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;
}
}
}
protected virtual void MergePolygons(IEnumerable <Polygon> polygons, ObstacleCollection obstacles)
{
var filledPolygons = new List <Vertices>();
var mergedPolygons = new List <Vertices>();
foreach (var polygon in polygons)
{
if (polygon.CheckIfFilled(Map, Layer, obstacles))
{
filledPolygons.Add(polygon);
}
else
{
AddLineObstacles(polygon, obstacles, Layer);
}
}
while (filledPolygons.Count > 0)
{
var polygon = filledPolygons.First();
var changed = true;
while (changed)
{
changed = false;
var index = 0;
while (index < filledPolygons.Count)
{
var polygon2 = filledPolygons[index];
var error = PolyClipError.None;
var combinedPolygons = polygon == polygon2 ? new List <Vertices> {
polygon
} : YuPengClipper.Union(polygon2, polygon, out error);
if (combinedPolygons.Count == 0)
{
//sometimes a polygon is a subset of the other polygon. Try to check that...
Vertices biggerPolygon;
if (VerticesEx.IsPolygonSubsetOf(polygon, polygon2, out biggerPolygon))
{
combinedPolygons = new List <Vertices> {
biggerPolygon
};
error = PolyClipError.None; //we could recover it...
}
}
//if (combinedPolygons.Count > 2)
// //the polygons intersect at several points, we ignore them as this would lead to holes...
//if (error != PolyClipError.None)
// //some error occurred, so we igore this union process...
if (combinedPolygons.Count == 1) //they intersect
{
filledPolygons.Remove(polygon2);
changed = true;
polygon = SimplifyTools.CollinearSimplify(combinedPolygons[0]);
}
else //combinedPolygons.Count > 1 --> they don't intersect (or may do at several points, but we ignore it )
{
index++;
}
}
}
mergedPolygons.Add(polygon);
}
foreach (var mergedPolygon in mergedPolygons)
{
AddPolygonObstacle(mergedPolygon, VerticesEx.IsRectangle(mergedPolygon), obstacles, Layer);
}
}
