//
// Created by ary on 29.07.2026.
//

#include "helper.h"
#include <stdlib.h>
#include <math.h>
#include "structs.h"

vec3 randUnitVector() {
    double x1,x2,lengthSquared;
    do {
        x1 = (rand() / (double) RAND_MAX) * 2 - 1; //random zahl zwischen -1 und 1
        x2 = (rand() / (double) RAND_MAX) * 2 - 1;
        lengthSquared = x1 * x1 + x2 * x2;
    }while (lengthSquared >= 1);

    double weirdFactor = 2.0 * sqrt(1.0 - lengthSquared);
    return (vec3){
        x1 * weirdFactor,
        x2 * weirdFactor,
        1.0 - 2.0 * lengthSquared};
}