This tool calculates a normal map from a raw 16 bit unsigned short little endian height map and outputs the generated normal map into a raw 16 bit unsigned short little endian image file. developed against the OS X 10.8 SDK, link this against the Accelerate framework.
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normalMapper.xcodeproj
normalMapper
.gitignore
README.md

README.md

normalMapper

This tool calculates a normal map from a raw 16 bit unsigned short little endian height map and outputs the generated normal map into a raw 16 bit unsigned short little endian image file. Developed against the OS X 10.8 SDK, link this against the Accelerate framework.

image

See http://poniesandlight.co.uk/notes/creating_normal_maps_from_nasa_depth_data/ for a full write-up, and for some super high-rez normal maps of earth.