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CellularNoise1e.frag
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CellularNoise1e.frag
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#ifdef GL_ES
precision highp float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
//---------------------------------------------------------------------
#define MAX_POINTS 49
float circle(in vec2 _st, in float _radius) {
vec2 dist = _st - vec2(0.5);
return 1. - smoothstep(_radius - (_radius * 0.01),
_radius + (_radius * 0.01),
dot(dist, dist) * 4.0);
}
float shapeBorder(vec2 st, float radius, float width) {
return circle(st, radius) - circle(st, radius - width);
}
float random(in float x) {
return fract(sin(x) * 1e4);
}
//---------------------------------------------------------------------
void main() {
vec2 st = gl_FragCoord.xy/u_resolution.xy;
st.x *= u_resolution.x/u_resolution.y;
st *= 7.0;
st -= 3.;
vec3 color = vec3(.0);
vec2 circularMotion = vec2(sin(u_time), cos(u_time));
int pointsAmount = MAX_POINTS;
vec2 point[MAX_POINTS];
for (int i = 0; i < pointsAmount; i++) {
point[i] = vec2(random(14. * float(i) * 14.) + sin(abs(u_time + 3. + float(i))),
random(21. * float(i) * 14.) + cos(abs(u_time + 3. + float(i))));
}
// point[4] = (u_mouse/u_resolution);
float m_dist = 1.; // minimun distance
point[MAX_POINTS-1] = vec2(cos(u_time)) * 2.;
// Iterate through the points positions
for (int i = 0; i < pointsAmount; i++) {
float dist = distance(st, point[i]);
// Keep the closer distance
m_dist = min(m_dist, dist);
}
color *= shapeBorder(vec2(m_dist), m_dist + .2, .19);
color -= shapeBorder(vec2(m_dist), m_dist + .1, .19);
color -= step(.7, abs(sin(3. * m_dist))) * .35;
color *= vec3(st, .7);
gl_FragColor = vec4(color, 1.0);
}