Real gun effect and grenade

How would you make an ability, like in Elimination Tournament, shoot a bullet, but once it hits a wall, or an object/person, it stops?

and also how would you make a grenade type ability, just like the one in elimination tournament, i have no clue on the grenade..

Please help me, i really want to know how! =] Ill be super greatful! and ill love you forever! If possible in JASS id love it!

... Try PM aitarf, or iNFrane Tiku ask them fist if they don't tell you then ask the community.

-Av3n

Heres an ssytem they made it is here http://www.wc3campaigns.net/showthread.php?t=87027

Okay sorry.. =/ Yeah i have the vector functions but ill try messin with it

actually, that is part of it. The main system uses it.
http://www.wc3campaigns.net/showthread.php?t=87031 is the main system. It moves all the bullets/grenades.

From the example in the map you could easily work out how to do bullets.

kk thanks infrane! =]]