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CATIA V5 format (Windows only)
Appendix
Encapsulated Postscript format
OBJ format
The OBJ file format is a ASCII form. It supports
a variety of geometry ranging from polygons to high degree NURBS
surfaces.
The following types of data may be included
in an OBJ file. In this list, the keyword (in parentheses) follows
the data type.
Vertex data
- geometric
vertices (v)
- texture
vertices (vt)
- vertex
normals (vn)
- parameter
space vertices (vp)
Free-form curve/surface attributes
- rational
or non-rational forms of curve or surface type.
Basis matrix, Bezier, B-spline, Cardinal, Taylor (cstype)
- degree
(deg)
- basis
matrix (bmat)
- step
size (step)
Elements
- point
(p)
- line
(l)
- face
(f)
- curve
(curv)
- 2D
curve (curv2)
- surface
(surf)
Free-form curve/surface body statements
- parameter
values (parm)
- outer
trimming loop (trim)
- inner
trimming loop (hole)
- special
curve (scrv)
- special
point (sp)
- end
statement (end)
Connectivity between free-form surfaces
Grouping
- group
name (g)
- smoothing
group (s)
- merging
group (mg)
- object
name (o)
Display/render attributes
- bevel
interpolation (bevel)
- color
interpolation (c_interp)
- dissolve
interpolation (d_interp)
- level
of detail (lod)
- material
name (usemtl)
- material
library (mtllib)
- shadow
casting (shadow_obj)
- ray
tracing (trace_obj)
- curve
approximation technique (ctech)
- surface
approximation technique (stech)