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MoonTools.Bonk
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Merge remote-tracking branch 'origin/master' into optimization_merge

pull/2/head
Evan Hemsley 2019-10-25 13:28:29 -07:00
parent ca0488f9d2 5cc9050e4f
commit 1998612d6f
10 changed files with 142 additions and 32 deletions
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22
Bonk/AABB.cs
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@ -8,13 +8,13 @@ namespace MoonTools.Core.Bonk
{
public struct AABB
{
public int MinX { get; private set; }
public int MinY { get; private set; }
public int MaxX { get; private set; }
public int MaxY { get; private set; }
public float MinX { get; private set; }
public float MinY { get; private set; }
public float MaxX { get; private set; }
public float MaxY { get; private set; }
public int Width { get { return MaxX - MinX; } }
public int Height { get { return MaxY - MinY; } }
public float Width { get { return MaxX - MinX; } }
public float Height { get { return MaxY - MinY; } }
public static AABB FromTransformedVertices(IEnumerable<Position2D> vertices, Transform2D transform)
{
@ -22,14 +22,14 @@ namespace MoonTools.Core.Bonk
return new AABB
{
MinX = (int)Math.Round(TransformedVertices.Min(vertex => vertex.X)),
MinY = (int)Math.Round(TransformedVertices.Min(vertex => vertex.Y)),
MaxX = (int)Math.Round(TransformedVertices.Max(vertex => vertex.X)),
MaxY = (int)Math.Round(TransformedVertices.Max(vertex => vertex.Y))
MinX = TransformedVertices.Min(vertex => vertex.X),
MinY = TransformedVertices.Min(vertex => vertex.Y),
MaxX = TransformedVertices.Max(vertex => vertex.X),
MaxY = TransformedVertices.Max(vertex => vertex.Y)
};
}
public AABB(int minX, int minY, int maxX, int maxY)
public AABB(float minX, float minY, float maxX, float maxY)
{
MinX = minX;
MinY = minY;

2
Bonk/Bonk.csproj
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@ -1,6 +1,6 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<Version>1.0.2</Version>
<Version>1.1.0</Version>
<TargetFramework>netstandard2.0</TargetFramework>
<Description>.NET Core Collision Detection for MonoGame</Description>
<PackageId>MoonTools.Core.Bonk</PackageId>

30
Bonk/SpatialHash.cs → Bonk/BroadPhase/SpatialHash.cs
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@ -8,22 +8,22 @@ namespace MoonTools.Core.Bonk
{
private readonly int cellSize;
private readonly Dictionary<int, Dictionary<int, HashSet<(IShape2D, Transform2D)>>> hashDictionary = new Dictionary<int, Dictionary<int, HashSet<(IShape2D, Transform2D)>>>();
private readonly Dictionary<(IShape2D, Transform2D), T> IDLookup = new Dictionary<(IShape2D, Transform2D), T>();
private readonly Dictionary<int, Dictionary<int, HashSet<T>>> hashDictionary = new Dictionary<int, Dictionary<int, HashSet<T>>>();
private readonly Dictionary<T, (IShape2D, Transform2D)> IDLookup = new Dictionary<T, (IShape2D, Transform2D)>();
public SpatialHash(int cellSize)
{
this.cellSize = cellSize;
}
private (int, int) Hash(int x, int y)
private (int, int) Hash(float x, float y)
{
return ((int)Math.Floor((float)x / cellSize), (int)Math.Floor((float)y / cellSize));
return ((int)Math.Floor(x / cellSize), (int)Math.Floor(y / cellSize));
}
public void Insert(T id, IShape2D shape, Transform2D Transform2D)
public void Insert(T id, IShape2D shape, Transform2D transform2D)
{
var box = shape.AABB(Transform2D);
var box = shape.AABB(transform2D);
var minHash = Hash(box.MinX, box.MinY);
var maxHash = Hash(box.MaxX, box.MaxY);
@ -33,23 +33,23 @@ namespace MoonTools.Core.Bonk
{
if (!hashDictionary.ContainsKey(i))
{
hashDictionary.Add(i, new Dictionary<int, HashSet<(IShape2D, Transform2D)>>());
hashDictionary.Add(i, new Dictionary<int, HashSet<T>>());
}
if (!hashDictionary[i].ContainsKey(j))
{
hashDictionary[i].Add(j, new HashSet<(IShape2D, Transform2D)>());
hashDictionary[i].Add(j, new HashSet<T>());
}
hashDictionary[i][j].Add((shape, Transform2D));
IDLookup[(shape, Transform2D)] = id;
hashDictionary[i][j].Add(id);
IDLookup[id] = (shape, transform2D);
}
}
}
public IEnumerable<(T, IShape2D, Transform2D)> Retrieve(T id, IShape2D shape, Transform2D Transform2D)
public IEnumerable<(T, IShape2D, Transform2D)> Retrieve(T id, IShape2D shape, Transform2D transform2D)
{
var box = shape.AABB(Transform2D);
var box = shape.AABB(transform2D);
var minHash = Hash(box.MinX, box.MinY);
var maxHash = Hash(box.MaxX, box.MaxY);
@ -59,10 +59,10 @@ namespace MoonTools.Core.Bonk
{
if (hashDictionary.ContainsKey(i) && hashDictionary[i].ContainsKey(j))
{
foreach (var (otherShape, otherTransform2D) in hashDictionary[i][j])
foreach (var t in hashDictionary[i][j])
{
var otherID = IDLookup[(otherShape, otherTransform2D)];
if (!id.Equals(otherID)) { yield return (otherID, otherShape, otherTransform2D); }
var (otherShape, otherTransform) = IDLookup[t];
if (!id.Equals(t)) { yield return (t, otherShape, otherTransform); }
}
}
}

0
Bonk/EPA2D.cs → Bonk/NarrowPhase/EPA2D.cs
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0
Bonk/Edge.cs → Bonk/NarrowPhase/Edge.cs
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0
Bonk/GJK2D.cs → Bonk/NarrowPhase/GJK2D.cs
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10
Bonk/Shapes/Circle.cs
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@ -18,13 +18,13 @@ namespace MoonTools.Core.Bonk
return Vector2.Transform(Vector2.Normalize(direction) * Radius, transform.TransformMatrix);
}
public AABB AABB(Transform2D Transform2D)
public AABB AABB(Transform2D transform2D)
{
return new AABB(
Transform2D.Position.X - Radius,
Transform2D.Position.Y - Radius,
Transform2D.Position.X + Radius,
Transform2D.Position.Y + Radius
transform2D.Position.X - Radius * transform2D.Scale.X,
transform2D.Position.Y - Radius * transform2D.Scale.Y,
transform2D.Position.X + Radius * transform2D.Scale.X,
transform2D.Position.Y + Radius * transform2D.Scale.Y
);
}

5
README.md Normal file
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@ -0,0 +1,5 @@
# MoonTools.Core.Bonk
.NET Core Collision Detection for MonoGame
## Documentation
Detailed docs can be found here: https://moontools-docs.github.io/bonk/

84
Test/GJK2DTest.cs
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@ -17,6 +17,17 @@ namespace Tests
GJK2D.TestCollision(lineA, Transform2D.DefaultTransform, lineB, Transform2D.DefaultTransform).Should().BeTrue();
}
[Test]
public void ScaledLinesOverlapping()
{
var lineA = new Line(new Position2D(-1, -1), new Position2D(1, 1));
var lineB = new Line(new Position2D(-1, 1), new Position2D(1, -1));
var transform = new Transform2D(new Position2D(0, 0), 0f, new Vector2(2, 2));
Assert.IsTrue(GJK2D.TestCollision(lineA, transform, lineB, transform).Item1);
}
[Test]
public void LineLineNotOverlapping()
{
@ -26,6 +37,17 @@ namespace Tests
GJK2D.TestCollision(lineA, Transform2D.DefaultTransform, lineB, Transform2D.DefaultTransform).Should().BeFalse();
}
[Test]
public void ScaledLinesNotOverlapping()
{
var lineA = new Line(new Position2D(0, 1), new Position2D(1, 0));
var lineB = new Line(new Position2D(-1, -1), new Position2D(-2, -2));
var transform = new Transform2D(new Position2D(0, 0), 0f, new Vector2(2, 2));
Assert.IsFalse(GJK2D.TestCollision(lineA, transform, lineB, transform).Item1);
}
[Test]
public void CircleCircleOverlapping()
{
@ -37,6 +59,17 @@ namespace Tests
Assert.IsTrue(GJK2D.TestCollision(circleA, transformA, circleB, transformB));
}
[Test]
public void ScaledCirclesOverlapping()
{
var circleA = new Circle(2);
var transformA = new Transform2D(new Vector2(-3, 0), 0f, new Vector2(2, 2));
var circleB = new Circle(2);
var transformB = new Transform2D(new Vector2(3, 0), 0f, new Vector2(2, 2));
Assert.IsTrue(GJK2D.TestCollision(circleA, transformA, circleB, transformB).Item1);
}
[Test]
public void CircleCircleNotOverlapping()
{
@ -48,6 +81,17 @@ namespace Tests
Assert.IsFalse(GJK2D.TestCollision(circleA, transformA, circleB, transformB));
}
[Test]
public void ScaledCirclesNotOverlapping()
{
var circleA = new Circle(2);
var transformA = new Transform2D(new Vector2(-5, -5), 0, new Vector2(0.2f, 0.2f));
var circleB = new Circle(2);
var transformB = new Transform2D(new Vector2(5, 5), 0, new Vector2(0.2f, 0.2f));
Assert.IsFalse(GJK2D.TestCollision(circleA, transformA, circleB, transformB).Item1);
}
[Test]
public void PolygonPolygonOverlapping()
{
@ -68,6 +112,26 @@ namespace Tests
Assert.IsTrue(GJK2D.TestCollision(shapeA, transformA, shapeB, transformB));
}
[Test]
public void ScaledPolygonsOverlapping()
{
var shapeA = new Polygon(
new Position2D(-1, 1), new Position2D(1, 1),
new Position2D(-1, -1), new Position2D(1, -1)
);
var transformA = Transform2D.DefaultTransform;
var shapeB = new Polygon(
new Position2D(-1, 1), new Position2D(1, 1),
new Position2D(-1, -1), new Position2D(1, -1)
);
var transformB = new Transform2D(new Vector2(3f, 0f), 0f, new Vector2(3f, 3f));
Assert.IsTrue(GJK2D.TestCollision(shapeA, transformA, shapeB, transformB).Item1);
}
[Test]
public void PolygonPolygonNotOverlapping()
{
@ -88,6 +152,26 @@ namespace Tests
Assert.IsFalse(GJK2D.TestCollision(shapeA, transformA, shapeB, transformB));
}
[Test]
public void ScaledPolygonsNotOverlapping()
{
var shapeA = new Polygon(
new Position2D(-1, 1), new Position2D(1, 1),
new Position2D(-1, -1), new Position2D(1, -1)
);
var transformA = Transform2D.DefaultTransform;
var shapeB = new Polygon(
new Position2D(-1, 1), new Position2D(1, 1),
new Position2D(-1, -1), new Position2D(1, -1)
);
var transformB = new Transform2D(new Vector2(2f, 0), 0f, new Vector2(0.2f, 0.2f));
Assert.IsFalse(GJK2D.TestCollision(shapeA, transformA, shapeB, transformB).Item1);
}
[Test]
public void LinePolygonOverlapping()
{

21
Test/SpatialHashTest.cs
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@ -53,6 +53,27 @@ namespace Tests
spatialHash.Retrieve(6, line, lineTransform).Should().Contain((4, circleA, circleATransform)).And.Contain((2, rectC, rectCTransform));
}
[Test]
public void InsertAndRetrieveSameValues()
{
var spatialHash = new SpatialHash<int>(16);
var rectA = new MoonTools.Core.Bonk.Rectangle(-2, -2, 2, 2);
var rectATransform = new Transform2D(new Vector2(-8, -8));
var rectB = new MoonTools.Core.Bonk.Rectangle(-2, -2, 2, 2);
var rectBTransform = new Transform2D(new Vector2(-8, -8));
var rectC = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
var rectCTransform = new Transform2D(new Vector2(-8, -8));
spatialHash.Insert(0, rectA, rectATransform);
spatialHash.Insert(1, rectB, rectBTransform);
spatialHash.Insert(2, rectC, rectCTransform);
spatialHash.Retrieve(2, rectC, rectCTransform).Should().HaveCount(2);
}
[Test]
public void Clear()
{