#version 300 es

precision highp float;

precision highp int;

​

uniform vec3      iResolution;           // viewport resolution (in pixels)

uniform float     iTime;                 // shader playback time (in seconds)

uniform float     iTimeDelta;            // render time (in seconds)

uniform float     iFrameRate;            // shader frame rate

uniform int       iFrame;                // shader playback frame

uniform float     iChannelTime[4];       // channel playback time (in seconds)

uniform vec3      iChannelResolution[4]; // channel resolution (in pixels)

uniform vec4      iMouse;                // mouse pixel coords. xy: current (if MLB down), zw: click

uniform vec4      iDate;                 // (year, month, day, time in seconds)

out vec4 fragColor;

​

​

/* ---- 

* To port examples from Shadertoy, just replace mainImage function bellow with content copied from Shadertoy 

* ----

*/

​

​

void mainImage( out vec4 fragColor, in vec2 fragCoord )

{

    // Normalized pixel coordinates (from 0 to 1)

    vec2 uv = fragCoord/iResolution.xy;

​

    // Time varying pixel color

    vec3 col = 0.5 + 0.5*cos(iTime+uv.xyx+vec3(0,2,4));

​

    // Output to screen

    fragColor = vec4(col,1.0);

}

​

​

// ---- How to port shaders from Shadertoy ----

​

​

void main() {

    mainImage(fragColor, gl_FragCoord.xy);

}