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 void Dispose()
{
if (!IsDisposed)
{
World.RemoveBody(this);
IsDisposed = true;
GC.SuppressFinalize(this);
}
}
/// <summary>
/// This is a high-level function to cuts fixtures inside the given world, using the start and end points.
/// Note: We don't support cutting when the start or end is inside a shape.
/// </summary>
/// <param name="world">The world.</param>
/// <param name="start">The startpoint.</param>
/// <param name="end">The endpoint.</param>
/// <param name="thickness">The thickness of the cut</param>
public static void Cut(FSWorld world, FVector2 start, FVector2 end, float thickness)
{
List <FSFixture> fixtures = new List <FSFixture>();
List <FVector2> entryPoints = new List <FVector2>();
List <FVector2> exitPoints = new List <FVector2>();
//We don't support cutting when the start or end is inside a shape.
if (world.TestPoint(start) != null || world.TestPoint(end) != null)
{
return;
}
//Get the entry points
world.RayCast((f, p, n, fr) =>
{
fixtures.Add(f);
entryPoints.Add(p);
return(1);
}, start, end);
//Reverse the ray to get the exitpoints
world.RayCast((f, p, n, fr) =>
{
exitPoints.Add(p);
return(1);
}, end, start);
//We only have a single point. We need at least 2
if (entryPoints.Count + exitPoints.Count < 2)
{
return;
}
for (int i = 0; i < fixtures.Count; i++)
{
// can't cut circles yet !
if (fixtures[i].Shape.ShapeType != ShapeType.Polygon)
{
continue;
}
if (fixtures[i].Body.BodyType != BodyType.Static)
{
//Split the shape up into two shapes
Vertices first;
Vertices second;
SplitShape(fixtures[i], entryPoints[i], exitPoints[i], thickness, out first, out second);
//Delete the original shape and create two new. Retain the properties of the body.
if (SanityCheck(first))
{
FSBody firstFixture = BodyFactory.CreatePolygon(world, first, fixtures[i].Shape.Density,
fixtures[i].Body.Position);
firstFixture.Rotation = fixtures[i].Body.Rotation;
firstFixture.LinearVelocity = fixtures[i].Body.LinearVelocity;
firstFixture.AngularVelocity = fixtures[i].Body.AngularVelocity;
firstFixture.BodyType = BodyType.Dynamic;
}
if (SanityCheck(second))
{
FSBody secondFixture = BodyFactory.CreatePolygon(world, second, fixtures[i].Shape.Density,
fixtures[i].Body.Position);
secondFixture.Rotation = fixtures[i].Body.Rotation;
secondFixture.LinearVelocity = fixtures[i].Body.LinearVelocity;
secondFixture.AngularVelocity = fixtures[i].Body.AngularVelocity;
secondFixture.BodyType = BodyType.Dynamic;
}
world.RemoveBody(fixtures[i].Body);
}
}
}
