public MovableQuat(Matrix transform)
{
Matrix3 rotation = new Matrix3 (transform);
m_rotation = rotation.getQuaternion ();
m_position = transform.Translation;
m_scale = new Vector3 (1.0f);
}
public MovableQuat(Vector3 forward, Vector3 up, Vector3 position)
{
Matrix3 rotation = new Matrix3 (forward, up, true);
m_rotation = rotation.getQuaternion ();
m_position = position;
m_scale = new Vector3 (1.0f);
}
public void decompose(out Vector3 scale, out Quaternion rotation)
{
EVector3 right = new EVector3 (this.Right);
scale.X = right.normalize ();
EVector3 up = new EVector3 (this.Up);
scale.Y = up.normalize ();
EVector3 forward = new EVector3 (this.Forward);
scale.Z = forward.normalize ();
Matrix3 m = new Matrix3 (right, up, forward);
rotation = m.getQuaternion ();
}
public MovableQuat(Matrix3 rotation)
{
m_rotation = rotation.getQuaternion ();
m_position = Vector3.Zero;
m_scale = new Vector3 (1.0f);
}
public void billboard(Camera camera)
{
Vector3 forward = camera.Position - m_position;
forward.Normalize ();
Matrix3 billboard = new Matrix3 (forward, camera.Up);
m_rotation = billboard.getQuaternion ();
}
