mirror of
https://github.com/patriciogonzalezvivo/thebookofshaders
synced 2024-11-09 19:10:24 +00:00
32 lines
755 B
GLSL
32 lines
755 B
GLSL
// Author @patriciogv - 2015
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// http://patriciogonzalezvivo.com
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#ifdef GL_ES
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precision mediump float;
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#endif
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uniform vec2 u_resolution;
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uniform vec2 u_mouse;
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uniform float u_time;
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float random (vec2 st) {
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return fract(sin(dot(st.xy,
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vec2(12.9898,78.233)))*
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43758.5453123);
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}
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void main() {
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vec2 st = gl_FragCoord.xy/u_resolution.xy;
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st *= 10.0; // Scale the coordinate system by 10
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vec2 ipos = floor(st); // get the integer coords
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vec2 fpos = fract(st); // get the fractional coords
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// Assign a random value based on the integer coord
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vec3 color = vec3(random( ipos ));
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// Uncomment to see the subdivided grid
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// color = vec3(fpos,0.0);
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gl_FragColor = vec4(color,1.0);
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} |