1 files changed, 17 insertions, 0 deletions
diff --git a/cnn_v3/src/gbuffer_effect.h b/cnn_v3/src/gbuffer_effect.h
index 13d394d..76d4347 100644
--- a/cnn_v3/src/gbuffer_effect.h
+++ b/cnn_v3/src/gbuffer_effect.h
@@ -46,6 +46,13 @@ class GBufferEffect : public Effect {
   void render(WGPUCommandEncoder encoder, const UniformsSequenceParams& params,
               NodeRegistry& nodes) override;
 
+  // Copies cnn_output_node_ → node_prev_tex_ after all effects have rendered.
+  void post_render(WGPUCommandEncoder encoder, NodeRegistry& nodes) override;
+
+  // Auto-wires cnn_output_node_: finds the first downstream effect whose
+  // input_nodes intersect our output_nodes, and uses its output_nodes[0].
+  void wire_dag(const std::vector<EffectDAGNode>& dag) override;
+
   // Populate the internal scene with ~20 rotating cubes and a few pumping
   // spheres.  Must be called once before the first render().
   void set_scene();
@@ -68,6 +75,16 @@ class GBufferEffect : public Effect {
   std::string node_depth_;
   std::string node_shadow_;
   std::string node_transp_;
+  std::string node_prev_tex_;    // persistent prev-frame CNN output (rgba8unorm)
+
+  // Name of the CNN effect's output node; set by caller before first render.
+  // When non-empty, the CNN output is copied into node_prev_tex_ each frame.
+  std::string cnn_output_node_;
+
+ public:
+  void set_cnn_output_node(const std::string& name) { cnn_output_node_ = name; }
+
+ private:
 
   // Owned scene and camera — populated by set_scene()
   Scene  scene_;