yade-dev team mailing list archive

[Chia Weng Boon <chiaweng@xxxxxxxxx>]

Hi Janek,
I submitted a Pull Request.  I fixed the display for the free fall examples
using Marching Cubes.  However, the orientation of the particles are not
completely correct yet in QT.  See for example the Wedge Example.
I think that was the reason why I moved to ParaView.

Boon

On Sat, Jan 26, 2019 at 11:19 PM Janek Kozicki <janek_listy@xxxxx> wrote:

> Hi Boon,
>
> thanks for you reply. Yes, I think that this marching cubes method
> can work really good. The only missing thing is to make the caching
> of calculated triangles correctly. Once the triangles for the shape
> are calculated you can use them all the time, unless the body deforms or
> is cut in half (I'm not sure if this can happen).
>
> A thing to discuss: you could store cached triangles not inside
> Gl1_PotentialParticle but inside PotentialParticle with Attr::hidden
> or (Attr::hidden|Attr::noSave). For example see into
> pkg/common/Cylinder.hpp as an example. In this way you will not need
> this loop in pkg/common/Gl1_PotentialParticle.cpp line 112, and
> automatically you have solved the problem what to draw when a body
> was deleted or added to scene. Because you only recalculate marching
> cubes for particular single body when you need to draw it and it
> wasn't generated yet.
>
> I hope that the post which I have just sent to mailing list about
> object oriented design deficiencies of your code wasn't too harsh.
> My apologies.
>
> best regards
> Janek
>
> Chia Weng Boon said:     (by the date of Sat, 26 Jan 2019 11:12:40 +0800)
>
> > Dear Janek,
> > I will look into it. Thanks. In the python script, the vtk files at
> > specific time intervals are output into the vtk folder.  I have been
> using
> > ParaView mainly for visualisation for both Potential Particles and
> > Potential Blocks.  The colour of the particles can also be changed in
> > ParaView.  I suspect that the Marching Cube display is not showing the
> > position and size of the particles correctly (I abandoned the marching
> > cubes quite long ago, but agree that real time display with simulation is
> > more user friendly)
> >
> > Let me check the example files again.
> >
> > Boon
>
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