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Gilles Tran wrote:
>
>
> > I tried it. I'm not sure how high was my max_trace_level but space
> > between single copies was very dark. Maybe problem was I used for them
> > union and/or merge. I will try it and on Monday send to you result to
> > compare with MegaPov's picture. Thank you very much
>
> Here a small example (image below) :
>
> #global_settings{max_trace_level 41}
> background{rgb 1}
> light_source {-z*10000 1 rotate x*25 rotate y*30}
> #declare Propeller=sphere{0,0.5 translate y*0.5
> texture{
> pigment{
> gradient y
> poly_wave 0.5
> color_map{
> [0 rgbf <1,1,1,0.94>][0.95 rgbf <1,1,1,1>][1 rgbf <1,1,0.9,1>]
> }
> }
> finish{ambient 0 diffuse 0}
> }
> scale <0.5,5,0.1>
> rotate -y*15
> }
> #declare i=0;
> #declare nc = 20; // number of copies
> #declare maxr=30; // max angle of rotation
> union{
> #while (i<nc)
> object{Propeller rotate z*maxr*((i/nc))}
> object{Propeller rotate z*i*maxr/nc rotate z*120}
> object{Propeller rotate z*i*maxr/nc rotate z*240}
> #declare i=i+1;
> #end
> difference{
> sphere{0,1}
> plane{z,0 inverse}
> texture{
> pigment{spiral1 1 color_map{[0.3 rgb 1][0.3 rgb 0]} scale <1,1,0.8>}
> finish{ambient 0 diffuse 1}
> }
> scale <0.8,0.8,1.5>
> translate z*0.3
> }
> rotate y*45
> translate z*10
> }
>
> G.
> --
>
> **********************
> http://www.oyonale.com
> **********************
> - Graphic experiments
> - POV-Ray and Poser computer images
> - Posters
>
> [Image]
Hi all!
I tried to do it but I was not so succesfull. Please, see images with
notes bellow. But as I can see on Gilles Tran's picture it is with some
problems solveable. I have next fatal problem. By bump_mapping on mesh
(cylindrical and UV-mapping, too) is bump_mapped part of surface
"switched" from plus to minus. Where is problem? By bump_mapping on
cyllinder this problem is not visible
Regards
Jozef Gatial
P.S. Vought XF5U was modeled in program Rhinoceros and exported as .obj
files. Two or three parts are UV-mapped, for next parts with planar or
cyllindrical mapping I use my own program. These two problems are last
what I have to start real big jobs. For next pictures please visit my
page www.angelfire.com/sk/gatial
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Attachments:
Download 'megapovs_motionblur.jpg' (51 KB)
Download 'povrays_motionblur.jpg' (49 KB)
Download 'bumpmap-problem.jpg' (24 KB)
Preview of image 'megapovs_motionblur.jpg'
Preview of image 'povrays_motionblur.jpg'
Preview of image 'bumpmap-problem.jpg'
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> I tried to do it but I was not so succesfull. Please, see images with
> notes bellow.
About the first problem, it's clearly a max_trace_level problem. This could
explain the darkening on the propeller center too. In my little propeller
code, I chose the value as 2*number of copies + 1. It's going to be slower,
though. If you have some reflection on the propeller blade, turn it off.
The bump mapping problem looks like a bug but it needs further experimenting
to be sure.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
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