OpenDroneMap / Obj2Tiles

Converts OBJ files to OGC 3D tiles by performing splitting, decimation and conversion
GNU Affero General Public License v3.0
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normal maps in ObjTiles #47

Open PerspectivesLab opened 11 months ago

PerspectivesLab commented 11 months ago

Hi there, while working with ObjTiles i figured out normal maps arent supported for the OBJ import/export the "norm" attribute isnt featured in the official OBJ format specs, but has been extended for physically-based rendering in various softwares read more here

Pr/map_Pr     # roughness
Pm/map_Pm     # metallic
Ps/map_Ps     # sheen
Pc            # clearcoat thickness
Pcr           # clearcoat roughness
Ke/map_Ke     # emissive
aniso         # anisotropy
anisor        # anisotropy rotation
**norm          # normal map (RGB components represent XYZ components of the surface normal)**

is that an extension that ObjTiles author would consider ? having normal map read / write feature would be usefull, more over do you know if the 3D tiles specifications ( gltf buffer ) will allow a diffuse + normal information ? thx