Confuse with Hpr

Scripting Issues
1

Ok… I feel very stupid to post this but it’s making me crazy…

I always though that the heading, in setH or getH was in degree… But with a strange bug in my game, I discover that it certainly not on 360 degree…

I have a dummy node use to rotate a satellite around a planet. I was printing his Hpr to correct another bug that is not related. But my surprise was that:

1- When I to this:

self.dummyNode.setH(self.dummyNode.getH() - (elapsed * speed))

It will never comme back to 0. It goes down like -100, -600, -100000, etc…

2- It take approximatly 1200 (I approximate) to make a complete turn around the planet…

Can someone explain me what is going on??? :open_mouth: :open_mouth: :question:

Thanks

If you have more question, I can give code

Jaff

2

the perfect book for all this basic physic stuff -> mel fundamentals for maya :smiley:

3

Sorry but I don’t understand.

Why did you post this code? I see it’s something rotating around a planet but my question was about Hpr… I’m pretty advance in my game and I tough I knew how Hpr were working but right now I’m confuse… Maybe some explication with your code?

thanks! :slight_smile:

Jaff

4

:smiley: sorry, it was a just experiment to figure out whats your problem is…

greetz
dirk

5

Is t a paper and ink book? Is it availible online? Is it free? How much does it cost if it is not free?

6

Well, the code you post guy is cool but it does not help me …

I guess I will figure it out myself

Thanks

Jaff

7

Ditus: Last warning.

Stop spamming - otherwise you will get banned.

Your Code has had nothing to do with the given problem. (removed the useless posts)

Regards, Bigfoot29

8

sorry, i thought this code could also be such nice in this tread. im going to post it into code snippsel. it just such a nice animated graphic whcih shows you how to rotate something around a other object.

sorry that i cant figure darkjaff´s problem.

best wishes

9

#1 problem goes from the modeling
check where the pivot point is

#2 Check your something like getMat().getRow(1)
the diferent values of getRow goes into diferrent result.
( dont know if this concern or not I just remember the *elapsed function in ralph sample )

#3 Check the orbital planet sample, might help you

#4 try deg2rad function

10

no, its all degrees, not radians.

The fact that you have set the H to, say, 20000 doesn’t matter - panda automatically wraps around. If you do getH and it still returns 20000, thats OK. Panda automatically does the wrapping around at 0 and 360.

Someone correct me if I’m wrong or if I understood the problem wrong.

11

Thanks to everyone

I realised this during the weekend. Thanks for your good explanation :slight_smile:

Have a great day.

Jaff