Math Pros- I need help with Tshirt's Orbit Demo

giacomopoppi · June 2011

Hi everyone, I am having problems with Tshirts Orbit template which you can find here:

basically I need to be able to get the orbiting object to start in another position during the orbit.
Is it possible to start the orbit from here: (for example)

or here:

?

Here is tshirtbooth's math from the demo:
100*cos( self.Time *-200%360)+ game.sunX
100*sin( self.Time *-200%360)+ game.sunY
vectorToAngle( game.sunX – self.Position.X , game.sunY – self.Position.Y )

thanks!

CodeMonkey · June 2011

You need to add an offset to the angle within the cos/sin functions.

100*cos(self.OffsetAngle+ self.Time *-200%360)+ game.sunX
100*sin(self.OffsetAngle+ self.Time *-200%360)+ game.sunY

This is assuming the self.Time starts at 0.

So set the self.OffsetAngle to 135 for the first image and 315 for the 2nd image. Or some angle close to those.

cmw333 · June 2011

Hi the send me your email as I think I have worked it out. What angle do you want to start at?

Code Monkey beat me to it. It's really easy.

Chris

giacomopoppi · June 2011

Thanks CodeMonkey, exactly what i needed

@cmw333 Thanks, I got the answer

tenrdrmer · June 2011

cmw333 said:
Hi the send me your email as I think I have worked it out. What angle do you want to start at?

Code Monkey beat me to it. It's really easy.

Chris

I've noticed you telling people to email you instead of helping them right here on the forum. Please try to solves peoples problems on the forum instead of immediately going to email. It will most likely be something others need help with in the future.

Thanks
Aaron

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cmw333 · June 2011

Sorry tenrdrmer just trying to help but your right. Probably the only time I was able to figure something out myself and jumped to the chance at helping another member.

Chris

Math Pros- I need help with Tshirt&#039;s Orbit Demo

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Math Pros- I need help with Tshirt's Orbit Demo