Testing various patterns as height fields in SuperPatch I ran into this bug. For
certain
critical camera positions SuperPatch crashes with an illegal operation (invalid page
fault).  Change the camera position slightly or the position of the object and it runs
fine.  It's no real problem but I thought Ron might be interested :-)  (or not!)
David

// start of program
#include "colors.inc"
camera
{
  location  <0, 10, -10.0>
  direction 1.5*z
  right     4/3*x
  look_at   <0, 5,  0.0>
}

light_source
{
  <-60, 60, -30>
  color rgb 1
}

height_field { 
      pattern 200,200 { 
           hf_gray_16
           marble  scale 0.1 
           color_map { 
             [0 rgb 0] 
             [1 rgb 1] 
           } 
      }
   pigment{White}
   scale <10,1,10>
   translate z*11 
} 
// end of program

------------
dav### [at] cwcomnet
http://www.hamiltonite.mcmail.com
------------

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On Wed, 18 Aug 1999 22:52:17 GMT, dav### [at] cwcomnet (David
Wilkinson) wrote:

>Testing various patterns as height fields in SuperPatch I ran into this bug. For
certain
>critical camera positions SuperPatch crashes with an illegal operation (invalid page
>fault).  Change the camera position slightly or the position of the object and it
runs
>fine.  It's no real problem but I thought Ron might be interested :-)  (or not!)
>David

Actually, this is a bug in the official version too.  See
povray.bugreports for my description of what I found.  I 
don't have a solution for it yet.

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