cocos2d-x 3.10 显示Box2d 调试视图

1.将cocos2d-x-3.10\tests\cpp-tests\Classes\Box2DTestBed目录下的GLES-Render.h和GLES-Render.cpp拷贝到当前项目的Classes目录下。

2.在visual studio2013打开当前项目解决方案，在解决方案资源管理器的src下右键->添加->现有项，选择刚才拷贝到Classes目录下GLES-Render.h和GLES-Render.cpp。

Box2dTest.h

 #ifndef _BOX2D_TEST_H_
 #define _BOX2D_TEST_H_
 #include "cocos2d.h"
 #include "Box2D\Box2D.h"
 USING_NS_CC;
 class Box2dTest:public Node{
 public:
     Box2dTest();
     ~Box2dTest();
     virtual bool init();
     void update(float) override;
     virtual void draw(Renderer *renderer, const Mat4& transform, uint32_t flags) override;
     CREATE_FUNC(Box2dTest);
 private:
     b2World* _world;
 };
 #endif

Box2dTest.cpp

 #include "Box2dTest.h"
 #include "GLES-Render.h"

 #define PTM_RATIO 32

 Box2dTest::Box2dTest(){

 }

 Box2dTest::~Box2dTest(){
     CC_SAFE_DELETE(_world);
 }

 bool Box2dTest::init(){
     if (!Node::init())return false;
     _world = new b2World(b2Vec2(0.0f, 0.0f));

     //创建一个矩形刚体
     b2BodyDef boxDef;
     boxDef.position.Set(/PTM_RATIO,/PTM_RATIO);
     b2Body* box = _world->CreateBody(&boxDef);
     b2PolygonShape boxShape;
     boxShape.SetAsBox(/PTM_RATIO, /PTM_RATIO);
     box->CreateFixture(&boxShape,);

     //调试视图
     GLESDebugDraw* debugDraw = new GLESDebugDraw(PTM_RATIO);
     _world->SetDebugDraw(debugDraw);
     uint32 flags = ;
     flags += b2Draw::e_shapeBit;
     flags += b2Draw::e_pairBit;
     flags += b2Draw::e_centerOfMassBit;
     debugDraw->SetFlags(flags);

     scheduleUpdate();
     return true;
 }

 void Box2dTest::update(float delta){
     _world->Step(30.0f, , );
 }

 void Box2dTest::draw(Renderer *renderer, const Mat4& transform, uint32_t flags){
     Node::draw(renderer, transform, flags);

     ccGLEnableVertexAttribs(kCCVertexAttribFlag_Position);
     kmGLPushMatrix();
     _world->DrawDebugData();
     kmGLPopMatrix();
     CHECK_GL_ERROR_DEBUG();
 }

HelloWorld.cpp下的init()函数下添加：

 Box2dTest* box2dTest=Box2dTest::create();
 addChild(box2dTest);