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Add S-curve contrast to camera: more black, punchier highlights 

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
kbanc85 2026-02-15 13:18:42 -05:00
parent 9fd19824ab
commit fe3ef6366a
1 changed files with 14 additions and 7 deletions
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21
src/lib/scenes/camera-scene.ts
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@ -25,12 +25,18 @@ function camHash(x: number, y: number, b: number): number {
return ((x * 73856093) ^ (y * 19349663) ^ (bBits * 83492791)) >>> 0;
}
// S-curve contrast: pushes darks to black, boosts brights
function contrastCurve(b: number): number {
return b < 0.5 ? 2 * b * b : 1 - 2 * (1 - b) * (1 - b);
}
function brightnessToChar(b: number, x: number, y: number): string {
if (b < 0.05) return " ";
const h = camHash(x, y, b);
if (b < 0.2) return CAM_DUST[h % CAM_DUST.length];
if (b < 0.45) return CAM_LOW[h % CAM_LOW.length];
if (b < 0.7) return CAM_MID[h % CAM_MID.length];
const c = contrastCurve(b);
if (c < 0.08) return " ";
const h = camHash(x, y, c);
if (c < 0.25) return CAM_DUST[h % CAM_DUST.length];
if (c < 0.5) return CAM_LOW[h % CAM_LOW.length];
if (c < 0.75) return CAM_MID[h % CAM_MID.length];
return CAM_FULL[h % CAM_FULL.length];
}
@ -40,8 +46,9 @@ function brightnessToColor(
y: number,
t: number
): string {
if (b < 0.05) return "";
const clamped = Math.min(b, 1);
const c = contrastCurve(b);
if (c < 0.08) return "";
const clamped = Math.min(c, 1);
// Slow-drifting phase creates shifting color bands across the frame
const phase = Math.sin(x * 0.2 + y * 0.15 + t * 0.4) * 0.5 + 0.5;