void
Camera::strafeCamera(float speed)
{
// Strafing is quite simple if you understand what the cross product is.
// If you have 2 vectors (say the up vVector and the view vVector) you can
// use the cross product formula to get a vVector that is 90 degrees from the 2 vectors.
// For a better explanation on how this works, check out the OpenGL "Normals" tutorial at our site.
// In our new Update() function, we set the strafing vector (m_vStrafe). Due
// to the fact that we need this vector for many things including the strafing
// movement and camera rotation (up and down), we just calculate it once.
//
// Like our MoveCamera() function, we add the strafing vector to our current position
// and view. It's as simple as that. It has already been calculated in Update().
V3f vStrafe = V3f::cross(mView - mEye, mUp);
vStrafe.normalize();
// Add the strafe vector to our position
*mEye.x += vStrafe.getX() * speed;
*mEye.z += vStrafe.getZ() * speed;
// Add the strafe vector to our view
*mView.x += vStrafe.getX() * speed;
*mView.z += vStrafe.getZ() * speed;
// applyToGL();
}
void
Camera::rotateView(float angle, const V3f& vec)
{
rotateView(angle, vec.getX(), vec.getY(), vec.getZ());
}
