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Record the real PBR attribute layout (6 channels)

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base_color 0:3, metallic 3:4, roughness 4:5, alpha 5:6 - the pipeline's own
pbr_attr_layout. o_voxel's baker indexes this dict BY NAME and raises KeyError deep
inside to_glb on any missing slot rather than at the call, so a partial layout looks
like a baker bug. Needed by the texture stage; recorded now while it is in hand.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
m3ultra 2026-08-03 16:47:20 +10:00
parent 516e3e4457
commit 26ae88dea8
1 changed files with 10 additions and 0 deletions
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pixal3d_mlx/mesh.py
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@ -28,6 +28,16 @@ import numpy as np
# Upstream fixes both: the model always works in a unit cube centred on the origin. # Upstream fixes both: the model always works in a unit cube centred on the origin.
AABB = [[-0.5, -0.5, -0.5], [0.5, 0.5, 0.5]] AABB = [[-0.5, -0.5, -0.5], [0.5, 0.5, 0.5]]
# How the texture decoder's 6 channels map to PBR slots (pipeline's pbr_attr_layout).
# o_voxel indexes this dict by name and raises KeyError on any missing slot, so a
# partial layout fails deep inside the baker rather than at the call.
PBR_ATTR_LAYOUT = {
"base_color": slice(0, 3),
"metallic": slice(3, 4),
"roughness": slice(4, 5),
"alpha": slice(5, 6),
}
def _torch(a): def _torch(a):
import torch import torch