mirror of
https://github.com/bvanroll/shaders.git
synced 2025-08-28 19:42:49 +00:00
24 lines
513 B
GLSL
24 lines
513 B
GLSL
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
uniform vec2 u_resolution;
|
|
uniform vec2 u_mouse;
|
|
uniform float u_time;
|
|
|
|
#define PI 3.14159265359
|
|
|
|
void main() {
|
|
vec2 st = gl_FragCoord.xy/u_resolution;
|
|
vec3 color = vec3(0.0,0.0,0.0);
|
|
float alpha = 1.0;
|
|
float dev = .25;
|
|
// the card itself has another way to do this, instead of 1.0-st.x+st.y it uses .5+(st.x-st.y)*.5
|
|
// which i like more
|
|
color += step(.45, (1.0-st.x+st.y)*.5)-step(.55, (1.0-st.x+st.y)*.5);
|
|
|
|
|
|
|
|
|
|
gl_FragColor = vec4(color, alpha);
|
|
}
|