CURA-12660
When a message box is displayed, some offscreen rendering passes (face selection) render an unpredictable result and we are unable to start painting.
This went through a refactoring of the rendering passes. Since doing the offscreen rendering outside the Qt rendering loop caused some troubles, we now use the rendering passes only inside the Qt rendering loop, so that they work properly. Tools also have the ability to indicate which extra passes they require, so that we don't run all the passes when they are not required.
Since this issue also concerns the support blockers placement and rotation by face selection, they have been updated so that they now also always work.
The face selection mechanism using the Selection class was partially working and used only by the rotation, so now it has been deprecated in favor of the new mechanism.
This is a bit more logical than 'G', I'd say. E is now available since other shortcuts were remapped as well.
Contributes to issue CURA-5634 and fixes#3969.
MeshBuilder.addCube creates cubes that don't have per-vertex normals. Geometry like that does not render properly in most shaders used in Cura. This becomes obvious when a user changes the "Mesh Type" using Per Model Settings.
if the selection is cleared with this tool active, there is no way to switch to another tool than to re-select an object (by clicking it) because the tool buttons in the toolbar will have been disabled. The mouse-event happens after the selection is changed, so we need to keep track of what the selection was previously by monitoring the selection state.
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".
This is the first draft of the Support Eraser tool. The plugin creates a cube mesh which has the `anti_overhang_mesh` decorator causing it to block the creation of support material for overhangs within its volume. This distinction is necessary to avoid confusing this behavior from actually erasing a _portion_ of a support structure.
Some (non-necessary) improvements could be made such as:
- Better graphical style
- Discussion of whether the cube should be able to pass through the build plate or not
- Possible improvements to the tool's icon
- Placing the cube at a cursor click location
