Package ch.sahits.game.openpatrician.display.service

Class BezierPathConverter

java.lang.Object

ch.sahits.game.openpatrician.display.service.BezierPathConverter

All Implemented Interfaces:

IPathConverter

public class BezierPathConverter
extends java.lang.Object
implements IPathConverter

Create a Bezier path based on a set of points. The implementation is based on work described in http://devmag.org.za/2011/06/23/bzier-path-algorithms/

Author:

Andi Hotz, (c) Sahits GmbH, 2016 Created on Jan 05, 2016

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	BezierPathConverter.Distances

Field Summary

Fields

Modifier and Type	Field	Description
private Date	date
private PathInterpolatorMap	interpolators
private IMapImageServiceFacade	mapImageService
private MapService	mapService
private TravellingVessels	vessels

Constructor Summary

Constructors

Constructor	Description
BezierPathConverter()

Method Summary

Modifier and Type	Method	Description
private java.util.List<javafx.geometry.Point2D>	applyScale(java.util.List<javafx.geometry.Point2D> pointedPath, double scale)
long	calculateDuration(INavigableVessel vessel, PathInterpolator interpolator, double fraction)	Calculate the duration of the travel in milliseconds in real time for the specified fraction of the total distance
private BezierPath	convertToPathModel(java.util.List<javafx.geometry.Point2D> points)
java.util.Optional<javafx.scene.shape.Path>	createPath(INavigableVessel vessel, java.util.List<javafx.geometry.Point2D> pointedPath, double scale)	Create a path shape out of a list of points.
(package private) java.util.List<javafx.geometry.Point2D>	interpolate(java.util.List<javafx.geometry.Point2D> segmentPoints, float scale)	Calculate the controlpoints for a given list of points on the curve.
java.util.List<javafx.geometry.Point2D>	reduceLinePoints(java.util.List<javafx.geometry.Point2D> initialPoints)	Reduce the number of points that are needed to describe the path.

Methods inherited from class java.lang.Object

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

Field Detail

mapImageService

@Autowired
private IMapImageServiceFacade mapImageService

vessels

@Autowired
private TravellingVessels vessels

interpolators

@Autowired
private PathInterpolatorMap interpolators

date

@Autowired
private Date date

mapService

@Autowired
private MapService mapService

Constructor Detail

BezierPathConverter

public BezierPathConverter()

Method Detail

createPath

public java.util.Optional<javafx.scene.shape.Path> createPath(INavigableVessel vessel,
                                                              java.util.List<javafx.geometry.Point2D> pointedPath,
                                                              double scale)

Description copied from interface: IPathConverter

Create a path shape out of a list of points. When the path is created the vessel will be added to the TravellingVessels container.

Specified by:

createPath in interface IPathConverter

Parameters:

vessel - vessel that is traveling the path.

pointedPath - input points.

scale - scaling that is used on the path due to the sacle of the map.

Returns:

shape representing a path if the vessels owner is a human player. Otherwise the path is not needed.

calculateDuration

public long calculateDuration(INavigableVessel vessel,
                              PathInterpolator interpolator,
                              double fraction)

Description copied from interface: IPathConverter

Calculate the duration of the travel in milliseconds in real time for the specified fraction of the total distance

Specified by:

calculateDuration in interface IPathConverter

Parameters:

vessel - that is traveling

interpolator - used to hold the path information

fraction - value between [0,1]. 1 means that the whole distance is traveled.

Returns:

real time duration of the travel in milliseconds.

applyScale

private java.util.List<javafx.geometry.Point2D> applyScale(java.util.List<javafx.geometry.Point2D> pointedPath,
                                                           double scale)

interpolate

java.util.List<javafx.geometry.Point2D> interpolate(java.util.List<javafx.geometry.Point2D> segmentPoints,
                                                    float scale)

Calculate the controlpoints for a given list of points on the curve.

Parameters:

segmentPoints - List of points that make up the curve

scale - to be used for the length of the handles

Returns:

List of controlpoints including the points on the line.

convertToPathModel

private BezierPath convertToPathModel(java.util.List<javafx.geometry.Point2D> points)

reduceLinePoints

public java.util.List<javafx.geometry.Point2D> reduceLinePoints(java.util.List<javafx.geometry.Point2D> initialPoints)

Reduce the number of points that are needed to describe the path. Points that do not change the direction of the path can be eliminated if:

• The distance to the last point left is larger than the distance to the shore

Specified by:

reduceLinePoints in interface IPathConverter

Parameters:

initialPoints - initial point of the line

Returns:

list of points making up the path