@Override
public boolean shadowHit(Ray ray, float tSubZero, float tSub1, float time) {
Vector3D direction = ((Vector3D) ray.getDistanceVector());
Vector3D temp = ray.getOrigin().subtract(origin);
float a = direction.getDotProduct(direction);
float b = 2 * direction.getDotProduct(temp);
float c = (float) (temp.getDotProduct(temp) - (radius * radius));
float discriminant = b * b - 4 * a * c;
if (discriminant > 0) {
double sqrtd = Math.sqrt(discriminant);
float tVal = (float) ((-b - sqrtd) / (2 * a));
if (tVal < tSubZero) {
tVal = (float) ((-b + sqrtd) / (2 * a));
}
if (tVal < tSubZero || tVal > tSub1) {
return false;
}
return true;
}
return false;
}
@Override
public boolean hit(Ray ray, double tSubZero, double tSubOne, float time) {
Vector3D d = ((Vector3D) ray.getDistanceVector());
Vector3D originCenter = ray.getOrigin().subtract(origin);
float a = d.getDotProduct(d);
float b = 2 * d.getDotProduct(originCenter);
float c = (float) (originCenter.getDotProduct(originCenter) - (radius * radius));
float discriminant = b * b - 4 * a * c;
if (discriminant > 0) {
double sqrtd = Math.sqrt(discriminant);
float tVal = (float) ((-b - sqrtd) / (2 * a));
if (tVal < tSubZero) {
tVal = (float) ((-b + sqrtd) / (2 * a));
}
if (tVal < tSubZero || tVal > tSubOne) {
return false;
}
t = tVal;
return true;
}
return false;
}