Re: [Openev-discuss] About to use gl instructions in a "c" program

[joluinfante <jol...@gm...>]

Thanks, David.
But, I can't to access to the address you tell me.
I did receive the message:
An error has been encountered in accessing this page. 

1. Server: openev.sourceforge.net
2. URL path: /app/developer_info/DEVCOURSE_tutorial2.htm
3. Error notes: File does not exist:
/home/groups/o/op/openev/htdocs/app/developer_info/DEVCOURSE_tutorial2.htm
4. Error type: 404
5. Request method: GET
6. Request query string: 
7. Time: 2007-07-23 05:12:38 PDT (1185192758)

Is ok the address?
TIA
jorge infante


Sampson, David wrote:
> 
> I had success by following the developers tutorial
> 
> http://openev.sourceforge.net/app/developer_info/DEVCOURSE_tutorial2.htm
> l
> 
> If you have not run through this before I suggest taking a look at it.
> 
> That's the extent to what I have to offer.
> 
> Cheers 
> 
> -----Original Message-----
> From: ope...@li...
> [mailto:ope...@li...] On Behalf Of
> joluinfante
> Sent: July 20, 2007 14:58
> To: ope...@li...
> Subject: [Openev-discuss] About to use gl instructions in a "c" program
> 
> 
> Hi, forum.
> I did modify the testmain.c (from openev project) to do a little
> georeferencing software.
> To complete it, I need draw a rectangle in the photo, to talk to the
> operator "what is the zone to process". But, I don't know what is the
> method to do it.
> I did try:
> 
>         gv_view_area_add_layer(GV_VIEW_AREA(view_raster), raster_layer);
> <--- this is my photo
>         raster_point_layer=gv_shapes_layer_new(NULL);
> 
> <--- this is a layer to put
>         gv_data_set_name(GV_DATA(raster_point_layer), "photo_points");
> 
> <--- the gcp points
>         gv_view_area_add_layer(GV_VIEW_AREA(view_raster),
> raster_point_layer);
>         gv_view_area_set_active_layer(GV_VIEW_AREA(view_raster),
> raster_point_layer); <-- the layer
>  
> 
> -- is active
>             glColor4f(1.0, 0.0, 0.0, 0.0); <--- I'll draw the rectangle
> with red color
>             glBegin(GL_LINES);             <--- I'll draw a lines to
> build
> the rectangle
>             glVertex3(0.0, 0.0, 0.0);
>             glVertex3(1000.0, 0.0, 0.0);
>             glVertex3(1000.0, 1000.0, 0.0);
>             glVertex3(0.0, 1000.0, 0.0);
>             glVertex3(0.0, .0, 0.0);
>             glEnd();                              <--- End of draw
>             glFlush();                            <--- Is it neccesary?
> 
> Then I don't see the rectangle in the view. 
> I see the sources, and this method is used to draw a rectangle around
> the cursor position.
> Can any help me?
> Thanks a lot.
> 
> jorge infante
> direccion de catastro
> municipalidad de rosario
> rosario - santa fe - argentina
>         printf("2\n");
> 
> 
> --
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> tf4118607.html#a11712874
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> 
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