Blacksite/docs/editor/evaluations/physics-placement

Physics Placement Evaluation

Evidence record — not current product guidance. Use the documentation index for current behavior and architecture.

Date: 2026-07-12

The native Wayland editor is shown with the 2026-07-12 revision of assets/levels/physics_placement_showcase.scn.ron. At that revision, Placement Prop A, B, and C were multi-selected and released from three different heights through the hand/down-arrow action in the existing horizontal viewport toolbar. The fixture now exposes those stable actor IDs as Placement Cuboid, Placement Sphere, and Placement Capsule; its distinct-shape rerun is tracked by the sample-pack evaluation.

Acceptance

• In the recorded revision, all three props used hydrated Avian cuboid colliders and settled on Placement Floor after 1.5 simulated seconds.
• During preview the HUD reported selection count, simulated time, and Settled state; transform gizmos and viewport picking did not compete with the modal tool.
• Escape restored every starting transform and left history empty.
• A second run committed with Enter as exactly one Undo: Move Selection entry.
• Ctrl+Z restored all three elevated starting transforms; Ctrl+Y restored the settled transforms.
• Opening the fixture immediately after the terrain showcase no longer panicked on a stale generated terrain-material binding; the scene-switch regression is covered in blacksite_surface.
• The runtime log contained no physics-placement, scene-load, render-pipeline, or GPU validation error after the stale-binding fix.

Packaged-runtime tests remain intentionally deferred by project-owner request.