Specify Eigen3_DIR in iOS and Android Travis CI builds - Required after updates to use Eigen's own Eigen3Config.cmake instead of our original FindEigen.cmake module. Change-Id: I9b5ad43fa153713c64fc01d638611e9bae3a169b
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.