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VDBObject : Don't bake in automatic metadata when querying metadata #1423

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VDBObject : Don't bake in automatic metadata when querying metadata #1423

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dd57c91
VDBObject : Don't bake in automatic metadata when querying metadata
danieldresser-ie Jun 27, 2024
7f0610c
FIX : worldBound
danieldresser-ie Jun 28, 2024
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4 changes: 4 additions & 0 deletions Changes
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Original file line number Diff line number Diff line change
@@ -1,6 +1,10 @@
10.5.x.x (relative to 10.5.9.0)
========

Fixes
-----

VDBObject : metadata() now just returns existing metadata, without modifying it.


10.5.9.x (relative to 10.5.8.0)
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2 changes: 1 addition & 1 deletion include/IECoreVDB/VDBObject.h
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Expand Up @@ -88,7 +88,7 @@ class IECOREVDB_API VDBObject : public IECoreScene::VisibleRenderable
Imath::Box3f bound() const override;
void render( IECoreScene::Renderer *renderer ) const override;

IECore::CompoundObjectPtr metadata( const std::string &name );
IECore::CompoundObjectPtr metadata( const std::string &name ) const;

//! Are the grids in this VDBObject unmodified from the vdb file in filename?
//! Useful for passing VDB objects to renders by filename instead of memory buffer
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27 changes: 17 additions & 10 deletions src/IECoreVDB/VDBObject.cpp
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Expand Up @@ -57,11 +57,23 @@ namespace
template<typename T>
Imath::Box<Imath::Vec3<T> > worldBound( const openvdb::GridBase *grid, float padding = 0.50f )
{
openvdb::Vec3i min = grid->metaValue<openvdb::Vec3i>( grid->META_FILE_BBOX_MIN );
openvdb::Vec3i max = grid->metaValue<openvdb::Vec3i>( grid->META_FILE_BBOX_MAX );
openvdb::CoordBBox vdbBbox;
try
{
vdbBbox.min() = openvdb::Coord( grid->metaValue<openvdb::Vec3i>( grid->META_FILE_BBOX_MIN ) );
vdbBbox.max() = openvdb::Coord( grid->metaValue<openvdb::Vec3i>( grid->META_FILE_BBOX_MAX ) );
}
catch( ... )
{
// If we don't have metadata available, then hopefully it's because the vdb was freshly created and
// hasn't been saved to file yet, which should mean it's fully loaded, and we can call
// evalActiveVoxelBoundingBox.
// \todo : Can we guarantee that every VDB either is loaded, or has metadata?
vdbBbox = grid->evalActiveVoxelBoundingBox();
}

openvdb::Vec3d offset = openvdb::Vec3d( padding );
openvdb::BBoxd indexBounds = openvdb::BBoxd( min - offset, max + offset );
openvdb::BBoxd indexBounds = openvdb::BBoxd( vdbBbox.min() - offset, vdbBbox.max() + offset );
openvdb::BBoxd worldBounds = grid->transform().indexToWorld( indexBounds );
openvdb::Vec3d minBB = worldBounds.min();
openvdb::Vec3d maxBB = worldBounds.max();
Expand Down Expand Up @@ -199,7 +211,7 @@ void VDBObject::render( IECoreScene::Renderer *renderer ) const
{
}

IECore::CompoundObjectPtr VDBObject::metadata( const std::string &name )
IECore::CompoundObjectPtr VDBObject::metadata( const std::string &name ) const
{
CompoundObjectPtr metadata = new CompoundObject();

Expand All @@ -216,12 +228,7 @@ IECore::CompoundObjectPtr VDBObject::metadata( const std::string &name )
}
else
{
openvdb::GridBase::Ptr tmpGrid = findGrid ( name );
if ( tmpGrid )
{
tmpGrid->addStatsMetadata();
}
grid = tmpGrid;
grid = findGrid ( name );
}

if( !grid )
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