POV-Ray : Newsgroups : povray.general : Graphical projections : Re: Graphical projections Server Time: 20 Jun 2019 06:56:11 GMT
  Re: Graphical projections  
From: Mike Horvath
Date: 13 May 2019 08:37:08
On 5/12/2019 7:46 AM, Le_Forgeron wrote:
> Le 12/05/2019 à 03:20, Mike Horvath a écrit :
>> I've created some illustrations showing different graphical projections.
>>
>> https://commons.wikimedia.org/wiki/File:Graphical_projection_comparison.png
>>
>> I'm trying to figure out how to illustrate "cabinet projection" however.
>> The existing "cavalier projection" is nearly identical, except that
>> "cabinet projection" is half as long in the z direction. I could shrink
>> the model of the house along this axis, but I'd rather find a way that
>> only alters the camera statement. Any ideas?
>>
>> Here is the camera code I use for "cabinet projection":
>>
>>      #local cam_area = 2 * 5/4;
>>      #local cam_loca = vnormalize(-z/sind(045)+y-x) * cam_dist;
>>      #local cam_dirc = vnormalize(+z/sind(045)-y+x);
>>      #local cam_rgvc = +x * cam_area;
>>      #local cam_upvc = +y * cam_area;
>>      #local cam_tran = transform
>>      {
>>          translate +y * cam_move
>>      }
>>
>>      // requires the updated version of "screen.inc" available here:
>>      // http://news.povray.org/povray.text.scene-files/thread
>> /%3C581be4f1%241%40news.povray.org%3E/
>>      #include "screen.inc"
>>
>>      Set_Camera_Orthographic(true)
>>      Set_Camera_Transform(cam_tran)
>>      Set_Camera_Alt(cam_loca, cam_dirc, cam_rgvc, cam_upvc)
>>
>> Thanks!!
>>
>> Michael
> 
> Old, very old experiment, at http://jgrimbert.free.fr/pov/labo/
> 
> I did not test with latest povray.
> 


Very good, thank you.


Michael


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