//用平台封装的函数进行碰撞检测
//将砖块精灵放入一个数组（容器）之中然后一 一进行碰撞检测
bool MyMap::isCollideWithHeroX()
{
for(auto x:Road)
{
if(x->boundingBox().intersectsRect(myHero->getSprite()->boundingBox())) //boundingBox().intersectsRect(）这个函数获取的是精灵的标准矩形，如果要更精确的检测可以自己获取一个不规则多边形进行检测
{
return true;
}
}
return false;
}
//网上学习
检测矩形与矩形碰撞的函数：
bool intersectsRect(const CCRect &rect) 使用方法： rect1.intersectsRect(rect2);
检测点与矩形碰撞的函数： bool containsPoint(const CCPoint &point) 使用方法： rect.containsPoint(point);
下面重点说矩形与圆形的碰撞检测： PS：先说一下cocos2d-x中的矩形Rect，Rect的构造有四个参数，x,y,width,height,如下图所示
//
// CGCircle.h
// HelloCpp
// Created by Mike on 14-1-16.
//
#ifndef __HelloCpp__CGCircle__
#define __HelloCpp__CGCircle__
#include <iostream>
#include"cocos2d.h"
using namespace std;
using namespace cocos2d;
classCGCircle
{
private:
//float _radius; //半径
//Point _position; //圆心
publicCC_SYNTHESIZE(float,_radius,Radius);
CC_SYNTHESIZE(Point,_position,Position);
CGCircle(radius,Point position): _radius(radius),_position(position){};
bool isContainRect(Rect rect);
};
#endif/* defined(__HelloCpp__CGCircle__) */</iostream>
// CGCircle.cpp
"CGCircle.h"
bool CGCircle::isContainRect(Rect rect)
bool _isContian =false;
Point orign = _position;//圆心，新建坐标系的原点
//圆的外切正方形 Rect(x,heigth) x,y是原点，左下顶点
Rect square = Rect::Rect(_position.x - _radius,_position.y - _radius,
2* _radius,* _radius);
doPoint rectVertex0 = rect.origin;//左下
Point rectVertex1 = rect.origin + Point(rect.size.width,0);background-color:inherit;">0);//右下
Point rectVertex2 = rect.origin + Point(rect.size.width,rect.size.height);//右上
Point rectVertex3 = rect.origin + Point(//左上
Point pos[] = {rectVertex0,rectVertex1,rectVertex2,rectVertex3};
if((pos[1].x - orign.x) * (pos[3].x - orign.x) >&&
(pos[].y - orign.y) * (pos[].y - orign.y) >)
//右下顶点和左上顶点在同一象限，说明整个矩形位于一个象限内 若各顶点至少有一个在圆内则相交
for(inti =; i <4; i++) {
//判断矩形四个顶点是否至少有一个位于圆内
(((pos[i].x - orign.x) * (pos[i].x - orign.x)
+ (pos[i].y - orign.y) * (pos[i].y - orign.y))
<= _radius * _radius)
gotonext;
}
(square.intersectsRect(rect)) {
(pos[i] == orign) {
breaknext:
_isContian =true}while);
return_isContian;
Size visibleSize = Director::getInstance()->getVisibleSize();
auto circleS = Sprite::create("circle.png"circleS->setPosition(Point(visibleSize.width/));
this->addChild(circleS,monospace;font-size:1em;line-height:1.1em;background-color:inherit;">auto rectS = Sprite::create("rect.png"rectS->setPosition(Point(circleS->getPositionX() -100->addChild(rectS,monospace;font-size:1em;line-height:1.1em;background-color:inherit;">CGCircle circle0 = CGCircle(circleS->getContentSize().width/Rect rect0 = Rect(rectS->getPositionX() - rectS->getContentSize().width/rectS->getPositionY() - rectS->getContentSize().height/rectS->getContentSize().width,rectS->getContentSize().height);
(circle0.isContainRect(rect0)) {
CCLOG("circleS与rectS碰撞了"else"circleS与rectS未碰撞"radius =30.0Point position = Point(300CGCircle circle = CGCircle(radius,position);
Rect rect1 = Rect(2802901030(circle.isContainRect(rect1))
"矩形1与圆碰撞了"Rect rect2 = Rect(210(! circle.isContainRect(rect2))
"矩形2与圆未碰撞"
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。