registry MOSH

Contour Map · 086

capabilities open MOSH

Code-native visual signature / Color Chaos

contourMap

Contour Map

Tone quantised into topographic bands.

Category: Color Chaos
Parameters: 2
Registry no.: 086 / 143

Run Contour Map in the browser

What it reads

Frame-local Reads only the current frame, which makes it the cheapest kind to stack and safe to render into a Conjure window at any size.

Parameters

param	key	range	default
Amount	`amount`	0..1 (rendered to 2)	0.7
Bands	`bands`	0..1	0.45

The renderer widens amount past its declared maximum by 2× before it reaches the shader, because most shader bodies were tuned against a muted top end. The rendered figure is the bound that actually arrives.

Defaults as a layer

{ "effectId": "contourMap", "params": { "amount": 0.7, "bands": 0.45 } }

GLSL fragment shader

The effect's own code. The uniforms and helpers above it — uTex, uFeedback, the depth proxy, the frame ring, depthAt(), timeAt() — are the same header every Ether-MOSH shader opens with, and are documented once on the registry rather than reprinted on all 143 pages.

void main(){ vec4 srcTex = texture2D(uTex, vUv); vec3 c = srcTex.rgb; float l = dot(c, vec3(0.299, 0.587, 0.114)); float n = mix(4.0, 26.0, uBands); float q = floor(l * n) / n; // Bright line exactly on each contour, like an elevation map. float edge = abs(fract(l * n) - 0.5) * 2.0; float line = smoothstep(0.86, 1.0, edge); vec3 banded = hsv2rgb(vec3(fract(0.62 - q * 0.72), 0.62, 0.35 + q * 0.75)); gl_FragColor = vec4(mix(c, banded + line * 0.55, uAmount), srcTex.a); }

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Other Color Chaos effects

143 effects / 5 categories / one GPU Back to the full registry