Simon Schneegans
36 lines
1.9 KiB
GLSL
36 lines
1.9 KiB
GLSL
//////////////////////////////////////////////////////////////////////////////////////////
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// ) ( //
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// ( /( ( ( ) ( ( ( ( )\ ) ( ( //
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// )\()) ))\ )( ( ( )\ ) )\))( )\ ( (()/( ( )\))( ( //
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// ((_)\ /((_|()\ )\ ) )\ '(()/( ((_)()((_) )\ ) ((_)))\((_)()\ )\ //
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// | |(_|_))( ((_)_(_/( _((_)) )(_)) _(()((_|_)_(_/( _| |((_)(()((_|(_) //
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// | '_ \ || | '_| ' \)) | ' \()| || | \ V V / | ' \)) _` / _ \ V V (_-< //
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// |_.__/\_,_|_| |_||_| |_|_|_| \_, | \_/\_/|_|_||_|\__,_\___/\_/\_//__/ //
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// |__/ //
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// Copyright (c) 2021 Simon Schneegans //
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// Released under the GPLv3 or later. See LICENSE file for details. //
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//////////////////////////////////////////////////////////////////////////////////////////
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// The content from common.glsl is automatically prepended to each shader effect.
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uniform float uNoise;
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uniform float uPixelSize;
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void main() {
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// We simply inverse the progress for opening windows.
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float progress = uForOpening ? 1.0 - uProgress : uProgress;
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// The current level of pixelation increases with the progress.
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float pixelSize = ceil(uPixelSize * progress + 1.0);
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vec2 pixelGrid = vec2(pixelSize) / uSize;
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vec2 texcoord = iTexCoord.st - mod(iTexCoord.st, pixelGrid) + pixelGrid * 0.5;
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vec4 oColor = getInputColor(texcoord);
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// Hide selected pixels based on some random noise.
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float random = simplex2DFractal(texcoord * uNoise * uSize / 1000.0) * 1.5 - 0.25;
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if (progress > random) {
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oColor.a *= max(0.0, 1.0 - (progress - random) * 20.0);
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}
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setOutputColor(oColor);
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} |