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WIP: improve viz

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This commit is contained in:
Julien Maille 2026-01-31 12:53:13 +01:00
parent fd7bae6b80
commit ba633237aa
1 changed files with 16 additions and 4 deletions
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20
js/visualizers/unknown_pleasures.js
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@ -14,6 +14,10 @@ export class UnknownPleasuresPreset {
this._palette = null;
this._paletteColor = '';
// Rotation constants (cached for performance)
this.rotationAngle = Math.PI / 6; // 30 degrees
this._cos = Math.cos(this.rotationAngle);
this._sin = Math.sin(this.rotationAngle);
this.reset();
this._precompute();
}
@ -97,17 +101,25 @@ export class UnknownPleasuresPreset {
ctx.fillRect(0, 0, width, height);
}
const size = Math.hypot(width, height) * 1.42;
// Compute rotated bounding box that covers the entire viewport
// When rotating by angle θ, a WxH rectangle needs a bounding box of:
// rotatedW = |W*cos(θ)| + |H*sin(θ)|
// rotatedH = |W*sin(θ)| + |H*cos(θ)|
const rotatedW = Math.abs(width * this._cos) + Math.abs(height * this._sin);
const rotatedH = Math.abs(width * this._sin) + Math.abs(height * this._cos);
const size = Math.max(rotatedW, rotatedH) * 1.15; // 15% padding for safety
ctx.save();
ctx.translate((width + size) / 2, height / 2);
ctx.rotate(Math.PI / 6);
ctx.translate(-(width + size) / 2, -height / 2);
// Translate to center, rotate, then offset to position lines
ctx.translate(width / 2, height / 2);
ctx.rotate(this.rotationAngle);
ctx.translate(-size / 2, -size / 2);
// SINGLE shadow pass (cheap)
ctx.shadowColor = params.primaryColor;
ctx.shadowBlur = 32 * (1 + params.kick * 2);
ctx.lineJoin = 'round';
ctx.lineCap = 'round';
ctx.shadowOffsetX = params.kick * 10;
ctx.shadowOffsetY = params.kick * 10;
const horizonY = size * 0.1;