How to build index data for clipmaps with degenerate triangles.

CClipmapsSceneObject.IndexData.cpp

				// Standard LL
				IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 1));
				IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 1));
				IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 0));

				// Standard UR
				IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 1));
				IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 0));
				IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 0));

				// Bridge Up
				if (TopEdge && IsEven(x))
				{
					IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 0));
					IndexData.push_back(x + 2 + (GeometrySize + 1) * (y + 0));
					IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 0));
				}

				// Bridge Down
				if (BottomEdge && IsEven(x))
				{
					IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 1));
					IndexData.push_back(x + 2 + (GeometrySize + 1) * (y + 1));
					IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 1));
				}

				// Bridge Left
				if (LeftEdge && IsEven(y))
				{
					IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 2));
					IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 1));
					IndexData.push_back(x + 0 + (GeometrySize + 1) * (y + 0));
				}

				// Bridge Right
				if (RightEdge && IsEven(y))
				{
					IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 2));
					IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 0));
					IndexData.push_back(x + 1 + (GeometrySize + 1) * (y + 1));
				}