// Update is called once per frame
void Update()
{
q_pitch = Quaternion.AngleAxis(pitch, Vector3.left);
q_azimuth = Quaternion.AngleAxis(azimuth, Vector3.up);
q_rot = q_pitch * q_azimuth;
#region transform local, not working
// None of code below works
// transformations are always in object local space
// rotation operates as a camera pan/tilt, not orbit around 0,0,0
// transform.SetPositionAndRotation(distance * Vector3.back, q_pitch * q_azimuth);
// transform.position = distance * Vector3.back;
// transform.rotation = q_pitch * q_azimuth;
// regular matrix multiplication does not work, matrix transformations are not stacked
//var matrix = Matrix4x4.TRS(distance * Vector3.back, MatrixExtensions.IdentityQuaternion, Vector3.one);
//matrix *= Matrix4x4.TRS(Vector3.zero, q_pitch * q_azimuth, Vector3.one);
//MatrixExtensions.TransformFromMatrix(transform, ref matrix);
#endregion
#region orbit y not using up vector
// hack1 orbit does not works, because y rotation happens in xz plane, not around vector up
// var matrix = MatrixExtensions.QuaternionToMatrix(q_rot);
// var fwd = MatrixExtensions.ExtractZAxisFromMatrix(ref matrix);
// transform.rotation = q_rot;
// transform.position = -distance * fwd;
// transform.rotation = Quaternion.LookRotation(fwd, Vector3.up); // this is no better
#endregion
// vert/horiz orbit working correctly
var matrix1 = MatrixExtensions.QuaternionToMatrix(q_pitch);
var matrix2 = MatrixExtensions.QuaternionToMatrix(q_azimuth);
transform.position = distance * Vector3.back;
transform.position = matrix1.MultiplyPoint(transform.position);
transform.position = matrix2.MultiplyPoint(transform.position);
// added track object
if (target != null)
{
transform.position += target.transform.position;
transform.LookAt(target.transform);
}
else
{
// just in case the target is removed
transform.LookAt(origin.transform);
}
}