bool GusdXformWrapper::
updateFromGTPrim(const GT_PrimitiveHandle& sourcePrim,
const UT_Matrix4D& localXform,
const GusdContext& ctxt,
GusdSimpleXformCache& xformCache)
{
if( !m_usdXformForWrite )
return false;
DBG( cout << "GusdXformWrapper::updateFromGTPrim, primType = " << sourcePrim->className() << endl );
return updateGroupFromGTPrim( m_usdXformForWrite, sourcePrim, localXform, ctxt, xformCache );
}
void
GusdRefiner::addPrimitive( const GT_PrimitiveHandle& gtPrimIn )
{
if(!gtPrimIn) {
std::cout << "Attempting to add invalid prim" << std::endl;
return;
}
GT_PrimitiveHandle gtPrim = gtPrimIn; // copy to a non-const handle
int primType = gtPrim->getPrimitiveType();
DBG( cerr << "GusdRefiner::addPrimitive, " << gtPrim->className() << endl );
string primName;
// Types can register a function to provide a prim name.
// Volumes do this to return a name stored in the f3d file. This is
// important for consistant cluster naming.
string n;
if( GusdPrimWrapper::getPrimName( gtPrim, n )) {
primName = n;
}
bool refinePackedPrims = m_refinePackedPrims;
bool primHasNameAttr = false;
if( primName.empty() ) {
GT_AttributeListHandle primAttrs;
if( primType == GT_GEO_PACKED ) {
primAttrs = UTverify_cast<const GT_GEOPrimPacked*>(gtPrim.get())->getInstanceAttributes();
}
if( !primAttrs ) {
primAttrs = gtPrim->getUniformAttributes();
}
if( !primAttrs ) {
primAttrs = gtPrim->getDetailAttributes();
}
GT_DataArrayHandle dah;
if( primAttrs ) {
dah = primAttrs->get( m_pathAttrName.c_str() );
}
if( dah && dah->isValid() ) {
const char *s = dah->getS(0);
if( s != NULL ) {
primName = s;
primHasNameAttr = true;
}
}
if( primAttrs ) {
GT_DataArrayHandle overXformsAttr = primAttrs->get( GUSD_OVERTRANSFORMS_ATTR );
if( overXformsAttr ) {
if( overXformsAttr->getI32(0) != 0 ) {
refinePackedPrims = false;
}
}
}
}
// The following is only necessary for point instancers. Prototypes
// can't be point instancers.
if (!m_buildPrototypes) {
// Check per prim if we are building a point instancer. This may cause
// problems for point instancers with discontiguous packed prims.
bool localBuildPointInstancer = false;
// If we have imported USD geometry get the type to see if it is a
// point instancer we need to overlay.
if(auto packedUSD = dynamic_cast<const GusdGT_PackedUSD*>( gtPrim.get() )) {
if(packedUSD->getFileName()) {
// Get the usd src prim path used for point instancers
const SdfPath& instancerPrimPath =
packedUSD->getSrcPrimPath();
GusdStageCacheReader cache;
if(UsdPrim prim = cache.GetPrimWithVariants(
packedUSD->getFileName(), instancerPrimPath).first) {
// Get the type name of the usd file to overlay
m_pointInstancerType = prim.GetTypeName();
// Make sure to set buildPointInstancer to true if we are overlaying a
// point instancer
if (m_pointInstancerType == _tokens->PointInstancer ||
m_pointInstancerType == _tokens->PxPointInstancer) {
localBuildPointInstancer = true;
}
}
}
}
// If we find either an instancepath or usdinstancepath attribute, build a
// point instancer.
GT_Owner owner;
if(gtPrim->findAttribute("instancepath", owner, 0) ||
gtPrim->findAttribute("usdinstancepath", owner, 0) ) {
localBuildPointInstancer = true;
}
if (m_buildPointInstancer || localBuildPointInstancer) {
// If we are building point instancer, stash prims that can be
// point instanced. Build the point instancer in the finish method.
// If given a prim path, pass it to the collector for a custom
// usd scope. Otherwise pass an empty SdfPath.
SdfPath instancerPrimPath;
if( !primName.empty() ) {
instancerPrimPath = SdfPath(createPrimPath(primName));
}
if( auto packedUSD = dynamic_cast<const GusdGT_PackedUSD*>( gtPrim.get() )) {
// Point instancer from packed usd
instancerPrimPath = instancerPrimPath.IsEmpty() ? packedUSD->getSrcPrimPath() : instancerPrimPath;
m_collector.addInstPrim( instancerPrimPath, gtPrim );
return;
}
else if( gtPrim->getPrimitiveType() == GT_PRIM_INSTANCE ) {
// Point instancer from packed primitives
// A GT_PrimInstance can container more than one instance. Create
// an entry for each.
auto instPrim = UTverify_cast<const GT_PrimInstance*>( gtPrim.get() );
// TODO: If we put all geometry packed prims here, then we break
// grouping prims for purpose
for( size_t i = 0; i < instPrim->entries(); ++i ) {
m_collector.addInstPrim( instancerPrimPath, gtPrim, i );
}
return;
}
if( primType == GT_PRIM_PARTICLE || primType == GT_PRIM_POINT_MESH ) {
// Point instancer from points with instancepath attribute
// Check for the usdprototypespath attribute in case it is not
// a point or primitivie attribute.
GT_AttributeListHandle uniformAttrs = gtPrim->getUniformAttributes();
uniformAttrs = findAndAddStringAttribute(uniformAttrs, "usdprototypespath", gtPrim);
// Find and add a custom prototype scope attribute.
uniformAttrs = findAndAddStringAttribute(uniformAttrs, "usdprototypesscope", gtPrim);
gtPrim = new GusdGT_PointInstancer(
gtPrim->getPointAttributes(),
uniformAttrs );
primType = gtPrim->getPrimitiveType();
}
}
}
// We must refine packed prims that don't have a name
if( !primHasNameAttr && !refinePackedPrims ) {
refinePackedPrims = true;
}
if( primName.empty() &&
gtPrim->getPrimitiveType() == GusdGT_PackedUSD::getStaticPrimitiveType() ) {
auto packedUsdPrim = UTverify_cast<const GusdGT_PackedUSD *>(gtPrim.get());
SdfPath path = packedUsdPrim->getPrimPath().StripAllVariantSelections();
if( m_useUSDIntrinsicNames ) {
primName = path.GetString();
}
else {
primName = path.GetName();
}
// We want prototypes to be children of the point instancer, so we make
// the usd path a relative scope of just the usd prim name
if ( m_buildPrototypes && !primName.empty() && primName[0] == '/' ) {
size_t idx = primName.find_last_of("/");
primName = primName.substr(idx+1);
}
}
// If the prim path was not explicitly set, try to come up with a reasonable
// default.
bool addNumericSuffix = false;
if( primName.empty() ) {
int t = gtPrim->getPrimitiveType();
if( t == GT_PRIM_POINT_MESH || t == GT_PRIM_PARTICLE )
primName = "points";
else if( t == GT_PRIM_POLYGON_MESH || t == GT_PRIM_SUBDIVISION_MESH )
primName = "mesh";
else if( t == GT_PRIM_CURVE_MESH )
primName = "curve";
else if( t == GusdGT_PointInstancer::getStaticPrimitiveType() )
primName = "instances";
else if(const char *n = GusdPrimWrapper::getUsdName( t ))
primName = n;
else
primName = "obj";
if( !primName.empty() ) {
addNumericSuffix = true;
}
}
string primPath = createPrimPath(primName);
TfToken purpose = UsdGeomTokens->default_;
{
GT_Owner own = GT_OWNER_PRIMITIVE;
GT_DataArrayHandle dah = gtPrim->findAttribute( GUSD_PURPOSE_ATTR, own, 0 );
if( dah && dah->isValid() ) {
purpose = TfToken(dah->getS(0));
}
}
if( primType == GT_PRIM_INSTANCE ) {
auto inst = UTverify_cast<const GT_PrimInstance*>(gtPrim.get());
const GT_PrimitiveHandle geometry = inst->geometry();
if ( geometry->getPrimitiveType() == GT_GEO_PACKED ) {
// If we find a packed prim that has a name, this become a group (xform) in
// USD. If it doesn't have a name, we just accumulate the transform and recurse.
auto packedGeo = UTverify_cast<const GT_GEOPrimPacked*>(geometry.get());
for( GT_Size i = 0; i < inst->transforms()->entries(); ++i ) {
UT_Matrix4D m;
inst->transforms()->get(i)->getMatrix(m);
UT_Matrix4D newCtm = m_localToWorldXform;
newCtm = m* m_localToWorldXform;
SdfPath newPath = m_pathPrefix;
bool recurse = true;
if( primHasNameAttr ||
( m_forceGroupTopPackedPrim && m_isTopLevel )) {
// m_forceGroupTopPackedPrim is used when we are writing instance
// prototypes. We need to add instance id attributes to the top
// level group. Here we make sure that we create that group, even
// if the user hasn't named it.
newPath = m_collector.add( SdfPath(primPath),
addNumericSuffix,
gtPrim,
newCtm,
purpose,
m_writeCtrlFlags );
// If we are just writing transforms and encounter a packed prim, we
// just want to write it's transform and not refine it further.
recurse = refinePackedPrims;
}
if( recurse ) {
GusdRefiner childRefiner(
m_collector,
newPath,
m_pathAttrName,
newCtm );
childRefiner.m_refinePackedPrims = refinePackedPrims;
childRefiner.m_forceGroupTopPackedPrim = m_forceGroupTopPackedPrim;
childRefiner.m_isTopLevel = false;
childRefiner.m_writeCtrlFlags = m_writeCtrlFlags;
childRefiner.m_writeCtrlFlags.update( geometry );
#if UT_MAJOR_VERSION_INT >= 16
childRefiner.refineDetail( packedGeo->getPackedDetail(), m_refineParms );
#else
childRefiner.refineDetail( packedGeo->getPrim()->getPackedDetail(), m_refineParms );
#endif
}
}
return;
}
}
if( (primType != GT_GEO_PACKED || !refinePackedPrims) &&
GusdPrimWrapper::isGTPrimSupported(gtPrim) ) {
UT_Matrix4D m;
if( primType == GT_GEO_PACKED ) {
// packed fragment
UTverify_cast<const GT_GEOPrimPacked*>(gtPrim.get())->getFullTransform()->getMatrix(m);
}
else {
gtPrim->getPrimitiveTransform()->getMatrix(m);
}
UT_Matrix4D newCtm = m_localToWorldXform;
newCtm = m* m_localToWorldXform;
m_collector.add( SdfPath(primPath),
addNumericSuffix,
gtPrim,
newCtm,
purpose,
m_writeCtrlFlags );
}
else {
gtPrim->refine( *this, &m_refineParms );
}
}
