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Isometric view

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2012-05-21
2013-04-22
  • Is it possible to render a model in isometric view ?
    "rt" command can only make perspective view ?

     
  • Sean Morrison
    Sean Morrison
    2012-05-21

    Actually, rt's default is isometric.  You have to specifically enable perspective (and can control the angle).  On the command line, the -p## option enables perspective.  Within MGED or Archer, perspective mode can be disabled on the menu or via "set perspective -1".

     
  • Another question. How can I know the ratio between the model real measurement and the pixel dimensions of the rt / rtedge isometric view ?
    I'd like to quote the isometric view.
    Thanks

     
  • Sean Morrison
    Sean Morrison
    2012-05-29

    At the beginning of every rt/rtedge rendering is a header of information displayed.  Included is all of the details on the view:

    $ rt -o/dev/null share/brlcad/7.21.0/db/moss.g all.g
    BRL-CAD Release 7.21.0  The BRL-CAD Raytracer RT
        Tue, 01 May 2012 10:13:30 -0700, Compilation 9
        sean@cad:/usr/brlcad/dev-7.21.0
    ……
    Tree: 6 solids in 6 regions
    Model: X(-50, 90), Y(-70, 70), Z(-24, 63)
    View: 35 azimuth, 25 elevation off of front view
    Orientation: 0.248097, 0.476591, 0.748097, 0.389435
    Eye_pos: 133.511, 79.4814, 84.117
    Size: 216.261mm
    Grid: (0.422386, 0.422386) mm, (512, 512) pixels
    Beam: radius=0.211193 mm, divergence=0 mm/1mm
    Output file is '/dev/null' 512x512 pixels

    For an isometric view, I have the dimensions of a single pixel (0.422386mm x 0.422386mm) and of the whole view (216.261mm x 216.261mm).

    Cheers!
    Sean