ConstObjectPtr SceneShape::readSceneShapeObject( const MDagPath &p )
{
SceneShape *sceneShape = findScene( p, true );
if ( !sceneShape )
{
return 0;
}
MPlug pTime( sceneShape->thisMObject(), aTime );
MTime time;
pTime.getValue( time );
double t = time.as( MTime::kSeconds );
return sceneShape->getSceneInterface()->readObject( t );
}
void SceneShapeUI::getDrawRequests( const MDrawInfo &info, bool objectAndActiveOnly, MDrawRequestQueue &requests )
{
// it's easy if no one want to look at us
if( !info.objectDisplayStatus( M3dView::kDisplayMeshes ) )
{
return;
}
// the node we're meant to be drawing
SceneShape *sceneShape = (SceneShape *)surfaceShape();
if( !sceneShape->getSceneInterface() )
{
return;
}
// draw data encapsulating that node
MDrawData drawData;
getDrawData( sceneShape, drawData );
// a request for the bound if necessary
MPlug pDrawBound( sceneShape->thisMObject(), SceneShape::aDrawRootBound );
bool drawBound;
pDrawBound.getValue( drawBound );
if( drawBound )
{
bool doDrawBound = true;
// If objectOnly is true, check for an object. If none found, no need to add the bound request.
MPlug pObjectOnly( sceneShape->thisMObject(), SceneShape::aObjectOnly );
bool objectOnly;
pObjectOnly.getValue( objectOnly );
if( objectOnly && !sceneShape->getSceneInterface()->hasObject() )
{
doDrawBound = false;
}
if( doDrawBound )
{
MDrawRequest request = info.getPrototype( *this );
request.setDrawData( drawData );
request.setToken( BoundDrawMode );
request.setDisplayStyle( M3dView::kWireFrame );
setWireFrameColors( request, info.displayStatus() );
requests.add( request );
}
}
MPlug pDrawAllBounds( sceneShape->thisMObject(), SceneShape::aDrawChildBounds );
bool drawAllBounds = false;
pDrawAllBounds.getValue( drawAllBounds );
// requests for the scene if necessary
MPlug pGLPreview( sceneShape->thisMObject(), SceneShape::aDrawGeometry );
bool glPreview;
pGLPreview.getValue( glPreview );
if( glPreview || drawAllBounds )
{
if( info.displayStyle()==M3dView::kGouraudShaded || info.displayStyle()==M3dView::kFlatShaded )
{
// make a request for solid drawing with a material
MDrawRequest solidRequest = info.getPrototype( *this );
solidRequest.setDrawData( drawData );
MDagPath path = info.multiPath();
M3dView view = info.view();
MMaterial material = MPxSurfaceShapeUI::material( path );
if( !material.evaluateMaterial( view, path ) )
{
MString pathName = path.fullPathName();
IECore::msg( IECore::Msg::Warning, "SceneShapeUI::getDrawRequests", boost::format( "Failed to evaluate material for \"%s\"." ) % pathName.asChar() );
}
if( material.materialIsTextured() )
{
material.evaluateTexture( drawData );
}
solidRequest.setMaterial( material );
// set the transparency request. we don't have a decent way of finding out
// if shaders applied by the procedural are transparent, so we've got a transparency
// attribute on the procedural holder for users to use. maya materials may also say
// they're transparent. if either asks for transparency then we'll ask for it here
bool transparent = false;
material.getHasTransparency( transparent );
solidRequest.setIsTransparent( transparent );
solidRequest.setToken( SceneDrawMode );
requests.add( solidRequest );
if( info.displayStatus()==M3dView::kActive || info.displayStatus()==M3dView::kLead || info.displayStatus()==M3dView::kHilite )
{
MDrawRequest wireRequest = info.getPrototype( *this );
wireRequest.setDrawData( drawData );
wireRequest.setDisplayStyle( M3dView::kWireFrame );
wireRequest.setToken( SceneDrawMode );
setWireFrameColors( wireRequest, info.displayStatus() );
wireRequest.setComponent( MObject::kNullObj );
if ( !objectAndActiveOnly )
{
if ( sceneShape->hasActiveComponents() )
{
MObjectArray components = sceneShape->activeComponents();
MObject component = components[0];
wireRequest.setComponent( component );
}
}
requests.add( wireRequest );
}
}
else
{
MDrawRequest request = info.getPrototype( *this );
request.setDrawData( drawData );
setWireFrameColors( request, info.displayStatus() );
request.setToken( SceneDrawMode );
request.setComponent( MObject::kNullObj );
if ( !objectAndActiveOnly )
{
if ( sceneShape->hasActiveComponents() )
{
MObjectArray components = sceneShape->activeComponents();
MObject component = components[0];
request.setComponent( component );
}
}
requests.add( request );
}
}
}
bool SceneShapeUI::select( MSelectInfo &selectInfo, MSelectionList &selectionList, MPointArray &worldSpaceSelectPts ) const
{
MStatus s;
// early out if we're not selectable. we always allow components to be selected if we're highlighted,
// but we don't allow ourselves to be selected as a whole unless meshes are in the selection mask.
// it's not ideal that we act like a mesh, but it's at least consistent with the drawing mask we use.
if( selectInfo.displayStatus() != M3dView::kHilite )
{
MSelectionMask meshMask( MSelectionMask::kSelectMeshes );
// Apparently selectInfo.selectable() still returns true when meshes are not
// displayed by the M3dView, so we are also testing the objectDisplay status.
// This was last confirmed in Maya 2014, and is presumably a Maya bug.
if( !selectInfo.selectable( meshMask ) || !selectInfo.objectDisplayStatus( M3dView::kDisplayMeshes ) )
{
return false;
}
}
// early out if we have no scene to draw
SceneShape *sceneShape = static_cast<SceneShape *>( surfaceShape() );
if( !sceneShape->getSceneInterface() )
{
return false;
}
IECoreGL::ConstScenePtr scene = sceneShape->glScene();
if( !scene )
{
return false;
}
// we want to perform the selection using an IECoreGL::Selector, so we
// can avoid the performance penalty associated with using GL_SELECT mode.
// that means we don't really want to call view.beginSelect(), but we have to
// call it just to get the projection matrix for our own selection, because as far
// as I can tell, there is no other way of getting it reliably.
M3dView view = selectInfo.view();
view.beginSelect();
Imath::M44d projectionMatrix;
glGetDoublev( GL_PROJECTION_MATRIX, projectionMatrix.getValue() );
view.endSelect();
view.beginGL();
glMatrixMode( GL_PROJECTION );
glLoadMatrixd( projectionMatrix.getValue() );
IECoreGL::Selector::Mode selectionMode = IECoreGL::Selector::IDRender;
if( selectInfo.displayStatus() == M3dView::kHilite && !selectInfo.singleSelection() )
{
selectionMode = IECoreGL::Selector::OcclusionQuery;
}
std::vector<IECoreGL::HitRecord> hits;
{
IECoreGL::Selector selector( Imath::Box2f( Imath::V2f( 0 ), Imath::V2f( 1 ) ), selectionMode, hits );
IECoreGL::State::bindBaseState();
selector.baseState()->bind();
scene->render( selector.baseState() );
if( selectInfo.displayStatus() != M3dView::kHilite )
{
// We're not in component selection mode. We'd like to be able to select the scene shape
// using the bounding box so we draw it too but only if it is visible
MPlug pDrawBound( sceneShape->thisMObject(), SceneShape::aDrawRootBound );
bool drawBound;
pDrawBound.getValue( drawBound );
if( drawBound )
{
IECoreGL::BoxPrimitive::renderWireframe( IECore::convert<Imath::Box3f>( sceneShape->boundingBox() ) );
}
}
}
view.endGL();
if( hits.empty() )
{
return false;
}
// iterate over the hits, converting them into components and also finding
// the closest one.
MIntArray componentIndices;
float depthMin = std::numeric_limits<float>::max();
int depthMinIndex = -1;
for( unsigned int i=0, e = hits.size(); i < e; i++ )
{
if( hits[i].depthMin < depthMin )
{
depthMin = hits[i].depthMin;
depthMinIndex = componentIndices.length();
}
int index = sceneShape->selectionIndex( IECoreGL::NameStateComponent::nameFromGLName( hits[i].name ) );
componentIndices.append( index );
}
assert( depthMinIndex >= 0 );
// figure out the world space location of the closest hit
MDagPath camera;
view.getCamera( camera );
MPoint worldIntersectionPoint;
selectionRayToWorldSpacePoint( camera, selectInfo, depthMin, worldIntersectionPoint );
// turn the processed hits into appropriate changes to the current selection
if( selectInfo.displayStatus() == M3dView::kHilite )
{
// selecting components
MFnSingleIndexedComponent fnComponent;
MObject component = fnComponent.create( MFn::kMeshPolygonComponent, &s ); assert( s );
if( selectInfo.singleSelection() )
{
fnComponent.addElement( componentIndices[depthMinIndex] );
}
else
{
fnComponent.addElements( componentIndices );
}
MSelectionList items;
items.add( selectInfo.multiPath(), component );
MDagPath path = selectInfo.multiPath();
selectInfo.addSelection(
items, worldIntersectionPoint,
selectionList, worldSpaceSelectPts,
MSelectionMask::kSelectMeshFaces,
true
);
}
else
{
// Check if we should be able to select that object
MPlug pObjectOnly( sceneShape->thisMObject(), SceneShape::aObjectOnly );
bool objectOnly;
pObjectOnly.getValue( objectOnly );
if( objectOnly && !sceneShape->getSceneInterface()->hasObject() )
{
return true;
}
// selecting objects
MSelectionList item;
item.add( selectInfo.selectPath() );
selectInfo.addSelection(
item, worldIntersectionPoint,
selectionList, worldSpaceSelectPts,
MSelectionMask::kSelectMeshes,
false
);
}
return true;
}
