Axel Meyer a244f1585d feat: multi-level parent-chain transform with depth-first pipeline ...

Rewrites M.update to traverse the rig depth-first, computing each
bone's world-transform from its parent's already-cascaded world-pose
plus its own rest-offset and animated angle. Replaces the previous
single-level direct-from-origin transform.

Per-frame per-bone steps inside the traversal:
1. Sample keyframe from any playing anim on the bone's track
2. Apply look-at (uses parent's world from cascade)
3. Run procedural callbacks (once per puppet at root visit)
4. Compute and cache world-transform from parent.world + own rest + own angle

bone_state[bid].world = {x, y, angle} is the cache; render reads it.

New public API:
- puppet.bone_world_transform(handle, bone_id) -> (wx, wy, wa)
- puppet.write_bone_test_only(handle, bone_id, angle_rad) for test setup

Look-target previously interpreted as world-coords with bone-world-pos
= puppet origin + bone.rest. New implementation computes bone-world-pos
from cascaded parent transform, then subtracts the parent's accumulated
world-angle to store the LOCAL angle (so subsequent cascade in step 3.d
produces the correct final world-angle for the look-at bone).

spawn now initializes bone_state[bid].world = {x, y, angle} cache.

2026-05-18 03:03:21 +02:00

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