K3DSurf forum

jolkaP · Joined: 17 Oct 2011 Posts: 12 Location: Marseille (France)

Hello,

By default, MathMod allows going at maximum grid size 500 for Isosurfaces.

I need more for a specific project. I am trying to make a printable stl file for this surfaces.

(It comes from Herwig Hauser's gallery at http://imaginary.org)

When going up to 500 grid size, MathMod does not "view" the singular point (0,0,0). I would like to try with bigger sizes. I work on Mac but I am not used to this system, so please, answer with details.

JP[/img]

nextstep · Site Admin Joined: 06 Jan 2007 Posts: 539

Hi,
I'm not sure which version you're using under Mac since MathMod's Mac versions are outdated.
MathMod has no limit for the grid maximum and this can be modified via mathmodconfig.js file:

nextstep · Site Admin Joined: 06 Jan 2007 Posts: 539

A quick example that split your model into four parts.
It's already good for showing good details on screen but for an STL mesh, there still some work to do for "merging" the four generated mesh in a unique one...

jolkaP · Joined: 17 Oct 2011 Posts: 12 Location: Marseille (France)

Oh, thank you so much for the second solution. Even with the default maximum of 150 grid, it gives a nice rendering. Before your answer, the only way I had to work out through this kind of singular points which are not clearly computed was to pass through a parametrization. But for MIAU surface, it was difficult to find a nice parametrization.

(For the first solution, well, I have no idea how to use it because I don't know where this configuration file mathmodconfig.js is located on a mac).

nextstep · Site Admin Joined: 06 Jan 2007 Posts: 539

Hi,
I forget to mention that MathMod can generate the needed scripts to increase the resolution of your model. I'll show how to make the attached script render your model with better resolution at only a grid of 100, without having to write any new script:
1) render the last attached script with 4 components (Obj1, obj2, obj3 and obj4) with a lower resolution, say grid = 30
2) Make sure that "Obj1" is the selected component
3) go to ModelsDetails-->Grid-->"Multiplier(script generator)" and change:
X--> 3, Y --> 3 and Z --> 3
4) Click on the "Generate" button
Now, increase the grid resolution to 100 and recalculate your mathematical model. the resulting model should look better now at a grid of 100 than the original script at 150. This is because the component "Obj1" was split to 3*3*3=9 small components. This process can be repeated for any given component that doesn't render well on the screen. This way you can pinpoint exactly what region of your model need to be rendered with better resolution.
MathMod will generate config files in a directory that was given as a parameter, if no config file was found. It will also read and load config files found in the same directory given as a parameter:
The command line can be like this:
MathMod.exe /root/desktop/MathModDirectory/
Hope this can help!
_________________
Cheers,
Abderrahman

Furan · Posted: Thu Mar 12, 2015 5:30 am Post subject:

Hi,
I'm not sure if this is what you want, but try an odd number of grid samples for all x, y and z, so that one of the points is precisely at [0,0,0]. It needs a bit of computing, but you can even scale the limits and grid samples to hit two or more singularities at the same time.