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 override void Keyboard(KeyboardManager keyboardManager)
{
// Add Circles
if (keyboardManager.IsNewKeyPress(Keys.Q))
{
AddCircle(3, 8);
}
// Add Circles
if (keyboardManager.IsNewKeyPress(Keys.W))
{
AddCircle(4, 16);
}
// Add Circles
if (keyboardManager.IsNewKeyPress(Keys.E))
{
AddCircle(5, 32);
}
// Add Rectangle
if (keyboardManager.IsNewKeyPress(Keys.A))
{
AddRectangle(4, 8);
}
// Add Rectangle
if (keyboardManager.IsNewKeyPress(Keys.S))
{
AddRectangle(5, 2);
}
// Add Rectangle
if (keyboardManager.IsNewKeyPress(Keys.D))
{
AddRectangle(2, 5);
}
// Perform a Union
if (keyboardManager.IsNewKeyPress(Keys.Space))
{
if (_subject != null && _clip != null)
{
DoBooleanOperation(YuPengClipper.Union(_subject, _clip, out _err));
}
}
// Perform a Subtraction
if (keyboardManager.IsNewKeyPress(Keys.Back))
{
if (_subject != null && _clip != null)
{
DoBooleanOperation(YuPengClipper.Difference(_subject, _clip, out _err));
}
}
// Perform a Intersection
if (keyboardManager.IsNewKeyPress(Keys.LeftShift))
{
if (_subject != null && _clip != null)
{
DoBooleanOperation(YuPengClipper.Intersect(_subject, _clip, out _err));
}
}
// Select Subject
if (keyboardManager.IsNewKeyPress(Keys.D1))
{
if (_selected != null)
{
if (_clip == _selected)
{
_clip = null;
}
_subject = _selected;
}
}
// Select Clip
if (keyboardManager.IsNewKeyPress(Keys.D2))
{
if (_selected != null)
{
if (_subject == _selected)
{
_subject = null;
}
_clip = _selected;
}
}
}
protected override void OnKeyDown(KeyEventArgs e)
{
// Add Circles
if (e.KeyCode == Keys.Q)
{
AddCircle(3, 8);
}
// Add Circles
if (e.KeyCode == Keys.W)
{
AddCircle(4, 16);
}
// Add Circles
if (e.KeyCode == Keys.E)
{
AddCircle(5, 32);
}
// Add Rectangle
if (e.KeyCode == Keys.A)
{
AddRectangle(4, 8);
}
// Add Rectangle
if (e.KeyCode == Keys.S)
{
AddRectangle(5, 2);
}
// Add Rectangle
if (e.KeyCode == Keys.D)
{
AddRectangle(2, 5);
}
// Perform a Union
if (e.KeyCode == Keys.Space)
{
if (_subject != null && _clip != null)
{
PolyClipError _err;
DoBooleanOperation(YuPengClipper.Union(_subject, _clip, out _err));
}
}
// Perform a Subtraction
if (e.KeyCode == Keys.Back)
{
if (_subject != null && _clip != null)
{
PolyClipError _err;
DoBooleanOperation(YuPengClipper.Difference(_subject, _clip, out _err));
}
}
// Perform a Intersection
if (e.KeyCode == Keys.LeftShift)
{
if (_subject != null && _clip != null)
{
PolyClipError _err;
DoBooleanOperation(YuPengClipper.Intersect(_subject, _clip, out _err));
}
}
// Select Subject
if (e.KeyCode == Keys.D1)
{
if (_selected != null)
{
if (_clip == _selected)
{
_clip = null;
}
_subject = _selected;
}
}
// Select Clip
if (e.KeyCode == Keys.D2)
{
if (_selected != null)
{
if (_subject == _selected)
{
_subject = null;
}
_clip = _selected;
}
}
}
