IECore::CameraPtr GafferScene::camera( const ScenePlug *scene, const ScenePlug::ScenePath &cameraPath, const IECore::CompoundObject *globals )
{
ConstCompoundObjectPtr computedGlobals;
if( !globals )
{
computedGlobals = scene->globalsPlug()->getValue();
globals = computedGlobals.get();
}
std::string cameraName;
ScenePlug::pathToString( cameraPath, cameraName );
if( !exists( scene, cameraPath ) )
{
throw IECore::Exception( "Camera \"" + cameraName + "\" does not exist" );
}
IECore::ConstCameraPtr constCamera = runTimeCast<const IECore::Camera>( scene->object( cameraPath ) );
if( !constCamera )
{
std::string path; ScenePlug::pathToString( cameraPath, path );
throw IECore::Exception( "Location \"" + cameraName + "\" is not a camera" );
}
IECore::CameraPtr camera = constCamera->copy();
camera->setName( cameraName );
const BoolData *cameraBlurData = globals->member<BoolData>( "option:render:cameraBlur" );
const bool cameraBlur = cameraBlurData ? cameraBlurData->readable() : false;
camera->setTransform( transform( scene, cameraPath, shutter( globals ), cameraBlur ) );
applyCameraGlobals( camera.get(), globals );
return camera;
}
void Render::outputCamera( const ScenePlug *scene, const IECore::CompoundObject *globals, IECore::Renderer *renderer ) const
{
// get the camera from the scene
const StringData *cameraPathData = globals->member<StringData>( "render:camera" );
IECore::CameraPtr camera = 0;
if( cameraPathData )
{
ScenePlug::ScenePath cameraPath;
ScenePlug::stringToPath( cameraPathData->readable(), cameraPath );
IECore::ConstCameraPtr constCamera = runTimeCast<const IECore::Camera>( scene->object( cameraPath ) );
if( constCamera )
{
camera = constCamera->copy();
const BoolData *cameraBlurData = globals->member<BoolData>( "render:cameraBlur" );
const bool cameraBlur = cameraBlurData ? cameraBlurData->readable() : false;
camera->setTransform( transform( scene, cameraPath, shutter( globals ), cameraBlur ) );
}
}
if( !camera )
{
camera = new IECore::Camera();
}
// apply the resolution
const V2iData *resolutionData = globals->member<V2iData>( "render:resolution" );
if( resolutionData )
{
camera->parameters()["resolution"] = resolutionData->copy();
}
camera->addStandardParameters();
// apply the shutter
camera->parameters()["shutter"] = new V2fData( shutter( globals ) );
// and output
camera->render( renderer );
}