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A câmera objeto specifies the following properties of a camera:
while for an orthographic one it's simply:
This odd-seeming definition is (a) easy to calculate with and
(b) well-defined in both orthographic and perspective views.
     
(0,0,-1); it
is not resized, just painted behind everything else as is. See Image objetos.
   The syntax for a câmera is:
     <camera> ::=
     
        [ "camera" ]                 (optional keyword)
         [ "{" ]                    (opening brace, generally required)
             [ "define" <name> ]
     
             "<" <filename>
           |
             ":" <name>
           |
                                     (or any number of the following,
                                      in any order...)
     
             "perspective"  {"0" | "1"}            (default 1)
                                             (otherwise orthographic)
     
             "stereo"       {"0" | "1"}            (default 0)
                                             (otherwise mono)
     
             "worldtocam" <transform>        (see transform syntax above)
     
             "camtoworld" <transform>
                                     (no point in specifying both
                                      camtoworld and worldtocam; one is
                                      constrained to be the inverse of                                                the other)
     
             "halfyfield" <half-linear-Y-field-at-unit-distance>
                                     (default tan 40/2 degrees)
     
             "fov"           (angular field-of-view if perspective,
                              linear field-of-view otherwise.
                              Measured in whichever direction is smaller,
                              given the aspect ratio.  When aspect ratio
                              changes -- e.g. when a window is reshaped --
                              "fov" is preserved.)
     
             "frameaspect" <aspect-ratio>    (X/Y) (default 1.333)
     
             "near"  <near-clipping-distance>        (default 0.1)
     
             "far"   <far-clipping-distance>         (default 10.0)
     
             "focus" <focus-distance>                (default 3.0)
     
             "bgcolor" <float RGB(A) color>          (default 1/3 1/3 1/3 1)
     
             "bgimage" { <image specification> }     (default no background image)
     
          [ "}" ]                           (matching closebrace)
   
Next: camera-draw, Previous: bbox-draw, Up: GCL Reference
(camera CAM-ID [CAMERA])(new-camera ...).