?? river.java
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//Coded by Chen Chuan and Dai Xiaoming
//GUI creates a river object using this class and then passes it to MapCanvas
//Only MapCanvas can do the checking and setting to the map matrix
package tools;
import java.awt.Point;
public class River extends AreaTools{
private Point start; //start point of the river
private Point end; //end point of the river
private boolean direction; //0 for hori 1 for vertical
private int size; //the length of the river
public River(Point s, Point e, String name){ //constructor, GUI calls this to create a river
super(s,e);
setID(10); //10 is the ID for river
super.setName(name); //set name in the super class
start=new Point(s);
end=new Point(e);
double x1,x2;
Point temp; //for exchange points
x1=start.getX(); //x value of start point
x2=end.getX(); //x value of end point
if (x1==x2) { //the river is vertical
direction=true;
if (start.getY()>end.getY()) //make sure that the size is positive
size=(int)(start.getY()-end.getY()+1);
else
size=(int)(end.getY()-start.getY()+1);
}
else { //the river is horizontal
direction=false;
if (x1>x2) size=(int)((x1-x2)+1);
else size=(int)((x2-x1)+1);
}
if (x1>x2) //make sure that start.x<=end.x
{temp=start;start=end;end=temp;}
else if (start.getY()>end.getY()) //make sure the start.y<=end.y
{temp=start;start=end;end=temp;}
}
public int getSize(){ //returns the length of the river
return size;
}
public Point getStart(){ //returns the start point of the river
return start;
}
public Point getEnd(){ //returns the end point of the river
return end;
}
public boolean getDirect(){ //returns the direction of the river
return direction;
}
//GetName, SetName inherited
}
/*//delete the function set from river class
package tools;
import java.awt.Point;
public class River extends AreaTools{
private Point start;
private Point end;
private boolean direction; //0 for hori 1 for vertical
private int size;
public River(Point s, Point e, String name){ //already checked in canvas
super(s,e);
setID(10);
super.setName(name);
start=new Point(s);
end=new Point(e);
double x1,x2;
Point temp;
x1=start.getX();
x2=end.getX();
if (x1==x2) {
direction=true;
if (x1>x2) size=(int)((x1-x2)+1);
else size=(int)((x2-x1)+1);
}
else {
direction=false;
if (start.getY()>end.getY())
size=(int)(start.getY()-end.getY()+1);
else
size=(int)(end.getY()-start.getY()+1);
}
if (x1>x2)
//edited by SYS
//{temp=start;start=end;end=start;}
{temp=start;start=end;end=temp;}
//end edited by SYS
else if (start.getY()>end.getY())
//edited by SYS
//{temp=start;start=end;end=start;}
{temp=start;start=end;end=temp;}
//end edited by SYS
}
public int getSize(){
return size;
}
public Point getStart(){
return start;
}
public Point getEnd(){
return end;
}
public boolean getDirect(){
return direction;
}
}*/
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