Imath::Box3d HoudiniScene::readBound( double time ) const
{
OP_Node *node = retrieveNode( true );
Imath::Box3d bounds;
UT_BoundingBox box;
OP_Context context( time );
/// \todo: this doesn't account for SOPs containing multiple shapes
/// if we fix it, we need to fix the condition below as well
if ( node->getBoundingBox( box, context ) )
{
bounds = IECore::convert<Imath::Box3d>( box );
}
// paths embedded within a sop already have bounds accounted for
if ( m_contentIndex )
{
return bounds;
}
NameList children;
childNames( children );
for ( NameList::iterator it=children.begin(); it != children.end(); ++it )
{
ConstSceneInterfacePtr childScene = child( *it );
Imath::Box3d childBound = childScene->readBound( time );
if ( !childBound.isEmpty() )
{
bounds.extendBy( Imath::transform( childBound, childScene->readTransformAsMatrix( time ) ) );
}
}
return bounds;
}
Imath::Box3f SceneReader::computeBound( const ScenePath &path, const Gaffer::Context *context, const ScenePlug *parent ) const
{
ConstSceneInterfacePtr s = scene( path );
if( !s )
{
return Box3f();
}
Box3d b = s->readBound( context->getFrame() / g_frameRate );
if( b.isEmpty() )
{
return Box3f();
}
return Box3f( b.min, b.max );
}
Imath::Box3f SceneReader::computeBound( const ScenePath &path, const Gaffer::Context *context, const ScenePlug *parent ) const
{
std::string fileName = fileNamePlug()->getValue();
if( !fileName.size() )
{
return Box3f();
}
ConstSceneInterfacePtr s = SharedSceneInterfaces::get( fileName );
s = s->scene( path );
Box3d b = s->readBound( context->getFrame() / g_frameRate );
if( b.isEmpty() )
{
return Box3f();
}
return Box3f( b.min, b.max );
}
Imath::Box3f SceneReader::computeBound( const ScenePath &path, const Gaffer::Context *context, const ScenePlug *parent ) const
{
ConstSceneInterfacePtr s = scene( path );
if( !s )
{
return Box3f();
}
if( s->hasBound() )
{
const Box3d b = s->readBound( context->getTime() );
if( b.isEmpty() )
{
return Box3f();
}
return Box3f( b.min, b.max );
}
else
{
return unionOfTransformedChildBounds( path, parent );
}
}
void LinkedScene::writeAttribute( const Name &name, const Object *attribute, double time )
{
if ( m_readOnly )
{
throw Exception( "No write access to scene file!" );
}
if ( name == linkAttribute )
{
bool firstTime = !m_mainScene->hasAttribute( fileNameLinkAttribute );
if ( firstTime )
{
// if it's the first time, we better check if this level already has objects, tags or children
// and raise exceptions to prevent weird configurations...
if ( m_mainScene->hasObject() )
{
throw Exception( "Links to external scenes cannot be created on locations where there's already an object saved!" );
}
NameList names;
m_mainScene->childNames( names );
if ( names.size() )
{
throw Exception( "Links to external scenes cannot be created on locations where there are already child locations!" );
}
}
// we are creating a link!
const CompoundData *d = runTimeCast< const CompoundData >(attribute);
if ( !d )
{
throw Exception( "SceneInterface:link attribute must be of type CompoundData!" );
}
// open the linked scene
int linkDepth;
ConstDoubleDataPtr timeData = d->member< const DoubleData >( g_time );
const StringData *fileName = d->member< const StringData >( g_fileName );
const InternedStringVectorData *sceneRoot = d->member< const InternedStringVectorData >( g_root );
ConstSceneInterfacePtr linkedScene = expandLink( fileName, sceneRoot, linkDepth );
if ( !linkedScene )
{
throw Exception( "Trying to store a broken link!" );
}
// get the bounds of the linked scene
const SampledSceneInterface *sampledScene = runTimeCast< const SampledSceneInterface >(linkedScene.get());
if ( sampledScene && !timeData )
{
// When there's no time remapping we get all the bounding box samples from the linked scene, using the same time.
if ( firstTime )
{
size_t bounds = sampledScene->numBoundSamples();
for ( size_t b = 0; b < bounds; b++ )
{
m_mainScene->writeBound( sampledScene->readBoundAtSample(b), sampledScene->boundSampleTime(b) );
}
}
}
else
{
/// we store just the current bounding box
if ( timeData )
{
m_mainScene->writeBound( linkedScene->readBound(timeData->readable()), time );
}
else
{
m_mainScene->writeBound( linkedScene->readBound(time), time );
}
}
if ( firstTime )
{
// save the tags from the linked file to the current location so it gets propagated to the root.
NameList tags;
// Check if the position of the file we are trying to link to, has ancestor tags.
// This situation is undesirable, as it will make LinkedScene return inconsistent ancestor tags before and after the link location.
linkedScene->readTags(tags, SceneInterface::AncestorTag );
if ( tags.size() )
{
std::string pathStr;
SceneInterface::pathToString( sceneRoot->readable(), pathStr );
msg( Msg::Warning, "LinkedScene::writeAttribute", ( boost::format( "Detected ancestor tags while creating link to file %s at location %s." ) % fileName->readable() % pathStr ).str() );
}
tags.clear();
/// copy all descendent and local tags as descendent tags (so we can distinguish from tags added in the LinkedScene)
linkedScene->readTags(tags, SceneInterface::LocalTag|SceneInterface::DescendantTag );
static_cast< SceneCache *>(m_mainScene.get())->writeTags(tags, true);
m_mainScene->writeAttribute( fileNameLinkAttribute, d->member< const StringData >( g_fileName ), time );
m_mainScene->writeAttribute( rootLinkAttribute, d->member< const InternedStringVectorData >( g_root ), time );
}
/// we keep the information this level has a link, so we can prevent attempts to
/// create children or save objects at this level.
m_atLink = true;
if( timeData )
{
m_mainScene->writeAttribute( timeLinkAttribute, timeData, time );
}
return;
}
m_mainScene->writeAttribute(name,attribute,time);
}