void  SetAxProjectParameters(float zoom,float aspect,float nearz,float farz,vect3d vEyePt,vect3d vLookatPt,vect3d vUpVec)

                Set the parallel projection parameters.

                zoom: zoom factor

                aspect: aspect ratio if screenn

                nearz: Z-value of the near view-plane.

                farz: Z-value of the far view-plane.

                vEyePt,vect3d,vUpVec: it will determine the view matrix.