Anyone make an object rotate and move backwards in a circle?

jonmulcahy

I'm working on new game, and I'm having trouble making something work and look good at the same time. I've got a plane flying across the top of my screen, when it get's close to the edge, I want it to do a loop and head back in the other direction. Basically, I want it to fly in a big wide circle. Something like this but with rounded edges: <====>

I've tried implementing something out of the joystick controls (the one stick to move and rotate), but it's just not working right. Anyone work something out like this before?

jonmulcahy

as always, 5 minutes after I post I figured out a solution. Probably not the best way of doing things, but it worked for me. I'll post details in a few minutes

jonmulcahy

ok, here's what I did:

2 attributes: turnLeft & turnRight

2 Hot Zones, left and right. Each had a rule that said:
when overlap or collide with plane, set attribute turnLeft to 1
after 5 seconds, set attribute turnRight to 0

On my plane, I have a timer adjusting velocity every .1 seconds
every .1 seconds
change velocity to 150 at angle 0 relative to actor

and the rules to rotate
when turnLeft is 1, rotate to 180 relative to scene at speed 150 with run to completion checked

I did the same thing for right, now my plane flies in a nice circle, or at least the green block that represents my plane does

jonmulcahy

I uploaded a demo if anyone is interested

http://gamesalad.com/game/play/46465

adado

Pretty slick and no trig!