Dear Gurus,
I am preparing a mathematical phantom of the human anatomy and my boss
wants to see transects, with the slices depicting the organs in the same
colours selected in the complete image.
How to do this ?
So far, I have written an instruction to intersect a plane of specified
thickness with the complete image and then rotate translate etc. to then
view it. However, the command to include the original colours remains
elusive.
Please reply and I'm sure a thousand blessings will bestow on thee.

Many thanks and hope to hear soon.

john storm
JOH### [at] hotmailcom

Post a reply to this message

Unfortunately the only way I know of at the moment is to intersect each
individually textured part with the same plane (or thin box) for each within
there respective statements, meaning all having an identical slicing object with
the same placement and orientation as all others and yet done in the base
object(s) where each texture is applied.
This way the texturing goes with the slicing object according to each part of
the CSG.  Not as simple as applying the slicing object to the whole CSG but it's
the only thing I can think of.

Bob

"Lance Storm" <lcs### [at] psychologyadelaideeduau> wrote in message
news:38D3336A.678C8856@psychology.adelaide.edu.au...
| Dear Gurus,
| I am preparing a mathematical phantom of the human anatomy and my boss
| wants to see transects, with the slices depicting the organs in the same
| colours selected in the complete image.
| How to do this ?
| So far, I have written an instruction to intersect a plane of specified
| thickness with the complete image and then rotate translate etc. to then
| view it. However, the command to include the original colours remains
| elusive.
| Please reply and I'm sure a thousand blessings will bestow on thee.
|
| Many thanks and hope to hear soon.
|
| john storm
| JOH### [at] hotmailcom
|
|

Post a reply to this message

Lance Storm wrote:
> 
> Dear Gurus,
> I am preparing a mathematical phantom of the human anatomy and my boss
> wants to see transects, with the slices depicting the organs in the same
> colours selected in the complete image.
> How to do this ?
> So far, I have written an instruction to intersect a plane of specified
> thickness with the complete image and then rotate translate etc. to then
> view it. However, the command to include the original colours remains
> elusive.
> Please reply and I'm sure a thousand blessings will bestow on thee.
> 
> Many thanks and hope to hear soon.

  If I understand your problem correctly I think the example below should
help. It simply applies a clear pigment to the intersecting plane so that
the original color is seen through it -

intersection {
               object { Your_Object }
                plane { z,0 pigment { rgbf 1 } }
             }


-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

Post a reply to this message

"Ken" <tyl### [at] pacbellnet> wrote in message
news:38D372C6.2EB1540C@pacbell.net...
|
| It simply applies a clear pigment to the intersecting plane so that
| the original color is seen through it -
|
| intersection {
|                object { Your_Object }
|                 plane { z,0 pigment { rgbf 1 } }
|              }

Nope.  That's okay if you have a thick slice and want to see the edges from an
angle for instance but that will only leave a hollow area inside of each object.
Filling each piece with media doesn't seem to work either.
I thought I had an example of a way to do this but if there is I can't find it.

Bob

Post a reply to this message

Bob Hughes wrote:

> Nope.  That's okay if you have a thick slice and want to see the edges from an
> angle for instance but that will only leave a hollow area inside of each object.
> Filling each piece with media doesn't seem to work either.
> I thought I had an example of a way to do this but if there is I can't find it.
> 
> Bob

You are of course correct. I should have caffeine in the morning before
posting !

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

Post a reply to this message

I've posted a simple test of CSG slices and it's individually textured parts at
the povray.text.scene-files group so that others may check this sort of thing
out for themselves.
It's a typical problem that's been heard many times before I'm sure.
What POV-Ray needs is a hierarchy of CSG texturing with which previous textures
can be kept even after another object is once again put into CSG with the first
CSG object without loss of the original texturing.  Something akin to
reset_children in MegaPov (well, vaguely like it anyway).
Best I could come up with in  POV-Ray 3.1g  was to use the CSG object on itself
in a way that makes the first textures stay simply because the thing is CSG'd
with itself instead of another differently (or altogether non-textured) object.

Bob

"Lance Storm" <lcs### [at] psychologyadelaideeduau> wrote in message
news:38D3336A.678C8856@psychology.adelaide.edu.au...
| Dear Gurus,
| I am preparing a mathematical phantom of the human anatomy and my boss
| wants to see transects, with the slices depicting the organs in the same
| colours selected in the complete image.
| How to do this ?
| So far, I have written an instruction to intersect a plane of specified
| thickness with the complete image and then rotate translate etc. to then
| view it. However, the command to include the original colours remains
| elusive.
| Please reply and I'm sure a thousand blessings will bestow on thee.
|
| Many thanks and hope to hear soon.
|
| john storm
| JOH### [at] hotmailcom
|
|

Post a reply to this message