Sha256: fcf0f19cb423e6ccecf28f3636ad952e92531cfb28afc937b4dab38a310b4af5
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Size: 1.33 KB
Versions: 21
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Stored size: 1.33 KB
Contents
#version 330 core
#ifdef GL_ES
precision mediump float;
#endif
#extension GL_OES_standard_derivatives : enable
uniform float time;
uniform vec2 mouse;
uniform vec2 resolution;
out vec4 color_out;
#define PI 3.141592653589793
#define TWOPI 6.283185307179586
float rand(vec2 co) {
float a = 12.9898;
float b = 78.233;
float c = 43758.5453;
float dt= dot(co.xy ,vec2(a,b));
float sn= mod(dt,3.14);
return fract(sin(sn) * c);
}
vec2 rotate(float theta, vec2 v) {
float s = sin(theta);
float c = cos(theta);
mat2 R = mat2(c, s, -s, c);
return R * v;
}
void main(void) {
vec2 pos = gl_FragCoord.xy * 2. - resolution;
pos /= max(resolution.x, resolution.y);
pos *= 5.;
float l = length(pos);
pos = rotate(-pow(l, .5), pos);
pos *= .5;
vec3 mask = vec3(0.0);
const int len = 3;
for (int i = 0; i < len; i++) {
float theta = mod(-time, TWOPI) - PI * 2. * float(i) / float(len);
float phi = atan(pos.y, pos.x);
float delta = phi - theta;
delta = mod(delta + PI, TWOPI);
float r = smoothstep(0., TWOPI / float(len), abs(delta));
mask += vec3(pos, 1.) * vec3(1. - r);
}
vec4 color = vec4(mask.xy * pos, mask.z, 1.0);
float c = length(color.xy);
color.rg = rotate(1. + pow(c,1.2), color.rg);
color.gr = sin(color.rg * 10.);
color *= step(vec4(.5), color);
color_out = color;
}
Version data entries
21 entries across 21 versions & 1 rubygems