#define MAX_ITER 5

attribute vec4 a_position;

uniform int u_iter;
uniform vec4 u_deltas[MAX_ITER];

int my_min(int a, int b) {
    if (a < b) {
        return a;
    } else {
        return b;
    }
}

void main() {
    gl_Position = a_position; 
    for (int i = 0; i < my_min(u_iter, MAX_ITER); i++) {
        gl_Position += u_deltas[i];
    }
}