static HdMeshTopology
_GenerateCapsuleMeshTopology()
{
int numCounts = _slices * (_stacks + 2 * _hemisphereStacks);
int numIndices = 4 * _slices * _stacks // cylinder quads
+ 4 * 2 * _slices * (_hemisphereStacks-1) // hemisphere quads
+ 3 * 2 * _slices; // end cap tris
VtIntArray countsArray(numCounts);
int * counts = countsArray.data();
VtIntArray indicesArray(numIndices);
int * indices = indicesArray.data();
// populate face counts and face indices
int face = 0, index = 0, p = 0;
// base hemisphere end cap triangles
int base = p++;
for (int i=0; i<_slices; ++i) {
counts[face++] = 3;
indices[index++] = p + (i+1)%_slices;
indices[index++] = p + i;
indices[index++] = base;
}
// middle and hemisphere quads
for (int i=0; i<_stacks+2*(_hemisphereStacks-1); ++i) {
for (int j=0; j<_slices; ++j) {
float x0 = 0;
float x1 = x0 + _slices;
float y0 = j;
float y1 = (j + 1) % _slices;
counts[face++] = 4;
indices[index++] = p + x0 + y0;
indices[index++] = p + x0 + y1;
indices[index++] = p + x1 + y1;
indices[index++] = p + x1 + y0;
}
p += _slices;
}
// top hemisphere end cap triangles
int top = p + _slices;
for (int i=0; i<_slices; ++i) {
counts[face++] = 3;
indices[index++] = p + i;
indices[index++] = p + (i+1)%_slices;
indices[index++] = top;
}
TF_VERIFY(face == numCounts && index == numIndices);
return HdMeshTopology(PxOsdOpenSubdivTokens->catmark,
HdTokens->rightHanded,
countsArray, indicesArray);
}
static HdMeshTopology
_GenerateConeMeshTopology()
{
int numCounts = _slices * _stacks + _slices;
int numIndices = 4 * _slices * _stacks // cone quads
+ 3 * _slices; // end cap triangles
VtIntArray countsArray(numCounts);
int * counts = countsArray.data();
VtIntArray indicesArray(numIndices);
int * indices = indicesArray.data();
// populate face counts and face indices
int face = 0, index = 0, p = 0;
// base end cap triangles
int base = p++;
for (int i=0; i<_slices; ++i) {
counts[face++] = 3;
indices[index++] = p + (i+1)%_slices;
indices[index++] = p + i;
indices[index++] = base;
}
p += _slices;
// cone quads
for (int i=0; i<_stacks; ++i) {
for (int j=0; j<_slices; ++j) {
float x0 = 0;
float x1 = x0 + _slices;
float y0 = j;
float y1 = (j + 1) % _slices;
counts[face++] = 4;
indices[index++] = p + x0 + y0;
indices[index++] = p + x0 + y1;
indices[index++] = p + x1 + y1;
indices[index++] = p + x1 + y0;
}
p += _slices;
}
TF_VERIFY(face == numCounts and index == numIndices);
return HdMeshTopology(PxOsdOpenSubdivTokens->catmark,
HdTokens->rightHanded,
countsArray, indicesArray);
}
void
UsdImagingMeshAdapter::_GetMeshTopology(UsdPrim const& prim,
VtValue* topo,
UsdTimeCode time)
{
HD_TRACE_FUNCTION();
HF_MALLOC_TAG_FUNCTION();
TfToken schemeToken;
_GetPtr(prim, UsdGeomTokens->subdivisionScheme, time, &schemeToken);
*topo = HdMeshTopology(
schemeToken,
_Get<TfToken>(prim, UsdGeomTokens->orientation, time),
_Get<VtIntArray>(prim, UsdGeomTokens->faceVertexCounts, time),
_Get<VtIntArray>(prim, UsdGeomTokens->faceVertexIndices, time),
_Get<VtIntArray>(prim, UsdGeomTokens->holeIndices, time));
}
/*virtual*/
HdMeshTopology
HdSceneDelegate::GetMeshTopology(SdfPath const& id)
{
return HdMeshTopology();
}
