From 94ae337e96ebe69ae6821d590a06f16ddbcdc6e5 Mon Sep 17 00:00:00 2001
From: Dejvino <dejvino@gmail.com>
Date: Tue, 30 Dec 2025 21:52:17 +0000
Subject: [PATCH] Feature: waving projection screen

---
 party-stage/src/scene/projection-screen.js | 27 +++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/party-stage/src/scene/projection-screen.js b/party-stage/src/scene/projection-screen.js
index 099a9f1..c4603cf 100644
--- a/party-stage/src/scene/projection-screen.js
+++ b/party-stage/src/scene/projection-screen.js
@@ -95,6 +95,7 @@ export class ProjectionScreen extends SceneFeature {
         super();
         projectionScreenInstance = this;
         this.isVisualizerActive = false;
+        this.originalPositions = null;
         sceneFeatureManager.register(this);
     }
 
@@ -125,9 +126,11 @@ export class ProjectionScreen extends SceneFeature {
         // 16:9 Aspect Ratio, large size
         const width = 10;
         const height = width * (9 / 16); 
-        const geometry = new THREE.PlaneGeometry(width, height);
+        const geometry = new THREE.PlaneGeometry(width, height, 32, 32);
         
         // Initial black material
+        this.originalPositions = geometry.attributes.position.clone();
+        
         const material = new THREE.MeshBasicMaterial({ color: 0x000000 });
         
         this.mesh = new THREE.Mesh(geometry, material);
@@ -151,6 +154,28 @@ export class ProjectionScreen extends SceneFeature {
     update(deltaTime) {
         updateScreenEffect();
 
+        // Wobble Logic
+        if (this.mesh && this.originalPositions) {
+            const time = state.clock.getElapsedTime();
+            const waveSpeed = 0.5;
+            const waveFrequency = 1.2;
+            const waveAmplitude = 0.3;
+            // same as stage-curtain ^^^
+            
+            const positions = this.mesh.geometry.attributes.position;
+            
+            for (let i = 0; i < positions.count; i++) {
+                const originalX = this.originalPositions.getX(i);
+                const originalZ = this.originalPositions.getZ(i);
+                
+                const zOffset = Math.sin(originalX * waveFrequency + time * waveSpeed) * waveAmplitude;
+                
+                positions.setZ(i, originalZ + zOffset);
+            }
+            positions.needsUpdate = true;
+            this.mesh.geometry.computeVertexNormals();
+        }
+
         if (this.isVisualizerActive && state.tvScreen.material.uniforms) {
             state.tvScreen.material.uniforms.u_time.value = state.clock.getElapsedTime();
             const beat = (state.music && state.music.beatIntensity) ? state.music.beatIntensity : 0.0;