collision on the particles !!

hi friends,
with ur heartiest help now i can create rain and other particle effects.But still there is one problem,"my rain is going through the rooms". How do i them to move into??
plezz help me.

one of the AUMs has a tutorial on that. it uses sprites instead of particles. to keep the blood from my entities going through the ground, i use content to check it the particle is in a solid.

hope this helps.

Julian

you also can do this with particles:

function not_in_house //function of your particle (my.function=not_in_house;)
{
if(content(my.x)==in_solid)
{
my.move=0;
my.function=0;//clear the particle
}
}

well, no. Sometimes a particle is "too fast" and just moves through a wall. If it then checks for content it won't be solid but empty space.
This method works IF the particles are slow and the walls a thick.

Each time you create a particle, find it's velocity and do a trace in that direction. Store the z-component of that trace-vector in one of the particle skills (skill_a,skill_b). That way you are only doing one "slow" operation per particle.

When the particle gets to that height, then make it stop, splash, splat, explode, or whatever.

One thing I noticed, is that while this stops the particles, if you have streak (or maybe beam too, I don't know) turned on, the streaks will continue past the point where the particle stops.

One disadvantage with this system: it doesn't work on moving platforms. For the most part, it looks good though.

Just an idea,

add some sprites to your particles and use them as reference.

In addition.. you can also check to be on_solid, then trace to see if it is on a roof texture, then move it downwards diagonally so it slides off the normal of the roof, and if it hits an invisible block about 1 unit off the roof, it will start to fall again.....

that would be too slow
there are too much particles for a trace from each one to the floor.
And with on_solid you mean content_solid, right? i didn't find an on_solid in the manual.
But content_solid would be too slow to realise that the particle is on a block.
It's only for entitys with collision.
sorry
But the idea was nice