80 lines
3.0 KiB
C#
80 lines
3.0 KiB
C#
using NUnit.Framework;
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using FluentAssertions;
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using System;
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using System.Numerics;
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using MoonTools.Core.Structs;
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using MoonTools.Core.Bonk;
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namespace Tests
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{
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public class EPA2DTest
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{
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[Test]
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public void RectangleOverlap()
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{
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var squareA = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
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var transformA = Transform2D.DefaultTransform;
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var squareB = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
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var transformB = new Transform2D(new Vector2(1.5f, 0));
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var (result, simplex) = GJK2D.FindCollisionSimplex(squareA, transformA, squareB, transformB);
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result.Should().BeTrue();
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var intersection = EPA2D.Intersect(squareA, transformA, squareB, transformB, simplex);
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intersection.X.Should().Be(1f);
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intersection.Y.Should().Be(0);
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var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
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GJK2D.TestCollision(squareA, movedTransform, squareB, transformB).Should().BeFalse();
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}
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[Test]
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public void CircleOverlap()
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{
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var circleA = new Circle(2);
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var transformA = Transform2D.DefaultTransform;
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var circleB = new Circle(1);
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var transformB = new Transform2D(new Vector2(1, 1));
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var (result, simplex) = GJK2D.FindCollisionSimplex(circleA, transformA, circleB, transformB);
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result.Should().BeTrue();
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var intersection = EPA2D.Intersect(circleA, transformA, circleB, transformB, simplex);
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var ix = (circleA.Radius * (float)Math.Cos(Math.PI / 4)) - ((circleB.Radius * (float)Math.Cos(5 * Math.PI / 4)) + transformB.Position.X);
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var iy = (circleA.Radius * (float)Math.Sin(Math.PI / 4)) - ((circleB.Radius * (float)Math.Sin(5 * Math.PI / 4)) + transformB.Position.Y);
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intersection.X.Should().BeApproximately(ix, 0.01f);
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intersection.Y.Should().BeApproximately(iy, 0.01f);
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var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
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GJK2D.TestCollision(circleA, movedTransform, circleB, transformB).Should().BeFalse();
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}
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[Test]
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public void LineRectangleOverlap()
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{
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var line = new Line(new Position2D(-4, -4), new Position2D(4, 4));
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var transformA = Transform2D.DefaultTransform;
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var square = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
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var transformB = Transform2D.DefaultTransform;
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var (result, simplex) = GJK2D.FindCollisionSimplex(line, transformA, square, transformB);
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result.Should().BeTrue();
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var intersection = EPA2D.Intersect(line, transformA, square, transformB, simplex);
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var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
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GJK2D.TestCollision(line, movedTransform, square, transformB).Should().BeFalse();
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}
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}
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}
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