C++ MultiGrid::has_vertex_attachment方法代码示例

bool SaveGridHierarchyTransformed(MultiGrid& mg, ISubsetHandler& sh,
								  const char* filename, number offset)
{
	PROFILE_FUNC_GROUP("grid");
	APosition aPos;
//	uses auto-attach
	Grid::AttachmentAccessor<Vertex, APosition> aaPos(mg, aPos, true);

//	copy the existing position to aPos. We take care of dimension differences.
//	Note:	if the method was implemented for domains, this could be implemented
//			in a nicer way.
	if(mg.has_vertex_attachment(aPosition))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition, aPos);
	else if(mg.has_vertex_attachment(aPosition2))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition2, aPos);
	else if(mg.has_vertex_attachment(aPosition1))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition1, aPos);

//	iterate through all vertices and apply an offset depending on their level.
	for(size_t lvl = 0; lvl < mg.num_levels(); ++lvl){
		for(VertexIterator iter = mg.begin<Vertex>(lvl);
			iter != mg.end<Vertex>(lvl); ++iter)
		{
			aaPos[*iter].z() += (number)lvl * offset;
		}
	}

//	finally save the grid
	bool writeSuccess = SaveGridToFile(mg, sh, filename, aPos);

//	clean up
	mg.detach_from_vertices(aPos);

	return writeSuccess;
}

bool TestGridLayoutMap(MultiGrid& mg, GridLayoutMap& glm)
{
	if(mg.has_vertex_attachment(aPosition))
		return TestGridLayoutMap(mg, glm, aPosition);
	else if(mg.has_vertex_attachment(aPosition2))
		return TestGridLayoutMap(mg, glm, aPosition2);
	else if(mg.has_vertex_attachment(aPosition1))
		return TestGridLayoutMap(mg, glm, aPosition1);
	else
		UG_LOG("ERROR in TestGridLayoutMap: A standard position attachment"
				" is required.\n");
	return false;
}

bool SaveGridLevelToFile(MultiGrid& srcMG, ISubsetHandler& srcSH, int lvl, const char* filename)
{
//	check whether one of the standard attachments is attached and call
//	SaveGridLevel with that attachment
	if(srcMG.has_vertex_attachment(aPosition))
		return SaveGridLevel(srcMG, srcSH, lvl, filename, aPosition);
	if(srcMG.has_vertex_attachment(aPosition2))
		return SaveGridLevel(srcMG, srcSH, lvl, filename, aPosition2);
	if(srcMG.has_vertex_attachment(aPosition1))
		return SaveGridLevel(srcMG, srcSH, lvl, filename, aPosition1);

	return false;
}

bool SaveSurfaceViewTransformed(MultiGrid& mg, const SurfaceView& sv,
								const char* filename, number offset)
{
	PROFILE_FUNC_GROUP("grid");

	APosition aPos;
//	uses auto-attach
	Grid::AttachmentAccessor<Vertex, APosition> aaPos(mg, aPos, true);

//	copy the existing position to aPos. We take care of dimension differences.
//	Note:	if the method was implemented for domains, this could be implemented
//			in a nicer way.
	if(mg.has_vertex_attachment(aPosition))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition, aPos);
	else if(mg.has_vertex_attachment(aPosition2))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition2, aPos);
	else if(mg.has_vertex_attachment(aPosition1))
		ConvertMathVectorAttachmentValues<Vertex>(mg, aPosition1, aPos);

//	iterate through all vertices and apply an offset depending on their level.
	for(size_t lvl = 0; lvl < mg.num_levels(); ++lvl){
		for(VertexIterator iter = mg.begin<Vertex>(lvl);
			iter != mg.end<Vertex>(lvl); ++iter)
		{
			aaPos[*iter].z() += (number)lvl * offset;
		}
	}

//	create a subset handler which holds different subsets for the different interface types
	SubsetHandler sh(mg);

	AssignSubsetsBySurfaceViewState<Vertex>(sh, sv, mg);
	AssignSubsetsBySurfaceViewState<Edge>(sh, sv, mg);
	AssignSubsetsBySurfaceViewState<Face>(sh, sv, mg);
	AssignSubsetsBySurfaceViewState<Volume>(sh, sv, mg);

	AssignSubsetColors(sh);
	EraseEmptySubsets(sh);

//	finally save the grid
	bool writeSuccess = SaveGridToFile(mg, sh, filename, aPos);

//	clean up
	mg.detach_from_vertices(aPos);

	return writeSuccess;
}

bool CreateSmoothHierarchy(MultiGrid& mg, size_t numRefs)
{
	PROFILE_FUNC_GROUP("grid");
	IRefinementCallback* refCallback = NULL;
//	we're only checking for the main attachments here.
//todo: improve this - add a domain-based hierarchy creator.
	if(mg.has_vertex_attachment(aPosition1))
		refCallback = new SubdivisionLoopProjector<APosition1>(mg, aPosition1, aPosition1);
	else if(mg.has_vertex_attachment(aPosition2))
		refCallback = new SubdivisionLoopProjector<APosition2>(mg, aPosition2, aPosition2);
	else if(mg.has_vertex_attachment(aPosition))
		refCallback = new SubdivisionLoopProjector<APosition>(mg, aPosition, aPosition);
		
	if(!refCallback){
		UG_LOG("No standard position attachment found. Aborting.\n");
		return false;
	}
	
	GlobalMultiGridRefiner ref(mg, refCallback);

	for(size_t lvl = 0; lvl < numRefs; ++lvl){
		ref.refine();
	}

	if(mg.has_vertex_attachment(aPosition1))
		ProjectToLimitPLoop(mg, aPosition1, aPosition1);
	else if(mg.has_vertex_attachment(aPosition2))
		ProjectToLimitPLoop(mg, aPosition2, aPosition2);
	else if(mg.has_vertex_attachment(aPosition))
		ProjectToLimitPLoop(mg, aPosition, aPosition);

	delete refCallback;
	return true;
}