OBJ (.obj)

Background

▪ Wavefront OBJ format.

▪ 3D geometry format.

▪ Used for storage and exchange of 3D geometry definitions.

▪ Native format of the Wavefront application.

▪ Stores a geometry as a collection of line, point, and polygon primitives and their properties.

▪ Can store face color information.

▪ ASCII format.

▪ Developed by Alias Wavefront.

▪ Stores a single geometry.

Import["file.obj"] imports an OBJ file as a MeshRegion object representing the surface.
Import["file.obj",elem] imports the specified element from an OBJ file.
The import format can be specified with Import["file","OBJ"] or Import["file",{"OBJ",elem,…}].
Export["file.obj",expr] exports a 3D mesh-based geometric region to a binary OBJ file. The expr can be any region that is ConstantRegionQ or a Graphics or Graphics3D object.
Export["file.obj",expr,{opt₁->val₁,…}] exports expr with the specified options for the file format.
The export format can be specified with Export["file",expr,"OBJ"] or Export["file",expr,{"OBJ",opt₁->val₁,…}].
See the reference pages for full general information on Import and Export.
ImportString and ExportString support the OBJ format.

	"Elements"	list of elements available in this file
	"Rules"	list of rules for each element
	"Options"	list of options and settings
	"Summary"	summary of properties
	"CoordinateTransform"	transformation function from OBJ format

Data format representation elements:
"VertexData" list of vertex coordinates

"PolygonData" the polygon elements in indexed form

"VertexNormals" normal vectors corresponding to the vertices
Geometry representation elements:
"BoundaryMeshRegion" boundary mesh representation of the solid

"MeshRegion" mesh representation of the surface
Graphics representation elements:

	"Graphics3D"	OBJ file represented as a Graphics3D object
	"GraphicsComplex"	OBJ file as a GraphicsComplex object
	"PolygonObjects"	list of polygon primitives given in absolute coordinates