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Fix VU needle visibility by keeping pivot within canvas

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This commit is contained in:
Metacube
2026-04-05 18:11:03 +02:00
parent 2db940988f
commit 7898fd07b8
1 changed files with 7 additions and 4 deletions
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vu1_gui.py
+7 -4
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@@ -416,6 +416,7 @@ body {
<div class="btn-row"> <div class="btn-row">
<button class="btn-sm" onclick="preset('iec_vu')">IEC VU</button> <button class="btn-sm" onclick="preset('iec_vu')">IEC VU</button>
<button class="btn-sm" onclick="preset('bbc_ppm')">BBC PPM</button> <button class="btn-sm" onclick="preset('bbc_ppm')">BBC PPM</button>
<button class="btn-sm" onclick="preset('natural_vu')">Natural VU</button>
<button class="btn-sm" onclick="preset('bouncy')">Bouncy</button> <button class="btn-sm" onclick="preset('bouncy')">Bouncy</button>
<button class="btn-sm" onclick="preset('heavy')">Heavy</button> <button class="btn-sm" onclick="preset('heavy')">Heavy</button>
<button class="btn-sm" onclick="preset('fast')">Fast</button> <button class="btn-sm" onclick="preset('fast')">Fast</button>
@@ -590,6 +591,7 @@ function preset(name){
const P={ const P={
iec_vu:{mass:1.0,damping:1.5,spring:4.0,gravity:0}, iec_vu:{mass:1.0,damping:1.5,spring:4.0,gravity:0},
bbc_ppm:{mass:0.3,damping:2.0,spring:12.0,gravity:0}, bbc_ppm:{mass:0.3,damping:2.0,spring:12.0,gravity:0},
natural_vu:{mass:1.35,damping:2.6,spring:6.4,gravity:0.1},
bouncy:{mass:0.6,damping:0.4,spring:6.0,gravity:0}, bouncy:{mass:0.6,damping:0.4,spring:6.0,gravity:0},
heavy:{mass:3.0,damping:2.5,spring:2.0,gravity:1.0}, heavy:{mass:3.0,damping:2.5,spring:2.0,gravity:1.0},
fast:{mass:0.1,damping:1.8,spring:15.0,gravity:0}, fast:{mass:0.1,damping:1.8,spring:15.0,gravity:0},
@@ -658,9 +660,10 @@ function drawVU(level, peak){
const ctx = vuCtx; const ctx = vuCtx;
ctx.clearRect(0,0,w,h); ctx.clearRect(0,0,w,h);
// Center pivot point // Center pivot point (inside canvas so needle is always visible)
const cx = w/2, cy = h + 40; const cx = w/2;
const radius = h + 20; const cy = h - 22;
const radius = Math.min(w * 0.45, h * 0.78);
// Scale arc // Scale arc
const arcStart = Math.PI + 0.35; const arcStart = Math.PI + 0.35;
@@ -703,7 +706,7 @@ function drawVU(level, peak){
// "VU" label // "VU" label
ctx.font = 'italic 24px "Instrument Serif"'; ctx.font = 'italic 24px "Instrument Serif"';
ctx.fillStyle = '#8a7a60'; ctx.fillStyle = '#8a7a60';
ctx.fillText('VU', cx, h*0.45); ctx.fillText('VU', cx, h*0.62);
// Sub minor ticks // Sub minor ticks
for(let p=0; p<=100; p+=2){ for(let p=0; p<=100; p+=2){