A GPLv3 licensed CLI heightmap to normalmap converter written in C++.
for linux (g++): g++ height2normal.cpp -o height2normal -lm -O2
for linux/termux (clang++): clang++ height2normal.cpp -o height2normal -lm -O2
for win64 (mingw-w64): g++ height2normal.cpp -o height2normal_w64.exe -static-libgcc -static-libstdc++ -lm -O2
run the binary with no arguments or with the --help flag for details on how to use this program.