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Tommi
02-02-2003, 07:23 PM
Via FX Linker I attached a model of a blood cell to a particle emitter. Unfortunately the objects seem to ignore collission and they cut each other in some frames. How can I avoid this?

Thanks in advance! :wavey:
Dreamwave
02-02-2003, 07:28 PM
have you already checked out the bloodcell tutorial?

this one (http://www.lightwave3d.com/tutorials/animation/blood-cells/index.html)
Tommi
02-02-2003, 07:42 PM
Yes of course :D
And nop, it doesn't tell me how to fix that. I'd also like to know a general solution for that...
Chagidiel
02-02-2003, 08:14 PM
You will have to specify the particle size. Check the "Show size"-button and adjust the particle size so that it is kind of the same as the bloodcells.

Then you will have to specify a type of self-interaction (interaction-tab). I suggest "bounce".

Then hit FX-Start, and a calculation will start. Now the particles will bounce off eachother.
Tommi
02-02-2003, 08:19 PM
Oh sigh... the only thing I forgot was setting the particle size. I even hit start and that took so long for calculation.
But now comes another question to my mind - those cells are flat, but particles are spheres, aren't they? wouldn't that cause some strange self interaction when two blood cells bounce from each other though they don't even touch each other?? :hmm:
Chagidiel
02-02-2003, 08:32 PM
ehh... they would hav to move really really slow and the camera would have to be very very close for anyone to notice that.
Tommi
02-02-2003, 08:38 PM
So it is - the camera is very close to the objects but I'm not sure whether they move slowly, because I didn't rendered an animation, yet... :shrug:
Chagidiel
02-02-2003, 09:33 PM
As I understand it, your bloodcels are polygonal objects?
If so, you wouldn´t have to render to see how well the collisions appear. OpenGL will show it fine.
Tommi
02-02-2003, 09:37 PM
Somehow thats a problem I don't know how to fix. Maybe you want to take a look at a frame I rendered. You can find it in the gallery forum. I made a tube (blood vessel) and the camera looks into it and from the camera's view in Open GL I don't see anything. Only from top and side view I can see the objects. Is this maybe related to the objects sizes? The camera is bigger than the tube... :shrug:
Chagidiel
02-02-2003, 10:41 PM
Decrease grid size until you see all you want to see :)
Tommi
02-02-2003, 10:44 PM
:surprised

really that simple??? Thanks! I'll go to bed and try it tomorrow.... yaaaawn..... where is the yawning smiley?
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