Licson Lee says to YSITDuniform vec2 resolution; void main() { vec2 coord = gl_fragcoord / resolution; if (distance(coord, vec2(x, y)) <= r) gl_fragcolor = vec4(1., 1., 1., 0.); else gl_fragcolor = vec4(0., 0., 0., 0.); }at Wed, Sep 29, 2021 10:51 PM