maspack.geometry.io

Class WavefrontWriter

java.lang.Object

maspack.geometry.io.MeshWriterBase

maspack.geometry.io.WavefrontWriter

All Implemented Interfaces:

MeshWriter

public class WavefrontWriter
extends MeshWriterBase

Writes meshes to an Alias Wavefront .obj file format

Author:

John Lloyd, Jan 2014

Nested Class Summary

Nested classes/interfaces inherited from interface maspack.geometry.io.MeshWriter

MeshWriter.DataFormat, MeshWriter.FloatType

Field Summary

Fields inherited from class maspack.geometry.io.MeshWriterBase

DEFAULT_FORMAT

Constructor Summary

Constructors

Constructor and Description
WavefrontWriter(java.io.File file)
WavefrontWriter(java.io.OutputStream os)
WavefrontWriter(java.lang.String fileName)

Method Summary

Modifier and Type	Method and Description
boolean	getFacesClockwise()
boolean	getZeroIndexed()
void	setFacesClockwise(boolean enable)
void	setZeroIndexed(boolean enable)
static void	writeMesh(java.io.File file, MeshBase mesh)
void	writeMesh(MeshBase mesh)
void	writeMesh(java.io.PrintWriter pw, PointMesh mesh) Writes a PointMesh to a PrintWriter, using an Alias Wavefront "obj" file format.
void	writeMesh(java.io.PrintWriter pw, PolygonalMesh mesh) Writes a PolygonalMesh to a PrintWriter, using an Alias Wavefront "obj" file format.
void	writeMesh(java.io.PrintWriter pw, PolylineMesh mesh) Writes a PolylineMesh to a PrintWriter, using an Alias Wavefront "obj" file format.
static void	writeMesh(java.lang.String fileName, MeshBase mesh)
void	writeString(java.lang.String str)

Methods inherited from class maspack.geometry.io.MeshWriterBase

close, flush, getFormat, getWriteNormals, setFormat, setFormat, setWriteNormals

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WavefrontWriter

public WavefrontWriter(java.io.OutputStream os)
                throws java.io.IOException

Throws:

java.io.IOException

WavefrontWriter

public WavefrontWriter(java.io.File file)
                throws java.io.IOException

Throws:

java.io.IOException

WavefrontWriter

public WavefrontWriter(java.lang.String fileName)
                throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getFacesClockwise

public boolean getFacesClockwise()

setFacesClockwise

public void setFacesClockwise(boolean enable)

getZeroIndexed

public boolean getZeroIndexed()

setZeroIndexed

public void setZeroIndexed(boolean enable)

writeString

public void writeString(java.lang.String str)
                 throws java.io.IOException

Throws:

java.io.IOException

writeMesh

public void writeMesh(MeshBase mesh)
               throws java.io.IOException

Specified by:

writeMesh in interface MeshWriter

Specified by:

writeMesh in class MeshWriterBase

Throws:

java.io.IOException

writeMesh

public void writeMesh(java.io.PrintWriter pw,
                      PolygonalMesh mesh)
               throws java.io.IOException

Writes a PolygonalMesh to a PrintWriter, using an Alias Wavefront "obj" file format. Vertices are printed first, each starting with the letter "v" and followed by x, y, and z coordinates. Faces are printed next, starting with the letter "f" and followed by a list of integers which gives the indices of that face's vertices. Unless getZeroIndexed() returns true, these indices are 1-based, and unless getFacesClockwise() returns true, they are printed in counter-clockwise order. For example, a mesh consisting of a simple tetrahedron might be written like this:

    v 0.0 0.0 0.0
    v 1.0 0.0 0.0
    v 0.0 1.0 0.0
    v 0.0 0.0 1.0
    f 1 2 3
    f 0 2 1
    f 0 3 2
    f 0 1 3
 

The format used to print the vertex, normal, and texture coordinates can be controlled by MeshWriterBase.setFormat(String) or MeshWriterBase.setFormat(NumberFormat). The default format has eight decimal places and is specified by the string "%.8g".

Parameters:

pw - PrintWriter to write the mesh to

mesh - PolygonalMesh to be written.

Throws:

java.io.IOException

writeMesh

public void writeMesh(java.io.PrintWriter pw,
                      PolylineMesh mesh)
               throws java.io.IOException

Writes a PolylineMesh to a PrintWriter, using an Alias Wavefront "obj" file format. Vertices are printed first, each starting with the letter "v" and followed by x, y, and z coordinates. Lines are printed next, starting with the letter "f" and followed by a list of integers which gives the indices of that line's vertices. Unless getZeroIndexed() returns true, these indices are 1-based. An example of a simple three point line is:

    v 1.0 0.0 0.0
    v 0.0 1.0 0.0
    v 0.0 0.0 1.0
    l 0 1 2
 

The format used to print the vertex coordinates can be controlled by MeshWriterBase.setFormat(String) or MeshWriterBase.setFormat(NumberFormat). The default format has eight decimal places and is specified by the string "%.8g".

Parameters:

pw - PrintWriter to write the mesh to

mesh - PolylineMesh to be written

Throws:

java.io.IOException

writeMesh

public void writeMesh(java.io.PrintWriter pw,
                      PointMesh mesh)
               throws java.io.IOException

Writes a PointMesh to a PrintWriter, using an Alias Wavefront "obj" file format. Vertices are printed first, each starting with the letter "v" and followed by x, y, and z coordinates. Normals, if present, are printed next, starting with the letter "vn" and followed by x, y, and z coordinates.

The format used to print the vertex and normal coordinates can be controlled by MeshWriterBase.setFormat(String) or MeshWriterBase.setFormat(NumberFormat). The default format has eight decimal places and is specified by the string "%.8g".

Parameters:

pw - PrintWriter to write this mesh to

mesh - PointMesh to be written

Throws:

java.io.IOException

writeMesh

public static void writeMesh(java.lang.String fileName,
                             MeshBase mesh)
                      throws java.io.IOException

Throws:

java.io.IOException

writeMesh

public static void writeMesh(java.io.File file,
                             MeshBase mesh)
                      throws java.io.IOException

Throws:

java.io.IOException