Bob Hughes heeft geschreven in bericht <36CC952C.90EB54DE@aol.com>...
>I see someone knows a bit of photography here.
>I hadn't tried the "shear" you mention (does that work? I'll find out),
>in fact I hadn't tried the offset parallel lens -- ie. create lens
>object and translate off center of the camera look_at -- kind of thing
>yet either. Will have to take a look and see how both these methods look
>in POV-Ray. Aside from doing decimal direction perspective before like
>John M. D., I haven't done too much camera play since most times I keep
>to a usual look in a scene anyhow.
>

An example of camera shearing for perpective correction. Put -uv in the
commandline when transforming the camera.

light_source {
  <500, 500,-500>
  color rgb <1, 1, 1>
}

#declare Shear= transform {
   matrix <  1,  0,  0,
                   0,  1,  0.3333,
                   0,  0,  1,
                   0,  0,  0 >
}

camera {
  location  <0.0, 0.01,-1.5>
  look_at   <0.0, 0.50, 0.0>
  angle 95
   //    transform Shear
}

plane

  y, 0
  texture {
    pigment {
        checker color rgb <1, 1, 1> color rgb <0, 0, 1>
        scale 0.25
    }
  }
}
box {
  <-0.5,0,-0.5>,<0.5,1,0.5>
  pigment {rgb 1}
}
box {
  <-0.5,0,-0.5>,<0.5,1,0.5>
  scale 0.5
  translate <0.75,0,-0.5>
  pigment {rgb 1}
}


--
Met dank aan de muze met het glazen oog.

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