cocos2d实现2D地图A*广度路径算法

.h

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

USING_NS_CC;

enum PatchFront
{
	Uper = 1,
	Down = 2,
	Left = 3,
	Right = 4,
};

struct SinglePatch;
static SinglePatch* patchvector[32][32];

struct SinglePatch
{
public:
	static SinglePatch* CreatePatch(int row, int field)
	{
		SinglePatch* TempPatch = new SinglePatch(row, field);
		return TempPatch;
	}

	Sprite* GetVision() const { return pSprite; }

	SinglePatch* GetPatchNear(PatchFront f)
	{
		SinglePatch* returnpatch = nullptr;
		switch (f)
		{
		case Uper:
			if (Row + 1 >= 32)
				return nullptr;
			returnpatch = patchvector[Row + 1][Field];
			break;
		case Down:
			if (Row - 1 < 0)
				return nullptr;
			returnpatch = patchvector[Row - 1][Field];
			break;
		case Left:
			if (Field - 1 < 0)
				return nullptr;
			returnpatch = patchvector[Row][Field - 1];
			break;
		case Right:
			if (Field + 1 >= 32)
				return nullptr;
			returnpatch = patchvector[Row][Field + 1];
			break;
		}
		if (returnpatch->IsMarked)
			return nullptr;

		return returnpatch;
	}

	void Marked()
	{
		pSprite->setTexture("Finded.png");
	}

	void SetStep(int step)
	{
		Step = step;
		char msg[20];
		snprintf(msg, 20, "%d", step);
		pText->setString(msg);
		pSprite->setTexture("Marked.png");
	}

	void _draw()
	{
		pSprite->setTexture("WayPoint.png");
	}

	void SetBefore(SinglePatch* before)	{ BeforeStep = before; }

	void DrawWayPoint()
	{
		_draw();
		SinglePatch* Before = BeforeStep;
		while (Before)
		{
			Before->_draw();
			Before = Before->BeforeStep;
		}
	}

	int Step;
	bool IsMarked;
private:

	SinglePatch(int row, int field) : Row(row), Field(field), Step(0), IsMarked(false), BeforeStep(nullptr)
	{
		pSprite = Sprite::create("SinglePatch.png");
		pSprite->setAnchorPoint(Vec2(0, 0));
		pSprite->setPosition(row * 30, field * 30);

		char msg[255];
		snprintf(msg, 255, "%d|%d", row, field);
		pText = LabelTTF::create();
		pText->setString(msg);
		pText->setHorizontalAlignment(TextHAlignment::CENTER);
		pText->setVerticalAlignment(TextVAlignment::CENTER);
		pText->setPosition(pSprite->getContentSize() / 2);
		pText->setColor(ccc3(0, 0, 0));
		pText->setFontSize(18);
		pSprite->addChild(pText);
	}
	~SinglePatch();

	int Row;
	int Field;
	Sprite* pSprite;
	LabelTTF* pText;
	SinglePatch* BeforeStep;

};

class HelloWorld : public cocos2d::Layer
{
public:
    static cocos2d::Scene* createScene();

    virtual bool init();
    
    // implement the "static create()" method manually
    CREATE_FUNC(HelloWorld);

	void FindPatch(SinglePatch* _patch, int Step);
	void Begin();
private:

	SinglePatch* StartPoint;
	SinglePatch* EndPoint;

	bool Finded;
	std::list<SinglePatch*> ArrayBefore;
	std::list<SinglePatch*> ArrayAfter;
};

#endif

#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"

USING_NS_CC;

Scene* HelloWorld::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::create();
    
    // 'layer' is an autorelease object
    auto layer = HelloWorld::create();
	layer->setTag(159);
    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    //
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }
    
	for (int i = 0; i < 32; i++)
	{
		for (int j = 0; j < 32; j++)
		{
			SinglePatch* patch = SinglePatch::CreatePatch(i, j);
			addChild(patch->GetVision());
			patchvector[i][j] = patch;
		}
	}

	EndPoint = patchvector[rand() % 31][rand() % 31];
	Finded = false;
	StartPoint = patchvector[15][15];
	StartPoint->SetStep(0);
	StartPoint->IsMarked = true;

	ArrayBefore.push_back(StartPoint);

	std::thread th(&HelloWorld::Begin, this);
	th.detach();
	
    return true;
}

void HelloWorld::Begin()
{
//_begin:
	while (ArrayBefore.size())
	{
		if (Finded)
			break;
		SinglePatch* TempSreach = *ArrayBefore.begin();
		ArrayBefore.pop_front();
		FindPatch(TempSreach, TempSreach->Step);
	}

	//goto _begin;
}

void HelloWorld::FindPatch(SinglePatch* _StartPatch, int Step)
{
	for (int i = Uper; i != Right + 1; i++)
	{
		SinglePatch* tempPatch = _StartPatch->GetPatchNear((PatchFront)i);
		if (tempPatch == EndPoint)
		{
			tempPatch->Marked();
			_StartPatch->DrawWayPoint();
			Finded = true;
			return;
		}
		if (tempPatch)
		{
			tempPatch->SetBefore(_StartPatch);
			tempPatch->SetStep(Step + 1);
			tempPatch->IsMarked = true;
			ArrayBefore.push_back(tempPatch);
			Sleep(100);
		}
	}
}