window(3G)

NAME
     window - defines a perspective projection transformation

FORTRAN 77 SPECIFICATION
     subroutine window(left, right, bottom, top, near, far)
     real left, right, bottom, top, near, far

PARAMETERS
     left     expects x coordinate of left side of viewing volume.

     right    expects x coordinate of right side of viewing volume.

     bottom   expects y coordinate of bottom of viewing volume.

     top      expects y coordinate of top of viewing volume.

     -near    expects the z coordinate of the near clipping plane.

     -far     expects the z coordinate of the far clipping plane.

DESCRIPTION
     window specifies the position and size of the rectangular viewing frustum
     closest to the eye (in the near clipping plane), and the location of the
     far clipping plane.  All objects contained within this volume are
     projected in perspective onto the screen area that viewpo defines.

     When the system is in single matrix mode, window loads a matrix onto the
     transformation stack, replacing the current top matrix.  When the system
     is in viewing, projection, or texture matrix mode, window replaces the
     current Projection matrix and leaves the ModelView matrix stack and the
     Texture matrix unchanged.

SEE ALSO
     mmode, ortho, perspe, viewpo