cocos2dx实现转盘旋转外加粒子效果

EllipseBy.h：

#ifndef _ELLIPSEBY_H_#define _ELLIPSEBY_H_#include "cocos2d.h"USING_NS_CC;#define PI 3.14159//椭圆的参数信息struct EllipseConfig {//椭圆a的长度float ellipseA;//椭圆b的长度float ellipseB;//椭圆的中心坐标Vec2 cenPos;//是否逆时针旋转bool isAntiClockwise;//目标开始旋转的位置，默认位置是在椭圆长轴右方,即值为0float startAngle;//目标自身的角度float selfAngle;};class EllipseBy : public ActionInterval{public:EllipseBy();~EllipseBy();//初始化函数，参数t为持续时间，config为椭圆参数static EllipseBy * create(float t,const EllipseConfig & config);bool initWithDuration(float t,const EllipseConfig & config);//每帧更新当前椭圆坐标virtual void update(float time) override;//在动作开始前调用virtual void startWithTarget(Node *target) override;//动作的拷贝virtual EllipseBy * clone() const override;//动作的逆序virtual EllipseBy * reverse() const override;protected://获得椭圆上当前点坐标inline Vec2 & getPosWithEllipse(float t){float angle = 2 * PI * ((m_config.isAntiClockwise ? t : (1 - t)) + m_config.startAngle / 360);return Vec2(m_config.ellipseA * cos(angle),m_config.ellipseB * sin(angle));}private:EllipseConfig m_config;};#endif

EllipseBy.cpp：

#include "EllipseBy.h"EllipseBy::EllipseBy(){}EllipseBy::~EllipseBy(){}EllipseBy * EllipseBy::create(float t,const EllipseConfig & config){auto pAction = new EllipseBy();if (pAction && pAction->initWithDuration(t,config)){pAction->autorelease();}else{CC_SAFE_DELETE(pAction);}return pAction;}bool EllipseBy::initWithDuration(float t,const EllipseConfig & config){if (!ActionInterval::initWithDuration(t)){return false;}m_config = config;return true;}EllipseBy * EllipseBy::clone() const{auto pAction = new EllipseBy();pAction->initWithDuration(_duration, m_config);pAction->autorelease();return pAction;}EllipseBy * EllipseBy::reverse() const{EllipseConfig resConfig = m_config;resConfig.isAntiClockwise = !m_config.isAntiClockwise;return EllipseBy::create(_duration, m_config);}void EllipseBy::startWithTarget(Node *target){ActionInterval::startWithTarget(target);}void EllipseBy::update(float time){if (_target){Vec2 curPos = this->getPosWithEllipse(time);float tmpAngle = m_config.selfAngle / 180 * PI;float newX = curPos.x * cos(tmpAngle) + curPos.y * sin(tmpAngle);float newY = curPos.y * cos(tmpAngle) - curPos.x * sin(tmpAngle);_target->setPosition(m_config.cenPos + Vec2(newX,newY));}}

LotteryTurnTest.h：

#ifndef _LOTTERY_TURN_TEST_H_#define _LOTTERY_TURN_TEST_H_#include "cocos2d.h"USING_NS_CC;class LotteryTurnTest : public cocos2d::Layer{public:LotteryTurnTest();~LotteryTurnTest();static cocos2d::Scene * create();virtual bool init();protected:void onBtnCallback(Ref * obj);void onTurnEnd();private:Sprite * m_turnBg;MenuItemSprite * m_turnArr;Sprite * m_pBg;ParticleSystemQuad * m_pElliRtt_1;ParticleSystemQuad * m_pElliRtt_2;ParticleSystemQuad * m_pCircle_1;ParticleSystemQuad * m_pCircle_2;};#endif

LotteryTurnTest.cpp：

#include "LotteryTurnTest.h"#include "EllipseBy.h"LotteryTurnTest::LotteryTurnTest(): m_turnBg(nullptr), m_turnArr(nullptr), m_pBg(nullptr), m_pElliRtt_1(nullptr), m_pElliRtt_2(nullptr), m_pCircle_1(nullptr), m_pCircle_2(nullptr){}LotteryTurnTest::~LotteryTurnTest(){}Scene * LotteryTurnTest::create(){auto scene = Scene::create();auto pLayer = new LotteryTurnTest();if (pLayer && pLayer->init()){pLayer->autorelease();scene->addChild(pLayer);return scene;}else{CC_SAFE_DELETE(pLayer);return NULL;}}bool LotteryTurnTest::init(){if (!Layer::init()){return false;}auto bgSize = Director::getInstance()->getWinSize();m_pBg = Sprite::create("LotteryTurn/bg_big.png");m_pBg->setPosition(Vec2(bgSize.width / 2,bgSize.height / 2));this->addChild(m_pBg);//添加标题auto plabel = Label::createWithTTF("LotteryTurnTest","fonts/Marker Felt.ttf",30);plabel->setPosition(Vec2(bgSize.width / 2,bgSize.height * 0.9));m_pBg->addChild(plabel);//添加转盘m_turnBg = Sprite::create("LotteryTurn/turn_bg.png");m_turnBg->setPosition(Vec2(bgSize.width / 2,bgSize.height / 2));m_pBg->addChild(m_turnBg);//添加指针auto arrNor = Sprite::create("LotteryTurn/turn_arrow.png");auto arrSel = Sprite::create("LotteryTurn/turn_arrow.png");arrSel->setColor(Color3B(190,190,190));m_turnArr = MenuItemSprite::create(arrNor,arrSel,CC_CALLBACK_1(LotteryTurnTest::onBtnCallback,this));m_turnArr->setPosition(Vec2(bgSize.width / 2,bgSize.height * 0.557));m_turnArr->setScale(0.7);auto pMenu = Menu::createWithItem(m_turnArr);pMenu->setPosition(Vec2::ZERO);m_pBg->addChild(pMenu);//添加中奖之后的简单界面auto awardLayer = LayerColor::create(Color4B(0,0,0,100));awardLayer->setPosition(Point::ZERO);awardLayer->setTag(100);m_pBg->addChild(awardLayer,10);awardLayer->setVisible(false);return true;}void LotteryTurnTest::onBtnCallback(Ref * obj){//防止多次点击m_turnArr->setEnabled(false);srand(unsigned(time(NULL)));float angleZ = rand() % 720 + 720;auto pAction = EaseExponentialOut::create(RotateBy::create(4,Vec3(0,0,angleZ)));m_turnBg->runAction(Sequence::create(pAction,CallFunc::create(CC_CALLBACK_0(LotteryTurnTest::onTurnEnd,this)),NULL));//添加椭圆旋转粒子效果m_pElliRtt_1 = ParticleSystemQuad::create("LotteryTurn/whiteBall.plist");m_pBg->addChild(m_pElliRtt_1);m_pElliRtt_2 = ParticleSystemQuad::create("LotteryTurn/yellowBall.plist");m_pBg->addChild(m_pElliRtt_2);//椭圆旋转EllipseConfig config;config.ellipseA = 100;config.ellipseB = 50;config.cenPos = m_turnBg->getPosition();config.isAntiClockwise = true;config.startAngle = 0;config.selfAngle = 45;m_pElliRtt_1->runAction(RepeatForever::create( EllipseBy::create(2.5,config)));config.startAngle = 180;config.selfAngle = -45;m_pElliRtt_2->runAction(RepeatForever::create(EllipseBy::create(2.5,config)));//圈圈闪烁粒子效果m_pCircle_1 = ParticleSystemQuad::create("LotteryTurn/bigCircle.plist");m_pCircle_1->setPosition(m_turnBg->getPosition());m_pBg->addChild(m_pCircle_1);m_pCircle_1->runAction(RepeatForever::create(RotateBy::create(5,Vec3(0,0,angleZ))));m_pCircle_2 = ParticleSystemQuad::create("LotteryTurn/smallCircle.plist");m_pCircle_2->setPosition(m_turnBg->getPosition());m_pBg->addChild(m_pCircle_2);m_pCircle_2->runAction(RepeatForever::create(RotateBy::create(5,Vec3(0,0,angleZ))));}void LotteryTurnTest::onTurnEnd(){m_pElliRtt_1->removeFromParentAndCleanup(true);m_pElliRtt_2->removeFromParentAndCleanup(true);m_pCircle_1->removeFromParentAndCleanup(true);m_pCircle_2->removeFromParentAndCleanup(true);//弹出抽中奖品((LayerColor *)m_pBg->getChildByTag(100))->setVisible(true);auto award = Sprite::create("LotteryTurn/award.png");award->setAnchorPoint(Vec2(0.5,0));award->setPosition(Vec2(m_pBg->getPositionX(),m_pBg->getPositionY() * 2));this->addChild(award);auto bounce = EaseBounceOut::create(MoveBy::create(2,Vec2(0,-m_pBg->getPositionX() * 2)));award->runAction(Sequence::createWithTwoActions(bounce,CallFuncN::create([=](Node * node){award->removeFromParentAndCleanup(true);((LayerColor *)m_pBg->getChildByTag(100))->setVisible(false);m_turnArr->setEnabled(true);})));}