You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.3 KiB
GLSL
45 lines
1.3 KiB
GLSL
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform vec2 u_mouse;
|
|
uniform float u_time;
|
|
|
|
vec2 random2(vec2 st){
|
|
st = vec2( dot(st,vec2(127.1,311.7)),
|
|
dot(st,vec2(269.5,183.3)) );
|
|
return -1.0 + 2.0*fract(sin(st)*43758.5453123);
|
|
}
|
|
|
|
// Gradient Noise by Inigo Quilez - iq/2013
|
|
// https://www.shadertoy.com/view/XdXGW8
|
|
float noise(vec2 st) {
|
|
vec2 i = floor(st);
|
|
vec2 f = fract(st);
|
|
|
|
vec2 u = f*f*(3.0-2.0*f);
|
|
|
|
return mix( mix( dot( random2(i + vec2(0.0,0.0) ), f - vec2(0.0,0.0) ),
|
|
dot( random2(i + vec2(1.0,0.0) ), f - vec2(1.0,0.0) ), u.x),
|
|
mix( dot( random2(i + vec2(0.0,1.0) ), f - vec2(0.0,1.0) ),
|
|
dot( random2(i + vec2(1.0,1.0) ), f - vec2(1.0,1.0) ), u.x), u.y);
|
|
}
|
|
|
|
void main() {
|
|
vec2 st = gl_FragCoord.xy/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
vec3 color = vec3(0.0);
|
|
|
|
float t = 1.0;
|
|
// Uncomment to animate
|
|
// t = abs(1.0-sin(u_time*.1))*5.;
|
|
// Comment and uncomment the following lines:
|
|
st += noise(st*2.)*t; // Animate the coordinate space
|
|
color = vec3(1.) * smoothstep(.18,.2,noise(st)); // Big black drops
|
|
color += smoothstep(.15,.2,noise(st*10.)); // Black splatter
|
|
color -= smoothstep(.35,.4,noise(st*10.)); // Holes on splatter
|
|
|
|
gl_FragColor = vec4(1.-color,1.0);
|
|
}
|