private static DebugColor SpaceDebugDrawColorForShapeCallback(cpShape handleShape, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
var shape = Shape.FromHandle(handleShape);
return(debugDraw.ColorForShape(shape));
}
private static void SpaceDebugDrawPolygonCallback(int count, cpVertPointer verts, double radius, DebugColor outlineColor, DebugColor fillColor, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
Vect[] vectors = NativeInterop.PtrToStructureArray <Vect>(verts, count);
debugDraw.DrawPolygon(vectors, radius, outlineColor, fillColor);
}
/// <summary>
/// Calculate the moment of inertia for a solid polygon shape assuming its center of gravity
/// is at its centroid. The offset is added to each vertex.
/// </summary>
public static double MomentForPolygon(double mass, IReadOnlyList <Vect> vertices, Vect offset, double radius)
{
IntPtr verticesPtr = NativeInterop.StructureArrayToPtr(vertices);
double moment = NativeMethods.cpMomentForPoly(mass, vertices.Count, verticesPtr, offset, radius);
NativeInterop.FreeStructure(verticesPtr);
return(moment);
}
/// <summary>
/// Calculate the natural centroid of a polygon.
/// </summary>
public static Vect CentroidForPoly(IReadOnlyList <Vect> vertices)
{
IntPtr verticesPtr = NativeInterop.StructureArrayToPtr(vertices);
Vect centroid = NativeMethods.cpCentroidForPoly(vertices.Count, verticesPtr);
NativeInterop.FreeStructure(verticesPtr);
return(centroid);
}
/// <summary>
/// Calculate the signed area of this polygon. Vertices specified such that they connect in
/// a clockwise fashion (called winding) give a positive area measurement. This is probably
/// backwards to what you might expect.
/// </summary>
public static double AreaForPoly(IReadOnlyList <Vect> vertices, double radius)
{
IntPtr verticesPtr = NativeInterop.StructureArrayToPtr(vertices);
double area = NativeMethods.cpAreaForPoly(vertices.Count, verticesPtr, radius);
NativeInterop.FreeStructure(verticesPtr);
return(area);
}
private IntPtr ToPointer()
{
IntPtr drawOptionsPtr = NativeInterop.AllocStructure <cpSpaceDebugDrawOptions>();
#if NETFRAMEWORK
Marshal.StructureToPtr(this, drawOptionsPtr, false);
#else
Marshal.StructureToPtr <cpSpaceDebugDrawOptions>(this, drawOptionsPtr, false);
#endif
return(drawOptionsPtr);
}
private static IntPtr CreatePolygonShape(Body body, Vect[] verts, double radius)
{
Debug.Assert(verts.Length > 2);
IntPtr ptrVectors = NativeInterop.StructureArrayToPtr(verts);
IntPtr handle = NativeMethods.cpPolyShapeNewRaw(body.Handle, verts.Length, ptrVectors, radius);
NativeInterop.FreeStructure(ptrVectors);
return(handle);
}
private static IntPtr CreatePolygonShape(Body body, IReadOnlyList <Vect> verts, Transform transform, double radius)
{
Debug.Assert(verts.Count > 2);
IntPtr ptrVectors = NativeInterop.StructureArrayToPtr(verts);
IntPtr handle = NativeMethods.cpPolyShapeNew(body.Handle, verts.Count, ptrVectors, transform, radius);
NativeInterop.FreeStructure(ptrVectors);
return(handle);
}
private CollisionHandler(cpCollisionHandlerPointer collisionHandle, ref cpCollisionHandler handler)
{
handle = collisionHandle;
IntPtr data = NativeInterop.RegisterHandle(this);
handler.userData = data;
TypeA = (int)handler.typeA;
TypeB = (int)handler.typeB;
cpCollisionHandler.ToPointer(handler, handle);
}
internal static CollisionHandler <T> GetOrCreate(cpCollisionHandlerPointer collisionHandle)
{
Debug.Assert(collisionHandle != IntPtr.Zero, "CollisionHandle cannot be zero");
var handler = cpCollisionHandler.FromHandle(collisionHandle);
if (handler.userData != IntPtr.Zero)
{
return(NativeInterop.FromIntPtr <CollisionHandler <T> >(handler.userData));
}
return(new CollisionHandler <T>(collisionHandle, ref handler));
}
public IntPtr AcquireDebugDrawOptions(IDebugDraw debugDraw, DebugDrawFlags flags, DebugDrawColors colors)
{
this.flags = (int)flags;
collisionPointColor = colors.CollisionPoint;
constraintColor = colors.Constraint;
shapeOutlineColor = colors.ShapeOutline;
drawCircle = spaceDebugDrawCircleCallback.ToFunctionPointer();
drawSegment = spaceDebugDrawSegmentCallback.ToFunctionPointer();
drawFatSegment = spaceDebugDrawFatSegmentCallback.ToFunctionPointer();
drawPolygon = spaceDebugDrawPolygonCallback.ToFunctionPointer();
drawDot = spaceDebugDrawDotCallback.ToFunctionPointer();
colorForShape = spaceDebugDrawColorForShapeCallback.ToFunctionPointer();
data = NativeInterop.RegisterHandle(debugDraw);
return(ToPointer());
}
/// <summary>
/// Get a Constraint object from a native handle.
/// </summary>
public static Constraint FromHandle(cpConstraint constraint)
{
cpDataPointer handle = NativeMethods.cpConstraintGetUserData(constraint);
return(NativeInterop.FromIntPtr <Constraint>(handle));
}
void ReleaseUserData()
{
cpDataPointer pointer = NativeMethods.cpConstraintGetUserData(constraint);
NativeInterop.ReleaseHandle(pointer);
}
void RegisterUserData()
{
cpDataPointer pointer = NativeInterop.RegisterHandle(this);
NativeMethods.cpSpaceSetUserData(space, pointer);
}
void ReleaseUserData()
{
cpDataPointer pointer = NativeMethods.cpBodyGetUserData(body);
NativeInterop.ReleaseHandle(pointer);
}
private static void SpaceDebugDrawFatSegmentCallback(Vect a, Vect b, double radius, DebugColor outlineColor, DebugColor fillColor, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
debugDraw.DrawFatSegment(a, b, radius, outlineColor, fillColor);
}
/// <summary>
/// Get a <see cref="Body"/> object from a native cpBody handle.
/// </summary>
public static Body FromHandle(cpBody body)
{
cpDataPointer handle = NativeMethods.cpBodyGetUserData(body);
return(NativeInterop.FromIntPtr <Body>(handle));
}
private static void SpaceDebugDrawSegmentCallback(Vect a, Vect b, DebugColor color, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
debugDraw.DrawSegment(a, b, color);
}
private static void SpaceDebugDrawDotCallback(double size, Vect pos, DebugColor color, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
debugDraw.DrawDot(size, pos, color);
}
/// <summary>
/// Register managed object in the native user data.
/// </summary>
protected void RegisterUserData()
{
cpDataPointer pointer = NativeInterop.RegisterHandle(this);
NativeMethods.cpShapeSetUserData(shape, pointer);
}
void RegisterUserData()
{
cpDataPointer pointer = NativeInterop.RegisterHandle(this);
NativeMethods.cpBodySetUserData(body, pointer);
}
void ReleaseUserData()
{
cpDataPointer pointer = NativeMethods.cpShapeGetUserData(shape);
NativeInterop.ReleaseHandle(pointer);
}
/// <summary>
/// Get a managed Shape from a native handle.
/// </summary>
public static Shape FromHandle(cpShape shape)
{
cpDataPointer handle = NativeMethods.cpShapeGetUserData(shape);
return(NativeInterop.FromIntPtr <Shape>(handle));
}
public void ReleaseDebugDrawOptions(IntPtr debugDrawOptionsPointer)
{
NativeInterop.ReleaseHandle(data);
NativeInterop.FreeStructure(debugDrawOptionsPointer);
}
/// <summary>
/// Register managed object to native user data.
/// </summary>
internal protected void RegisterUserData()
{
cpDataPointer pointer = NativeInterop.RegisterHandle(this);
NativeMethods.cpConstraintSetUserData(constraint, pointer);
}
private static void SpaceDebugDrawCircleCallback(Vect pos, double angle, double radius, DebugColor outlineColor, DebugColor fillColor, voidptr_t data)
{
IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);
debugDraw.DrawCircle(pos, angle, radius, outlineColor, fillColor);
}
/// <summary>
/// Get a Space object from native cpSpace handle.
/// </summary>
public static Space FromHandle(cpSpace space)
{
cpDataPointer handle = NativeMethods.cpSpaceGetUserData(space);
return(NativeInterop.FromIntPtr <Space>(handle));
}