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Foil 49 VRML1.0 PerspectiveCamera Node - I

From Overview of VRML 1.0 Language with Examples CPS616 Basic Information Track for Computational Science -- Winter-Spring Semester 96 and 97. by Geoffrey C. Fox, Alvin Leung, Meryem Ispirli * See also color IMAGE
A perspective camera defines a perspective projection from a viewpoint.
The viewing volume for a perspective camera is a truncated right pyramid.
By default, the camera is located at (0,0,1) and looks along the negative z-axis;
The position and orientation fields can be used to change these values.
The heightAngle field defines the total vertical angle of the viewing volume.
An OrthographicCamera is similar but does not use perspective (decreasing size with distance from viewpoint)

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