#include "structs.h"
#include "collision.h"
#include "vectorOp.h"

RGBA raytraceSphere(sphere *obj, ray *lightray) {
    RGBA pixel;
    pixel.r = 0;
    pixel.g = 0;
    pixel.b = 0;
    pixel.a = 1;

    vec3 collisionPoint = collisionPointSphere(lightray, obj);
    if (collisionPoint.x == -1) {return pixel;}
    vec3 sphereNormal = vec3Normalize(vec3Subtract(collisionPoint, obj->origin));
    pixel.r = -vec3Product(sphereNormal, lightray->direction);
    return pixel;

}