40 lines
927 B
GLSL
40 lines
927 B
GLSL
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform vec2 u_mouse;
|
|
uniform float u_time;
|
|
|
|
vec2 random2( vec2 p ) {
|
|
return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
|
|
}
|
|
|
|
void main() {
|
|
vec2 st = gl_FragCoord.xy/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
vec3 color = vec3(161./256., 174./256., 216./256.);
|
|
|
|
st *= 100.;
|
|
|
|
vec2 i_st = floor(st);
|
|
vec2 f_st = fract(st);
|
|
|
|
float m_dist = 1.;
|
|
|
|
for (int y= -1; y <= 1; y++) {
|
|
for (int x= -1; x <= 1; x++) {
|
|
vec2 neighbor = vec2(float(x),float(y));
|
|
vec2 point = random2(i_st + neighbor);
|
|
point = 0.5 + 0.5*sin(u_time + 6.2831*point);
|
|
|
|
m_dist = min(m_dist, length(neighbor + point - f_st));
|
|
}
|
|
}
|
|
|
|
color += 1.-m_dist;
|
|
color += 1.-smoothstep(0.01, .1, m_dist);
|
|
|
|
gl_FragColor = vec4(1.-color,1.0);
|
|
}
|