com.codingame.gameengine.module.entities.Polygon Maven / Gradle / Ivy
package com.codingame.gameengine.module.entities;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
/**
*
* A Polygon specifies an area in a the world defined by a sequence of points.
*
* The coordinates of each point are in world units.
*/
public class Polygon extends Shape {
private static class Point {
int x, y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
}
private List points = new ArrayList<>();
Polygon() {
super();
}
/**
* Adds a point to the path of this Polygon.
*
* @param x
* the x coordinate in world units
* @param y
* the x coordinate in world units
* @return this Polygon
*/
public Polygon addPoint(int x, int y) {
points.add(new Point(x, y));
set("points", asString(points));
return this;
}
/**
* Clears the path of this Polygon.
*
* @return this Polygon
*/
public Polygon clearPoints() {
points.clear();
set("points", asString(points));
return this;
}
/**
* Sets the transition used to animate the positions of each point. Only used if the path has the same number of points.
* @param curve
* the transition to animate between coordinates of each point in the path.
* @return this Polygon
*/
public Polygon setPointsInterpolationCurve(Curve curve) {
set("points", asString(points), curve);
return this;
}
private String asString(List points) {
return points.stream().map(p -> p.x + "," + p.y).collect(Collectors.joining(","));
}
@Override
Entity.Type getType() {
return Entity.Type.POLYGON;
}
}