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.
37 lines
795 B
GLSL
37 lines
795 B
GLSL
// Author @patriciogv ( patriciogonzalezvivo.com ) - 2015
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
#define PI 3.14159265358979323846
|
|
#define TWO_PI 6.28318530717958647693
|
|
#define PHI 1.618033988749894848204586834
|
|
|
|
uniform vec2 u_resolution;
|
|
uniform float u_time;
|
|
|
|
vec2 tile(vec2 _st, float _zoom){
|
|
_st *= _zoom;
|
|
return fract(_st);
|
|
}
|
|
|
|
float X(vec2 _st, float _width){
|
|
float pct0 = smoothstep(_st.x-_width,_st.x,_st.y);
|
|
pct0 *= 1.-smoothstep(_st.x,_st.x+_width,_st.y);
|
|
|
|
float pct1 = smoothstep(_st.x-_width,_st.x,1.0-_st.y);
|
|
pct1 *= 1.-smoothstep(_st.x,_st.x+_width,1.0-_st.y);
|
|
|
|
return pct0+pct1;
|
|
}
|
|
|
|
void main(void){
|
|
vec2 st = gl_FragCoord.xy/u_resolution.xy;
|
|
st = tile(st,10.0);
|
|
|
|
vec3 color = vec3(X(st,0.03));
|
|
|
|
gl_FragColor = vec4(color,1.0);
|
|
}
|