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Stereo Parameters
A stereo image is generated by drawing two images from two
different perspectives, one from the left eye and one from the right.
The images are made by finding the view that would be seen by someone
located inside the scene. The method uses two parameters to find the
view; the eye separation and the
focal length. The first
defines the distance between the eyes and gives the parallax effect.
Setting the separation to 0 will result in a flat 2D image, while
setting it too large will give most people a headache.
The graphics model used by VMD assumes the eyes looking in front of
the viewer and focusing at the same point the focal length away. If
the focal length is 0, the viewer's eyes are crossed and looking at
each other. A larger focal length will often help in creating a
viewable image.
The two parameters can be changed with the text commands display focallength and display eyesep, or using the
Display form.
In general, try to make the eye separation as large as possible
without giving the viewer a migrane, and try to vary the focal length
to cut down on double images. It may often help to translate the
molecule forward or backward and also adjust the scaling, since there
is typically an optimum position for a molecule for a given set of
stereo parameters.
Next: Making Stereo Raster Images
Up: Stereoscopic Modes
Previous: Problems with stereo on
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