maspack.geometry

Class Polyline

java.lang.Object

maspack.geometry.Polyline

public class Polyline
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
int	idx
int	myWorldCoordCnt

Constructor Summary

Constructors

Constructor and Description
Polyline(int idx) Creates an empty polyline with a specified index value.
Polyline(Polyline p) Creates a duplicate copy of a polyline

Method Summary

Modifier and Type	Method and Description
double	computeLength() Computes the length of this line.
int	getIndex() Returns the index value for this polyline.
LineSegment[]	getSegments() Creates a list of line segments
Vertex3d	getVertex(int idx)
int[]	getVertexIndices()
Vertex3d[]	getVertices() Do not replace individual vertices in this array
Point3d	interpolatePosition(double s) Interpolate point along polyline
Vector3d	interpolateTangent(double s) Interpolate tangent vector to polyline at specified point
static void	main(java.lang.String[] args)
int	numVertices()
void	set(Vertex3d[] vtxs, int numVtxs) Creates a line a list of vertices.
void	updateBounds(Point3d min, Point3d max)
double	updateLengths() Computes the length of this line and per-segment length info.

Methods inherited from class java.lang.Object

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

Field Detail

idx

public int idx

myWorldCoordCnt

public int myWorldCoordCnt

Constructor Detail

Polyline

public Polyline(int idx)

Creates an empty polyline with a specified index value.

Parameters:

idx - desired index value

Polyline

public Polyline(Polyline p)

Creates a duplicate copy of a polyline

Method Detail

getIndex

public int getIndex()

Returns the index value for this polyline.

Returns:

index value

getVertexIndices

public int[] getVertexIndices()

set

public void set(Vertex3d[] vtxs,
                int numVtxs)

Creates a line a list of vertices.

Parameters:

vtxs - vertices to form the line

numVtxs - number of vertices

computeLength

public double computeLength()

Computes the length of this line.

updateLengths

public double updateLengths()

Computes the length of this line and per-segment length info.

interpolatePosition

public Point3d interpolatePosition(double s)

Interpolate point along polyline

Parameters:

s - - normalized curve parameter in range [0-1]

Returns:

point along polyline at s

interpolateTangent

public Vector3d interpolateTangent(double s)

Interpolate tangent vector to polyline at specified point

Parameters:

s - - normalized curve parameter in range [0-1]

Returns:

tangent to polyline curve at s

updateBounds

public void updateBounds(Point3d min,
                         Point3d max)

numVertices

public int numVertices()

getVertices

public Vertex3d[] getVertices()

Do not replace individual vertices in this array

Returns:

list of vertices

getVertex

public Vertex3d getVertex(int idx)

getSegments

public LineSegment[] getSegments()

Creates a list of line segments

Returns:

list of line segments

main

public static void main(java.lang.String[] args)