void Example3_NurbsIn()
{
std::cout << "loading archive" << std::endl;
IArchive archive( Alembic::AbcCoreHDF5::ReadArchive(), "nurbs3.abc" );
std::cout << "making INuPatch object" << std::endl;
INuPatch myNurbs( IObject( archive, kTop) , "nurbs_surface_withW");
std::cout << "getting INuPatch schema" << std::endl;
INuPatchSchema &nurbsSchema = myNurbs.getSchema();
// get the samples from the curves
std::cout << "getting INuPatch sample" << std::endl;
INuPatchSchema::Sample nurbsSample;
nurbsSchema.get( nurbsSample );
// test the bounding box
std::cout << nurbsSample.getSelfBounds().min << std::endl;
std::cout << nurbsSample.getSelfBounds().max << std::endl;
TESTING_ASSERT( nurbsSample.getSelfBounds().min == V3d( 0.0, 0.0, -3.0 ) );
TESTING_ASSERT( nurbsSample.getSelfBounds().max == V3d( 3.0, 3.0, 3.0 ) );
std::cout << "Number of trim curves: " << nurbsSample.getTrimNumLoops() << std::endl;
TESTING_ASSERT( nurbsSample.getTrimNumLoops() == 0 );
TESTING_ASSERT( nurbsSample.hasTrimCurve() == false );
TESTING_ASSERT( nurbsSample.getPositionWeights()->size() ==
( size_t ) g_nP );
TESTING_ASSERT( nurbsSchema.isConstant() == true );
}
//-*****************************************************************************
void ProcessNuPatch( INuPatch &patch, ProcArgs &args )
{
INuPatchSchema &ps = patch.getSchema();
TimeSamplingPtr ts = ps.getTimeSampling();
SampleTimeSet sampleTimes;
GetRelevantSampleTimes( args, ts, ps.getNumSamples(), sampleTimes );
//trim curves are described outside the motion blocks
if ( ps.hasTrimCurve() )
{
//get the current time sample independent of any shutter values
INuPatchSchema::Sample sample = ps.getValue(
ISampleSelector( args.frame / args.fps ) );
RiTrimCurve( sample.getTrimNumCurves()->size(), //numloops
(RtInt*) sample.getTrimNumCurves()->get(),
(RtInt*) sample.getTrimOrders()->get(),
(RtFloat*) sample.getTrimKnots()->get(),
(RtFloat*) sample.getTrimMins()->get(),
(RtFloat*) sample.getTrimMaxes()->get(),
(RtInt*) sample.getTrimNumVertices()->get(),
(RtFloat*) sample.getTrimU()->get(),
(RtFloat*) sample.getTrimV()->get(),
(RtFloat*) sample.getTrimW()->get() );
}
bool multiSample = sampleTimes.size() > 1;
if ( multiSample ) { WriteMotionBegin( args, sampleTimes ); }
for ( SampleTimeSet::iterator iter = sampleTimes.begin();
iter != sampleTimes.end(); ++iter )
{
ISampleSelector sampleSelector( *iter );
INuPatchSchema::Sample sample = ps.getValue( sampleSelector );
ParamListBuilder paramListBuilder;
//build this here so that it's still in scope when RiNuPatchV is
//called.
std::vector<RtFloat> pwValues;
if ( sample.getPositionWeights() )
{
if ( sample.getPositionWeights()->size() == sample.getPositions()->size() )
{
//need to combine P with weight form Pw
pwValues.reserve( sample.getPositions()->size() * 4 );
const float32_t * pStart = reinterpret_cast<const float32_t * >(
sample.getPositions()->get() );
const float32_t * wStart = reinterpret_cast<const float32_t * >(
sample.getPositionWeights()->get() );
for ( size_t i = 0, e = sample.getPositionWeights()->size();
i < e; ++i )
{
pwValues.push_back( pStart[i*3] );
pwValues.push_back( pStart[i*3+1] );
pwValues.push_back( pStart[i*3+2] );
pwValues.push_back( wStart[i] );
}
paramListBuilder.add( "Pw", (RtPointer) &pwValues[0] );
}
}
if ( pwValues.empty() )
{
//no Pw so go straight with P
paramListBuilder.add( "P",
(RtPointer)sample.getPositions()->get() );
}
ICompoundProperty arbGeomParams = ps.getArbGeomParams();
AddArbitraryGeomParams( arbGeomParams,
sampleSelector, paramListBuilder );
//For now, use the last knot value for umin and umax as it's
//not described in the alembic data
RiNuPatchV(
sample.getNumU(),
sample.getUOrder(),
(RtFloat *) sample.getUKnot()->get(),
0.0, //umin
sample.getUKnot()->get()[sample.getUKnot()->size()-1],//umax
sample.getNumV(),
sample.getVOrder(),
(RtFloat *) sample.getVKnot()->get(),
0.0, //vmin
sample.getVKnot()->get()[sample.getVKnot()->size()-1], //vmax
paramListBuilder.n(),
paramListBuilder.nms(),
paramListBuilder.vals() );
}
if ( multiSample ) { RiMotionEnd(); }
}
