obj file comparison with the three-dimensional model fbx

obj format ( Wiki CHS ) is produced by the three-dimensional model of the company Wavefront text interchange format (see: the FileFormat-obj ). You may be used to draw the visual studio model format

fbx format ( Wiki ) is a three-dimensional model produced to support Autodesk's animation interchange format (see: the FileFormat-fbx ). Since the format contains a wealth of information, support for text and binary description, it is widely used gaming industry.

Using the QuickTime , the FBX Review , Visual Studio draw the model format

fbx formats are constantly evolving, with many versions: fbx2009, fbx2010, fbx2011 ..., fbx2020 ..., while Autodesk has provided corresponding FBX SDK for use by developers to write different versions of fbx format

Static mesh

#	obj format	fbx format	Remark
A plurality of object	stand by	stand by	Storing a plurality of three-dimensional models in the file
Single object with multiple materials	stand by	stand by
Polygons surface	stand by	stand by	Easily editing software such as 3ds max Note: When introduced into ue4, must triangular face
Normal	stand by	stand by
Material	stand by	stand by
Smooth group ( Smoothing Group )	stand by	stand by	Smooth surface or group of points used to calculate the average normal light, so that the entire mesh area looks smoother
uv copy number	1	Sets
Vertex Color	not support	stand by	When introducing ue4, Vertex Color Import Option to Replace
ue4 lod	not support	stand by	When introducing ue4, check Import Mesh LODs
ue4 simple collision	stand by	stand by	Arbitrary convex body collision naming convention: UCX_ [RenderMeshName], UCX_ [RenderMeshName] _00
socket slot	not support	stand by	Naming: SOCKET_ [RenderMeshName], SOCKET_ [RenderMeshName] _00

Static mesh model import options ( obj VS FBX ):

Skeleton model

fbx support skeleton (Skeleton), skin meshes (Skeletal Mesh) and action sequences (Animation Sequence)

Note 1: The skin cell body level by binding to the skeleton bones / joints, such that movement of the skeletal backbone / joints, the mesh body can change the position of the vertex; binding or maya generally complete in max

Note 2: a fbx file may contain only a skeletal skin mesh or a sequence of actions, may comprise a mesh skin and skeletal plurality of sequences of actions at the same time

Fbx skeletal information of import options :

Fbx only animated sequence import options :

After the introduction, Asset UE4 editor in the following

Note: From left to right, followed Skeletal Mesh , Physics Asset , Skeleton and 3 Animation Sequence

obj file comparison with the three-dimensional model fbx

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