Bouncing unit off wall affect

i searched and i found vector system, rolling boulder ect..

i dont understand jass. when my ball unit hits a wall i want him to bounce. i have a slide affect for my ball unit. my ball unit slides towards the facing of ball unit. so basicly when he hits wall i want his direction to flip (bounce). any way of doing this with out jass? or giving me a jass peace that a dummie can under stand?

The easiest way I found is to have a constant value for how much the unit will be moved by X/Y. When a unit hits a wall, let's say that's above it, you then set the Y value to -1 * Y. When it would hit a wall to either side (left/right) you'd set the X movement to -1 * X. This is the only way I know of doing it, though I'm sure there's some formula for getting the opposite angle.

how would i detect it hitting the wall?

It's pretty simple. By a wall, I'm sure you're referring to a cliff. You just check the cliff level of the X/Y position before moving the unit, if it's higher than the cliff level the unit is currently on, it's a wall.

xy as in position? what triggers would i set up to do that? checking it and all that....

Unfortunately it's not that simple. You also have to know the orientation of the cliff and the direction of the ball in order to determin the reflected angle.

can you give me an example? what he event condition and actions would look like... im sure i could figure it out if i have something to work with

There really isn't an event you can use. There should be a condition that is checked when the ball is sliding into a wall like the one wyrmlord mentioned. After that you have to determine the orientation of the wall. There have been a few different methods of doing this and usually they include placing a set of dummy units and performing some observations about their location. After that it's simply a matter of changing the velocity of the ball according to the Law of Reflection.

Yeah, you need a big nest of regions and a tolerance for high lag if you go that stuff in GUI.

If you're just using cliffs, you shouldn't need to. You just check for cliff level/pathing for the X and then Y coordinates, if either of them are on unpathable terrain, you simply multiply the change in X/Y by -1.

Cliffs can appear with lengths on more than one axis.

can some one tell me what triggers i would use?
i assumed that but that dosent work. ang is the angle of unit, point on is the position its duna move very 20 secs and ball is the ball...

You have a common mistake. You need some way of changing the facing angle of the unit when it hits the cliff, or it will just slide along it for eternity.

doing it some how like in this jesp? http://www.wc3campaigns.net/showthre...ht=rubber+ball there must be some where!

Also, why are you using "Ball[(Integer A)]". Where's that (Integer A) coming from? Additionally, you may want to change that "x -1.00) degrees" to "- 180.00) degrees". If I remember correctly, 10? x -1 = -10?, which is actually 350?...