Here's something simple:
For each plane,
- determine a non-self-intersecting closed path of largest
area that is the boundary between the inner and outer
regions of the body;
- find the center of the path (e.g. center of mass) and
place N points on the path where equiangular rays
from center intersect with it.*
Build OpenGL GL_QUAD_STRIP between each adjacent pairs
of planes matching their 0..N points.
______
* This requires one intersection per ray.
Alternatively, without finding the center, break the
path into N equidistant segments, starting from e.g. (0,max{y}).
--- Bj�rn Helgason <[EMAIL PROTECTED]> wrote:
> I have been working with images in a plane x and y coordinates.
> Thanks to members of this forum I have successfully been able to locate
> objects in that plane and do calculations related to it.
>
> Now I am interested in looking in the z direction.
>
> I have as an example 300 images which are slices through a head from a CT.
> Each slice is a x,y plane and there are objects to be investigated in each
> plane like a slice through the brain.
>
> The same object can then exist in several slices with variations.
> Each slice is interesting but it would be even more interesting to be able
> to put the x,y planes together and be able to look in the z direction and
> also be able to rotate the 3D object.
>
> Then make slices through the cube from various angles.
>
> Is there a tool available in J to do this already?
>
> I have seen various 3D demos but I am not sure if they have been using
> something like 300 BMP files for input.
>
> I do have a Dicom viewer that can look at the images in the way I am
> describing here above and there are a number of tools available to do parts
> of what I want.
> They are all lacking what I have in J in the form of giving a programming
> access to the information I am looking at to combine it with other things of
> interest.
>
>
>
> --
> Bj�rn Helgason, Verkfr��ingur
> Fugl&Fiskur ehf, �erneyjarsund 23, Box 127
> 801 Gr�msnes ,t-p�st: [EMAIL PROTECTED]
> Skype: gosiminn, gsm: +3546985532
> Landslags og skr��gar�ager�, gr�fu�j�nusta
> http://groups.google.com/group/J-Programming
>
>
> T�knikunn�tta h�ndlar hi� fl�kna, sk�punarg�fa er meistari
> einfaldleikans
>
> g��ur kennari getur stigi� � t�r �n �ess a� glansinn fari af
> sk�num
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