Hello folks,

I am working on my orbital flight simulator. I recently implemented keyboard controls to fly spacecraft. However, I have some problems with velocity. I tried to press a key to move forward but it moves in off-course direction. With away from zero Z axis, I tried to rotate up, down, left, or right and it rotate (wrong) off-course direction. It only works with zero Z axis with both position and angular movement. Does anyone have or recommend good algorithms for movement control with any Z axis? I searched for that through Internet but did not find information much.

Code :
Quaternion<double> orientation(1.0);
 
void setTravelVelocity(double s)
{
       :
    travelVelocity = Vector3<double>(0, 0, s) * orientation;
       :
}
 
void update(double dt)
{
       :
    position += travelVelocity * dt;
    orientation += (angularVelocity * orientation) * dt;
    orientation.normalize();
       :
}

Thanks!
Sword7