LinAlg

java.lang.Object

org.pathvisio.libgpml.util.LinAlg

public class LinAlg
extends java.lang.Object

Helper class for rotation calculations.

Author:: unknown

Nested Class Summary

Nested Classes

Modifier and Type Class Description

static class LinAlg.Point
Point, pair of doubles.
Constructor Summary

Constructors

Constructor Description

LinAlg()

Method Summary

Modifier and Type	Method	Description
`static double`	`angle(LinAlg.Point p1, LinAlg.Point p2)`	Determines angle between two vectors defined by p1 and p2 Both vectors start at 0.0
`static double`	`direction(LinAlg.Point p1, LinAlg.Point p2)`	negative: ccw positive: cw
`static double`	`distance(LinAlg.Point p1, LinAlg.Point p2)`
`private static double`	`dot(LinAlg.Point v1, LinAlg.Point v2)`
`static LinAlg.Point`	`project(LinAlg.Point p1, LinAlg.Point p2)`	Projection of p1 on p2: p1.p2 ----- .
`static LinAlg.Point`	`project(LinAlg.Point p, LinAlg.Point q, LinAlg.Point v)`	Projection of point q on a line through p with direction vector v If p is 0,0, it's the same as the two-argument function with the same name.
`static LinAlg.Point`	`rotate(LinAlg.Point p, double angle)`
`static double`	`toLineCoordinates(LinAlg.Point start, LinAlg.Point end, LinAlg.Point p)`	Convert a 2-D point to 1-D line coordinates (relative position on the line, range {0,1})

Methods inherited from class java.lang.Object

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

Constructor Details
- LinAlg
  
  public LinAlg()
Method Details
- angle
  
  public static double angle(LinAlg.Point p1, LinAlg.Point p2)
  
  Determines angle between two vectors defined by p1 and p2 Both vectors start at 0.0
  
  Parameters:
  
  p1 - start point of vector
  
  p2 - end point of vector
  
  Returns:
  
  angle in radians
- direction
  
  public static double direction(LinAlg.Point p1, LinAlg.Point p2)
  
  negative: ccw positive: cw
- dot
  
  private static double dot(LinAlg.Point v1, LinAlg.Point v2)
- project
  
  public static LinAlg.Point project(LinAlg.Point p, LinAlg.Point q, LinAlg.Point v)
  
  Projection of point q on a line through p with direction vector v If p is 0,0, it's the same as the two-argument function with the same name.
- toLineCoordinates
  
  public static double toLineCoordinates(LinAlg.Point start, LinAlg.Point end, LinAlg.Point p)
  
  Convert a 2-D point to 1-D line coordinates (relative position on the line, range {0,1})
- project
  
  public static LinAlg.Point project(LinAlg.Point p1, LinAlg.Point p2)
  
  Projection of p1 on p2: p1.p2 ----- . p2 p2.p2
- distance
  
  public static double distance(LinAlg.Point p1, LinAlg.Point p2)
- rotate
  
  public static LinAlg.Point rotate(LinAlg.Point p, double angle)