POV-Ray : Newsgroups : povray.general : MegaPov 1.1 MechSim help request Server Time
31 Oct 2024 19:30:28 EDT (-0400)
  MegaPov 1.1 MechSim help request (Message 1 to 3 of 3)  
From: Tim McMurdo
Subject: MegaPov 1.1 MechSim help request
Date: 7 Jun 2005 08:45:00
Message: <web.42a5965af7e4acf4acb32c570@news.povray.org>
I am attempting to have a sail interact with a rope that is in front of it.
When the sail billows out, I want it to press against the rope and billow
around it. I have tried several sets of settings to no avail. The sail just
billows through the rope and does not form around it.

The sail is created with MechSim and is a 50x50 mesh. The rope is an Iso CSG
cylinder.

1. Could the spacing on the masses in the mesh affect this? If the spacing
on the masses prevents a sail mass from colliding with the rope?

2. What collision settings and methods should I be using to cause the mesh
sail to collide with the cylinder (rope)?

3. Would I be better off creating the rope with masses and connections? The
current rope is very taunt, but I will be using loose ropes int he future.

4. Should the sail and each rope be placed in its own group?

I am just looking for some general guide lines. I will do the work if
somebody can point me in the right direction. If somebody could give me a
hint, I would really appreciate the help.

Thanks,

Tim


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From: Christoph Hormann
Subject: Re: MegaPov 1.1 MechSim help request
Date: 7 Jun 2005 09:50:01
Message: <d848lk$8so$1@chho.imagico.de>
Tim McMurdo wrote:
> I am attempting to have a sail interact with a rope that is in front of it.
> When the sail billows out, I want it to press against the rope and billow
> around it. I have tried several sets of settings to no avail. The sail just
> billows through the rope and does not form around it.

First: wrong group, followup set.

> The sail is created with MechSim and is a 50x50 mesh. The rope is an Iso CSG
> cylinder.
> 
> 1. Could the spacing on the masses in the mesh affect this? If the spacing
> on the masses prevents a sail mass from colliding with the rope?

Partly - only the masses are checked for collision with the environment 
so the 'rope' has to be considerably thicker than the distance between 
the masses in the sail.

> 3. Would I be better off creating the rope with masses and connections?

Probably, having the rope as a 'line' and the sail as a 'patch' will 
make them interact correctly if you turn on mass-face-collisions.

> 4. Should the sail and each rope be placed in its own group?

This would make collision tests much faster.

Christoph

-- 
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From: Tim McMurdo
Subject: Re: MegaPov 1.1 MechSim help request
Date: 8 Jun 2005 13:45:00
Message: <web.42a72dff7fcb28eb6e93bf990@news.povray.org>
Thank you Christoph, I will start work on this again this weekend.

Tim


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