xfy e2e2469971 feat(render): volumetric disk integration in the RK45 loop ...

Restructures the disk block in the main loop:
- Off tier: flat disk_color_flat single midplane sample (old behavior).
- Volumetric tiers: (A) in-slab per-step sampling accumulates emission ×
  arc length, reusing the RK45 adaptive step density; (B) midplane edge-
  capture weights one at-plane sample by slab depth along the ray.
Removes the Task-5 disk_color shim. physics.rs untouched; cargo test green.

2026-07-15 13:40:35 +08:00

..

shaders

feat(render): volumetric disk integration in the RK45 loop

2026-07-15 13:40:35 +08:00