Mathematical Bounce

[HydraRancher]

I havent been able to find a good system which calculates a projectile bouncing off the wall, can anybody help?

 

[Nexor]

system for a bounce?

the main issue with the bounce off walls is the wall, not the calculation.

 

[LearningCode]

Oh, the irony;

1) Man asks question about bouncing
2) Another Man replies and the guy's avatar is of a ball.

 

[DrEvil]

Somebody trolling much ? (Hands up your Busted! *pow pow* )

To properly calculate bouncing off walls , you need to check around the unit ( in a few directions ) for pathable ,to find the way it was going and calculate the bounce off .
I think one of the meathook spells had something like that... maybe someone else can help more ..

 

[Laiev]

Oh, the irony;

1) Man asks question about bouncing
2) Another Man replies and the guy's avatar is of a ball.

:nuts:

 

[LearningCode]

Calculating like that only makes you go, like, a light ray.
As in, the dummy will bounce unnaturally.

Unless it is off a wall..
Does he mean bouncing up and down or off walls? o.0

[EDIT]
Wait-
I just re-read the first post xD

[EDIT=2]
Hmm..
Place invisible path blockers that you want the ball to bounce off of.
With the trigger, make the ball move (I assume you already can do that)
Then, every 0.03125 seconds, check if the ball is within a certain AoE of the pathing block, (A small value and make sure it gets the nearest pathng blocker)
if so, Get the angle between the ball and blocker and inverse it, then, send the ball that direction.

 

[Laiev]

@Learning..

what do you smoke? :nuts:

you don't need to create doodads in all maps to block someunit to walk..

just check if is walkable

also if you check with this time lol

of course the map will lag

 

[Weep]

This is probably overkill, but it's the best physics simulation I've seen in WC3: Simple Entity Engine.

 

[Romek]

This is probably what you want, and isn't overkill like a full physics system.

 

[HydraRancher]

The only thing I want it to bounce off is Camera bounds, which I know you can check by checking 100.00 units ahead, then seeing if that distance is less than or equal to 10. All I need to know, is how to get it to bounce.

Note: If emjlr3's calculation is correct, can somebody write it up in GUI? Or in a non-JASS type

 

[HydraRancher]

bump

 

[TheDamien]

x0,y0,z0 is the direction of the incoming projectile.
x1,y1,z1 is the direction the wall is facing.
x2,y2,z2 is the new direction of the projectile after colliding with the wall.

d = x0*x1 + y0*y1 + z0*z1
x2 = x0 - 2*x1*d
y2 = y0 - 2*y1*d
z2 = z0 - 2*z1*d

 

[HydraRancher]

How would I implement that in GUI?