double longestSide {
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get { return Math.Max(Math.Abs(this.width), Math.Abs(this.height)); }
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}
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public Offset topLeft {
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get { return new Offset(this.left, this.top); }
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}
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public Offset topCenter {
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get { return new Offset(this.left + this.width / 2.0, this.top); }
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}
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public Offset topRight {
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get { return new Offset(this.right, this.top); }
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}
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public Offset centerLeft {
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get { return new Offset(this.left, this.top + this.height / 2.0); }
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}
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public Offset center {
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get { return new Offset(this.left + this.width / 2.0, this.top + this.height / 2.0); }
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}
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public Offset centerRight {
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get { return new Offset(this.right, this.bottom); }
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}
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public Offset bottomLeft {
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get { return new Offset(this.left, this.bottom); }
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}
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public Offset bottomCenter {
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get { return new Offset(this.left + this.width / 2.0, this.bottom); }
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}
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public Offset bottomRight {
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get { return new Offset(this.right, this.bottom); }
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}
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public bool contains(Offset offset) {
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return offset.dx >= this.left && offset.dx < this.right && offset.dy >= this.top && offset.dy < this.bottom;
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}
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public bool contains(Rect rect) {
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return this.contains(rect.topLeft) && this.contains(rect.bottomRight);
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}
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public Rect roundOut() {
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return Rect.fromLTRB(
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Math.Floor(this.left), Math.Floor(this.top),
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Math.Ceiling(this.right), Math.Ceiling(this.bottom));
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}
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public static Rect lerp(Rect a, Rect b, double t) {
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if (a == null && b == null) {
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return null;
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}
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if (a == null) {
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return Rect.fromLTRB(b.left * t, b.top * t, b.right * t, b.bottom * t);
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}
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if (b == null) {
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double k = 1.0 - t;
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return Rect.fromLTRB(a.left * k, a.top * k, a.right * k, a.bottom * k);
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}
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return Rect.fromLTRB(
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MathUtils.lerpDouble(a.left, b.left, t),
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MathUtils.lerpDouble(a.top, b.top, t),
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MathUtils.lerpDouble(a.right, b.right, t),
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MathUtils.lerpDouble(a.bottom, b.bottom, t)
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);
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}
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public bool Equals(Rect other) {
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if (object.ReferenceEquals(null, other)) return false;
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if (object.ReferenceEquals(this, other)) return true;
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return this.left.Equals(other.left) && this.top.Equals(other.top) && this.right.Equals(other.right) &&
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this.bottom.Equals(other.bottom);
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}
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public override bool Equals(object obj) {
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if (object.ReferenceEquals(null, obj)) return false;
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if (object.ReferenceEquals(this, obj)) return true;
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if (obj.GetType() != this.GetType()) return false;
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return this.Equals((Rect) obj);
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}
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public override int GetHashCode() {
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unchecked {
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var hashCode = this.left.GetHashCode();
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hashCode = (hashCode * 397) ^ this.top.GetHashCode();
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hashCode = (hashCode * 397) ^ this.right.GetHashCode();
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hashCode = (hashCode * 397) ^ this.bottom.GetHashCode();
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return hashCode;
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}
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}
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public override String ToString() {
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return "Rect.fromLTRB(" + this.left.ToString("0.0") + ", " + this.top.ToString("0.0") + ", " +
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this.right.ToString("0.0") + ", " + this.bottom.ToString("0.0") + ")";
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}
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}
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public class RRect : IEquatable<RRect> {
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private RRect(double left, double top, double right, double bottom,
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double tlRadius, double trRadius, double brRadius, double blRadius) {
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this.left = left;
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this.top = top;
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this.right = right;
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this.bottom = bottom;
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this.tlRadius = tlRadius;
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this.trRadius = trRadius;
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this.brRadius = brRadius;
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this.blRadius = blRadius;
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}
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public static RRect fromLTRBAndRadius(
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double left, double top, double right, double bottom,
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double radius) {
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return new RRect(left, top, right, bottom,
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radius, radius, radius, radius);
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}
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public static RRect fromRectAndRadius(Rect rect, double radius) {
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return new RRect(rect.left, rect.top, rect.right, rect.bottom,
|
|
radius, radius, radius, radius);
|
|
}
|
|
|
|
public static RRect fromLTRBAndCorners(
|
|
double left, double top, double right, double bottom,
|
|
double topLeft = 0.0, double topRight = 0.0, double bottomRight = 0.0, double bottomLeft = 0.0) {
|
|
return new RRect(left, top, right, bottom,
|
|
topLeft, topRight, bottomRight, bottomLeft);
|
|
}
|
|
|
|
public static RRect fromRectAndCorners(
|
|
Rect rect,
|
|
double topLeft = 0.0, double topRight = 0.0, double bottomRight = 0.0, double bottomLeft = 0.0) {
|
|
return new RRect(rect.left, rect.top, rect.right, rect.bottom,
|
|
topLeft, topRight, bottomRight, bottomLeft);
|
|
}
|
|
|
|
public static readonly RRect zero = new RRect(0, 0, 0, 0, 0, 0, 0, 0);
|
|
|
|
public readonly double left;
|
|
public readonly double top;
|
|
public readonly double right;
|
|
public readonly double bottom;
|
|
|
|
public readonly double tlRadius;
|
|
public readonly double trRadius;
|
|
public readonly double brRadius;
|
|
public readonly double blRadius;
|
|
|
|
public RRect shift(Offset offset) {
|
|
return RRect.fromLTRBAndCorners(
|
|
this.left + offset.dx,
|
|
this.top + offset.dy,
|
|
this.right + offset.dx,
|
|
this.bottom + offset.dy,
|
|
this.tlRadius,
|
|
this.trRadius,
|
|
this.brRadius,
|
|
this.blRadius
|
|
);
|
|
}
|
|
|
|
public RRect inflate(double delta) {
|
|
return RRect.fromLTRBAndCorners(
|
|
this.left - delta,
|
|
this.top - delta,
|
|
this.right + delta,
|
|
this.bottom + delta,
|
|
this.tlRadius + delta,
|
|
this.trRadius + delta,
|
|
this.brRadius + delta,
|
|
this.blRadius + delta
|
|
);
|
|
}
|
|
|
|
public RRect deflate(double delta) {
|
|
return this.inflate(-delta);
|
|
}
|
|
|
|
public double width {
|
|
get { return this.right - this.left; }
|
|
}
|
|
|
|
public double height {
|
|
get { return this.bottom - this.top; }
|
|
}
|
|
|
|
public Rect outerRect {
|
|
get { return Rect.fromLTRB(this.left, this.top, this.right, this.bottom); }
|
|
}
|
|
|
|
public Rect safeInnerRect {
|
|
get {
|
|
const double kInsetFactor = 0.29289321881; // 1-cos(pi/4)
|
|
|
|
double leftRadius = Math.Max(this.blRadius, this.tlRadius);
|
|
double topRadius = Math.Max(this.tlRadius, this.trRadius);
|
|
double rightRadius = Math.Max(this.trRadius, this.brRadius);
|
|
double bottomRadius = Math.Max(this.brRadius, this.blRadius);
|
|
|
|
return Rect.fromLTRB(
|
|
this.left + leftRadius * kInsetFactor,
|
|
this.top + topRadius * kInsetFactor,
|
|
this.right - rightRadius * kInsetFactor,
|
|
this.bottom - bottomRadius * kInsetFactor
|
|
);
|
|
}
|
|
}
|
|
|
|
public Rect middleRect {
|
|
get {
|
|
double leftRadius = Math.Max(this.blRadius, this.tlRadius);
|
|
double topRadius = Math.Max(this.tlRadius, this.trRadius);
|
|
double rightRadius = Math.Max(this.trRadius, this.brRadius);
|
|
double bottomRadius = Math.Max(this.brRadius, this.blRadius);
|
|
|
|
return Rect.fromLTRB(
|
|
this.left + leftRadius,
|
|
this.top + topRadius,
|
|
this.right - rightRadius,
|
|
this.bottom - bottomRadius
|
|
);
|
|
}
|
|
}
|
|
|
|
public Rect wideMiddleRect {
|
|
get {
|
|
double topRadius = Math.Max(this.tlRadius, this.trRadius);
|
|
double bottomRadius = Math.Max(this.brRadius, this.blRadius);
|
|
|
|
return Rect.fromLTRB(
|
|
this.left,
|
|
this.top + topRadius,
|
|
this.right,
|
|
this.bottom - bottomRadius
|
|
);
|
|
}
|
|
}
|
|
|
|
public Rect tallMiddleRect {
|
|
get {
|
|
double leftRadius = Math.Max(this.blRadius, this.tlRadius);
|
|
double rightRadius = Math.Max(this.trRadius, this.brRadius);
|
|
|
|
return Rect.fromLTRB(
|
|
this.left + leftRadius,
|
|
this.top,
|
|
this.right - rightRadius,
|
|
this.bottom
|
|
);
|
|
}
|
|
}
|
|
|
|
public bool isEmpty {
|
|
get { return this.left >= this.right || this.top >= this.bottom; }
|
|
}
|
|
|
|
public bool isFinite {
|
|
get {
|
|
return !Double.IsInfinity(this.left)
|
|
&& !Double.IsInfinity(this.top)
|
|
&& !Double.IsInfinity(this.right)
|
|
&& !Double.IsInfinity(this.bottom);
|
|
}
|
|
}
|
|
|
|
public bool isInfinite {
|
|
get { return !this.isFinite; }
|
|
}
|
|
|
|
public bool isRect {
|
|
get {
|
|
return this.tlRadius == 0.0 &&
|
|
this.trRadius == 0.0 &&
|
|
this.blRadius == 0.0 &&
|
|
this.brRadius == 0.0;
|
|
}
|
|
}
|
|
|
|
public bool isStadium {
|
|
get {
|
|
return this.tlRadius == this.trRadius
|
|
&& this.trRadius == this.brRadius
|
|
&& this.brRadius == this.blRadius
|
|
&& (this.width <= 2.0 * this.tlRadius || this.height <= 2.0 * this.tlRadius);
|
|
}
|
|
}
|
|
|
|
public bool isEllipse {
|
|
get {
|
|
return this.tlRadius == this.trRadius
|
|
&& this.trRadius == this.brRadius
|
|
&& this.brRadius == this.blRadius
|
|
&& (this.width <= 2.0 * this.tlRadius && this.height <= 2.0 * this.tlRadius);
|
|
}
|
|
}
|
|
|
|
public bool isCircle {
|
|
get {
|
|
return this.width == this.height
|
|
&& this.isEllipse;
|
|
}
|
|
}
|
|
|
|
public double shortestSide {
|
|
get { return Math.Min(Math.Abs(this.width), Math.Abs(this.height)); }
|
|
}
|
|
|
|
public double longestSide {
|
|
get { return Math.Max(Math.Abs(this.width), Math.Abs(this.height)); }
|
|
}
|
|
|
|
public Offset center {
|
|
get { return new Offset(this.left + this.width / 2.0, this.top + this.height / 2.0); }
|
|
}
|
|
|
|
public bool Equals(RRect other) {
|
|
if (object.ReferenceEquals(null, other)) return false;
|
|
if (object.ReferenceEquals(this, other)) return true;
|
|
return this.left.Equals(other.left)
|
|
&& this.top.Equals(other.top)
|
|
&& this.right.Equals(other.right)
|
|
&& this.bottom.Equals(other.bottom)
|
|
&& this.tlRadius.Equals(other.tlRadius)
|
|
&& this.trRadius.Equals(other.trRadius)
|
|
&& this.brRadius.Equals(other.brRadius)
|
|
&& this.blRadius.Equals(other.blRadius);
|
|
}
|
|
|
|
public override bool Equals(object obj) {
|
|
if (object.ReferenceEquals(null, obj)) return false;
|
|
if (object.ReferenceEquals(this, obj)) return true;
|
|
if (obj.GetType() != this.GetType()) return false;
|
|
return this.Equals((RRect) obj);
|
|
}
|
|
|
|
public override int GetHashCode() {
|
|
unchecked {
|
|
var hashCode = this.left.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.top.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.right.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.bottom.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.tlRadius.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.trRadius.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.brRadius.GetHashCode();
|
|
hashCode = (hashCode * 397) ^ this.blRadius.GetHashCode();
|
|
return hashCode;
|
|
}
|
|
}
|
|
|
|
public static bool operator ==(RRect a, RRect b) {
|
|
return object.Equals(a, b);
|
|
}
|
|
|
|
public static bool operator !=(RRect a, RRect b) {
|
|
return !(a == b);
|
|
}
|
|
}
|
|
}
|