Curving a Rainbow

Roderic

I'm trying to create an actor where the user can swipe and it will draw an arched rainbow. I figured out how to make it draw a straight line rainbow, but I can't figure out how to make it curved. Does anyone have any suggestions? Thanks.

tenrdrmer

Check out sin and cos in the wiki.

Sparkyidr

Like t-Shirt says.
the best you can do is :
http://gamesalad.com/forums/topic.php?id=16974
Check the vids a few posts into the thread showing the real time corners

It's not ideal, but works using the sin function.

Roderic

Thanks guys. I'll let you know if I can get it to work.

tenrdrmer

Couldn't you spawn the actor and then stretch its width out from the spawn point and use sin and/or cos to make it arc?

Sparkyidr

nah, that would still count as bitmap manipulation, which gamesalad can't do.

Roderic

Well, I couldn't figure it out with sin and cos, so I made a workaround using interpolate. It won't really be the user drawing it per se, but at least they can resize it and move it around.

I knew I should have paid better attention in calculus... but oh boy that was so long ago. Ha.