| #ifdef GL_ES | |
| precision highp float; | |
| #endif | |
| uniform int frequency; | |
| uniform vec4 color0; | |
| uniform vec4 color1; | |
| varying vec2 v_st; | |
| void | |
| main() | |
| { | |
| float s, t, delta; | |
| s = mod(floor(v_st.x * float(frequency * 2)), 2.0); | |
| t = mod(floor(v_st.y * float(frequency * 2)), 2.0); | |
| delta = abs(s - t); | |
| gl_FragColor = mix(color1, color0, delta); | |
| } |