plot_object

'plot_object': draws a projection object (points, line, plane...)
-------------------------------------------------------------------
 function [ObjectData_out,hh]=plot_object(ObjectData,hplot,col)

OUTPUT
             hh: handles of the graphic object (core part)

INPUT:

 ObjectDataIn: structure representing the object properties:
        .Style : style of projection object
        .Coord: set of coordinates defining the object position;
        .ProjMode=type of projection ;
       .ProjAngle=angle of projection;
       .DX,.DY,.DZ=increments;
       .YMax,YMin: min and max Y
 ProjObject: projection object corresponding to the current plot (e. g. plane) 
 hplot: handle of the object plot to modify or if it is an axis, the axis
            where the object must be plotted, or if it is a figure the plotting figure 
 col: color of the plot, e;g; 'm', 'b' ..;