Re: [brlcad-devel] #brlcad IRC availability times

[(Asad) S. A. H. <asa...@tu...>]

Hi, I think I understand the design now. We need a executable that is

exe = <g file bytes> + <code bytes>

The code is simply to find .g file bytes and then dpopen them


Current code need argv[1] i.e. viewer.exe moss.g. I’m working on changing it into argv[0] code.

I have another suggestion, how about we use “objcopy” tool instead of cat and convert the g file into an object file “.o”. Then during compilation we simply pass this object file to generate an executable:

gcc viewer.c moss.o
./viewer.exe
“print title”
From: Christopher Sean Morrison [mailto:br...@ma...]
Sent: 29 June 2016 00:56
To: BRL-CAD Developer Mailing List <brl...@li...>
Subject: Re: [brlcad-devel] #brlcad IRC availability times


Most that can help with libdm, librt are GMT-4.  Mailing list should work; was a message to the list missed?  The more specifically you can frame a question, the easier it will be to answer and provide some guidance.

Before involving libdm, you'll want to first get librt reading .g data that has been appended onto a binary application.  For that, it might make sense to first write a "compiler" program that concatenates a .g onto the end.  I.e.,

Program1 from a gviewer.c source you write:
gviewer.exe
# takes no arguments, fopens argv[0] and scans the file for a valid .g header.
# if it finds the header, just print out the title after a db_open()

Program2 from a gcompiler.c source you write:
gcompiler.exe -o moss.exe gviewer.exe moss.g
# fopens viewer.exe and moss.g, writes all the bytes to both to moss.exe

That's it.  If you have a non-Windows box handy, you can skip program2, skip writing gcompiler.c and just use the 'cat' program.  Then you just need to write gviewer.c, find the .g header bytes, then db_open it.

Cheers!
Sean


On Jun 28, 2016, at 04:13 PM, "(Asad) Syed, Asadullah Hussain" <asa...@tu...<mailto:asa...@tu...>> wrote:
Hi, I am a ESA Summer of Code student  (http://brlcad.org/wiki/Geometry_Viewer_Application_for_BRL-CAD) and completely new to brlcad source. I need some help especially with libdm, librt but unfortunately mailing list/irc communication is proving to be difficult. So I thought maybe it’s due to time zone difference (I am GMT+2).

Can anyone tell me the time period during which brlcad developers are online at IRC (#brlcad).


LG,

Technische Universität München
Syed Asadullah Hussain
MS Informatik


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