Package math

Class Line

  • public class Line
extends java.lang.Object
    Author:
    GBEMIRO

    • Constructor Summary

      Constructors 
      Constructor Description
      Line()
      Creates a straight line parallel to the x axis
      Line​(double m, double c)
      Creates a new Line object give the gradient and the y intercept
      Line​(double x1, double y1, double x2, double y2)
      Creates a line between points joining: the points x1,y1 and x2,y2
      Line​(double m, Point p)
      Creates a new Line object give the gradient and a point on the line.
      Line​(Point p1, Point p2)
      Creates a line between points joining: the points p1 and p2

    • Method Summary

      Modifier and Type Method Description
      boolean approxEquals​(double val1, double val2)
      Compares two numbers to see if they are close enough to be almost the same It checks if the values deviate by 1.0E-14 or lesser.
      boolean approxEquals​(double val1, double val2, double minDeviation)
      Compares two numbers to see if they are close enough to be almost the same It checks if the values deviate by 1.0E-14 or lesser.
      double distance​(Point p1, Point p2)
      Finds the distance between 2 Point objects lying on this Line object They must lie on this Line object, else the method will return 0;
      double distanceSquared​(Point p1, Point p2)
      Finds the square of the distance between 2 Point objects lying on this Line object They must lie on this Line object, else the method will return 0;
      void draw​(java.lang.Object g, double x1, double x2)
      Draws this Line object for the interval between x1 and x2.
      double getC()  
      double getM()  
      double getX​(double y)  
      double getY​(double x)  
      Point intersectionWithLine​(Line line)  
      boolean intersectsLine​(Line line)  
      boolean isParallelTo​(Line line)
      Checks if this Line object is parallel to another.
      static void main​(java.lang.String[] args)  
      boolean passesThroughPoint​(Point p1)  
      void setC​(double c)  
      void setM​(double m)  
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • Line

        public Line()
        Creates a straight line parallel to the x axis

      • Line

        public Line​(double m,
            double c)
        Creates a new Line object give the gradient and the y intercept
        Parameters:
        m - the gradient of the Line object
        c - the y intercept of the Line object

      • Line

        public Line​(double m,
            Point p)
        Creates a new Line object give the gradient and a point on the line.
        Parameters:
        m - the gradient of the Line object
        p - a Point object that lies on the Line object.

      • Line

        public Line​(double x1,
            double y1,
            double x2,
            double y2)
        Creates a line between points joining: the points x1,y1 and x2,y2
        Parameters:
        x1 - the x coordinate of the first point
        y1 - the y coordinate of the first point
        x2 - the x coordinate of the second point
        y2 - the y coordinate of the second point

      • Line

        public Line​(Point p1,
            Point p2)
        Creates a line between points joining: the points p1 and p2
        Parameters:
        p1 - the first point
        p2 - the second point

    • Method Detail

      • setM

        public void setM​(double m)
        Parameters:
        m - sets the gradient of this Line.

      • getM

        public double getM()
        Returns:
        the gradient of this Line.

      • setC

        public void setC​(double c)
        Parameters:
        c - sets the intercept of this Line.

      • getC

        public double getC()
        Returns:
        the intercept of this Line.

      • getX

        public double getX​(double y)
        Parameters:
        y - the y coordinate of a given point on a Line object.
        Returns:
        the x coordinate of that point.

      • getY

        public double getY​(double x)
        Parameters:
        x - the x coordinate of a given point on a Line object.
        Returns:
        the y coordinate of that point.

      • distance

        public double distance​(Point p1,
                       Point p2)
        Finds the distance between 2 Point objects lying on this Line object They must lie on this Line object, else the method will return 0;
        Parameters:
        p1 - the first Point object to consider
        p2 - the second Point object to consider
        Returns:
        the distance along this Line object between the 2 given Point objects lying on it

      • distanceSquared

        public double distanceSquared​(Point p1,
                              Point p2)
        Finds the square of the distance between 2 Point objects lying on this Line object They must lie on this Line object, else the method will return 0;
        Parameters:
        p1 - the first Point object to consider
        p2 - the second Point object to consider
        Returns:
        the distance along this Line object between the 2 given Point objects lying on it

      • intersectsLine

        public boolean intersectsLine​(Line line)
        Parameters:
        line - the Line object to be checked if or not it intersects with this one.
        Returns:
        true if the 2 Line objects intersect.

      • isParallelTo

        public boolean isParallelTo​(Line line)
        Checks if this Line object is parallel to another.
        Parameters:
        line - the Line object to be checked against this one for parallelism
        Returns:
        true if it is parallel to the other Line object

      • passesThroughPoint

        public boolean passesThroughPoint​(Point p1)
        Parameters:
        p1 - the Point object that we wish to check if or not it lies on this Line object.
        Returns:
        true if it lies on this Line object

      • intersectionWithLine

        public Point intersectionWithLine​(Line line)
        Parameters:
        line - the Line object whose point of intersection with this Line object is required
        Returns:
        the point of intersection of both Line objects

      • draw

        public void draw​(java.lang.Object g,
                 double x1,
                 double x2)
        Draws this Line object for the interval between x1 and x2.
        Parameters:
        g - The Graphics object used to draw this Line object.
        x1 - The x coordinate of the first point on this Line object where drawing is to start
        x2 - The x coordinate of the second point on this Line object where drawing is to start

      • approxEquals

        public boolean approxEquals​(double val1,
                            double val2)
        Compares two numbers to see if they are close enough to be almost the same It checks if the values deviate by 1.0E-14 or lesser.
        Parameters:
        val1 - the first value to compare
        val2 - the second value to compare
        Returns:
        true if the values deviate by 1.0E-14 or lesser.

      • approxEquals

        public boolean approxEquals​(double val1,
                            double val2,
                            double minDeviation)
        Compares two numbers to see if they are close enough to be almost the same It checks if the values deviate by 1.0E-14 or lesser.
        Parameters:
        val1 - the first value to compare
        val2 - the second value to compare
        minDeviation - the minimum difference they must have to be acceptably equal.
        Returns:
        true if the values deviate by 1.0E-14 or lesser.

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • main

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