Hi! me again. played around with the paraboloids a little. I can't seem
to bound them, why?
take a look at this pov file.


// Persistence of Vision Ray Tracer Scene Description File
// File: ?.pov
// Vers: 3
// Desc: Checkered Floor Example (I use this example as a start for the
#includes, settings, and camera)
// Date: mm/dd/yy
// Auth: ?
//

#version 3

#include "colors.inc"
#include "shapes.inc"
global_settings
{
  assumed_gamma 1.0
}

// ----------------------------------------
camera
{
  location  <0.0, 10.5, 0.0>
  direction 1.5*z
  right     4/3*x
  look_at   <0.0, 0.0,  0.0>
}

sky_sphere
{
  pigment
  {
    gradient y
    color_map { [0.0 color blue 0.6] [1.0 color rgb 1] }
  }
}

light_source
{
  0*x // light's position (translated below)
  color red 1.0  green 1.0  blue 1.0  // light's color
  translate <-30, 30, -30>
}

// ----------------------------------------
plane
{
  y, -1
  texture
  {
    pigment {checker color rgb 1 color blue 1 scale 0.5}
    finish {reflection 0.2}
  }
}

object
{Paraboloid_Y
  rotate <90,180,0>
  scale <1,1,1>
  translate <0,-1,0>
  bounded_by{box
    {
      <-3,0.5,  0>  // one corner position <X1 Y1 Z1>
      < 0,  0, -10>  // other corner position <X2 Y2 Z2>
    }
}
  pigment {color green 1}
}

box
    {
      <-3,0.5,  0>  // one corner position <X1 Y1 Z1>
      < 0,  0, -10>  // other corner position <X2 Y2 Z2>
    }

^^ this box shows the region in the paraboloid to be bounded

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Eitan Tal wrote:
> 
> Hi! me again. played around with the paraboloids a little. I can't seem
> to bound them, why?

Because Bounded_by is an old optimisation (which is usually removed by
 the automatic bounding of pov unless you ask to keep it).

What you want is clipped_by !

Same old story, ever...

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