private void Explode()
{
Vector2 min = _mousePos - new Vector2(Radius);
Vector2 max = _mousePos + new Vector2(Radius);
AABB affected = new AABB(ref min, ref max);
System.Collections.Generic.List <Fixture> affectedFixtures = new System.Collections.Generic.List <Fixture>();
World.QueryAABB(fixture =>
{
affectedFixtures.Add(fixture);
return(true);
}, ref affected);
HashSet <Body> uniqueBodies = new HashSet <Body>();
foreach (Fixture f in affectedFixtures)
{
uniqueBodies.Add(f.Body);
}
foreach (Body body in uniqueBodies)
{
//Check if body is a Destructablebody)
if (body.UserData is DestructableBody)
{
//Clip the destructablebody against the clip shape
DestructableBody db = (DestructableBody)body.UserData;
db.Clip(_clipCircle, _mousePos);
}
}
}
public bool Clip(Vertices clipVertices, Vector2 position)
{
Rot rot = new Rot(0);
Transform t = new Transform(ref position, ref rot);
//Transform shape
Transform thistransform;
Body.GetTransform(out thistransform);
//Transform the shape
Vertices transformedshape = new Vertices(clipVertices.Count);
foreach (Vector2 v in clipVertices)
{
Vector2 newv = v;
newv = MathUtils.Mul(ref t, ref newv);
newv = MathUtils.MulT(ref thistransform, ref newv);
transformedshape.Add(newv);
}
PolyClipError error;
List <Vertices> result = YuPengClipper.Difference(Vertices, transformedshape, out error);
if (error != PolyClipError.None)
{
return(false);
}
//Need to check if the entire shape was cut,
//so we can destroy/erase it
if (result.Count == 0)
{
return(false);
}
//The shape was split up,
//so create a new DestructableBody for each piece
if (result.Count > 1)
{
//Create a new destructable body for each extra shape
for (int i = 1; i < result.Count; i++)
{
DestructableBody db = new DestructableBody(_world, result[i]);
db.Body.Position = Body.Position;
}
}
//Set Shape
Vertices newshape = result[0];
SetShape(newshape);
return(true);
}
public bool Clip(Vertices clipVertices, Vector2 position)
{
Mat22 mat = new Mat22(0);
Transform t = new Transform(ref position, ref mat);
//Transform shape
Transform thistransform;
Body.GetTransform(out thistransform);
//Transform the shape
Vertices transformedshape = new Vertices(clipVertices.Count);
foreach (Vector2 v in clipVertices)
{
Vector2 newv = v;
newv = MathUtils.Multiply(ref t, ref newv);
newv = MathUtils.MultiplyT(ref thistransform, ref newv);
transformedshape.Add(newv);
}
PolyClipError error;
List<Vertices> result = YuPengClipper.Difference(Vertices, transformedshape, out error);
//Need to check if the entire shape was cut,
//so we can destroy/erase it
if (result.Count == 0)
return false;
//The shape was split up,
//so create a new DestructableBody for each piece
if (result.Count > 1)
{
//Create a new destructable body for each extra shape
for (int i = 1; i < result.Count; i++)
{
DestructableBody db = new DestructableBody(_world, result[i]);
db.Body.Position = Body.Position;
}
}
//Set Shape
Vertices newshape = result[0];
SetShape(newshape);
return true;
}
private DestructibleTerrainYuPengTest()
{
Settings.MaxPolygonVertices = 16;
//Ground
BodyFactory.CreateEdge(World, new Vector2(-40.0f, 0.0f), new Vector2(40.0f, 0.0f));
//Create 7 blocks
const float size = 2.0f;
Vertices v = PolygonTools.CreateRectangle(size, size);
for (int i = 0; i < 7; ++i)
{
DestructableBody db = new DestructableBody(World, v);
db.Body.Position = new Vector2(-15.0f + size * 3 * i, 20.0f);
}
Radius = 3;
}
private DestructibleTerrainYuPengTest()
{
Settings.MaxPolygonVertices = 16;
//Ground
BodyFactory.CreateEdge(World, new Vector2(-40.0f, 0.0f), new Vector2(40.0f, 0.0f));
//Create 7 blocks
const float size = 2.0f;
Vertices v = PolygonTools.CreateRectangle(size, size);
for (int i = 0; i < 7; ++i)
{
DestructableBody db = new DestructableBody(World, v);
db.Body.Position = new Vector2(-15.0f + size * 3 * i, 20.0f);
}
Radius = 3;
}