registry MOSH

Topographic · 096

capabilities open MOSH

Code-native visual signature / Color Chaos

topoContour

Topographic

Luminance contour bands rendered as animated rainbow elevation lines — like a live topo map.

Category: Color Chaos
Parameters: 3
Registry no.: 096 / 143

Run Topographic 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
Mix	`amount`	0..1 (rendered to 2)	0.85
Bands	`bands`	3..30	10
Cycle	`speed`	0..2	0.4

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": "topoContour", "params": { "amount": 0.85, "bands": 10, "speed": 0.4 } }

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 c = texture2D(uTex, vUv); float lum = dot(c.rgb, vec3(0.299, 0.587, 0.114)); float t = lum * uBands + uTime * uSpeed * 0.3; float band = fract(t); float line = 1.0 - smoothstep(0.0, 0.06, min(band, 1.0 - band)); float hue = floor(t) / uBands + uTime * uSpeed * 0.04; vec3 fillCol = hsv2rgb(vec3(fract(hue), 0.85, 0.9)); vec3 lineCol = hsv2rgb(vec3(fract(hue + 0.5), 1.0, 1.0)); vec3 topo = mix(fillCol, lineCol, line); gl_FragColor = vec4(mix(c.rgb, topo, uAmount), c.a); }

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Other Color Chaos effects

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