Fast moving glass

Discussions about the use of Realflow 3
thewipe
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Joined: Tue Jan 30, 2007 6:52 am
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Fast moving glass

Postby thewipe » Fri Feb 02, 2007 10:42 am

I got this problem with my simulation on a fast moving glass,

particles tend to stay and left behind when my glass move fast ...is there a way that I can make them stay inside the glass . 2 or 3 frames my glass is empty though the glass is not that really fast .

please help! thanks


shaun_michael
Posts: 4766
Joined: Sun Sep 10, 2006 8:04 am

Fast moving glass

Postby shaun_michael » Fri Feb 02, 2007 11:02 am

Hi,

Hmmm, sounds like a geometry issue to me, but its difficult to say without looking at it. Any chance you can post a screen grab of your workspace at an offending frame?

Shaun

thewipe
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Joined: Tue Jan 30, 2007 6:52 am
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Fast moving glass

Postby thewipe » Fri Feb 02, 2007 11:29 am

Hi thanks shaun

here's the grab from realflow

I tried to play around with my frame per second and tried scale of the whole environment ,but no luck.


shaun_michael
Posts: 4766
Joined: Sun Sep 10, 2006 8:04 am

Fast moving glass

Postby shaun_michael » Fri Feb 02, 2007 11:46 am

To me it looks like particles are seeing the straw but not the glass.

Here's a couple of things to check:-

Make sure your normals are facing in the correct way for the glass
Ensure that your collision is set up correctly in the scene tree and that your fluid is seeing both your straw and your glass.

I haven't got RF3 in front of me at the moment, but that's where I'd start.

Shaun

thewipe
Posts: 7
Joined: Tue Jan 30, 2007 6:52 am
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Fast moving glass

Postby thewipe » Fri Feb 02, 2007 11:51 am

Hi Shaun ,

first 100 frames my particle drop to the glass so they stay inside the glass for few frames ...so I guess they have the right normals???? . I was thinking if there are any workaround to this problem .

thanks

thewipe

shaun_michael
Posts: 4766
Joined: Sun Sep 10, 2006 8:04 am

Fast moving glass

Postby shaun_michael » Fri Feb 02, 2007 12:02 pm

Oh right, I wasnt aware of that.

OK, more info needed. Can you post your scene tree, your object settings and your emitter settings as they relate to the object? In the meantime you could try upping your minimum substeps for the sim.

This seems like it should be easy to rectify, rather than have a workaround for (famous last words). Haven't used RF3 for some time, but it strikes me as more of a set-up issue than a RF3 issue.

Shaun

thewipe
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Joined: Tue Jan 30, 2007 6:52 am
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Fast moving glass

Postby thewipe » Fri Feb 02, 2007 12:57 pm

Thanks Shaun for your help .

what I did was to remodel the glass from a simple cube and it worked!! ...but you are right seems to be the model has some problem on the simulation , not sure what happen now its working .

thanks

thewipe

shaun_michael
Posts: 4766
Joined: Sun Sep 10, 2006 8:04 am

Fast moving glass

Postby shaun_michael » Fri Feb 02, 2007 1:08 pm

Glad it worked out ok. Would you be a little more specific about what you did to the glass, just so others can use the tip should they come across the same problem?

Shaun

thewipe
Posts: 7
Joined: Tue Jan 30, 2007 6:52 am
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Fast moving glass

Postby thewipe » Fri Feb 02, 2007 1:24 pm

The glass I was using was from a nurbs converted to poly ...but not the original model with more detail but still it wont work .

So the converted nurbs to poly ...I still tirangulate .

I actually do a test ...from a cube and seems working ...so what I did was to use the cube and just add more vertices to makeit round haha.

shaun_michael
Posts: 4766
Joined: Sun Sep 10, 2006 8:04 am

Fast moving glass

Postby shaun_michael » Fri Feb 02, 2007 1:42 pm

Good work. Thanks for taking the time to explain what you did.

Shaun


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