物理场景关节Chipmunk

//

//  PhysicsJoints2.hpp

//  day01

//

//  Created by MAC on 16/7/14.

//

//

#ifndef PhysicsJoints2_hpp

#define PhysicsJoints2_hpp

#include <stdio.h>

#include <iostream>

using namespace std;

#include "cocos2d.h"

using namespace cocos2d;

#include "ui/CocosGUI.h"

using namespace cocos2d::ui;

const int DRAG_BODYS_TAG =1;

class PhysicsJoints2:public Layer{

public:

    static Scene* createScene();

    bool init();

    CREATE_FUNC(PhysicsJoints2);

    void onEnter();

    void onExit();

    PhysicsWorld* getPhysicsWorld();

    Sprite* makeBall(Vec2 point, float radius, PhysicsMaterial material = PHYSICSSHAPE_MATERIAL_DEFAULT);

    Sprite* makeBox(Vec2 point, Size size, int color=0, PhysicsMaterial material = PHYSICSSHAPE_MATERIAL_DEFAULT);

private:

    Size visiableSize;

    Vec2 center;

    PhysicsBody* _touchBody;

};

#endif /* PhysicsJoints2_hpp */

//

//  PhysicsJoints2.cpp

//  day01

//

//  Created by MAC on 16/7/14.

//

//

#include "PhysicsJoints2.hpp"

Scene* PhysicsJoints2::createScene(){

    auto scene = Scene::createWithPhysics();

    //set the debug

    scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_ALL);

    //设置重力（x，y）

    scene->getPhysicsWorld()->setGravity(Vec2(0, 0));

    auto layer = PhysicsJoints2::create();

    scene->addChild(layer);

    return scene;

}

bool PhysicsJoints2::init(){

    if (!Layer::init()) {

        return false;

    }

    visiableSize = Director::getInstance()->getVisibleSize();

    center = Vec2(visiableSize.width/2,visiableSize.height/2);//屏幕中心

    _touchBody = nullptr;