Add Enable state for scene nodes

src/mcedit2/rendering/scenegraph/misc.py

@@ -37,6 +37,20 @@ class LineWidth(states.SceneNodeState):
         self.lineWidth = lineWidth
 
 
+class Enable(states.SceneNodeState):
+    def enter(self):
+        GL.glPushAttrib(GL.GL_ENABLE_BIT)
+        for e in self.enables:
+            GL.glEnable(e)
+
+    def exit(self):
+        GL.glPopAttrib()
+
+    def __init__(self, *enables):
+        super(Enable, self).__init__()
+        self.enables = enables
+
+
 class ClearRenderNode(rendernode.RenderNode):
     def drawSelf(self):
         color = self.sceneNode.clearColor

src/mcedit2/rendering/scenegraph/vertex_array.py

@@ -101,4 +101,4 @@ class VertexNode(Node):
         super(VertexNode, self).__init__()
         if not isinstance(vertexArrays, (list, tuple)):
             vertexArrays = [vertexArrays]
-        self.vertexArrays = vertexArrays
+        self.vertexArrays = vertexArrays

src/mcedit2/rendering/vertexarraybuffer.py

@@ -107,6 +107,7 @@ class VertexArrayBuffer(object):
     def __len__(self):
         return len(self.buffer)
 
+
 class QuadVertexArrayBuffer(VertexArrayBuffer):
 
     def __init__(self, count, textures=True, lights=True):