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MoonTools.Bonk
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adds Point shape

pull/10/head
Evan Hemsley 2019-12-01 22:21:50 -08:00
parent 1430047327
commit a4b6e72286
5 changed files with 196 additions and 1 deletions
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67
Bonk/Shapes/Point.cs Normal file
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@ -0,0 +1,67 @@
using System;
using System.Linq;
using System.Numerics;
using MoonTools.Core.Structs;
namespace MoonTools.Core.Bonk
{
public struct Point : IShape2D, IEquatable<IShape2D>
{
private Position2D position;
public Point(Position2D position)
{
this.position = position;
}
public Point(int x, int y)
{
this.position = new Position2D(x, y);
}
public AABB AABB(Transform2D transform)
{
return Bonk.AABB.FromTransformedVertices(Enumerable.Repeat<Position2D>(position, 1), transform);
}
public Vector2 Support(Vector2 direction, Transform2D transform)
{
return position;
}
public override bool Equals(object obj)
{
if (obj is IShape2D other)
{
return Equals(other);
}
return false;
}
public bool Equals(IShape2D other)
{
if (other is Point otherPoint)
{
return position == otherPoint.position;
}
return false;
}
public override int GetHashCode()
{
return HashCode.Combine(position);
}
public static bool operator ==(Point a, Point b)
{
return a.Equals(b);
}
public static bool operator !=(Point a, Point b)
{
return !(a == b);
}
}
}

2
Bonk/Shapes/Polygon.cs
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@ -10,7 +10,7 @@ namespace MoonTools.Core.Bonk
{
/// <summary>
/// A Shape defined by an arbitrary collection of vertices.
/// NOTE: A Polygon must have more than 2 vertices and should not have duplicate vertices.
/// NOTE: A Polygon must have more than 2 vertices, be convex, and should not have duplicate vertices.
/// </summary>
public struct Polygon : IShape2D, IEquatable<IShape2D>
{

38
Test/Equality.cs
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@ -9,6 +9,44 @@ namespace Tests
{
public class EqualityTests
{
public class PointTests
{
[Test]
public void PointEqual()
{
var a = new Point(1, 1);
var b = new Point(1, 1);
a.Should().BeEquivalentTo(b);
}
[Test]
public void PointNotEqual()
{
var a = new Point(1, 1);
var b = new Point(-1, 1);
a.Should().NotBeEquivalentTo(b);
}
[Test]
public void PointEqualOperator()
{
var a = new Point(1, 1);
var b = new Point(1, 1);
(a == b).Should().BeTrue();
}
[Test]
public void PointNotEqualOperator()
{
var a = new Point(1, 1);
var b = new Point(-1, 1);
(a != b).Should().BeTrue();
}
}
public class CircleTests
{
[Test]

85
Test/GJK2DTest.cs
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@ -8,6 +8,91 @@ namespace Tests
{
public class GJK2DTest
{
[Test]
public void PointLineOverlapping()
{
var point = new Point(1, 1);
var line = new Line(new Position2D(-2, -2), new Position2D(2, 2));
GJK2D.TestCollision(point, Transform2D.DefaultTransform, line, Transform2D.DefaultTransform).Should().BeTrue();
}
[Test]
public void PointLineNotOverlapping()
{
var point = new Point(1, 1);
var line = new Line(new Position2D(-3, -2), new Position2D(-9, -5));
GJK2D.TestCollision(point, Transform2D.DefaultTransform, line, Transform2D.DefaultTransform).Should().BeFalse();
}
[Test]
public void PointCircleOverlapping()
{
var point = new Point();
var circle = new Circle(3);
var pointTransform = new Transform2D(new Position2D(1, 1));
var circleTransform = new Transform2D(new Position2D(-1, 0));
GJK2D.TestCollision(point, pointTransform, circle, circleTransform).Should().BeTrue();
}
[Test]
public void PointCircleNotOverlapping()
{
var point = new Point(3, 0);
var circle = new Circle(1);
GJK2D.TestCollision(point, Transform2D.DefaultTransform, circle, Transform2D.DefaultTransform).Should().BeFalse();
}
[Test]
public void PointRectangleOverlapping()
{
var point = new Point(1, 1);
var rectangle = new Rectangle(-2, -2, 2, 2);
GJK2D.TestCollision(point, Transform2D.DefaultTransform, rectangle, Transform2D.DefaultTransform).Should().BeTrue();
}
[Test]
public void PointRectangleNotOverlapping()
{
var point = new Point(5, 5);
var rectangle = new Rectangle(-2, -2, 2, 2);
GJK2D.TestCollision(point, Transform2D.DefaultTransform, rectangle, Transform2D.DefaultTransform).Should().BeFalse();
}
[Test]
public void PointPolygonOverlapping()
{
var point = new Point(1, 1);
var polygon = new Polygon(
new Position2D(-2, -2),
new Position2D(-3, 2),
new Position2D(3, 2),
new Position2D(3, -2)
);
GJK2D.TestCollision(point, Transform2D.DefaultTransform, polygon, Transform2D.DefaultTransform).Should().BeTrue();
}
[Test]
public void PointPolygonNotOverlapping()
{
var point = new Point(5, 5);
var polygon = new Polygon(
new Position2D(-2, -2),
new Position2D(-3, 2),
new Position2D(3, 2),
new Position2D(3, -2)
);
GJK2D.TestCollision(point, Transform2D.DefaultTransform, polygon, Transform2D.DefaultTransform).Should().BeFalse();
}
[Test]
public void LineLineOverlapping()
{

5
Test/SpatialHashTest.cs
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@ -34,6 +34,9 @@ namespace Tests
var line = new MoonTools.Core.Bonk.Line(new Position2D(20, -4), new Position2D(22, -12));
var lineTransform = new Transform2D(new Vector2(0, 0));
var point = new MoonTools.Core.Bonk.Point(8, 8);
var pointTransform = Transform2D.DefaultTransform;
spatialHash.Insert(0, rectA, rectATransform);
spatialHash.Insert(1, rectB, rectBTransform);
spatialHash.Insert(2, rectC, rectCTransform);
@ -41,9 +44,11 @@ namespace Tests
spatialHash.Insert(4, circleA, circleATransform);
spatialHash.Insert(1, circleB, circleBTransform);
spatialHash.Insert(6, line, lineTransform);
spatialHash.Insert(7, point, pointTransform);
spatialHash.Retrieve(0, rectA, rectATransform).Should().BeEmpty();
spatialHash.Retrieve(1, rectB, rectBTransform).Should().NotContain((1, circleB, circleBTransform));
spatialHash.Retrieve(1, rectB, rectBTransform).Should().Contain((7, point, pointTransform));
spatialHash.Retrieve(2, rectC, rectCTransform).Should().Contain((6, line, lineTransform)).And.Contain((4, circleA, circleATransform));
spatialHash.Retrieve(3, rectD, rectDTransform).Should().Contain((1, circleB, circleBTransform));