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OverlayBlend

by Mewatools

Blends 2 images using the overlay blend method.

Script
// "OverlayBlend" by Mewatools <hugo@mewatools.com> is licensed under CC BY 4.0 // Brief: Blends 2 images using overlay blend method function OverlayBlend( nodegraph ) { shaderSource = " vec3 blend(vec3 a, vec3 b) { float light = (a.x + a.y + a.z) / 3.0; if( light < threshold ){ return 2. * a * b; } return 1. - 2.*(1.-a)*(1. - b); } void mainImage( out vec4 fragColor, in vec2 fragCoordA, in vec2 fragCoordB ){ vec3 a = texture2D(iChannel0, fragCoordA).rgb; vec3 b = texture2D(iChannel1, fragCoordB).rgb; fragColor = vec4( blend(a,b), 1.0 ); }"; node = nodegraph.addShaderNode( shaderSource, "OverlayBlend" ); node.addShaderInput( "iChannel0" ); node.addShaderInput( "iChannel1" ); uiControl = node.addFloatControl("threshold", 0.5); uiControl.setName("Threshold"); uiControl.setStep(0.0001); uiControl.setRange(0.0, 1.0); node.setReady(); }
File Details
  • File Name: OverlayBlend.mw
  • Last Update: November 29th, 2020
  • Extends: Nodegraph
CC BY