File import and mathematics

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taejon - 22 May 2007 11:28 GMT

Hi

I am using Java1.4 and I develop on a mac 10.4 OS Tiger with Eclipse
3.1. I have an ascii-file with four column-values x y z rho. That
means coordinates x,y,z and the density. They are arranged in steps.
I want to import the file and to make the density in the x,y,z-space
visible in Java3D with canvas3d etc. Then I want to mark a part of the
density with the mouse and use the marked area for mathematical
operations (for example integration).
I have absolutely no idea how this can be performed, someone told me
something about voxels...

Is there any literature, source-code or anything availible ? Does
someone give me (in words) a principle idea how I have to tackle this
project ?

Thanks in advance

taejon

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~kurt - 23 May 2007 06:41 GMT

> Hi
>
[quoted text clipped - 3 lines]
> I want to import the file and to make the density in the x,y,z-space
> visible in Java3D with canvas3d etc. Then I want to mark a part of the

What do you mean by making the density visible? How do you plan on
displaying density? Color coding?

> density with the mouse and use the marked area for mathematical
> operations (for example integration).

In the sense that you would be able to compute mass, moments, etc...?

> I have absolutely no idea how this can be performed, someone told me
> something about voxels...

Huh, interesting. I would think the hardest part would be determining a
method for selecting (marking). Since there are finite elements, selecting
the elements should be possible. I would think making everything somewhat
transparent, and changing the color, transparency, or something, to show
it was selected would be the way to go. Here is a neat game that might
give you some ideas:

<http://www.nada.kth.se/~joh/minesweep3d/>

> Is there any literature, source-code or anything availible ? Does
> someone give me (in words) a principle idea how I have to tackle this
> project ?

I ran across a lot of stuff just googling for "java3d voxel"

- Kurt

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File import and mathematics

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