int PEXOrthoProjMatrix( double height, double aspect, double near, double far, PEXMatrix matrix_return )
Zero if successful; otherwise, one of the following:
Invoke PEXOrthoProjMatrix to create a view mapping matrix.
A projection matrix defines a visible region of the coordinate space. An orthographic projection defines the visible region as a box specified by its height, width (the height multiplied by the aspect), and its near and far boundaries.
The reference point for the projection is the origin of VRC; the near and far clipping planes are defined with respect to it. The height is defined in view reference coordinates. Clipping at the planes is controlled by the clipping flags in the selected view table entry.
None.
For a list of viewing transformation utilities, see Viewing Transformation Utilities. For a list of related topics, see PEXlib Utilities.