glortho()函数:
参数 void glOrtho(GLdouble left,GLdouble right,GLdouble bottom,GLdouble top,GLdouble near,GLdouble far);void glOrtho(GLdouble
glortho()函数:
参数 void glOrtho(GLdouble left,GLdouble right,GLdouble bottom,GLdouble top,GLdouble near,GLdouble far);void glOrtho(GLdouble