 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Render of a skull using the slope pattern:
#declare XRayTexture = texture {
pigment {
slope{z}
pigment_map {
[0 color rgbt 2*<1,1,1,0.1>]
[0.75 color rgbt <0.1,0.6,2,1>]
[1 color rgbt <1,1,1,1>]
}
}
finish {ambient 1}
}
object{
skull26__null__
translate 0.1*x
texture {XRayTexture}
no_shadow
}
object{
skull26__null__
rotate -y*90
texture {XRayTexture}
no_shadow
}
Post a reply to this message
Attachments:
Download 'xraytest.jpg' (66 KB)
Preview of image 'xraytest.jpg'
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Chris B" <nom### [at] nomail com> wrote:
> Render of a skull using the slope pattern:
>
> #declare XRayTexture = texture {
> pigment {
> slope{z}
> pigment_map {
> [0 color rgbt 2*<1,1,1,0.1>]
> [0.75 color rgbt <0.1,0.6,2,1>]
> [1 color rgbt <1,1,1,1>]
> }
> }
> finish {ambient 1}
> }
>
> object{
> skull26__null__
> translate 0.1*x
> texture {XRayTexture}
> no_shadow
> }
>
> object{
> skull26__null__
> rotate -y*90
> texture {XRayTexture}
> no_shadow
> }
Very cool! Looks terrific.
I think I will try it with a more simple object first, since I always have
problems to imagine how this slope maps really work. There also was a slope map
x-ray version with MakeHuman, but I didn't succeed to apply it to another
object. But obviously this slope map pattern is very versatile if one knows, how
to handle it. Thanks for the nice code.
And thanks to all the other good suggestions! I might try them one after
another.
Regards,
Simone
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 10/13/2009 6:49 PM, Chris B wrote:
> Render of a skull using the slope pattern:
>
> #declare XRayTexture = texture {
> pigment {
> slope{z}
> pigment_map {
> [0 color rgbt 2*<1,1,1,0.1>]
> [0.75 color rgbt <0.1,0.6,2,1>]
> [1 color rgbt <1,1,1,1>]
> }
> }
> finish {ambient 1}
> }
> object{
> skull26__null__
> translate 0.1*x texture {XRayTexture}
> no_shadow
> }
>
> object{
> skull26__null__ rotate -y*90
> texture {XRayTexture}
> no_shadow
> }
Very nice! Is this MegaPOV only?
Mike
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
SharkD a écrit :
> On 10/13/2009 6:49 PM, Chris B wrote:
>> Render of a skull using the slope pattern:
>>
>> #declare XRayTexture = texture {
>> pigment {
>> slope{z}
>> pigment_map {
>> [0 color rgbt 2*<1,1,1,0.1>]
>> [0.75 color rgbt <0.1,0.6,2,1>]
>> [1 color rgbt <1,1,1,1>]
>> }
>> }
>> finish {ambient 1}
>> }
>> object{
>> skull26__null__
>> translate 0.1*x texture {XRayTexture}
>> no_shadow
>> }
>>
>> object{
>> skull26__null__ rotate -y*90
>> texture {XRayTexture}
>> no_shadow
>> }
>
> Very nice! Is this MegaPOV only?
>
> Mike
No!
The slope pattern is a POV-Ray native feature.
In the windows version's documentation, look at section 3.5.11.30 Slope
In some cases, it can looks somewhat like the aoi texture from mega-POV.
Alain
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"mone" <mon### [at] alienenterprisesde> wrote in message
news:web.4ad518671466e24f66e6d7c00@news.povray.org...
>
> I think I will try it with a more simple object first, since I always have
> problems to imagine how this slope maps really work. There also was a
> slope map
> x-ray version with MakeHuman, but I didn't succeed to apply it to another
> object. But obviously this slope map pattern is very versatile if one
> knows, how
> to handle it. Thanks for the nice code.
>
The main control on the slope pattern is a vector defining the orientation
of the pattern. I used 'slope{z}' in the example, along with a
pigment_map which tells it that, everything aligned precisely with the
z-axis is to be White with a tiny bit of transparency. It transitions to
have progressively more transparency and a Blue color for surfaces that are
not precisely aligned to the z-axis. It fades to completely transparent for
surfaces at right angles to the z-axis.
It can be tricky to keep the direction of the slope pattern aligned to the
camera. In the example, the second copy of the skull is rotated before
applying the slope pattern (so that the slope pattern isn't rotated). As Sam
mentioned it works best with an Orthographic camera, which makes it possible
to keep the pattern aligned to the camera direction throughout the whole
image. If you declare variables 'MyLocation' and 'MyLook_At' for the camera,
then you can simply use slope{MyLook_At-MyLocation} to keep the pattern
oriented towards the camera as you move the camera around (remembering not
to rotate objects after applying the texture/pattern).
One word of warning. This is one of the few instances where working with too
simple an object could actually be a little confusing, because you need some
subtle surface changes on the object to be able to appreciate what's going
on.
Regards,
Chris B.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Excelllent! Somebody had to think of this. :-)
Thomas
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Very nice effect!
I'll give it a try.
;-)
Paolo
>Chris B on date 14/10/2009 00:49 wrote:
> Render of a skull using the slope pattern:
>
> #declare XRayTexture = texture {
> pigment {
> slope{z}
> pigment_map {
> [0 color rgbt 2*<1,1,1,0.1>]
> [0.75 color rgbt <0.1,0.6,2,1>]
> [1 color rgbt <1,1,1,1>]
> }
> }
> finish {ambient 1}
> }
> object{
> skull26__null__
> translate 0.1*x texture {XRayTexture}
> no_shadow
> }
>
> object{
> skull26__null__ rotate -y*90
> texture {XRayTexture}
> no_shadow
> }
>
> ------------------------------------------------------------------------
>
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Chris B" <nom### [at] nomailcom> wrote:
> "mone" <mon### [at] alienenterprisesde> wrote in message
> news:web.4ad518671466e24f66e6d7c00@news.povray.org...
> The main control on the slope pattern is a vector defining the orientation
> of the pattern. I used 'slope{z}' in the example, along with a
> pigment_map which tells it that, everything aligned precisely with the
> z-axis is to be White with a tiny bit of transparency. It transitions to
> have progressively more transparency and a Blue color for surfaces that are
> not precisely aligned to the z-axis. It fades to completely transparent for
> surfaces at right angles to the z-axis.
That does sound logical. However I wonder how you have figured out the correct
values, so it does look so good :).
>If you declare variables 'MyLocation' and 'MyLook_At' for the camera,
> then you can simply use slope{MyLook_At-MyLocation} to keep the pattern
> oriented towards the camera as you move the camera around (remembering not
> to rotate objects after applying the texture/pattern).
Yes. Thank you for the information, it was very helpful. I think the reason
because it didn't work at first was because I use to put the camera in the -z
direction. And than when the slope pigment is in the +z-direction everything is
much too bright and does not look like an x-ray texture at all. But when putting
"-z" behind slope everything looks fine. Likewise, when the camera is sitting in
the -z direction it seems to work whith MyLocation-MyLook_At instead
MyLook_At-MyLocation.
I've tried both, with the slope pigment texture you suggested (I think I've
added a bit more ambient) and aoi, it looks both quite Ok, I think (see image
below), only with aoi it started to look strange when I tried to make it more
transparent. I think it does work too, though, if people know how to use it
correctly, only I couldn't figure it out any better with my usual
trial-error-approach. :)
Best Regards,
Simone
//////////////////////////////////////
#version unofficial megapov 1.1;
#include "Brain_POV_geom.inc" //Geometry
#declare cam_location= <0.0, 0.0, -18.0> ;
#declare cam_look_at= <0.0, 0.0, 0> ;
camera {
location cam_location angle 30
look_at cam_look_at
right x*image_width/image_height
}
#declare XRayTexture2 = texture {
pigment {
slope{cam_location-cam_look_at}
pigment_map {
[0 color rgbt 2*<1,1,1,0.1>]
[0.75 color rgbt <0.1,0.6,2,1>*1]
[1 color rgbt <1,1,1,1>]
}
}
finish {ambient 3}
}
#declare Brain_ = object {
object { Brain_ Center_Trans (Brain_ , x+y+z)}
} ;
object{
Brain_
scale <.6,.6,.6>
rotate <0,180,0>
translate <-2,0,0>
texture {XRayTexture2 }
}
object{
Brain_
scale <.6,.6,.6>
rotate <0,180,0>
translate <2,0,0>
texture {
pigment {
aoi
color_map {[0 rgb 0]
[.5 rgbt <0.3, 0.35, 1,.5>*1]
[1 rgbt <1, 1, 1,1>*1]
}
}
finish { ambient 4 diffuse 0}
}
}
////////////////////////////////////
Post a reply to this message
Attachments:
Download 'x_ray_test.jpg' (79 KB)
Preview of image 'x_ray_test.jpg'
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"mone" <mon### [at] alienenterprisesde> wrote in message
news:web.4ad90cfb1466e24f18ebfdf70@news.povray.org...
> "Chris B" <nom### [at] nomailcom> wrote:
>
>> ..... It transitions to have progressively more transparency and a Blue
>> color for surfaces that are ...
>
> That does sound logical. However I wonder how you have figured out the
> correct
> values...
Just trial and error I'm afraid, so no secret tricks to share :o)
> ... I think the reason it didn't work at first was because I use to put
> the camera
> in the -z direction.
Ah yes! I usually do the same, but the skull model I'm doing is facing the
other way to be consistent with some stuff other people are developing.
I think both your images look very good. I suspect the variation with real
x-Ray photography can be quite large depending upon what the radiologist is
trying to highlight.
Regards,
Chris B.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Chris B" <nom### [at] nomailcom> wrote:
> "mone" <mon### [at] alienenterprisesde> wrote in message
> news:web.4ad90cfb1466e24f18ebfdf70@news.povray.org...
> > "Chris B" <nom### [at] nomailcom> wrote:
> >
> >> ..... It transitions to have progressively more transparency and a Blue
> >> color for surfaces that are ...
> >
> > That does sound logical. However I wonder how you have figured out the
> > correct
> > values...
>
> Just trial and error I'm afraid, so no secret tricks to share :o)
Oh, OK, so I'm not the only one :))
> I think both your images look very good.
Thanks :)). Though they aren't exactly much of my images because the effect on
the left was suggested by you and the model is a ready-made one.
> I suspect the variation with real
> x-Ray photography can be quite large depending upon what the radiologist is
> trying to highlight.
Yes, it's not too realistic for sure, but I don't care much because I was just
after a fancy looking effect, more or less. I think I will try to make a
composition with the brain and the head of the MakeHuman model - wont't work
with POV alone, because there's too much strange looking stuff inside the
MakeHuman model, which becomes visible when transparent, and csg doesn't seem to
work properly with this mesh. So I'll have too do it in post processing, but in
the end it will work somehow, I hope.
Best Regards,
Simone
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
|
|
