60 lines
1.1 KiB
GLSL
60 lines
1.1 KiB
GLSL
// Lightning
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// By: Brandon Fogerty
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// bfogerty at gmail dot com
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// xdpixel.com
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// MORE MODS BY 27
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#ifdef GL_ES
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precision lowp float;
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#endif
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uniform float time;
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uniform vec2 resolution;
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float Hash( vec2 p)
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{
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vec3 p2 = vec3(p.xy,1.0);
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return fract(sin(dot(p2,vec3(37.1,61.7, 12.4)))*858.5453123);
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}
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float noise(in vec2 p)
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{
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vec2 i = floor(p);
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vec2 f = fract(p);
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f *= f * (3.0-2.0*f);
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return mix(mix(Hash(i + vec2(0.,0.)), Hash(i + vec2(1.,0.)),f.x),
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mix(Hash(i + vec2(0.,1.)), Hash(i + vec2(1.,1.)),f.x),
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f.y);
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}
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float fbm(vec2 p)
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{
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float v = 0.0;
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v += noise(p*1.)*2.200;
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v += noise(p*2.)*0.00025;
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v -= noise(p*4.)*3.125;
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v += noise(p*8.)*.00625;
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v += noise(p*16.)*0.00625;
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return v;
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}
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void main( void )
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{
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vec2 uv = ( gl_FragCoord.xy / resolution.xy ) * 2.0 - 1.0;
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uv.x *= resolution.x/resolution.y;
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uv /= max(resolution.x, resolution.y) / 30.0;
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vec3 finalColor = vec3( 0.0 );
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for( int i=1; i < 2; ++i ) {
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float t = abs(2.0 / ((uv.x + fbm( uv + time/float(i)))*75.));
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finalColor += t * vec3( float(i) * 6.2 +0.2, 1.2, 13.0 );
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}
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gl_FragColor = vec4( finalColor, 1.0 );
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}
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