Hi Stuart,
First of all: Thank you for giving something back to the community.
Can you elaborate on the specific versions used for the 3rd-party
libraries? Especially if you compiled against Qt and possibly which version.
Hello dear OSG-community,
OSG 3.4.0 Windows binaries built with Visual C++ 2015 and Intel C++ 2016 are
now available from this page on my company's site:
http://objexx.com/OpenSceneGraph.html
A ReadMe.txt file in the root directory of the expanded package has some
details.
These are 64-bit builds with the default GL2 OpenGL level and these
dependencies: curl, freetype, giflib, glut, jpeg, lpng, minizip, tiff, zlib. We
can add other plugins (GDAL, Collada, ...) based on community interest.
There is a vanilla VC++ build and also builds optimized for AVX2 (Haswell and
later) CPUs. We are going to do some performance comparisons to see if the AVX2
and/or Intel C++ are beneficial for our application: we also welcome feedback
on performance from the community.
The Intel C++ build should be binary compatible with VC++ 2015 so you don't
need Intel C++ to use it. Note that it was built with /fp:fast=2 to enable
auto-vectorization of floating point loops: this could cause small precision
loss that might matter with larger/geo distance scales. If vectorization isn't
significant/beneficial this option may be dropped: input on this is welcomed.
Interesting, can you point to some sources why the /fp:fast is needed
for auto-vectorization? I'm pretty sure I've seen at least SSE2
vectorization on some meta-programming matrix code of mine. Precision
is a real issue for me, so forgive my skepticism.
We hope to do some OSG profiling and experiment with tuning on the Windows side
with VTune: if we find anything interesting we'll post it on our OSG page and
submit code back to the developers.
We don't have a need for 32-bit builds or older compilers but feel free to ask
;) .
Since we need these ourselves we plan to post binaries for future OSG and
compiler releases as a way to give back to the OSG community.
Cheers
Sebastian
Best regards,
Stuart
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=67012#67012
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