​

uniform vec2 u_resolution;

uniform vec2 u_points[18];  // Just as an example, adjust the size as needed.

​

void main() {

    vec2 st = gl_FragCoord.xy/u_resolution;

    float d = -0.2;

    for (int i = 0; i < 18; i++) {

        if (length(st - u_points[i]) < d) {

            gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);

            return;

        }

    }

    gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);  // Render everything else as green

}

​

​