This little public domain tool does the following:
- Generates reasonable UV's for any topologically "clean" mesh.
- Creates a texture representing ambient occlusion.
The first bullet uses Thekla's parameterization code; the second bullet uses Intel's embree library for raytracing.
Texture coordinates can be generated using Microsoft's open source UVAtlas tool, which is a somewhat Windows-oriented project.
libigl can do mesh parameterization and ambient occlusion baking. It is protected by the Mozilla Public License.
IBLBaker does something completely different, but also looks interesting.
$ aobaker --help Usage: aobaker [options] input_mesh.obj Options: --outmesh OBJ file to produce (result.obj) --atlas PNG file to produce (result.png) --sizehint Controls resolution of atlas (32) --nsamples Quality of ambient occlusion (128) --gbuffer Generate diagnostic images --ids Add a chart id to the alpha channel --multiply Scales the AO values by a constant (1.0) --version Output version --help Output help
Building in OS X
Homebrew is the easiest way to install the dependencies:
$ cp ~/git/aobaker/embree.rb /usr/local/Library/Formula $ brew install embree tbb cmake
This is optional, but you might want to use a compiler that supports OpenMP, which is a bit tricky if you've already got clang installed. Here's how I did it:
brew uninstall gcc brew install gcc --without-multilib export CC=/usr/local/bin/gcc-5 export CXX=/usr/local/bin/g++-5
Now you're ready to build! Here's how to invoke CMake so that it puts all the messy stuff into a folder called
$ cmake . -Bbuild # Generate Makefile $ cmake --build build # Build the Makefile