update drone

.circleci/config.yml

@@ -1,46 +0,0 @@
-version: 2.1
-
-defaults: &defaults
-  working_directory: ~/repo
-  docker:
-    - image: mcr.microsoft.com/dotnet/core/sdk:3.0
-      environment:
-        DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
-        DOTNET_CLI_TELEMETRY_OPTOUT: 1
-
-jobs:
-  test:
-    <<: *defaults
-    steps:
-      - checkout
-      - run: dotnet restore
-      - run: dotnet build -c Release
-      - run: dotnet test -c Release
-      - persist_to_workspace:
-          root: .
-          paths: ./Bonk/bin
-
-  deploy:
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: .
-      - run: dotnet nuget push ./Bonk/bin/Release/MoonTools.Core.Bonk.*.nupkg -k $API_KEY -s https://api.nuget.org/v3/index.json
-
-workflows:
-  version: 2
-  test_and_deploy:
-    jobs:
-      - test:
-          filters:
-            tags:
-              only: /.*/
-      - deploy:
-          requires:
-            - test
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /^\d+\.\d+\.\d+(-preview\d*)?$/

.drone.yml

@@ -0,0 +1,24 @@
+kind: pipeline
+type: docker
+name: default
+
+workspace:
+  path: /build
+
+steps:
+- name: test
+  image: mcr.microsoft.com/dotnet/core/sdk:3.1
+  commands:
+    - dotnet build -c Release
+    - dotnet test -c Release
+
+- name: deploy
+  image: mcr.microsoft.com/dotnet/core/sdk:3.1
+  environment:
+    API_KEY:
+      from_secret: API_KEY
+  commands:
+    - dotnet nuget push /build/Bonk/bin/Release/MoonTools.Bonk.*.nupkg -s https://api.nuget.org/v3/index.json -k $API_KEY 
+  when:
+    ref:
+    - refs/tags/*.*.*

Bonk/AABB.cs

@@ -1,9 +1,9 @@
 using System;
 using System.Collections.Generic;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// Axis-aligned bounding box.
@@ -26,11 +26,13 @@ namespace MoonTools.Core.Bonk
 
         public float Right { get { return Max.X; } }
         public float Left { get { return Min.X; } }
+
         /// <summary>
         /// The top of the AABB. Assumes a downward-aligned Y axis, so this value will be smaller than Bottom.
         /// </summary>
         /// <value></value>
         public float Top { get { return Min.Y; } }
+
         /// <summary>
         /// The bottom of the AABB. Assumes a downward-aligned Y axis, so this value will be larger than Top.
         /// </summary>

Bonk/Bonk.csproj

@@ -1,28 +1,29 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Version>6.0.0</Version>
+    <Version>8.0.1</Version>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <Description>.NET Core High Performance Collision Detection</Description>
-    <PackageId>MoonTools.Core.Bonk</PackageId>
-    <RootNamespace>MoonTools.Core.Bonk</RootNamespace>
+    <Description>.NET Standard High Performance Collision Detection</Description>
+    <PackageId>MoonTools.Bonk</PackageId>
+    <RootNamespace>MoonTools.Bonk</RootNamespace>
     <Company>Moonside Games</Company>
     <Authors>Evan Hemsley</Authors>
     <Copyright>Evan Hemsley 2019</Copyright>
-    <Product>MoonTools.Core.Bonk</Product>
+    <Product>MoonTools.Bonk</Product>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <AssemblyName>MoonTools.Core.Bonk</AssemblyName>
+    <AssemblyName>MoonTools.Bonk</AssemblyName>
     <PackageLicenseExpression>LGPL-3.0-only</PackageLicenseExpression>
-    <PackageProjectUrl>https://github.com/MoonsideGames/MoonTools.Core.Bonk</PackageProjectUrl>
+    <PackageProjectUrl>https://gitea.moonside.games/MoonsideGames/MoonTools.Bonk</PackageProjectUrl>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <Platforms>x64</Platforms>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="MoonTools.Core.Structs" Version="3.0.0" />
-    <PackageReference Include="System.Collections.Immutable" Version="1.7.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="1.7.1" />
     <PackageReference Include="System.Numerics.Vectors" Version="4.5.0" />
     <PackageReference Include="Microsoft.Bcl.HashCode" Version="1.1.0" />
+    <PackageReference Include="MoonTools.Structs" Version="3.0.1" />
   </ItemGroup>
 </Project>

Bonk/BroadPhase/SpatialHash.cs

@@ -1,9 +1,9 @@
 using System;
 using System.Collections.Generic;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// Used to quickly check if two shapes are potentially overlapping.
@@ -16,6 +16,12 @@ namespace MoonTools.Core.Bonk
         private readonly Dictionary<long, HashSet<T>> hashDictionary = new Dictionary<long, HashSet<T>>();
         private readonly Dictionary<T, (IHasAABB2D, Transform2D)> IDLookup = new Dictionary<T, (IHasAABB2D, Transform2D)>();
 
+        public int MinX { get; private set; } = 0;
+        public int MaxX { get; private set; } = 0;
+        public int MinY { get; private set; } = 0;
+        public int MaxY { get; private set; } = 0;
+
+
         public SpatialHash(int cellSize)
         {
             this.cellSize = cellSize;
@@ -52,6 +58,11 @@ namespace MoonTools.Core.Bonk
                     IDLookup[id] = (shape, transform2D);
                 }
             }
+
+            MinX = Math.Min(MinX, minHash.Item1);
+            MinY = Math.Min(MinY, minHash.Item2);
+            MaxX = Math.Max(MaxX, maxHash.Item1);
+            MaxY = Math.Max(MaxY, maxHash.Item2);
         }
 
         /// <summary>
@@ -60,12 +71,17 @@ namespace MoonTools.Core.Bonk
         public IEnumerable<(T, IHasAABB2D, Transform2D)> Retrieve(T id, IHasAABB2D shape, Transform2D transform2D)
         {
             var box = shape.TransformedAABB(transform2D);
-            var minHash = Hash(box.Min);
-            var maxHash = Hash(box.Max);
+            var (minX, minY) = Hash(box.Min);
+            var (maxX, maxY) = Hash(box.Max);
 
-            for (var i = minHash.Item1; i <= maxHash.Item1; i++)
+            if (minX < MinX) { minX = MinX; }
+            if (maxX > MaxX) { maxX = MaxX; }
+            if (minY < MinY) { minY = MinY; }
+            if (maxY > MaxY) { maxY = MaxY; }
+
+            for (var i = minX; i <= maxX; i++)
             {
-                for (var j = minHash.Item2; j <= maxHash.Item2; j++)
+                for (var j = minY; j <= maxY; j++)
                 {
                     var key = MakeLong(i, j);
                     if (hashDictionary.ContainsKey(key))
@@ -73,7 +89,43 @@ namespace MoonTools.Core.Bonk
                         foreach (var t in hashDictionary[key])
                         {
                             var (otherShape, otherTransform) = IDLookup[t];
-                            if (!id.Equals(t) && AABB.TestOverlap(shape.TransformedAABB(transform2D), otherShape.TransformedAABB(otherTransform)))
+                            if (!id.Equals(t) && AABB.TestOverlap(box, otherShape.TransformedAABB(otherTransform)))
+                            {
+                                yield return (t, otherShape, otherTransform);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+
+        /// <summary>
+        /// Retrieves objects based on a pre-transformed AABB.
+        /// </summary>
+        /// <param name="aabb">A transformed AABB.</param>
+        /// <returns></returns>
+        public IEnumerable<(T, IHasAABB2D, Transform2D)> Retrieve(AABB aabb)
+        {
+            var (minX, minY) = Hash(aabb.Min);
+            var (maxX, maxY) = Hash(aabb.Max);
+
+            if (minX < MinX) { minX = MinX; }
+            if (maxX > MaxX) { maxX = MaxX; }
+            if (minY < MinY) { minY = MinY; }
+            if (maxY > MaxY) { maxY = MaxY; }
+
+            for (var i = minX; i <= maxX; i++)
+            {
+                for (var j = minY; j <= maxY; j++)
+                {
+                    var key = MakeLong(i, j);
+                    if (hashDictionary.ContainsKey(key))
+                    {
+                        foreach (var t in hashDictionary[key])
+                        {
+                            var (otherShape, otherTransform) = IDLookup[t];
+                            if (AABB.TestOverlap(aabb, otherShape.TransformedAABB(otherTransform)))
                             {
                                 yield return (t, otherShape, otherTransform);
                             }

Bonk/IHasAABB2D.cs

@@ -1,7 +1,6 @@
-using System;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     public interface IHasAABB2D
     {

Bonk/IShape2D.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     public interface IShape2D : IHasAABB2D, IEquatable<IShape2D>
     {

Bonk/MinkowskiDifference.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A Minkowski difference between two shapes.

Bonk/MultiShape.cs

@@ -1,8 +1,9 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using MoonTools.Core.Structs;
+using System.Numerics;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     public struct MultiShape : IHasAABB2D
     {
@@ -22,14 +23,30 @@ namespace MoonTools.Core.Bonk
             return AABB.Transformed(AABB, transform);
         }
 
-        public IEnumerable<(IShape2D, Transform2D)> TransformedShapeTransforms(Transform2D transform)
+        /// <summary>
+        /// Moves the shapes by pivoting with an offset transform. 
+        /// </summary>
+        /// <param name="offsetTransform"></param>
+        /// <returns></returns>
+        public IEnumerable<(IShape2D, Transform2D)> TransformShapesUsingOffset(Transform2D offsetTransform)
         {
             foreach (var (shape, shapeTransform) in ShapeTransformPairs)
             {
-                yield return (shape, transform.Compose(shapeTransform));
+                var newTransform = new Transform2D(Vector2.Transform(shapeTransform.Position, offsetTransform.TransformMatrix), offsetTransform.Rotation, offsetTransform.Scale);
+                yield return (shape, newTransform);
             }
         }
 
+        public bool IsSingleShape<T>() where T : struct, IShape2D
+        {
+            return ShapeTransformPairs.Length == 1 && ShapeTransformPairs[0].Item1 is T;
+        }
+
+        public (T, Transform2D) ShapeTransformPair<T>() where T : struct, IShape2D
+        {
+            return ((T, Transform2D))ShapeTransformPairs[0];
+        }
+
         private static AABB AABBFromShapes(IEnumerable<(IShape2D, Transform2D)> shapeTransforms)
         {
             var minX = float.MaxValue;

Bonk/NarrowPhase/Edge.cs

@@ -1,6 +1,6 @@
 using System.Numerics;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     internal struct Edge
     {

Bonk/NarrowPhase/NarrowPhase.cs

@@ -1,7 +1,7 @@
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 using System.Numerics;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     public static class NarrowPhase
     {
@@ -70,9 +70,9 @@ namespace MoonTools.Core.Bonk
         /// <returns></returns>
         public static bool TestCollision(MultiShape multiShape, Transform2D multiShapeTransform, IShape2D shape, Transform2D shapeTransform)
         {
-            foreach (var (otherShape, otherTransform) in multiShape.ShapeTransformPairs)
+            foreach (var (otherShape, otherTransform) in multiShape.TransformShapesUsingOffset(multiShapeTransform))
             {
-                if (TestCollision(shape, shapeTransform, otherShape, multiShapeTransform.Compose(otherTransform))) { return true; }
+                if (TestCollision(shape, shapeTransform, otherShape, otherTransform)) { return true; }
             }
             return false;
         }
@@ -88,9 +88,9 @@ namespace MoonTools.Core.Bonk
         /// <returns></returns>
         public static bool TestCollision(IShape2D shape, Transform2D shapeTransform, MultiShape multiShape, Transform2D multiShapeTransform)
         {
-            foreach (var (otherShape, otherTransform) in multiShape.ShapeTransformPairs)
+            foreach (var (otherShape, otherTransform) in multiShape.TransformShapesUsingOffset(multiShapeTransform))
             {
-                if (TestCollision(shape, shapeTransform, otherShape, multiShapeTransform.Compose(otherTransform))) { return true; }
+                if (TestCollision(shape, shapeTransform, otherShape, otherTransform)) { return true; }
             }
             return false;
         }
@@ -106,11 +106,11 @@ namespace MoonTools.Core.Bonk
         /// <returns></returns>
         public static bool TestCollision(MultiShape multiShapeA, Transform2D transformA, MultiShape multiShapeB, Transform2D transformB)
         {
-            foreach (var (shapeA, shapeTransformA) in multiShapeA.ShapeTransformPairs)
+            foreach (var (shapeA, shapeTransformA) in multiShapeA.TransformShapesUsingOffset(transformA))
             {
-                foreach (var (shapeB, shapeTransformB) in multiShapeB.ShapeTransformPairs)
+                foreach (var (shapeB, shapeTransformB) in multiShapeB.TransformShapesUsingOffset(transformB))
                 {
-                    if (TestCollision(shapeA, transformA.Compose(shapeTransformA), shapeB, transformB.Compose(shapeTransformB))) { return true; }
+                    if (TestCollision(shapeA, shapeTransformA, shapeB, shapeTransformB)) { return true; }
                 }
             }
             return false;

Bonk/NarrowPhase/SimplexVertexBuffer.cs

@@ -1,8 +1,8 @@
 using System.Collections.Generic;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     internal unsafe struct SimplexVertexBuffer
     {

Bonk/Shapes/Circle.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A Circle is a shape defined by a radius.

Bonk/Shapes/Line.cs

@@ -1,9 +1,9 @@
 using System;
 using System.Collections.Generic;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A line is a shape defined by exactly two points in space.

Bonk/Shapes/Point.cs

@@ -1,9 +1,12 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
+    /// <summary>
+    /// A Point is "that which has not part". All points by themselves are identical.
+    /// </summary>
     public struct Point : IShape2D, IEquatable<Point>
     {
         public AABB AABB { get; }

Bonk/Shapes/Polygon.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A Shape defined by an arbitrary collection of vertices.
@@ -59,7 +59,7 @@ namespace MoonTools.Core.Bonk
 
         public bool Equals(IShape2D other)
         {
-            return (other is Polygon otherPolygon && Equals(otherPolygon));
+            return other is Polygon otherPolygon && Equals(otherPolygon);
         }
 
         public bool Equals(Polygon other)

Bonk/Shapes/Rectangle.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A rectangle is a shape defined by a width and height. The origin is the center of the rectangle.
@@ -23,15 +23,15 @@ namespace MoonTools.Core.Bonk
         public Vector2 Min { get; }
         public Vector2 Max { get; }
 
-        public Rectangle(int width, int height)
+        public Rectangle(int left, int top, int width, int height)
         {
             Width = width;
             Height = height;
-            AABB = new AABB(-width / 2f, -height / 2f, width / 2f, height / 2f);
-            Right = AABB.Right;
-            Left = AABB.Left;
-            Top = AABB.Top;
-            Bottom = AABB.Bottom;
+            Left = left;
+            Right = left + width;
+            Top = top;
+            Bottom = top + height;
+            AABB = new AABB(left, top, Right, Bottom);
             BottomLeft = new Vector2(Left, Bottom);
             TopRight = new Vector2(Top, Right);
             Min = AABB.Min;

Bonk/Simplex.cs

@@ -1,9 +1,9 @@
 using System.Collections.Generic;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 using System;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     /// <summary>
     /// A simplex is a shape with up to n - 2 vertices in the nth dimension.

Bonk/SweepTest/SweepResult.cs

@@ -1,26 +1,21 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
-    public struct SweepResult<T, U> where T : IEquatable<T> where U : struct, IShape2D
+    public struct SweepResult<T> where T : IEquatable<T>
     {
-        public static SweepResult<T, U> False = new SweepResult<T, U>();
+        public readonly static SweepResult<T> False = new SweepResult<T>();
 
         public bool Hit { get; }
         public Vector2 Motion { get; }
         public T ID { get; }
-        public U Shape { get; }
-        public Transform2D Transform { get; }
 
-        public SweepResult(bool hit, Vector2 motion, T id, U shape, Transform2D transform)
+        public SweepResult(bool hit, Vector2 motion, T id)
         {
             Hit = hit;
             Motion = motion;
             ID = id;
-            Shape = shape;
-            Transform = transform;
         }
     }
 }

Bonk/SweepTest/SweepTest.cs

@@ -1,13 +1,13 @@
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
+using MoonTools.Structs;
 
-namespace MoonTools.Core.Bonk
+namespace MoonTools.Bonk
 {
     public static class SweepTest
     {
         /// <summary>
-        /// Performs a sweep test on rectangles.
+        /// Performs a sweep test on and against rectangles. Returns the position 1 pixel before overlap occurs.
         /// </summary>
         /// <typeparam name="T"></typeparam>
         /// <param name="spatialHash">A spatial hash.</param>
@@ -15,7 +15,7 @@ namespace MoonTools.Core.Bonk
         /// <param name="transform">A transform by which to transform the IHasAABB2D.</param>
         /// <param name="ray">Given in world-space.</param>
         /// <returns></returns>
-        public static SweepResult<T, Rectangle> Rectangle<T>(SpatialHash<T> spatialHash, Rectangle rectangle, Transform2D transform, Vector2 ray) where T : IEquatable<T>
+        public static SweepResult<T> Test<T>(SpatialHash<T> spatialHash, Rectangle rectangle, Transform2D transform, Vector2 ray) where T : IEquatable<T>
         {
             var transformedAABB = rectangle.TransformedAABB(transform);
             var sweepBox = SweepBox(transformedAABB, ray);
@@ -27,74 +27,100 @@ namespace MoonTools.Core.Bonk
 
             foreach (var (id, shape, shapeTransform) in spatialHash.Retrieve(sweepBox))
             {
-                if (shape is Rectangle otherRectangle)
+                Rectangle otherRectangle;
+                Transform2D otherTransform;
+                AABB otherTransformedAABB;
+                if (shape is Rectangle)
                 {
-                    var otherTransformedAABB = otherRectangle.TransformedAABB(shapeTransform);
-                    float xInvEntry, yInvEntry;
+                    otherRectangle = (Rectangle)shape;
+                    otherTransformedAABB = shape.TransformedAABB(shapeTransform);
+                    otherTransform = shapeTransform;
+                }
+                else if (shape is MultiShape multiShape && multiShape.IsSingleShape<Rectangle>())
+                {
+                    Transform2D rectangleOffset;
+                    (otherRectangle, rectangleOffset) = multiShape.ShapeTransformPair<Rectangle>();
+                    otherTransform = shapeTransform.Compose(rectangleOffset);
+                    otherTransformedAABB = shape.TransformedAABB(otherTransform);
+                }
+                else
+                {
+                    continue;
+                }
 
-                    if (ray.X > 0)
-                    {
-                        xInvEntry = shapeTransform.Position.X - (transform.Position.X + transformedAABB.Width);
-                    }
-                    else
-                    {
-                        xInvEntry = (shapeTransform.Position.X + otherTransformedAABB.Width) - transform.Position.X;
-                    }
+                float xInvEntry, yInvEntry;
 
-                    if (ray.Y > 0)
-                    {
-                        yInvEntry = shapeTransform.Position.Y - (transform.Position.Y + transformedAABB.Height);
-                    }
-                    else
-                    {
-                        yInvEntry = (shapeTransform.Position.Y + otherTransformedAABB.Height) - shapeTransform.Position.Y;
-                    }
+                if (ray.X > 0)
+                {
+                    xInvEntry = otherTransformedAABB.Left - (transformedAABB.Right);
+                }
+                else
+                {
+                    xInvEntry = (otherTransformedAABB.Right) - transformedAABB.Left;
+                }
 
-                    float xEntry, yEntry;
+                if (ray.Y > 0)
+                {
+                    yInvEntry = otherTransformedAABB.Top - (transformedAABB.Bottom);
+                }
+                else
+                {
+                    yInvEntry = (otherTransformedAABB.Bottom) - transformedAABB.Top;
+                }
 
-                    if (ray.X == 0)
-                    {
-                        xEntry = float.MinValue;
-                    }
-                    else
-                    {
-                        xEntry = xInvEntry / ray.X;
-                    }
+                float xEntry, yEntry;
 
-                    if (ray.Y == 0)
-                    {
-                        yEntry = float.MinValue;
-                    }
-                    else
-                    {
-                        yEntry = yInvEntry / ray.Y;
-                    }
+                if (ray.X == 0)
+                {
+                    xEntry = float.MinValue;
+                }
+                else
+                {
+                    xEntry = xInvEntry / ray.X;
+                }
 
-                    var entryTime = Math.Max(xEntry, yEntry);
+                if (ray.Y == 0)
+                {
+                    yEntry = float.MinValue;
+                }
+                else
+                {
+                    yEntry = yInvEntry / ray.Y;
+                }
 
-                    if (entryTime > 0 && entryTime < 1)
+                var entryTime = Math.Max(xEntry, yEntry);
+
+                if (entryTime >= 0 && entryTime <= 1)
+                {
+                    if (entryTime < shortestDistance)
                     {
-                        if (entryTime < shortestDistance)
-                        {
-                            shortestDistance = entryTime;
-                            nearestID = id;
-                            nearestRectangle = rectangle;
-                            nearestTransform = shapeTransform;
-                        }
+                        shortestDistance = entryTime;
+                        nearestID = id;
+                        nearestRectangle = otherRectangle;
+                        nearestTransform = shapeTransform;
                     }
                 }
+
             }
 
             if (nearestRectangle.HasValue)
             {
-                return new SweepResult<T, Rectangle>(true, ray * shortestDistance, nearestID, nearestRectangle.Value, nearestTransform.Value);
+                var overlapPosition = ray * shortestDistance;
+                var correctionX = -Math.Sign(ray.X);
+                var correctionY = -Math.Sign(ray.Y);
+                return new SweepResult<T>(true, new Position2D((int)overlapPosition.X + correctionX, (int)overlapPosition.Y + correctionY), nearestID);
             }
             else
             {
-                return SweepResult<T, Rectangle>.False;
+                return SweepResult<T>.False;
             }
         }
 
+        public static SweepResult<T> Test<T>(SpatialHash<T> spatialHash, Point point, Transform2D transform, Vector2 ray) where T : IEquatable<T>
+        {
+            return Test(spatialHash, new Rectangle(0, 0, 0, 0), transform, ray);
+        }
+
         private static AABB SweepBox(AABB aabb, Vector2 ray)
         {
             return new AABB(

Bonk/Vector2Extensions.cs

@@ -1,6 +1,6 @@
 using System.Numerics;
 
-namespace MoonTools.Core.Bonk.Extensions
+namespace MoonTools.Bonk.Extensions
 {
     internal static class Vector2Extensions
     {

README.md

@@ -1,7 +1,7 @@
-# MoonTools.Core.Bonk
+# MoonTools.Bonk
 
-[![NuGet Badge](https://buildstats.info/nuget/MoonTools.Core.Bonk)](https://www.nuget.org/packages/MoonTools.Core.Bonk/)
-[![CircleCI](https://circleci.com/gh/MoonsideGames/MoonTools.Core.Bonk.svg?style=svg)](https://circleci.com/gh/MoonsideGames/MoonTools.Core.Bonk)
+[![NuGet Badge](https://buildstats.info/nuget/MoonTools.Bonk)](https://www.nuget.org/packages/MoonTools.Bonk/)
+[![Build Status](https://gitea.drone.moonside.games/api/badges/MoonsideGames/MoonTools.Bonk/status.svg)](https://gitea.drone.moonside.games/MoonsideGames/MoonTools.Bonk)
 
 Bonk is a fast and modular collision detection system for .NET that is part of the MoonTools suite. It can be used with any .NET-based game engine.
 

Test/AABBTest.cs

@@ -1,6 +1,6 @@
 using NUnit.Framework;
 using FluentAssertions;
-using MoonTools.Core.Bonk;
+using MoonTools.Bonk;
 using System.Numerics;
 
 namespace Tests

Test/EPA2DTest.cs

@@ -3,8 +3,8 @@ using FluentAssertions;
 
 using System;
 using System.Numerics;
-using MoonTools.Core.Structs;
-using MoonTools.Core.Bonk;
+using MoonTools.Structs;
+using MoonTools.Bonk;
 
 namespace Tests
 {
@@ -13,9 +13,9 @@ namespace Tests
         [Test]
         public void RectangleOverlap()
         {
-            var squareA = new Rectangle(2, 2);
+            var squareA = new Rectangle(-1, -1, 2, 2);
             var transformA = Transform2D.DefaultTransform;
-            var squareB = new Rectangle(2, 2);
+            var squareB = new Rectangle(-1, -1, 2, 2);
             var transformB = new Transform2D(new Vector2(1.5f, 0));
 
             var (result, simplex) = NarrowPhase.FindCollisionSimplex(squareA, transformA, squareB, transformB);
@@ -27,7 +27,7 @@ namespace Tests
             intersection.X.Should().Be(1f);
             intersection.Y.Should().Be(0);
 
-            var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
+            var movedTransform = new Transform2D(transformA.Position - (intersection * 2)); // move past
 
             NarrowPhase.TestCollision(squareA, movedTransform, squareB, transformB).Should().BeFalse();
         }
@@ -52,7 +52,7 @@ namespace Tests
             intersection.X.Should().BeApproximately(ix, 0.01f);
             intersection.Y.Should().BeApproximately(iy, 0.01f);
 
-            var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
+            var movedTransform = new Transform2D(transformA.Position - (intersection * 2)); // move past
 
             NarrowPhase.TestCollision(circleA, movedTransform, circleB, transformB).Should().BeFalse();
         }
@@ -62,7 +62,7 @@ namespace Tests
         {
             var line = new Line(new Position2D(-4, -4), new Position2D(4, 4));
             var transformA = Transform2D.DefaultTransform;
-            var square = new Rectangle(2, 2);
+            var square = new Rectangle(-1, -1, 2, 2);
             var transformB = Transform2D.DefaultTransform;
 
             var (result, simplex) = NarrowPhase.FindCollisionSimplex(line, transformA, square, transformB);
@@ -71,7 +71,10 @@ namespace Tests
 
             var intersection = NarrowPhase.Intersect(line, transformA, square, transformB, simplex);
 
-            var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
+            intersection.X.Should().Be(1);
+            intersection.Y.Should().Be(-1);
+
+            var movedTransform = new Transform2D(transformA.Position - (intersection * 2)); // move past
 
             NarrowPhase.TestCollision(line, movedTransform, square, transformB).Should().BeFalse();
         }

Test/Equality.cs

@@ -1,8 +1,8 @@
 using NUnit.Framework;
 using FluentAssertions;
 
-using MoonTools.Core.Bonk;
-using MoonTools.Core.Structs;
+using MoonTools.Bonk;
+using MoonTools.Structs;
 using System.Numerics;
 using System.Collections.Immutable;
 
@@ -140,8 +140,8 @@ namespace Tests
             [Test]
             public void RectangleEqual()
             {
-                var a = new Rectangle(3, 3);
-                var b = new Rectangle(3, 3);
+                var a = new Rectangle(-1, -1, 3, 3);
+                var b = new Rectangle(-1, -1, 3, 3);
 
                 a.Equals(b).Should().BeTrue();
             }
@@ -149,8 +149,8 @@ namespace Tests
             [Test]
             public void RectangleEqualOperator()
             {
-                var a = new Rectangle(3, 3);
-                var b = new Rectangle(3, 3);
+                var a = new Rectangle(-1, -1, 3, 3);
+                var b = new Rectangle(-1, -1, 3, 3);
 
                 (a == b).Should().BeTrue();
             }
@@ -158,8 +158,8 @@ namespace Tests
             [Test]
             public void RectangleNotEqual()
             {
-                var a = new Rectangle(3, 3);
-                var b = new Rectangle(6, 6);
+                var a = new Rectangle(-1, -1, 3, 3);
+                var b = new Rectangle(-3, -3, 6, 6);
 
                 a.Equals(b).Should().BeFalse();
             }
@@ -167,8 +167,8 @@ namespace Tests
             [Test]
             public void RectangleNotEqualOperator()
             {
-                var a = new Rectangle(3, 3);
-                var b = new Rectangle(6, 6);
+                var a = new Rectangle(-1, -1, 3, 3);
+                var b = new Rectangle(-3, -3, 6, 6);
 
                 (a != b).Should().BeTrue();
             }

Test/NarrowPhaseTest.cs

@@ -1,6 +1,6 @@
 using NUnit.Framework;
-using MoonTools.Core.Bonk;
-using MoonTools.Core.Structs;
+using MoonTools.Bonk;
+using MoonTools.Structs;
 using System.Numerics;
 using FluentAssertions;
 using System.Collections.Immutable;
@@ -55,7 +55,7 @@ namespace Tests
         public void PointRectangleOverlapping()
         {
             var point = new Point();
-            var rectangle = new Rectangle(4, 4);
+            var rectangle = new Rectangle(-2, -2, 4, 4);
 
             NarrowPhase.TestCollision(point, Transform2D.DefaultTransform, rectangle, Transform2D.DefaultTransform).Should().BeTrue();
         }
@@ -65,7 +65,7 @@ namespace Tests
         {
             var point = new Point();
             var pointTransform = new Transform2D(new Position2D(5, 5));
-            var rectangle = new Rectangle(4, 4);
+            var rectangle = new Rectangle(-2, -2, 4, 4);
 
             NarrowPhase.TestCollision(point, pointTransform, rectangle, Transform2D.DefaultTransform).Should().BeFalse();
         }
@@ -354,10 +354,10 @@ namespace Tests
         [Test]
         public void RectanglesNotOverlapping()
         {
-            var rectangleA = new Rectangle(12, 12);
+            var rectangleA = new Rectangle(-6, -6, 12, 12);
             var transformA = new Transform2D(new Position2D(39, 249));
 
-            var rectangleB = new Rectangle(16, 16);
+            var rectangleB = new Rectangle(-8, -8, 16, 16);
             var transformB = new Transform2D(new Position2D(16, 240));
 
             NarrowPhase.TestCollision(rectangleA, transformA, rectangleB, transformB).Should().BeFalse();
@@ -366,10 +366,10 @@ namespace Tests
         [Test]
         public void RotatedRectanglesOverlapping()
         {
-            var rectangleA = new Rectangle(3, 6);
+            var rectangleA = new Rectangle(-1, -3, 3, 6);
             var transformA = new Transform2D(new Vector2(4f, 0), (float)System.Math.PI / 2);
 
-            var rectangleB = new Rectangle(2, 2);
+            var rectangleB = new Rectangle(-1, -1, 2, 2);
             var transformB = new Transform2D(new Vector2(0, 0));
 
             NarrowPhase.TestCollision(rectangleA, transformA, rectangleB, transformB).Should().BeTrue();
@@ -378,10 +378,10 @@ namespace Tests
         [Test]
         public void RectanglesTouchingGJK2D()
         {
-            var rectangleA = new Rectangle(2, 2);
+            var rectangleA = new Rectangle(-1, -1, 2, 2);
             var transformA = new Transform2D(new Position2D(-1, 0));
 
-            var rectangleB = new Rectangle(2, 2);
+            var rectangleB = new Rectangle(-1, -1, 2, 2);
             var transformB = new Transform2D(new Vector2(1, 0));
 
             NarrowPhase.TestCollision(rectangleA, transformA, rectangleB, transformB).Should().BeTrue();
@@ -390,10 +390,10 @@ namespace Tests
         [Test]
         public void RectanglesOverlappingGJK2D()
         {
-            var rectangleA = new Rectangle(2, 2);
+            var rectangleA = new Rectangle(-1, -1, 2, 2);
             var transformA = new Transform2D(new Position2D(0, 0));
 
-            var rectangleB = new Rectangle(2, 2);
+            var rectangleB = new Rectangle(-1, -1, 2, 2);
             var transformB = new Transform2D(new Vector2(1, 0));
 
             NarrowPhase.TestCollision(rectangleA, transformA, rectangleB, transformB).Should().BeTrue();
@@ -402,10 +402,10 @@ namespace Tests
         [Test]
         public void RectanglesTouchingOverlap()
         {
-            var rectangleA = new Rectangle(2, 2);
+            var rectangleA = new Rectangle(-1, -1, 2, 2);
             var transformA = new Transform2D(new Position2D(-1, 0));
 
-            var rectangleB = new Rectangle(2, 2);
+            var rectangleB = new Rectangle(-1, -1, 2, 2);
             var transformB = new Transform2D(new Vector2(1, 0));
 
             NarrowPhase.TestRectangleOverlap(rectangleA, transformA, rectangleB, transformB).Should().BeTrue();
@@ -414,11 +414,11 @@ namespace Tests
         [Test]
         public void RectanglesOverlappingOverlap()
         {
-            var rectangleA = new Rectangle(2, 2);
+            var rectangleA = new Rectangle(-1, -1, 2, 2);
             var transformA = new Transform2D(new Position2D(0, 0));
 
-            var rectangleB = new Rectangle(2, 2);
-            var transformB = new Transform2D(new Vector2(1, 0));
+            var rectangleB = new Rectangle(-1, -1, 2, 2);
+            var transformB = new Transform2D(new Vector2(1, 0), 0, new Vector2(-1, 1));
 
             NarrowPhase.TestRectangleOverlap(rectangleA, transformA, rectangleB, transformB).Should().BeTrue();
         }
@@ -428,18 +428,18 @@ namespace Tests
         {
             var multiRectangleA = new MultiShape(
                 ImmutableArray.Create<(IShape2D, Transform2D)>(
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 0))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 1))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 2)))
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 0))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 1))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 2)))
                 )
             );
             var transformA = new Transform2D(new Position2D(5, 0));
 
             var multiRectangleB = new MultiShape(
                 ImmutableArray.Create<(IShape2D, Transform2D)>(
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, -1))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, 0))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, 1)))
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, -1))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, 0))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, 1)))
                 )
             );
             var transformB = new Transform2D(new Position2D(0, 3));
@@ -452,18 +452,18 @@ namespace Tests
         {
             var multiRectangleA = new MultiShape(
                 ImmutableArray.Create<(IShape2D, Transform2D)>(
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 0))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 1))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-5, 2)))
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 0))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 1))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-5, 2)))
                 )
             );
             var transformA = new Transform2D(new Position2D(5, 0));
 
             var multiRectangleB = new MultiShape(
                 ImmutableArray.Create<(IShape2D, Transform2D)>(
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, -1))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, 0))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(4, 1)))
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, -1))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, 0))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(4, 1)))
                 )
             );
             var transformB = new Transform2D(new Position2D(0, -3));

Test/SpatialHashTest.cs

@@ -1,7 +1,7 @@
 using FluentAssertions;
 using NUnit.Framework;
-using MoonTools.Core.Structs;
-using MoonTools.Core.Bonk;
+using MoonTools.Structs;
+using MoonTools.Bonk;
 using System.Numerics;
 using System.Collections.Immutable;
 
@@ -14,16 +14,16 @@ namespace Tests
         {
             var spatialHash = new SpatialHash<int>(16);
 
-            var rectA = new Rectangle(4, 4);
+            var rectA = new Rectangle(-2, -2, 4, 4);
             var rectATransform = new Transform2D(new Vector2(-8, -8));
 
-            var rectB = new Rectangle(4, 4);
+            var rectB = new Rectangle(-2, -2, 4, 4);
             var rectBTransform = new Transform2D(new Vector2(8, 8));
 
-            var rectC = new Rectangle(4, 4);
+            var rectC = new Rectangle(-2, -2, 4, 4);
             var rectCTransform = new Transform2D(new Vector2(24, -4));
 
-            var rectD = new Rectangle(4, 4);
+            var rectD = new Rectangle(-2, -2, 4, 4);
             var rectDTransform = new Transform2D(new Vector2(24, 24));
 
             var circleA = new Circle(2);
@@ -40,9 +40,9 @@ namespace Tests
 
             var multiRectangle = new MultiShape(
                 ImmutableArray.Create<(IShape2D, Transform2D)>(
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-2, -2))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-2, -1))),
-                    (new Rectangle(4, 1), new Transform2D(new Position2D(-2, 0)))
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-2, -2))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-2, -1))),
+                    (new Rectangle(-2, 0, 4, 1), new Transform2D(new Position2D(-2, 0)))
                 )
             );
             var multiRectangleTransform = new Transform2D(new Position2D(8, 8));
@@ -78,13 +78,13 @@ namespace Tests
         {
             var spatialHash = new SpatialHash<int>(16);
 
-            var rectA = new Rectangle(4, 4);
+            var rectA = new Rectangle(-2, -2, 4, 4);
             var rectATransform = new Transform2D(new Vector2(-8, -8));
 
-            var rectB = new Rectangle(4, 4);
+            var rectB = new Rectangle(-2, -2, 4, 4);
             var rectBTransform = new Transform2D(new Vector2(-8, -8));
 
-            var rectC = new Rectangle(2, 2);
+            var rectC = new Rectangle(-2, -2, 2, 2);
             var rectCTransform = new Transform2D(new Vector2(-8, -8));
 
             spatialHash.Insert(0, rectA, rectATransform);
@@ -99,10 +99,10 @@ namespace Tests
         {
             var spatialHash = new SpatialHash<int>(16);
 
-            var rectA = new Rectangle(4, 4);
+            var rectA = new Rectangle(-2, -2, 4, 4);
             var rectATransform = new Transform2D(new Vector2(-8, -8));
 
-            var rectB = new Rectangle(4, 4);
+            var rectB = new Rectangle(-2, -2, 4, 4);
             var rectBTransform = new Transform2D(new Vector2(8, 8));
 
             spatialHash.Insert(0, rectA, rectATransform);

Test/SweepTestTest.cs

@@ -1,7 +1,7 @@
 using System.Numerics;
 using FluentAssertions;
-using MoonTools.Core.Bonk;
-using MoonTools.Core.Structs;
+using MoonTools.Bonk;
+using MoonTools.Structs;
 using NUnit.Framework;
 
 namespace Tests
@@ -11,24 +11,32 @@ namespace Tests
         [Test]
         public void SweepsThrough()
         {
-            var rectangle = new Rectangle(4, 4);
+            var rectangle = new Rectangle(-2, -2, 4, 4);
             var transform = new Transform2D(new Position2D(-6, 0));
 
-            var otherRectangle = new Rectangle(4, 4);
+            var otherRectangle = new Rectangle(-2, -2, 4, 4);
             var otherTransform = new Transform2D(new Position2D(6, 0));
 
-            var farthestRectangle = new Rectangle(4, 4);
+            var farthestRectangle = new Rectangle(-2, -2, 4, 4);
             var farthestTransform = new Transform2D(new Position2D(12, 0));
 
+            var downRectangle = new Rectangle(-6, -2, 12, 4);
+            var downTransform = new Transform2D(new Position2D(-6, 20));
+
             var spatialHash = new SpatialHash<int>(16);
             spatialHash.Insert(1, otherRectangle, otherTransform);
             spatialHash.Insert(2, farthestRectangle, farthestTransform);
+            spatialHash.Insert(3, downRectangle, downTransform);
 
-            SweepTest.Rectangle(spatialHash, rectangle, transform, new Vector2(12, 0)).Should().Be(
-                new SweepResult<int, Rectangle>(true, new Vector2(8, 0), 1, otherRectangle, otherTransform)
+            SweepTest.Test(spatialHash, rectangle, transform, new Vector2(12, 0)).Should().Be(
+                new SweepResult<int>(true, new Vector2(7, 0), 1)
             );
 
-            SweepTest.Rectangle(spatialHash, rectangle, transform, new Vector2(-12, 0)).Hit.Should().BeFalse();
+            SweepTest.Test(spatialHash, rectangle, transform, new Vector2(-12, 0)).Hit.Should().BeFalse();
+
+            SweepTest.Test(spatialHash, rectangle, transform, new Vector2(0, 20)).Should().Be(
+                new SweepResult<int>(true, new Vector2(0, 15), 3)
+            );
         }
     }
 }

Test/Test.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>