// title: sketch-2020-01-10-00-58 // author: yue #ifdef GL_ES precision mediump float; #endif uniform vec2 u_resolution; uniform vec2 u_mouse; uniform float u_time; void main(){ vec2 st=gl_FragCoord.xy/u_resolution.xy-.5; vec2 p=2.*st-vec2(1.); float s_time=sin(u_time); float c_time=cos(u_time); float f=4.*c_time*cos((50.*s_time)*st.x)+(10.*s_time)*cos(20.*st.y); vec3 col=.5+.5*sin(3.1416*f+vec3(st.xy,abs(c_time))); gl_FragColor=vec4(col,1.); }