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Particle Collisions

by Diego Santos Leao - GameBlox Studio · in Torque X 2D · 10/02/2008 (6:39 pm) · 10 replies

Hello guys,

I'm having problems to set collisions on particles... for example, I want to create a smoke effect that collides with objects in scene spreading around them.

I've tryed everything, but it looks like TorqueX has this limitation... you can't get a reference to the objects that corresponds to the particles themselves. I can only get the emitter.

Does someone else had this problem? I know it is not very efficient, but I will use it only on cutscenes and specific points of the game.

Thanks!!
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Torque Owner Diego Santos Leao - GameBlox Studio
#1
11/02/2008 (11:31 am)
Not one person ever tried to do that? ^^
It's not even custom colision responses... just "clamp" collisions would do...

Torque Owner Christian Rousselle
Default Studio Name
#2
11/03/2008 (12:40 am)
I do not think that it currently works in TX. I looked through the code and did not find code that handles particle collisions - but I can be wrong. There have been threads about that before.

Torque Owner Diego Santos Leao - GameBlox Studio
#3
01/11/2009 (12:12 pm)
Does anyone knows a way to simulate that? I need to be able to move a fire effect when a sceneobject passes on it (like moving your finger on candle fire, or blowing the fire of it).

One of the ways I imagined was to create various emmiters, for each part I need to "move", and then use linkpoints to keep them together after the collision.

Any more ideas?

Torque Owner Tyler Slabinski
#4
01/11/2009 (1:47 pm)
I tried doing something similar to that. It was a flamethrower where each particle damages the object it touches.

Anyway, I couldn't get it to do what I wanted, so I am curious about this too.

Torque Owner Matthew Hoesterey
#5
01/14/2009 (9:26 am)
You'd have to modify or augment the particle code in the engine I believe.

Torque Owner Darthuvius
#6
04/28/2010 (2:52 pm)
A per particle flamethrower would be nice, I'm not sure if performance would be good for that though.

I'm trying to make a flamethrower as well, all I really need is for the collision polygon to equal the extent of the particle effect at any given time. I think this is possible. If you know how to do this please post :)

Torque 3D Owner Henry Shilling
Smokin Skull
#7
04/28/2010 (3:07 pm)
Yea right now you can set collision on the effect, but not on the particles themselves. If you were to create a particle effect that say spread in a cone shape set the collison to match this cone it would work. I have made projectiles that were particle effects. Explosions with collision as well.

Torque Owner Darthuvius
#8
04/28/2010 (3:38 pm)
Yeah, I set my collision polygon as a cone shape but the problem is that it is always this cone shape, at the beginning of the flamethrow the particle effect is a lot smaller than its collision polygon. I could mess around with the graphs to just make the effect a constant shape perhaps.

Silva's Zombie shooter has a particle effect flamethrower I think, I don't know if it's per particle collisions though. I'll ask him what he did.

Torque 3D Owner Henry Shilling
Smokin Skull
#9
04/28/2010 (6:29 pm)
He wrote his own particle emitter code for one. You could change the cone on the fly, or even turn collision on and off depending on if you are firing.

Torque Owner Darthuvius
#10
04/28/2010 (8:00 pm)
Yeah I figured he did. I looked at the torquex emitter code, I think I made a sceneobject out of every particle but that didn't work lol.

I think you can grab the bounds of every particle and then create a collision polygon based on that, but I'm not quite sure how to do the former and I have no idea how to do the latter in code.