private void AssignTriangles(bool[] vertexAbovePlane, Vector3 pointOnPlane, Vector3 planeNormal, out IList <Vector3> cutEdges)
{
cutEdges = new List <Vector3>();
int triangleCount = indices.Count / 3;
for (int i = 0; i < triangleCount; i++)
{
int index0 = indices[i * 3 + 0];
int index1 = indices[i * 3 + 1];
int index2 = indices[i * 3 + 2];
bool above0 = vertexAbovePlane[index0];
bool above1 = vertexAbovePlane[index1];
bool above2 = vertexAbovePlane[index2];
if ((above0 && above1 && above2) || (!above0 && !above1 && !above2) || tri_backlist.Contains(i))
{
// 保持不变
indices2.Add(index0);
indices2.Add(index1);
indices2.Add(index2);
//Debug.LogFormat("{0} {1} {2}", index0, index1, index2);
}
else
{
//continue;
// Split triangle
int top, cw, ccw;
if (above1 == above2 && above0 != above1)
{
top = index0;
cw = index1;
ccw = index2;
}
else if (above2 == above0 && above1 != above2)
{
top = index1;
cw = index2;
ccw = index0;
}
else
{
top = index2;
cw = index0;
ccw = index1;
}
Vector3 cutVertex0, cutVertex1;
//Debug.LogFormat ("{0} above {1}", top, vertexAbovePlane[top]);
if (vertexAbovePlane[top])
{
SplitTriangle(pointOnPlane, planeNormal, i, top, cw, ccw, true, out cutVertex0, out cutVertex1);
}
else
{
SplitTriangle(pointOnPlane, planeNormal, i, top, cw, ccw, false, out cutVertex1, out cutVertex0);
}
// Add cut edge
if (cutVertex0 != cutVertex1)
{
cutEdges.Add(cutVertex0);
cutEdges.Add(cutVertex1);
//Debug.LogFormat ("{0} cutedge {1} {2}", i, cutVertex0, cutVertex1);
}
// ADD remove springs
softbody.RemoveMassSpring(top, cw);
softbody.RemoveMassSpring(top, ccw);
}
}
}