The SpeedTree Engine installation is a simple zip/archive file that can be placed anywhere. The installed folder hierarchy is shown below.
For developing with the Engine library, you’ll just need the speedtree_engine.h header file found in include/ and:
The source/ folder contains sample use code (not the source code to the Engine library itself), including IDV’s test suite used to verify the library’s correctness. The test_suite/ folder itself holds the data used by the test suite program.