How to make Rain Particles fall sideways?

(5 posts) (2 voices)

Tags:

davidthecoder
Member

How do I make my rain particles fall from the upper right to the lower left, (make it look as if wind where pushing it)?

Posted 10 months ago #
Birkemose
Moderator

If you are using a physics engine, you could fiddle with gravity.
If you dont want to do that, you could manually apply sideways motion.

Posted 10 months ago #
davidthecoder
Member

how do i manually apply sideways motion?

Posted 10 months ago #
Birkemose
Moderator
Iterate through the bodies, and simply adjust Y position.
```
body.pos = CGPointMake( body.pos.x, body.pos.y + ( movementPrSecond * timeInterval ) );
```
Without having thought to much about it, this would be my first solution. Would be fast, and very easy to implement small changes. Maybe a subtle randomness, or areas with slightly more movement, to simulate small gusts of winds ... or something.

EDIT:
Would of cause probably be X direction.

EDITEDIT:
This works with chipmunk, but since box2d uses another approach for collision detection, it might break something to manually move bodies around. I dont know.
Posted 10 months ago #
davidthecoder
Member

thank you Birkemose! :D

Posted 10 months ago #

Reply

You must log in to post.