Michael Frumin wrote:
I am attempting to capture 3D geometries from OpenGL applications for
re-use in an art and animation context, and am wondering if Mesa could
be a useful tool for this.
I have been developing and testing a "DLL Proxy" on MS windows that
captures, and forwards OpenGL calls from the application to the system's
OpenGL32 library, and outputs 3D object files on the side, representing
a single frame of rendering. This has worked well, until I encountered
applications that use Shader/Vertex Programs to actually do the
modelview transformations on vertices.
So, I guess I have two questions about mesa:
1) Would the Mesa code for compiling/interpreting/evaluating vertex
programs against a set of vertices be easily re-usable by my DLL proxy?
2) If I were to scrap the DLL Proxy approach and just hack Mesa, is
there a single place in Mesa that I could add some code to output all
the 3D vertices/faces after all modelview and vertex program
transformations, but before schmeared into the 2D raster?
Have you looked at OpenGL's feedback feature? It lets you capture
OpenGL geometry after it's been transformed to screen space, before
rasterization.
Assumption for Q2: Mesa should be able to handle all the OpenGL calls
for OpenGL-using apps on windows, right? I couldn't test it because
when trying to compile with MSVC6.0 I get the following errors:
C:\Documents and
Settings\...\Mesa-6.4.1\src\mesa\swrast\s_tritemp.h(1159) : error C2275:
'GLuint' : illegal use of this type as an expression
../../../../include\GL/gl.h(155) : see declaration of 'GLuint'
Fixed in CVS, I believe. If you go to the website and browse CVS, you
can grab the latest version of the file.
-Brian
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
Mesa3d-dev mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
