From 8b30cadfc19647487986d14dba9ddba7908dd1d0 Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Thu, 12 Feb 2026 15:10:17 +0100
Subject: test_demo: Add beat-synchronized CNN post-processing with version
 selection

- Add --cnn-version <1|2> flag to select between CNN v1 and v2
- Implement beat_phase modulation for dynamic blend in both CNN effects
- Fix CNN v2 per-layer uniform buffer sharing (each layer needs own buffer)
- Fix CNN v2 y-axis orientation to match render pass convention
- Add Scene1Effect as base visual layer to test_demo timeline
- Reorganize CNN v2 shaders into cnn_v2/ subdirectory
- Update asset paths and documentation for new shader organization

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
---
 workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl | 47 +++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl

(limited to 'workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl')

diff --git a/workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl b/workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl
new file mode 100644
index 0000000..dd07f19
--- /dev/null
+++ b/workspaces/main/shaders/cnn_v2/cnn_v2_static.wgsl
@@ -0,0 +1,47 @@
+// CNN v2 Static Features Compute Shader
+// Generates 7D features + bias: [R, G, B, D, uv.x, uv.y, sin10_x, 1.0]
+
+@group(0) @binding(0) var input_tex: texture_2d<f32>;
+@group(0) @binding(1) var input_tex_mip1: texture_2d<f32>;
+@group(0) @binding(2) var input_tex_mip2: texture_2d<f32>;
+@group(0) @binding(3) var depth_tex: texture_2d<f32>;
+@group(0) @binding(4) var output_tex: texture_storage_2d<rgba32uint, write>;
+
+@compute @workgroup_size(8, 8)
+fn main(@builtin(global_invocation_id) id: vec3<u32>) {
+  let coord = vec2<i32>(id.xy);
+  let dims = textureDimensions(input_tex);
+
+  if (coord.x >= i32(dims.x) || coord.y >= i32(dims.y)) {
+    return;
+  }
+
+  // Sample RGBA from mip 0
+  let rgba = textureLoad(input_tex, coord, 0);
+  let r = rgba.r;
+  let g = rgba.g;
+  let b = rgba.b;
+
+  // Sample depth
+  let d = textureLoad(depth_tex, coord, 0).r;
+
+  // UV coordinates (normalized [0,1], bottom-left origin)
+  let uv_x = f32(coord.x) / f32(dims.x);
+  let uv_y = 1.0 - (f32(coord.y) / f32(dims.y));
+
+  // Multi-frequency position encoding
+  let sin10_x = sin(10.0 * uv_x);
+
+  // Bias dimension (always 1.0)
+  let bias = 1.0;
+
+  // Pack 8×f16 into 4×u32 (rgba32uint)
+  let packed = vec4<u32>(
+    pack2x16float(vec2<f32>(r, g)),
+    pack2x16float(vec2<f32>(b, d)),
+    pack2x16float(vec2<f32>(uv_x, uv_y)),
+    pack2x16float(vec2<f32>(sin10_x, bias))
+  );
+
+  textureStore(output_tex, coord, packed);
+}
-- 
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