Can you help me, please. How to do motion_blur in PovRay 3.5 fot these
propellers. With "transmit all" I was not very succesfull
Thanks
Jozef Gatial

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Attachments:
Download 'xf5u-povray35.jpg' (115 KB)

Preview of image 'xf5u-povray35.jpg'

3BE### [at] contalsk...

> Can you help me, please. How to do motion_blur in PovRay 3.5 fot these
> propellers. With "transmit all" I was not very succesfull

One way would be to make multiple, rotated copies of the propeller with a
transparent texture and a high enough max_trace_level.
#declare i=0;
#declare nc = 20; // number of copies
#declare maxr=15; // max angle of rotation
#while (i<nc)
    // propeller centered in <0,0,..> and oriented along z
    object{Propeller rotate z*i*maxr/nc}
    #declare i=i+1;
#end

G.
--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
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Gilles Tran <tra### [at] inapginrafr> wrote:
: One way would be to make multiple, rotated copies of the propeller with a
: transparent texture and a high enough max_trace_level.

  The problem with that is that then you'll see inside the propeller.

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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Gilles Tran wrote:
> 

> 3BE### [at] contalsk...
> 
> > Can you help me, please. How to do motion_blur in PovRay 3.5 fot these
> > propellers. With "transmit all" I was not very succesfull
> 
> One way would be to make multiple, rotated copies of the propeller with a
> transparent texture and a high enough max_trace_level.
> #declare i=0;
> #declare nc = 20; // number of copies
> #declare maxr=15; // max angle of rotation
> #while (i<nc)
>     // propeller centered in <0,0,..> and oriented along z
>     object{Propeller rotate z*i*maxr/nc}
>     #declare i=i+1;
> #end
> 
> G.
> --
> 

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
Jozef Gatial

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"Jozef Gatial" <gat### [at] contalsk> wrote in message
news:3BE2B750.A1E4AE80@contal.sk...
> Gilles Tran wrote:
> >

> > 3BE### [at] contalsk...
> >
> > > Can you help me, please. How to do motion_blur in PovRay 3.5 fot these
> > > propellers. With "transmit all" I was not very succesfull
> >
> > One way would be to make multiple, rotated copies of the propeller with a
> > transparent texture and a high enough max_trace_level.
> > #declare i=0;
> > #declare nc = 20; // number of copies
> > #declare maxr=15; // max angle of rotation
> > #while (i<nc)
> >     // propeller centered in <0,0,..> and oriented along z
> >     object{Propeller rotate z*i*maxr/nc}
> >     #declare i=i+1;
> > #end
> >
> > G.
> > --
> >
>
> 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
> Jozef Gatial

I would use something like a media filled sphere-sweep with a stretched out
sphere the same size as a prop.

- Nekar


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thats a great model. did you create it.. if so in what?
-darrell

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Warp wrote:
> 
> Gilles Tran <tra### [at] inapginrafr> wrote:
> : One way would be to make multiple, rotated copies of the propeller with a
> : transparent texture and a high enough max_trace_level.
> 
>   The problem with that is that then you'll see inside the propeller.

Could you use a completely clear interior_texture, perhaps?

Just a thought ...
	Mike Andrews.

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> 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

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Attachments:
Download 'propeller.jpg' (4 KB)

Preview of image 'propeller.jpg'

Shouldn't that union be a merge? In a *real* motion blur, you wouldn't see
much of the object surfaces anyway..

--

//Mahalis
camera{location<0,0.25,-2> look_at 0.5*y} #declare T=texture{pigment{crackle
scale 0.5 rotate 90 turbulence 0.75 color_map{[0 rgb 1][0.05 rgb 1][0.1
rgb<1,0.25,1>][0.25 rgbf 1][1 rgbf 1]}} finish{ambient 1}} #declare
c=difference{torus{0.5,0.1 rotate -90*x}box{<0.7,0,0.2>,<-0.7,-0.7,-0.2>}}
merge{object{c translate<0.5,0.5,0>} object{c translate<-0.5,0.5,0>}
cylinder{<1,0.5,0>,<1,0,0>,0.1} cylinder{<-1,0.5,0>,<-1,0,0>,0.1}
cylinder{0.5*y,0,0.1} texture{T}}
--


"Gilles Tran" <tra### [at] inapginrafr> wrote in message
news:3be30258$1@news.povray.org...

>
> > 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
>
>
>
>
>

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Jozef Gatial scribis news:3BE### [at] contalsk:

> Can you help me, please. How to do motion_blur in PovRay 3.5 fot these
> propellers. With "transmit all" I was not very succesfull
> Thanks
> Jozef Gatial
> --------------C283478265B164EFBEC96AF6
>  
> Attachment saved: C:\MY DOWNLOADS\XNEWS\attachments\XF5U-PovRay35.jpg
> --------------C283478265B164EFBEC96AF6--
Hay, a flying pancake. Once tried to make a wood model ot this thing.
Never finished it. But what you have here is very impressive. When you have
the motioin blur worked out is will be excelant.

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