NAME

window - define a perspective projection transformation

SYNOPSIS

C
window(left, right, bottom, top, near, far)
Coord left, right, bottom, top, near, far;

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

Pascal
procedure window(left, right, bottom, top, near, far: Coord);

DESCRIPTION

Window specifies the position and size of a rectangular viewing frustum in terms of the distance to the surface closest to the eye (in the near clipping plane), the boundaries of a rectangular region, and the distance to the far clipping plane.  The image will be projected with perspective onto the screen. 

Window loads a matrix onto the transformation stack, overwriting whatever was there. 

SEE ALSO

ortho, perspective

Version 2.3  —  July 04, 1985