/usr/include/o3dgc/ is in libo3dgc-dev 0~20131011-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/o3dgc/o3dgcAdjacencyInfo.h
/usr/include/o3dgc/o3dgcArithmeticCodec.h
/usr/include/o3dgc/o3dgcBinaryStream.h
/usr/include/o3dgc/o3dgcCommon.h
/usr/include/o3dgc/o3dgcDVEncodeParams.h
/usr/include/o3dgc/o3dgcDynamicVector.h
/usr/include/o3dgc/o3dgcDynamicVectorDecoder.h
/usr/include/o3dgc/o3dgcDynamicVectorEncoder.h
/usr/include/o3dgc/o3dgcFIFO.h
/usr/include/o3dgc/o3dgcIndexedFaceSet.h
/usr/include/o3dgc/o3dgcIndexedFaceSet.inl
/usr/include/o3dgc/o3dgcSC3DMCDecoder.h
/usr/include/o3dgc/o3dgcSC3DMCDecoder.inl
/usr/include/o3dgc/o3dgcSC3DMCEncodeParams.h
/usr/include/o3dgc/o3dgcSC3DMCEncoder.h
/usr/include/o3dgc/o3dgcSC3DMCEncoder.inl
/usr/include/o3dgc/o3dgcTimer.h
/usr/include/o3dgc/o3dgcTriangleFans.h
/usr/include/o3dgc/o3dgcTriangleListDecoder.h
/usr/include/o3dgc/o3dgcTriangleListDecoder.inl
/usr/include/o3dgc/o3dgcTriangleListEncoder.h
/usr/include/o3dgc/o3dgcTriangleListEncoder.inl
/usr/include/o3dgc/o3dgcVector.h
/usr/include/o3dgc/o3dgcVector.inl