[GRASS-dev] Re: North Arrow updates

[Hamish]

Hamish wrote:
> > > I also set the default arrow and text colors in
> > > panel_main.tcl to black (you might want to change these).
> 
> I changed the default text color to white as the two are drawn
> on top of each other. Note the text color is ignored. I will look
> into this next.

A bit stuck...

The north arrow "North" text uses basically the same method as the
panel_label.tcl text (which works), but "North" always comes out white.

If I add:
  gsd_colormode(CM_COLOR);
before the gl commands I get the color through, but then the 3D surface
goes all black. If after the gl calls I add:
  gsd_colormode(CM_AD);
it mostly gets back to normal, but looks a bit washed out.*

The 3D surface stays black if I do:
  gsd_colormode(CM_DIFFUSE);
instead of CM_AD.

(I don't know what the colormodes do, I'm just trying things here)


[*] bug #4238 ? I'm not sure if the bug is really in my video card driver,
as no one else has reported the same problem AFAIK.
  https://intevation.de/rt/webrt?serial_num=4238


here's some of the code:

=======================================

lib/ogsf/gsd_objs.c  gsd_north_arrow() :
    gsd_color_func(text_clr);
    txt = "North";
...
    glRasterPos3fv(base[0]);
    glListBase(fontbase);
    glCallLists(strlen(txt), GL_BYTE, (GLubyte *) txt);
    GS_done_draw();

    gsd_popmatrix();        
    gsd_flush();

=======================================

panel_label.tcl leads to:

lib/ogsf/gsd_label.c:
    /* Set text color */
    gsd_color_func(color);
    do_label_display(fontbase, labpt, text);


lib/ogsf/gsd_fonts.c
/*****************************************/
void do_label_display(GLuint fontbase, float *lab_pos, char *txt)
{
    glRasterPos2f(lab_pos[X], lab_pos[Y]);
    glListBase(fontbase);
    glCallLists(strlen(txt), GL_BYTE, (GLubyte *) txt);

    return;
}

=======================================


I don't see the difference. (beyond 2D/3D placement)


?
Hamish