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Enforces the "No Silent Fallbacks" rule for workplanes when modeling.
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| name | DM Viewport Fallback Rule |
| description | Enforces the "No Silent Fallbacks" rule for workplanes when modeling. |
This project strictly enforces that tools behavior should never depend on hidden or implicitly cached state that the user cannot see.
When a user triggers a tool click, the tool casts a ray through the viewport. If the ray hits a face on existing geometry, it aligns the workplane to that face. If it hits an explicit visual DMWorkPlane, it snaps to it.
If the ray hits empty space, the fall-back behavior must be completely stateless:
When creating a new modeling tool (e.g. subclassing PrimitiveCreatorBase or NURBSPrimitiveCreator), you must:
_last_working_plane.ViewProjector.get_base_plane().get_mouse_plane_pt()'s fallback; do not attempt to cache it across tool invocations unless an explicit, user-facing persistent object (like a DMWorkPlane) dictates it.