fix(cnn_v3/tools): remove unused sampler binding from FULL_PACK_SHADER

WebGPU auto-reflects the BGL from the shader; a declared-but-unused sampler
binding is omitted from the layout, causing CreateBindGroup to reject it.
Removed binding 6 (sampler) entirely — all reads use textureLoad(). Renumbered
f0/f1 from 7/8 to 6/7 to match.

1 files changed, 4 insertions, 5 deletions

diff --git a/cnn_v3/tools/shaders.js b/cnn_v3/tools/shaders.js
index d5b1fb4..a1b2929 100644
--- a/cnn_v3/tools/shaders.js
+++ b/cnn_v3/tools/shaders.js
@@ -252,9 +252,9 @@ const VIZ_U32=`
 }`;
 
 // Full G-buffer pack: assembles feat_tex0/feat_tex1 from individual G-buffer images.
-// Bindings: albedo(0) normal(1) depth(2) matid(3) shadow(4) transp(5) sampler(6) f0(7) f1(8)
+// Bindings: albedo(0) normal(1) depth(2) matid(3) shadow(4) transp(5) f0(6) f1(7)
 // All source textures are rgba8unorm (browser-loaded images, R channel for depth/matid/shadow/transp).
-// Matches gbuf_pack.wgsl packing exactly so the CNN sees the same layout.
+// Uses textureLoad() only (no sampler needed). Matches gbuf_pack.wgsl packing exactly.
 const FULL_PACK_SHADER=`
 @group(0) @binding(0) var albedo: texture_2d<f32>;
 @group(0) @binding(1) var normal: texture_2d<f32>;
@@ -262,9 +262,8 @@ const FULL_PACK_SHADER=`
 @group(0) @binding(3) var matid:  texture_2d<f32>;
 @group(0) @binding(4) var shadow: texture_2d<f32>;
 @group(0) @binding(5) var transp: texture_2d<f32>;
-@group(0) @binding(6) var smp:    sampler;
-@group(0) @binding(7) var f0:     texture_storage_2d<rgba32uint,write>;
-@group(0) @binding(8) var f1:     texture_storage_2d<rgba32uint,write>;
+@group(0) @binding(6) var f0:     texture_storage_2d<rgba32uint,write>;
+@group(0) @binding(7) var f1:     texture_storage_2d<rgba32uint,write>;
 fn ld(c:vec2i,d:vec2i)->f32{return textureLoad(depth,clamp(c,vec2i(0),d-vec2i(1)),0).r;}
 fn b2(tl:vec2i,d:vec2i)->vec3f{
   var s=vec3f(0.);