Created
September 12, 2020 14:15
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Shadertoy wrapper
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| require 'erb' | |
| shadertoy = File.read(ARGV[0]) | |
| def shader_template | |
| %( | |
| #ifdef GL_ES | |
| precision mediump float; | |
| precision mediump int; | |
| #endif | |
| \/\/ ---------------------- | |
| \/\/ SHADERTOY UNIFORMS - | |
| \/\/ ---------------------- | |
| uniform vec3 iResolution; \/\/ viewport resolution (in pixels) | |
| uniform float iTime; \/\/ shader playback time (in seconds) | |
| uniform float iTimeDelta; \/\/ render time (in seconds) | |
| uniform int iFrame; \/\/ shader playback frame | |
| uniform vec4 iMouse; \/\/ mouse pixel coords. xy: current (if MLB down), zw: click | |
| uniform vec4 iDate; \/\/ (year, month, day, time in seconds) | |
| \/\/uniform float iChannelTime[2]; | |
| \/\/uniform vec3 iChannelResolution[2]; | |
| \/\/ Channels can be either 2D maps or Cubemaps. | |
| \/\/ Pick the ones you need and uncomment them. | |
| \/\/ uniform float iChannelTime[1..4]; \/\/ channel playback time (in seconds) | |
| \/\/ uniform vec3 iChannelResolution[1..4]; \/\/ channel resolution (in pixels) | |
| /* | |
| uniform sampler2D iChannel0; | |
| uniform sampler2D iChannel1; | |
| uniform sampler2D iChannel2; | |
| uniform sampler2D iChannel3; | |
| uniform samplerCube iChannel0; | |
| uniform samplerCube iChannel1; | |
| uniform samplerCube iChannel2; | |
| uniform samplerCube iChannel3; | |
| uniform vec3 iChannelResolution[4]; \/\/ channel resolution (in pixels) | |
| uniform float iChannelTime[4]; \/\/ Channel playback time (in seconds) | |
| */ | |
| void mainImage( out vec4 fragColor, in vec2 fragCoord ); | |
| void main() { | |
| mainImage(gl_FragColor,gl_FragCoord.xy); | |
| } | |
| \/\/ Shadertoy code | |
| <%= shadertoy %> | |
| \/\/ End of Shadertoy code | |
| ) | |
| end | |
| renderer = ERB.new(shader_template) | |
| output = renderer.result | |
| File.write('wrapper.glsl', output) |
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