NAME    [Toc]    [Back]

       glRect,  glRectd,  glRectf,  glRecti,  glRects,  glRectdv,
       glRectfv, glRectiv, glRectsv - draw a rectangle

SYNOPSIS    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

       Specify one vertex of a rectangle.  Specify  the  opposite
       vertex of the rectangle.

SYNOPSIS    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

       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 arrays, 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    [Toc]    [Back]

       GL_INVALID_OPERATION is generated if glRect() is  executed
       between  the  execution of glBegin() and the corresponding
       execution of glEnd().

SEE ALSO    [Toc]    [Back]

       glBegin(3), glVertex(3)



                                                       glRect(3G)