Orientation in space

[jogad]

Hello,

To improve my script generator I need to know how to calculate two angles during a rotation.

I get the initial rotation and final rotation with the instructions

Code: Select all

start_orientation = observer:getorientation()

and later

Code: Select all

end_orientation = observer:getorientation()

The two angles I need are

- Angle alpha between the two directions of vue
- The spin angle theta between the starting and the ending direction.

Here's a quick sketch to explain

orientation.png

The mathematical considerations on quaternions are beyond my understanding.
I just need to know how I can do with the instructions available in a celx script.

Can anyone help me?

[jogad]

Hello,

Let me try again by asking the question differently.

I have 2 rotations rot1 and rot2 (stored in Celestia as quaternion about which I do not understand anything )

How do I find the rotation that gives rot2 starting from rot1

[John Van Vliet]

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