/usr/include/collada2gltf/ is in libcollada2gltfconvert-dev 20140924-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/collada2gltf/COLLADA2GLTFExport.h
/usr/include/collada2gltf/COLLADA2GLTFWriter.h
/usr/include/collada2gltf/GLTF/
/usr/include/collada2gltf/GLTF/GLTF.h
/usr/include/collada2gltf/GLTF/GLTFAccessor.h
/usr/include/collada2gltf/GLTF/GLTFAccessorCache.h
/usr/include/collada2gltf/GLTF/GLTFAnimation.h
/usr/include/collada2gltf/GLTF/GLTFAsset.h
/usr/include/collada2gltf/GLTF/GLTFBuffer.h
/usr/include/collada2gltf/GLTF/GLTFConfig.h
/usr/include/collada2gltf/GLTF/GLTFEffect.h
/usr/include/collada2gltf/GLTF/GLTFExtraDataHandler.h
/usr/include/collada2gltf/GLTF/GLTFExtras.h
/usr/include/collada2gltf/GLTF/GLTFInputStream.h
/usr/include/collada2gltf/GLTF/GLTFMesh.h
/usr/include/collada2gltf/GLTF/GLTFOutputStream.h
/usr/include/collada2gltf/GLTF/GLTFPrimitive.h
/usr/include/collada2gltf/GLTF/GLTFProfile.h
/usr/include/collada2gltf/GLTF/GLTFSkin.h
/usr/include/collada2gltf/GLTF/GLTFTypesAndConstants.h
/usr/include/collada2gltf/GLTF/GLTFUtils.h
/usr/include/collada2gltf/GLTF/GLTFWriter.h
/usr/include/collada2gltf/GLTFOpenCOLLADA.h
/usr/include/collada2gltf/GLTFOpenCOLLADAUtils.h
/usr/include/collada2gltf/GitSHA1.h
/usr/include/collada2gltf/JSON/
/usr/include/collada2gltf/JSON/JSONArray.h
/usr/include/collada2gltf/JSON/JSONNumber.h
/usr/include/collada2gltf/JSON/JSONObject.h
/usr/include/collada2gltf/JSON/JSONString.h
/usr/include/collada2gltf/JSON/JSONValue.h
/usr/include/collada2gltf/assetModifiers/
/usr/include/collada2gltf/assetModifiers/GLTFAssetModifier.h
/usr/include/collada2gltf/assetModifiers/GLTFFlipUVModifier.h
/usr/include/collada2gltf/convert/
/usr/include/collada2gltf/convert/animationConverter.h
/usr/include/collada2gltf/convert/meshConverter.h
/usr/include/collada2gltf/helpers/
/usr/include/collada2gltf/helpers/encodingHelpers.h
/usr/include/collada2gltf/helpers/geometryHelpers.h
/usr/include/collada2gltf/helpers/mathHelpers.h
/usr/include/collada2gltf/shaders/
/usr/include/collada2gltf/shaders/commonProfileShaders.h