private void Decompose()
{
//Unsubsribe from the PostSolve delegate
_world.ContactManager.PostSolve -= PostSolve;
for (int i = 0; i < Parts.Count; i++)
{
FSFixture fixture = Parts[i];
Shape shape = fixture.Shape.Clone();
object userdata = fixture.UserData;
MainBody.DestroyFixture(fixture);
FSBody body = BodyFactory.CreateBody(_world);
body.BodyType = BodyType.Dynamic;
body.Position = MainBody.Position;
body.Rotation = MainBody.Rotation;
body.UserData = MainBody.UserData;
body.CreateFixture(shape, userdata);
body.AngularVelocity = _angularVelocitiesCache[i];
body.LinearVelocity = _velocitiesCache[i];
}
_world.RemoveBody(MainBody);
_world.RemoveBreakableBody(this);
}
public FSBreakableBody(IEnumerable<Vertices> vertices, FSWorld world, float density, object userData)
{
_world = world;
_world.ContactManager.PostSolve += PostSolve;
MainBody = new FSBody(_world);
MainBody.BodyType = BodyType.Dynamic;
foreach (Vertices part in vertices)
{
PolygonShape polygonShape = new PolygonShape(part, density);
FSFixture fixture = MainBody.CreateFixture(polygonShape, userData);
Parts.Add(fixture);
}
}
public FSBreakableBody(IEnumerable <Vertices> vertices, FSWorld world, float density, object userData)
{
_world = world;
_world.ContactManager.PostSolve += PostSolve;
MainBody = new FSBody(_world);
MainBody.BodyType = BodyType.Dynamic;
foreach (Vertices part in vertices)
{
PolygonShape polygonShape = new PolygonShape(part, density);
FSFixture fixture = MainBody.CreateFixture(polygonShape, userData);
Parts.Add(fixture);
}
}
/// <summary>
/// Duplicates the given Body along the given path for approximatly the given copies.
/// </summary>
/// <param name="world">The world.</param>
/// <param name="path">The path.</param>
/// <param name="shapes">The shapes.</param>
/// <param name="type">The type.</param>
/// <param name="copies">The copies.</param>
/// <param name="userData"></param>
/// <returns></returns>
public static List<FSBody> EvenlyDistributeShapesAlongPath(FSWorld world, Path path, IEnumerable<Shape> shapes,
BodyType type, int copies, object userData)
{
List<FVector3> centers = path.SubdivideEvenly(copies);
List<FSBody> bodyList = new List<FSBody>();
for (int i = 0; i < centers.Count; i++)
{
FSBody b = new FSBody(world);
// copy the type from original body
b.BodyType = type;
b.Position = new FVector2(centers[i].X, centers[i].Y);
b.Rotation = centers[i].Z;
foreach (Shape shape in shapes)
{
b.CreateFixture(shape, userData);
}
bodyList.Add(b);
}
return bodyList;
}
/// <summary>
/// Convert a closed path into a polygon.
/// Convex decomposition is automatically performed.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="body">The body.</param>
/// <param name="density">The density.</param>
/// <param name="subdivisions">The subdivisions.</param>
public static void ConvertPathToPolygon(Path path, FSBody body, float density, int subdivisions)
{
if (!path.Closed)
throw new Exception("The path must be closed to convert to a polygon.");
List<FVector2> verts = path.GetVertices(subdivisions);
List<Vertices> decomposedVerts = EarclipDecomposer.ConvexPartition(new Vertices(verts));
//List<Vertices> decomposedVerts = BayazitDecomposer.ConvexPartition(new Vertices(verts));
foreach (Vertices item in decomposedVerts)
{
body.CreateFixture(new PolygonShape(item, density));
}
}
//Contributed by Matthew Bettcher
/// <summary>
/// Convert a path into a set of edges and attaches them to the specified body.
/// Note: use only for static edges.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="body">The body.</param>
/// <param name="subdivisions">The subdivisions.</param>
public static void ConvertPathToEdges(Path path, FSBody body, int subdivisions)
{
Vertices verts = path.GetVertices(subdivisions);
if (path.Closed)
{
ChainShape chain = new ChainShape(verts);
body.CreateFixture(chain);
}
else
{
for (int i = 1; i < verts.Count; i++)
{
body.CreateFixture(new EdgeShape(verts[i], verts[i - 1]));
}
}
}
