🚀 go-pugleaf

>        Open Phigs
>
>        Open Workstation (phigs_ws_type_x_drawable)
>
>        Set Workstation color model to RGB

The first three steps appear to be correct.

>        Allocate (using pset_colr_rep) all colors currently
>           residing in the X colormap
>
>        ....
>
>        Set polyline list colors with RGB values
>
>        Display the polyline

It's difficult to see what you're doing here. A correct example of how to
display a red polyline after the initial steps would be:

#define         WID     1
#define 	RED 	2
.
.
    Pcolr_rep rep;
    Ppoint_list3 list;
    Ppoint3 pts[2];

    rep.rgb.red = 1.0;
    rep.rgb.green = 0.0;
    rep.rgb.blue = 0.0;
    pset_colr_rep(WID, RED, &rep);
    pset_line_colr_ind(RED);
    list.num_points = 2;
    list.points = pts;
    pts[0].x = 0.0;
    pts[0].y = 0.0;
    pts[0].z = 1.0;
    pts[1].x = 1.0;
    pts[1].y = 0.0;
    pts[1].z = 0.0;
    ppolyline3(&list);
.
.

Hope this helps. In porting applications to various machine types and 
servers, I have noticed that some of the lower-end 8 bit displays do not
always display colors correctly, which I presume is due to the way color
is supported by the servers.

Tim
tpowell@convex.com