void GLAPIENTRY glRectd( GLdouble x1,
                                GLdouble y1,
                                GLdouble x2,
                                GLdouble y2 )
       void GLAPIENTRY glRectf( GLfloat x1,
                                GLfloat y1,
                                GLfloat x2,
                                GLfloat y2 )
       void GLAPIENTRY glRecti( GLint x1,
                                GLint y1,
                                GLint x2,
                                GLint y2 )
       void GLAPIENTRY glRects( GLshort x1,
                                GLshort y1,
                                GLshort x2,
                                GLshort y2 )

PARAMETERS
       x1, y1 Specify one vertex of a rectangle.

       x2, y2 Specify the opposite vertex of the rectangle.

C SPECIFICATION
       void GLAPIENTRY glRectdv( const GLdouble *v1,
                                 const GLdouble *v2 )
       void GLAPIENTRY glRectfv( const GLfloat *v1,
                                 const GLfloat *v2 )
       void GLAPIENTRY glRectiv( const GLint *v1,
                                 const GLint *v2 )
       void GLAPIENTRY glRectsv( const GLshort *v1,
                                 const GLshort *v2 )

PARAMETERS
       v1     Specifies a pointer to one vertex of a rectangle.

       v2     Specifies a pointer to the opposite vertex of the rectangle.

DESCRIPTION
       glRect supports efficient specification  of  rectangles  as  two  corner
       points.   Each  rectangle command takes four arguments, organized either
       as two consecutive pairs of (x,y) coordinates, or as two pointers to ar‐
       rays, each containing an (x,y) pair.  The resulting rectangle is defined
       in the z = 0 plane.

       glRect(x1, y1, x2, y2) is exactly equivalent to the following  sequence:
       glBegin(GL_POLYGON); glVertex2(x1, y1); glVertex2(x2, y1); glVertex2(x2,
       y2); glVertex2(x1, y2); glEnd(); Note that if the second vertex is above
       and  to the right of the first vertex, the rectangle is constructed with
       a counterclockwise winding.

ERRORS
       GL_INVALID_OPERATION is generated if glRect is executed between the exe‐