internal void ComputeVertexNormal(int vertId, ref double[] nml)
{
for (var i = 0; i < 3; i++)
{
nml[i] = 0.0;
}
var star = faceLinks[vertId];
foreach (var faceId in star)
{
var faceNml = new double[3];
ComputeFaceNormal(faceId, ref faceNml, false);
MxVectorOps.AddInto3(ref nml, faceNml);
}
if (star.Count > 1)
{
MxVectorOps.Unitize3(ref nml);
}
}
internal void ApplyContraction(MxPairContraction conx)
{
var vertId1 = conx.VertId1;
var vertId2 = conx.VertId2;
// Move vert1 to new position
var pos = Vertex(vertId1).Pos;
MxVectorOps.AddInto3(ref pos, conx.DeltaV1);
Vertex(vertId1).Pos = pos;
// Remove dead faces
foreach (var faceId in conx.DeadFaces)
{
UnLinkFace(faceId);
}
// Modify changed faces
for (var i = conx.DeltaPivot; i < conx.DeltaFaces.Count; i++)
{
var faceId = conx.DeltaFaces[i];
var face = Face(faceId);
face.RemapVertex(vertId2, vertId1);
faceLinks[vertId1].Add(faceId);
}
if (NormalBinding == MxBinding.PerFace)
{
var nml = new double[3];
foreach (var faceId in conx.DeltaFaces)
{
ComputeFaceNormal(faceId, ref nml);
Normal(faceId, new MxNormal(nml));
}
}
// Remove v2
VertexMarkInvalid(vertId2);
faceLinks[vertId2].Clear();
}
