protected virtual void BuildMesh_NoMerge(STLSolid solid, IMeshBuilder builder)
{
/*int meshID = */ builder.AppendNewMesh(false, false, false, false);
DVectorArray3f vertices = solid.Vertices;
int nTris = vertices.Count / 3;
for (int ti = 0; ti < nTris; ++ti)
{
Vector3F va = vertices[3 * ti];
int a = builder.AppendVertex(va.x, va.y, va.z);
Vector3F vb = vertices[3 * ti + 1];
int b = builder.AppendVertex(vb.x, vb.y, vb.z);
Vector3F vc = vertices[3 * ti + 2];
int c = builder.AppendVertex(vc.x, vc.y, vc.z);
builder.AppendTriangle(a, b, c);
}
}
// [TODO] is there any way we could use a HashSet<Vector3f> here, instead of Dictionary?
protected virtual void BuildMesh_IdenticalWeld(STLSolid solid, IMeshBuilder builder)
{
/*int meshID = */ builder.AppendNewMesh(false, false, false, false);
DVectorArray3f vertices = solid.Vertices;
int N = vertices.Count;
int[] mapV = new int[N];
Dictionary <Vector3F, int> uniqueV = new Dictionary <Vector3F, int>();
for (int vi = 0; vi < N; ++vi)
{
Vector3F v = vertices[vi];
int existing_idx;
if (uniqueV.TryGetValue(v, out existing_idx))
{
mapV[vi] = existing_idx;
}
else
{
int vid = builder.AppendVertex(v.x, v.y, v.z);
uniqueV[v] = vid;
mapV[vi] = vid;
}
}
int nTris = N / 3;
for (int ti = 0; ti < nTris; ++ti)
{
int a = mapV[3 * ti];
int b = mapV[3 * ti + 1];
int c = mapV[3 * ti + 2];
builder.AppendTriangle(a, b, c);
}
}