internal static bool ChamferPolygons(List <Polygon> polygons, List <Edge> edges, float distance, int iterations, out List <Polygon> resultPolygons)
{
// list of clipping planes.
List <Plane> clippingPlanes = new List <Plane>();
// iterate through all edges and calculate the clipping planes.
for (int e = 0; e < edges.Count; e++)
{
Edge edge = edges[e];
// find the two polygons connected to the edge.
Polygon[] matchingPolygons = polygons.Where(p => Polygon.ContainsEdge(p, edge)).ToArray();
if (matchingPolygons.Length != 2)
{
resultPolygons = null; return(false);
}
;
// find the actual edges on the polygons (which helps determine their direction for the chamfer).
Edge realEdge1;
Polygon.FindEdge(matchingPolygons[0], edge, out realEdge1);
Edge realEdge2;
Polygon.FindEdge(matchingPolygons[1], edge, out realEdge2);
// calculate clipping plane position:
Vector3 v1 = realEdge1.Vertex1.Position - ChamferPolygons_GetNormal(realEdge1.Vertex1.Position, realEdge1.Vertex2.Position, matchingPolygons[0].GetCenterPoint()).normalized *distance;
Vector3 v2 = realEdge1.Vertex2.Position - ChamferPolygons_GetNormal(realEdge1.Vertex1.Position, realEdge1.Vertex2.Position, matchingPolygons[0].GetCenterPoint()).normalized *distance;
Vector3 v3 = realEdge2.Vertex2.Position - ChamferPolygons_GetNormal(realEdge2.Vertex1.Position, realEdge2.Vertex2.Position, matchingPolygons[1].GetCenterPoint()).normalized *distance;
for (int i = 0; i < iterations; i++)
{
float t = (1.0f / iterations);
Vector3 p1 = ShapeEditor.Bezier.GetPoint(v1, realEdge1.Vertex1.Position, v3, t * i);
Vector3 p2 = ShapeEditor.Bezier.GetPoint(v1, realEdge1.Vertex1.Position, v3, t * (i + 1));
clippingPlanes.Add(new Plane(
p1,
p2,
p1 + (v1 - v2).normalized
));
}
}
// copy the input polygons.
resultPolygons = polygons.DeepCopy();
// clip the polygons.
for (int i = 0; i < clippingPlanes.Count; i++)
{
List <Polygon> polygonsFront;
List <Polygon> polygonsBack;
if (SplitPolygonsByPlane(resultPolygons, clippingPlanes[i], false, out polygonsFront, out polygonsBack))
{
resultPolygons = polygonsFront;
}
}
return(true);
}
