   Need help for Particle to Object Collision?
  Hi all,I m working on a 1st Person Shooting Game.I have developed my particle system(Fire Gun)I want that when a particle is emitted from the gun, it should destroy when it intersects withan object(character)or the walls of the arena.I also have implemented the ray tracing methodto pick out the clicked object.If someone suggests me to use D3DXIntersect()then how?  
  I would say that you don''t need to check for collision between each individual particle and your world.  That would be incredibly slow.Try to use some kind of bounding volume.  If your particle effect is basically a kind of flamethrower, then maybe you could use a cone as your bounding volume.  Then intersect this cone with the bounding volumes of the other geometry in the vecinity.  This will tell you if your particle system has hit anything.neneboricua 