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

Class 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

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      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 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