registry MOSH

Flow Smear · 111

capabilities open MOSH

Code-native visual signature / Dimensional

flowSmear

Flow Smear

The image drags along whatever is actually moving. Wave your hand and reality follows it.

Category: Dimensional
Parameters: 2
Registry no.: 111 / 143

Run Flow Smear in the browser

What it reads

Motion aware Reads optical flow, so what it does follows whatever is actually moving in the shot.

Parameters

param	key	range	default
Drag	`amount`	0..1 (rendered to 2)	0.55
Reach	`reach`	0..1	0.5

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": "flowSmear", "params": { "amount": 0.55, "reach": 0.5 } }

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(){ vec2 f = flowAt(vUv); // Six taps walked backwards along the flow vector. A single offset only // shifts the image; a walk leaves a wake, which is what reads as drag. vec2 step = f * uAmount * 0.09 * (0.4 + uReach); vec4 acc = texture2D(uTex, vUv); float w = 1.0; for (int i = 1; i < 6; i++) { float fi = float(i); float wi = 1.0 - fi / 6.0; acc += texture2D(uTex, clamp(vUv - step * fi, 0.0, 1.0)) * wi; w += wi; } gl_FragColor = acc / w; }

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Other Dimensional effects

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