BYU (.byu)

Import and Export fully support the BYU format.

Background & Context

- 3D geometry format.
- Used for visualization of 3D polygonal meshes in CAD systems and other applications.
- BYU is an acronym for Brigham Young University.
- ASCII format.
- Represents 3D objects as collections of polygon primitives.
- Can store multiple 3D objects.

Import & Export

Import["file.byu"] imports a BYU file as a MeshRegion object representing the surface.
Import["file.byu",elem] imports the specified element from a BYU file.
The import format can be specified with Import["file","BYU"] or Import["file",{"BYU",elem,…}].
Export["file.byu",expr] exports a 3D mesh-based geometric region to a binary BYU file. The expr can be any region that is ConstantRegionQ or a Graphics or Graphics3D object.
The export format can be specified with Export["file",expr,"BYU"] or Export["file",expr,{"BYU",opt₁val₁,…}].
See the following reference pages for full general information:

	Import, Export	import from or export to a file
	CloudImport, CloudExport	import from or export to a cloud object
	ImportString, ExportString	import from or export to a string
	ImportByteArray, ExportByteArray	import from or export to a byte array

Import Elements

General Import elements:
"Elements" list of elements and options available in this file

"Summary" summary of the file

"Rules" list of rules for all available elements
Data format representation elements:
"VertexData" list of vertex coordinates

"PolygonData" the polygon data in indexed form
Geometry representation elements:
"BoundaryMeshRegion" boundary mesh representation of a solid

"MeshRegion" mesh representation of a surface

"Region" region representation of a surface
Graphics elements:

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

Import and Export use the "MeshRegion" element by default for BYU files.

Examples

open allclose all

Basic Examples (3)Summary of the most common use cases

Import a 3D model from BYU as a MeshRegion object:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-nj1

Out[1]=1

"Summary" properties of the solid model:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-enstil

Out[1]=1

Export a 3D model to an ASCII BYU file:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-u3lkph

Out[1]=1

Print the raw textual contents of the file:

In[2]:=2

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https://wolfram.com/xid/0ck8vtrx-6kuv56

Scope (11)Survey of the scope of standard use cases

Import (6)

Import works on a BYU file:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-qzdt5a

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Any accessible URL:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-gleixe

Out[1]=1

Stream:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-tgzw4

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0ck8vtrx-care6j

Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0ck8vtrx-ll8we5

Out[3]=3

Import automatically detects BYU files:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-pbu2ww

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Import provides access to elements in the BYU file:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-obu11p

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Import works on large files:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-geokw1

Out[1]=1

Export (5)

Export works on 3D graphics:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-5qjue

Out[1]=1

Special regions:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-jkpjvf

Out[1]=1

Formula regions:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-26h70

Out[1]=1

Mesh regions:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-d1c9he

Out[1]=1

Export to an ASCII BYU file:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-dnnsik

Out[1]=1

Import Elements (9)

"BoundaryMeshRegion" (1)

Give a BoundaryMeshRegion:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-0y5dwl

Out[1]=1

"Graphics3D" (1)

Give the Graphics3D object:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-vun69g

Out[1]=1

"GraphicsComplex" (1)

Give the GraphicsComplex object:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-61v4rq

Out[1]=1

"MeshRegion" (1)

Give the MeshRegion:

In[2]:=2

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https://wolfram.com/xid/0ck8vtrx-8j95zi

Out[2]=2

"PolygonData" (1)

Give the polygon elements in indexed form:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-y8p9o1

Out[1]=1

"PolygonObjects" (1)

Give the list of Triangle primitives given in absolute coordinates:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-6nbuok

"Region" (1)

Give a Region:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-kdbma8

Out[1]=1

"Summary" (1)

Give the "Summary" of properties:

In[1]:=1

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https://wolfram.com/xid/0ck8vtrx-p1coo3

Out[1]=1

File size:

In[2]:=2

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https://wolfram.com/xid/0ck8vtrx-drtjm7

Out[2]=2

"VertexData" (1)

Give the vertex coordinates:

In[1]:=1

✖

https://wolfram.com/xid/0ck8vtrx-7cfvxj

Out[1]=1

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