Function: PGBEAM Purpose: Draw elliptical shaded beam (PGPLOT) Category: PLOTTING File: pgbeam.c Author: M. Vogelaar Use: CALL PGBEAM( XCENTRE, Input real YCENTRE, Input real MAJOR, Input real MINOR, Input real PA, Input real DELTA, Input real SLOPE Input real SHAPE ) Input integer XCENTRE X position of centre of ellipse in world coordinates. YCENTRE Same for Y position MAJOR Major axis of ellipse MINOR Minor axis of ellipse PA Position angle of ellipse wrt. pos x-axis in degrees. DELTA Separation shading lines in world coordinates. SLOPE Slope of shading lines in degrees. SHAPE 1: Plot shaded ellipse 2: Plot shaded rectangle (e.g.IRAS beam) 3: Plot cross Description: Draw an elliptical beam with specifications (origin and axes) in world coordinates. The position angle of the major axis is wrt. the pos. x-axis. The ellipse is rotated counter-clockwise. If user wants shading (line pattern only) you can give the slope of the lines in 'SLOPE' and the distance between the lines in world coordinates 'DELTA' in the y-direction in an unrotated frame. However, lines are plotted in the rotated frame. Updates: Dec 9, 1991: MV, Document created Sep 19, 1994: MV, Rectangular beam implemented Jul 7, 1997: MV, Cross implemented