static public void FromVtArray(VtIntArray input, ref int[] output)
{
if (output.Length != input.size())
{
output = UsdIo.ArrayAllocator.Malloc <int>(input.size());
}
unsafe
{
fixed(int *p = output)
{
input.CopyToArray((IntPtr)p);
}
}
}
// Convenience API: generates garbage, do not use when performance matters.
static public int[] FromVtArray(VtIntArray input)
{
int[] output = UsdIo.ArrayAllocator.Malloc <int>(input.size());
FromVtArray(input, ref output);
return(output);
}
public static void TestTriangulation()
{
VtIntArray indices = new VtIntArray();
VtIntArray faceCounts = new VtIntArray();
faceCounts.push_back(5);
indices.push_back(0);
indices.push_back(1);
indices.push_back(2);
indices.push_back(3);
indices.push_back(4);
faceCounts.push_back(4);
indices.push_back(5);
indices.push_back(6);
indices.push_back(7);
indices.push_back(8);
faceCounts.push_back(3);
indices.push_back(9);
indices.push_back(10);
indices.push_back(11);
// Degenerate face.
faceCounts.push_back(2);
indices.push_back(12);
indices.push_back(13);
UsdGeomMesh.Triangulate(indices, faceCounts);
AssertEqual((int)faceCounts.size(), 6);
for (int i = 0; i < faceCounts.size(); i++)
{
AssertEqual((int)faceCounts[i], 3);
}
AssertEqual((int)indices.size(), 18);
AssertEqual(indices[0], 0);
AssertEqual(indices[1], 1);
AssertEqual(indices[2], 2);
AssertEqual(indices[3], 0);
AssertEqual(indices[4], 2);
AssertEqual(indices[5], 3);
AssertEqual(indices[6], 0);
AssertEqual(indices[7], 3);
AssertEqual(indices[8], 4);
AssertEqual(indices[9], 5);
AssertEqual(indices[10], 6);
AssertEqual(indices[11], 7);
AssertEqual(indices[12], 5);
AssertEqual(indices[13], 7);
AssertEqual(indices[14], 8);
AssertEqual(indices[15], 9);
AssertEqual(indices[16], 10);
AssertEqual(indices[17], 11);
}
