Orbiting Objects

[Strider]

Thank ya sir.

[Doc4]

Sorry to dredge up an old thread, but is it possible to get the orbiting movement with Nifflas's example to work but starting at different points in the circle?

I don't want all the orbiting objects to start from the same position.


Thanks,

Tom / Doc4

[Dynasoft]

Yes, just set the "rotation" alterable value to a random number when you create the object.

[Doc4]

Well OBVIOUSLY that's the easy answer, Dynasoft. You'd have to be an idiot not to know that.

** smugly walks away until out of sight where he writes the answer down with excitement **

[Doc4]

I have a ship fly towards a planet and, within a distance of 50, start to orbit. How can I set the ship's rotation start point based on where it is in reference to to planet?

I tried using Get Direction from the ADO, but it doesn't work as intended.

I want the ship to get within 50 and start orbit from that same spot.

Thanks,

Tom / Doc4

[Dynasoft]

You need to get the angle from the planet to the craft. I think.

Does MMF have atan2 yet?

[Doc4]

I've done ship to planet and planet to ship. It keeps putting the ship at unexpected locations.

Unfortunately my math skills do not extend beyond A+1=2. I had to copy and paste the Sin/Cos code from this thread to get things working to begin with.

Any suggestions?

Here are some screen shots if they are of any use.


http://img412.imageshack.us/my.php?image=radiushelpmh5.png

[Dynasoft]

The formula isn't quite right, it should be the following to match MMF's angles:
[Always]
Set X Position of "Orbiter" to X( "Center of rotation" )+Cos(Rotation( "Orbiter" ))*Distance( "Orbiter" )
Set Y Position of "Orbiter" to Y( "Center of rotation" )-Sin(Rotation( "Orbiter" ))*Distance( "Orbiter" )

And initial rotation should be: (advanced direction object) longdir(planet x, planet y, ship x, ship y) with number of directions set to 360.

[Doc4]

Works perfectly. Angles all line up.

The ship's captain would like to thank you for fixing the abrupt time/space leaping when he tried to orbit. He no longer needs a ship's chiropractor on staff.


Tom / Doc4