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.
36 lines
745 B
GLSL
36 lines
745 B
GLSL
// Author @patriciogv - 2015 - patricio.io
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
#define PI 3.1415926535897932384626433832795
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform vec2 u_mouse;
|
|
uniform float u_time;
|
|
|
|
vec2 wave(vec2 st, float freq) {
|
|
st.y += cos(st.x*freq);
|
|
return st;
|
|
}
|
|
|
|
vec2 zigzag(vec2 st, float freq) {
|
|
st.y += mix(abs(floor(sin(st.x*3.1415))),abs(floor(sin((st.x+1.)*3.1415))),fract(st.x*freq));
|
|
return st;
|
|
}
|
|
|
|
float line(vec2 st, float width) {
|
|
return step(width,1.0-smoothstep(.0,1.,abs(sin(st.y*PI))));
|
|
}
|
|
|
|
void main(){
|
|
vec2 st = gl_FragCoord.xy/u_resolution.xy;
|
|
st.x *= u_resolution.x/u_resolution.y;
|
|
|
|
st *= 10.;
|
|
st = wave(st, 3.);
|
|
vec3 color = vec3(line(st,.5));
|
|
gl_FragColor = vec4(color, 1.0);
|
|
}
|