78 lines
2.8 KiB
Java
78 lines
2.8 KiB
Java
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/**
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* The MIT License
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* Copyright (c) 2014-2016 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.spatialpartition;
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import java.util.ArrayList;
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import java.util.Hashtable;
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import java.util.Random;
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/**
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* Bubble class extends Point. In this example, we create several bubbles in the field,
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* let them move and keep track of which ones have popped and which ones remain.
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*/
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public class Bubble extends Point<Bubble> {
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final int radius;
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Bubble(int x, int y, int id, int radius) {
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super(x,y,id);
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this.radius = radius;
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}
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void move() {
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Random rand = new Random();
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//moves by 1 unit in either direction
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this.x += rand.nextInt(3) - 1;
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this.y += rand.nextInt(3) - 1;
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}
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boolean touches(Bubble b) {
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//distance between them is greater than sum of radii (both sides of equation squared)
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return (this.x - b.x) * (this.x - b.x) + (this.y - b.y) * (this.y - b.y)
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<= (this.radius + b.radius) * (this.radius + b.radius);
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}
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void pop(Hashtable<Integer, Bubble> allBubbles) {
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System.out.println("Bubble " + this.id + " popped at (" + this.x + "," + this.y + ")!");
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allBubbles.remove(this.id);
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}
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void handleCollision(ArrayList<Point> bubblesToCheck, Hashtable<Integer, Bubble> allBubbles) {
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boolean toBePopped = false; //if any other bubble collides with it, made true
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for (int i = 0; i < bubblesToCheck.size(); i++) {
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Integer otherId = bubblesToCheck.get(i).id;
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if (allBubbles.get(otherId) != null && //the bubble hasn't been popped yet
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this.id != otherId && //the two bubbles are not the same
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this.touches(allBubbles.get(otherId))) { //the bubbles touch
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allBubbles.get(otherId).pop(allBubbles);
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toBePopped = true;
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}
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}
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if (toBePopped) {
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this.pop(allBubbles);
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}
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}
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}
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