rodpacker
09-22-2009, 09:12 PM
Hi guys,
I'm needing to fill a logo with liquid and choose particle fluids as they seem to give me the nicest splashes. As it is a logo it needs to be represented possibly accurate.
Luckily on this one I should get away with a fairly low-res particle count. I am having two problems with this:
1. if I use a fairly low particle separation of e.g. 0.25 the particle fluid seems to be blocked from falling down through my e.g. "S" (see attachment) as if the staticRBD collision wasn't set up right. However looking at it (by displaying) it shows the collision geo just fine. Also if I use a higher particle res e.g. particle separation of 0.1 the flow is just fine.
Can anybody tell me what that is and how to fix it? Or do I just have to use the higher particle res?
2. as shown in image below, the particles don't seem to be colliding right on the border of the collision geometry rather then having something like a buffer zone (marked bright green in a few areas in the screenshot) I have looked into various options to fix this and came up with:
- the VOLUME OFFSET under the collisions TAB of the particleFluid-DOP, but I cannot seem to b able to set a negative value in order to get it closer to the actual RBD geo borders
- the OFFSET SURFACE setting in the collision->volume tab of the static RBD I am using, but looking at the font and the fact that then the letters would cut into each other doesn't make me think that's the way to go either
As a backup I guess I could use the ISO-offset-as-removal-object as mentioned in one of the intro to fluid dynamics videos, but I'd be happier without it.
Is there a "reduce collision distance" - slider somewhere I haven't found? Or what other ways can be used to do this?
cheers for ur help
rodpacker
http://forums.odforce.net/index.php?app=core&module=attach§ion=attach&attach_rel_module=post&attach_id=7979
I'm needing to fill a logo with liquid and choose particle fluids as they seem to give me the nicest splashes. As it is a logo it needs to be represented possibly accurate.
Luckily on this one I should get away with a fairly low-res particle count. I am having two problems with this:
1. if I use a fairly low particle separation of e.g. 0.25 the particle fluid seems to be blocked from falling down through my e.g. "S" (see attachment) as if the staticRBD collision wasn't set up right. However looking at it (by displaying) it shows the collision geo just fine. Also if I use a higher particle res e.g. particle separation of 0.1 the flow is just fine.
Can anybody tell me what that is and how to fix it? Or do I just have to use the higher particle res?
2. as shown in image below, the particles don't seem to be colliding right on the border of the collision geometry rather then having something like a buffer zone (marked bright green in a few areas in the screenshot) I have looked into various options to fix this and came up with:
- the VOLUME OFFSET under the collisions TAB of the particleFluid-DOP, but I cannot seem to b able to set a negative value in order to get it closer to the actual RBD geo borders
- the OFFSET SURFACE setting in the collision->volume tab of the static RBD I am using, but looking at the font and the fact that then the letters would cut into each other doesn't make me think that's the way to go either
As a backup I guess I could use the ISO-offset-as-removal-object as mentioned in one of the intro to fluid dynamics videos, but I'd be happier without it.
Is there a "reduce collision distance" - slider somewhere I haven't found? Or what other ways can be used to do this?
cheers for ur help
rodpacker
http://forums.odforce.net/index.php?app=core&module=attach§ion=attach&attach_rel_module=post&attach_id=7979