708 void QDoubleMatrix4x4::ortho(double left, double right, double bottom, double top, double nearPlane…  in ortho()  argument
711     if (left == right || bottom == top || nearPlane == farPlane)  in ortho()
717     double clip = farPlane - nearPlane;  in ortho()
730     m.m[3][2] = -(nearPlane + farPlane) / clip;  in ortho()
741 …4::frustum(double left, double right, double bottom, double top, double nearPlane, double farPlane)  in frustum()  argument
744     if (left == right || bottom == top || nearPlane == farPlane)  in frustum()
751     double clip = farPlane - nearPlane;  in frustum()
752     m.m[0][0] = 2.0 * nearPlane / width;  in frustum()
757     m.m[1][1] = 2.0 * nearPlane / invheight;  in frustum()
762     m.m[2][2] = -(nearPlane + farPlane) / clip;  in frustum()
763     m.m[3][2] = -2.0 * nearPlane * farPlane / clip;  in frustum()
774 void QDoubleMatrix4x4::perspective(double verticalAngle, double aspectRatio, double nearPlane, doub…  in perspective()  argument
777     if (nearPlane == farPlane || aspectRatio == 0.0)  in perspective()
787     double clip = farPlane - nearPlane;  in perspective()
798     m.m[2][2] = -(nearPlane + farPlane) / clip;  in perspective()
799     m.m[3][2] = -(2.0 * nearPlane * farPlane) / clip;  in perspective()
843 …iewport(double left, double bottom, double width, double height, double nearPlane, double farPlane)  in viewport()  argument
859     m.m[2][2] = (farPlane - nearPlane) / 2.0;  in viewport()
860     m.m[3][2] = (nearPlane + farPlane) / 2.0;  in viewport()