Add a working X-Ray view

plugins/XRayView/XRayPass.py

@@ -0,0 +1,41 @@
+# Copyright (c) 2015 Ultimaker B.V.
+# Cura is released under the terms of the AGPLv3 or higher.
+
+import os.path
+
+from UM.Application import Application
+from UM.PluginRegistry import PluginRegistry
+
+from UM.View.RenderPass import RenderPass
+from UM.View.RenderBatch import RenderBatch
+from UM.View.GL.OpenGL import OpenGL
+
+from UM.Scene.SceneNode import SceneNode
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+
+class XRayPass(RenderPass):
+    def __init__(self, width, height):
+        super().__init__("xray", width, height)
+
+        self._shader = None
+        self._gl = OpenGL.getInstance().getBindingsObject()
+        self._scene = Application.getInstance().getController().getScene()
+
+    def render(self):
+        if not self._shader:
+            self._shader = OpenGL.getInstance().createShaderProgram(os.path.join(PluginRegistry.getInstance().getPluginPath("XRayView"), "xray.shader"))
+
+        batch = RenderBatch(self._shader, type = RenderBatch.RenderType.NoType, backface_cull = False)
+        for node in DepthFirstIterator(self._scene.getRoot()):
+            if type(node) is SceneNode and node.getMeshData() and node.isVisible():
+                batch.addItem(node.getWorldTransformation(), node.getMeshData())
+
+        self.bind()
+
+        self._gl.glDisable(self._gl.GL_DEPTH_TEST)
+        self._gl.glEnable(self._gl.GL_BLEND)
+        self._gl.glBlendFunc(self._gl.GL_SRC_ALPHA, self._gl.GL_ONE)
+        batch.render(self._scene.getActiveCamera())
+        self._gl.glEnable(self._gl.GL_DEPTH_TEST)
+
+        self.release()