Ray.cpp

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#include "geolib/Ray.h"
 
namespace geo {
 
Ray::Ray(const Vector3 &o, const Vector3 &d) : origin_(o), direction_(d.normalized()), length_(0)
{
    calculateInvDirection();
 
    sign_[0] = (direction_.x < 0);
    sign_[1] = (direction_.y < 0);
    sign_[2] = (direction_.z < 0);
}
 
void Ray::calculateInvDirection()
{
    // Hardcoded EPS
    double inv_x = std::abs(direction_.x) < 1e-9 ? 0 : 1/direction_.x;
    double inv_y = std::abs(direction_.y) < 1e-9 ? 0 : 1/direction_.y;
    double inv_z = std::abs(direction_.z) < 1e-9 ? 0 : 1/direction_.z;
 
    inv_direction_ = geo::Vector3(inv_x, inv_y, inv_z);
}
 
}