URL: http://glslsandbox.com/e#22893.1
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// Majestic Eye // By: Brandon Fogerty // bfogerty at gmail dot com // xdpixel.com #ifdef GL_ES precision mediump float; #endif uniform float time; uniform vec2 mouse; uniform vec2 resolution; #define HorizontalAmplitude 0.30 #define VerticleAmplitude 0.20 #define HorizontalSpeed 0.90 #define VerticleSpeed 1.50 #define ParticleMinSize 1.76 #define ParticleMaxSize 1.61 #define ParticleBreathingSpeed 0.30 #define ParticleColorChangeSpeed 0.70 #define ParticleCount 2.0 #define ParticleColor1 vec3(9.0, 5.0, 3.0) #define ParticleColor2 vec3(1.0, 3.0, 9.0) float hash( float x ) { return fract( sin( x ) * 43758.5453 ); } float noise( vec2 uv ) // Thanks Inigo Quilez { vec3 x = vec3( uv.xy, 0.0 ); vec3 p = floor( x ); vec3 f = fract( x ); f = f*f*(3.0 - 2.0*f); float offset = 57.0; float n = dot( p, vec3(1.0, offset, offset*2.0) ); return mix( mix( mix( hash( n + 0.0 ), hash( n + 1.0 ), f.x ), mix( hash( n + offset), hash( n + offset+1.0), f.x ), f.y ), mix( mix( hash( n + offset*2.0), hash( n + offset*2.0+1.0), f.x), mix( hash( n + offset*3.0), hash( n + offset*3.0+1.0), f.x), f.y), f.z); } float snoise( vec2 uv ) { return noise( uv ) * 2.0 - 1.0; } float perlinNoise( vec2 uv ) { float n = noise( uv * 1.0 ) * 128.0 + noise( uv * 2.0 ) * 64.0 + noise( uv * 4.0 ) * 32.0 + noise( uv * 8.0 ) * 16.0 + noise( uv * 16.0 ) * 8.0 + noise( uv * 32.0 ) * 4.0 + noise( uv * 64.0 ) * 2.0 + noise( uv * 128.0 ) * 1.0; float noiseVal = n / ( 1.0 + 2.0 + 4.0 + 8.0 + 16.0 + 32.0 + 64.0 + 128.0 ); noiseVal = abs(noiseVal * 2.0 - 1.0); return noiseVal; } float fBm( vec2 uv, float lacunarity, float gain ) { float sum = 0.0; float amp = 7.0; for( int i = 0; i < 2; ++i ) { sum += ( perlinNoise( uv ) ) * amp; amp *= gain; uv *= lacunarity; } return sum; } vec3 particles( vec2 pos ) { vec3 c = vec3( 0, 0, 0 ); float noiseFactor = fBm( pos, 0.01, 0.1); for( float i = 1.0; i < ParticleCount+1.0; ++i ) { float cs = cos( time * HorizontalSpeed * (i/ParticleCount) + noiseFactor ) * HorizontalAmplitude; float ss = sin( time * VerticleSpeed * (i/ParticleCount) + noiseFactor ) * VerticleAmplitude; vec2 origin = vec2( cs , ss ); float t = sin( time * ParticleBreathingSpeed * i ) * 0.5 + 0.5; float particleSize = mix( ParticleMinSize, ParticleMaxSize, t ); float d = clamp( sin( length( pos - origin ) + particleSize ), 0.0, particleSize); float t2 = sin( time * ParticleColorChangeSpeed * i ) * 0.5 + 0.5; vec3 color = mix( ParticleColor1, ParticleColor2, t2 ); c += color * pow( d, 10.0 ); } return c; } void main( void ) { vec2 uv = ( gl_FragCoord.xy / resolution.xy ) * 2.0 - 1.0; uv.x *= ( resolution.x / resolution.y ); vec3 finalColor = particles( sin( abs(uv) ) ) * length(uv); gl_FragColor = vec4( finalColor, 1.0 ); } |