little performance optimization

Author: Absulit

src/main.js

@@ -14,6 +14,7 @@ const gui = new dat.GUI({ name: 'Points GUI' });
 const folderOptions = gui.addFolder('options');
 const folderControls = gui.addFolder('controls');
 const folderSongs = gui.addFolder('songs');
+const MAXCHARS = 30;
 
 let audio = null;
 let loop = false;
@@ -54,6 +55,7 @@ function playSong(song) {
 
     audio && audio.pause() && (audio = null);
     audio = points.setAudio('audio', audioUrl, options.volume, false, false);
+    points.setUniform('numChars', title.length < MAXCHARS ? title.length : MAXCHARS);
     points.setStorageMap('chars', strToCodes(title));
     let artworkLoaded = 0;
     song?.artworkColors && points.setStorageMap('artworkColors', song?.artworkColors.flat());
@@ -158,6 +160,7 @@ async function onCompleteTags(result) {
     }
 
     folderSongs.add(song, 'fn').name(song.name);
+    points.setUniform('numChars', title.length < MAXCHARS ? title.length : MAXCHARS);
     points.setStorageMap('chars', strToCodes(title));
 }
 
@@ -321,13 +324,14 @@ points.setSampler('textImageSampler', {
 });
 points.setTexture2d('feedbackTexture', true);
 
-audio = points.setAudio('audio', '', options.volume, loop, false);
+audio = points.setAudio('audio', '', options.volume, loop, false); // TODO returl null if empty or null is passed
 
 points.setUniform('showMessage', 1);
 points.setUniform('rand', 0);
 points.setUniform('progress', 0);
 points.setUniform('artworkLoaded', 0);
 // points.setUniform('somecolor', colors.color2, 'vec3f');
+points.setUniform('numChars', 12);
 points.setStorageMap('chars', strToCodes('Gravity Pull'), 'array<f32>')// TODO: setStorageMap doesn't work with u32 wrong sized
 points.setStorageMap('message', strToCodes('Select a song to Play'), 'array<f32>')// TODO: setStorageMap doesn't work with u32 wrong sized
 points.setStorageMap('artworkColors', Array(16).fill(1), 'array<vec4f>');

src/renderpasses/renderpass0/frag.js

@@ -129,7 +129,6 @@ const MATRIX4 = vec4f(.572,.717,.549, 1);
 
 const TAU = PI * 2; // TODO: fix on main library
 const TAUQUARTER = TAU * .25;
-const NUMCHARS = 30;
 const MAXBYTES = 256;
 const CHLEN = 0.125;
 const DINTENSITY = .0041;//0.0151;
@@ -240,7 +239,8 @@ fn main(
     let textScale = 2.476 * ratio.y + c0;
     let textUVR = uvr / textScale;
     let spaceRatio = .0017 * ratio.x;
-    for (var index = 0; index < NUMCHARS; index++) {
+
+    for (var index = 0; index < i32(params.numChars); index++) {
         let indexF32 = f32(index);
         let charIndex = u32(chars[index]);
         let charPosition = charSizeF32 * vec2(indexF32, 0);