Rename DepthPass to PickingPass

The map created by the shader is not strictly a depth map; not only is the "depth" encoded in the rgb channels, but it is also a distance to the camera instead of a "scene depth".

cura/PickingPass.py

@@ -15,9 +15,9 @@ from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
 #   The texture is used to map a 2d location (eg the mouse location) to a world space position
 #
 #   Note that in order to increase precision, the 24 bit depth value is encoded into all three of the R,G & B channels
-class DepthPass(RenderPass):
+class PickingPass(RenderPass):
     def __init__(self, width: int, height: int):
-        super().__init__("depth", width, height)
+        super().__init__("picking", width, height)
 
         self._renderer = Application.getInstance().getRenderer()
 

plugins/SupportEraser/SupportEraser.py

@@ -13,7 +13,7 @@ from cura.Scene.SliceableObjectDecorator import SliceableObjectDecorator
 from cura.Scene.BuildPlateDecorator import BuildPlateDecorator
 from UM.Scene.Iterator.BreadthFirstIterator import BreadthFirstIterator
 from cura.Settings.SettingOverrideDecorator import SettingOverrideDecorator
-from cura.DepthPass import DepthPass
+from cura.PickingPass import PickingPass
 
 import os
 import os.path
@@ -30,13 +30,13 @@ class SupportEraser(Tool):
         if event.type == Event.MousePressEvent and self._controller.getToolsEnabled():
             active_camera = self._controller.getScene().getActiveCamera()
 
-            # Create depth pass for picking
-            depth_pass = DepthPass(active_camera.getViewportWidth(), active_camera.getViewportHeight())
-            depth_pass.render()
+            # Create a pass for picking a world-space location from the mouse location
+            picking_pass = PickingPass(active_camera.getViewportWidth(), active_camera.getViewportHeight())
+            picking_pass.render()
 
-            picked_position = depth_pass.getPickedPosition(event.x, event.y)
+            picked_position = picking_pass.getPickedPosition(event.x, event.y)
 
-            # Add the anto_overhang_mesh cube:
+            # Add the anti_overhang_mesh cube at the picked location
             self._createEraserMesh(picked_position)
 
     def _createEraserMesh(self, position: Vector):