feat: Implement Sequence and Effect system for demo choreography

Refactors the rendering pipeline into a modular Sequence/Effect system. 'MainSequence' manages the final frame rendering and a list of 'Sequence' layers. 'Sequence' manages a timeline of 'Effect' objects (start/end/priority). Concrete effects (Heptagon, Particles) are moved to 'demo_effects.cc'. Updates main loop to pass beat and aspect ratio.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/main.cc b/src/main.cc
index 4f99230..fb0b412 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -212,7 +212,8 @@ int main(int argc, char **argv) {
     float raw_peak = synth_get_output_peak();
     float visual_peak = fminf(raw_peak * 8.0f, 1.0f);
 
-    gpu_draw(visual_peak, aspect_ratio, (float)current_time);
+    float beat = fmodf((float)current_time * DEMO_BPM / 60.0f, 1.0f);
+    gpu_draw(visual_peak, aspect_ratio, (float)current_time, beat);
     audio_update();
   }