Package ch.sahits.game.openpatrician.model.product

Class BezierPriceCalculation

java.lang.Object

ch.sahits.game.openpatrician.model.product.BasePriceCalulation

ch.sahits.game.openpatrician.model.product.BezierPriceCalculation

All Implemented Interfaces:

IPriceCalculationV2

public class BezierPriceCalculation
extends BasePriceCalulation

Price calculation if the curve is defined by a start and end point and two control points, defining the curve as a bezier curve.

Author:

Andi Hotz, (c) Sahits GmbH, 2016 Created on Aug 14, 2016

Constructor Summary

Constructors

Constructor	Description
BezierPriceCalculation()

Method Summary

Modifier and Type	Method	Description
javafx.geometry.Point2D	caclulateBezierPoint(double t, javafx.geometry.Point2D start, javafx.geometry.Point2D cp1, javafx.geometry.Point2D cp2, javafx.geometry.Point2D end)	Calculate the point (x,y-coordinates) on the bezier curve defined by the four control points for parameter t
java.util.List<javafx.geometry.Point2D>	calculateDiscreteBezierPoints(javafx.geometry.Point2D start, javafx.geometry.Point2D cp1, javafx.geometry.Point2D cp2, javafx.geometry.Point2D end)	Calculate a list of points at discrete x coordinates. PRE: The bezier curve does not bend back on itself.
int	computePrice(ITradable tradable, boolean buy, int available, int productionRate, IPopulationStructure pop, ECityState state)	Compute the price for one item of the ware.

Methods inherited from class ch.sahits.game.openpatrician.model.product.BasePriceCalulation

getMaxValue, getMinValue, getSaturation

Methods inherited from class java.lang.Object

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

Constructor Detail

BezierPriceCalculation

public BezierPriceCalculation()

Method Detail

caclulateBezierPoint

public javafx.geometry.Point2D caclulateBezierPoint(double t,
                                                    javafx.geometry.Point2D start,
                                                    javafx.geometry.Point2D cp1,
                                                    javafx.geometry.Point2D cp2,
                                                    javafx.geometry.Point2D end)

Calculate the point (x,y-coordinates) on the bezier curve defined by the four control points for parameter t

Parameters:

t - Value in the range [0,1] defining the fragment length on the curve.

start - control point marking the start of the curve

cp1 - first control point defining the tangential direction of the curve leaving start

cp2 - second control point defining the tangential direction of the curve going into end

end - control point marking the end of the curve.

Returns:

Point (x,y-coordinates) at position t on the curve.

calculateDiscreteBezierPoints

public java.util.List<javafx.geometry.Point2D> calculateDiscreteBezierPoints(javafx.geometry.Point2D start,
                                                                             javafx.geometry.Point2D cp1,
                                                                             javafx.geometry.Point2D cp2,
                                                                             javafx.geometry.Point2D end)

Calculate a list of points at discrete x coordinates.
PRE: The bezier curve does not bend back on itself.

Parameters:

start - control point marking the start of the curve

cp1 - first control point defining the tangential direction of the curve leaving start

cp2 - second control point defining the tangential direction of the curve going into end

end - control point marking the end of the curve.

Returns:

List of points for x coordinates from start to end.

computePrice

public int computePrice(ITradable tradable,
                        boolean buy,
                        int available,
                        int productionRate,
                        IPopulationStructure pop,
                        ECityState state)

Description copied from interface: IPriceCalculationV2

Compute the price for one item of the ware. Though the price is only handled in further computation as integer value, this method returns its value as double so this condition can be tested:
The higher the available amount (but still below the saturation value) the smaller (strictly) the returned value.
For different starting values:
If the starting value b is below starting point a the whole curve of b is below (not necessary strictly) the curve of a. The curve is continues between 0 (inclusive) and infinity.

Parameters:

tradable - defining all the parameters specific for the ware that is traded that is required for the calculation

buy - flag indicating if the calculation should happen for buying or selling.

available - amount of wares that are available in the market

productionRate - amount the city can produce within a week

pop - population structure that may have an influence on the calculated price

state - state of the city

Returns:

price for one item sold