void test_sphere_intersection_point(void){
struct ray r = create_ray(create_point(0,0,0),create_vector(1.3,0,0));
struct sphere s = create_sphere(create_point(2.5,0,0),1.2);
struct maybe_point test = sphere_intersection_point(r,s);
checkit_double(test.p.x,1.3);
checkit_double(test.p.y,0);
checkit_double(test.p.z,0);
checkit_int(test.isPoint,1);
struct ray r2 = create_ray(create_point(-2.4,-2.9,-4.4),create_vector(-1,0,0));
struct sphere s2 = create_sphere(create_point(2.3,5.7,8.2),1);
struct maybe_point test2 = sphere_intersection_point(r2,s2);
checkit_int(test2.isPoint,0);
struct ray r3 = create_ray(create_point(-4.3,0,4.7),create_vector(3.5,0,0));
struct sphere s3 = create_sphere(create_point(2.1,0,0),4.7);
struct maybe_point test3 = sphere_intersection_point(r3,s3);
checkit_int(test3.isPoint,1);
struct ray r4 = create_ray(create_point(1.2,-5.4,4.2),create_vector(1.1,1.2,1.3));
struct sphere s4 = create_sphere(create_point(4.7,6.4,2.2),13.5);
struct maybe_point test4 = sphere_intersection_point(r4,s4);
checkit_double(test4.p.x,9.871860);
checkit_double(test4.p.y,4.060210);
checkit_double(test4.p.z,14.448561);
checkit_int(test4.isPoint,1);
}
int find_intersection_points(struct sphere spheres[], int num_spheres, struct ray r,
struct sphere hit_spheres[], struct point intersection_points[]){
int hit = 0;
for(int i =0; i<num_spheres; i++){
struct maybe_point point = sphere_intersection_point(r, spheres[i]);
if(point.isPoint ==1){
hit_spheres[hit] = spheres[i];
intersection_points[hit] = point.p;
hit++;
}
}
return hit;
}
int find_intersection_points(struct sphere spheres[], int num_spheres, struct ray r, struct sphere hit_spheres [], struct point intersection_points[])
{
int i;
int position = 0;
struct maybe_point maypoint;
for (i = 0; i < num_spheres; i++)
{
maypoint = sphere_intersection_point(r, spheres[i]);
if (maypoint.isPoint == 1)
{
hit_spheres[position] = spheres[i];
intersection_points[position++] = maypoint.p;
}
}
return position;
}
int find_intersection_points(struct sphere spheres[], int num_spheres, struct ray r, struct sphere hit_spheres[],struct point intersection_points[])
{
int i;
int counter;
for(i=0,counter=0;i<num_spheres;i++)
{
struct maybe_point mp = sphere_intersection_point(r,spheres[i]);
if( mp.isPoint==1)
{
hit_spheres[counter]=spheres[i];
intersection_points[counter]=mp.p;
counter++;
}
}
return counter;
}
