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.
Similar Tools
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.
Usage
$ 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 cmakeThis 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++-5Now you're ready to build! Here's how to invoke CMake so that it puts all the messy stuff into a folder called build:
$ cmake . -Bbuild # Generate Makefile
$ cmake --build build # Build the Makefile