void HelloWorld::tick(float dt) {
int velocityIterations = 8;
int positionIterations = 1;
m_world->Step(dt, velocityIterations, positionIterations);
for (b2Body* b = m_world->GetBodyList(); b; b = b->GetNext()) {
if (b->GetUserData() != NULL) {
CCSprite* sprite = (CCSprite*)(b->GetUserData());
sprite->setPosition(ccp(b->GetPosition().x * PTM_RATIO, b->GetPosition().y * PTM_RATIO));
sprite->setRotation( -1 * CC_RADIANS_TO_DEGREES(b->GetAngle()));
}
}
if (m_releasingArm && m_bulletJoint != NULL) {
if (m_armJoint->GetJointAngle() <= CC_DEGREES_TO_RADIANS(10)) {
m_releasingArm = false;
m_world->DestroyJoint(m_bulletJoint);
m_bulletJoint = NULL;
CCDelayTime* delayAction = CCDelayTime::create(5.0f);
CCCallFunc* callSelectorAction = CCCallFunc::create(this, callfunc_selector(HelloWorld::resetBullet));
this->runAction(CCSequence::create(delayAction, callSelectorAction, NULL));
}
}
if (m_bulletBody && m_bulletJoint == NULL) {
b2Vec2 position = m_bulletBody->GetPosition();
CCPoint myPosition = this->getPosition();
CCSize screenSize = CCDirector::sharedDirector()->getWinSize();
if (position.x > screenSize.width/2.0f/PTM_RATIO) {
myPosition.x = -MIN(screenSize.width*2.0f - screenSize.width,
position.x*PTM_RATIO - screenSize.width/2.0f);
this->setPosition(myPosition);
}
}
std::set<b2Body*>::iterator pos;
for (pos = contactListener->contacts.begin(); pos != contactListener->contacts.end(); ++pos) {
b2Body* body = *pos;
for (vector<b2Body*>::iterator iter = targets->begin(); iter != targets->end(); ++iter) {
if (body == *iter) {
iter = targets->erase(iter);
break;
}
}
for (vector<b2Body*>::iterator iter = enemies->begin(); iter != enemies->end(); ++iter) {
if (body == *iter) {
iter = enemies->erase(iter);
break;
}
}
CCNode* contactNode = (CCNode*)body->GetUserData();
CCPoint position = contactNode->getPosition();
removeChild(contactNode, true);
m_world->DestroyBody(body);
CCParticleSun *explosion = CCParticleSun::create();
explosion->retain();
explosion->setTexture(CCTextureCache::sharedTextureCache()->addImage("fire.png"));
// explosion->initWithTotalParticles(200);
explosion->setAutoRemoveOnFinish(true);
explosion->setStartSizeVar(10.0f);
explosion->setSpeed(70.0f);
explosion->setAnchorPoint(ccp(0.5f, 0.5f));
explosion->setPosition(position);
explosion->setDuration(1.0f);
addChild(explosion, 11);
explosion->release();
}
contactListener->contacts.clear();
}
void HelloWorld::tick(ccTime dt)
{
int velocityIterations = 8;
int positionIterations = 1;
m_pWorld->Step(dt, velocityIterations, positionIterations);
//更新位置和角度
for (b2Body* b = m_pWorld->GetBodyList(); b; b = b->GetNext())
{
if (b->GetUserData() != NULL)
{
CCSprite * actor = (CCSprite*)b->GetUserData();
actor->setPosition(ccp(b->GetPosition().x*PTM_RATIO,b->GetPosition().y*PTM_RATIO));
actor->setRotation(-1*CC_RADIANS_TO_DEGREES(b->GetAngle()));
}
}
//发射子弹
if(m_bReleaseArm && m_pBulletJoint != NULL)
{
if(m_pArmJoin->GetJointAngle() <= CC_DEGREES_TO_RADIANS(10))//差不多回到原始位置再发射子弹
{
m_bReleaseArm = false;
m_pWorld->DestroyJoint(m_pBulletJoint);
m_pBulletJoint = NULL;
CCDelayTime *delayAction = CCDelayTime::actionWithDuration(5.0f);
CCCallFunc *callSelectorAction = CCCallFunc::actionWithTarget(this, callfunc_selector(HelloWorld::resetBullet));
this->runAction(CCSequence::actions(delayAction, callSelectorAction, NULL));
}
}
//镜头跟随
if(m_pBulletBody && m_pBulletJoint == NULL)
{
b2Vec2 position = m_pBulletBody->GetPosition();
CCPoint myPosition = this->getPosition();
CCSize screenSize = CCDirector::sharedDirector()->getWinSize();
if(position.x > screenSize.width/2.0f/PTM_RATIO)
{
myPosition.x = -min(screenSize.width, position.x*PTM_RATIO);
this->setPosition(myPosition);
}
}
//消灭敌人
std::set<b2Body*>::iterator pos;
for(pos = m_pListener->contracts.begin();pos != m_pListener->contracts.end();)
{
b2Body * body = *pos;
CCSprite * enemy = (CCSprite*)body->GetUserData();
//爆炸效果
CCPoint position = ccp(body->GetWorldCenter().x*PTM_RATIO,body->GetWorldCenter().y*PTM_RATIO);
CCParticleSun *explosion = CCParticleSun::node();
explosion->retain();
explosion->setTexture(CCTextureCache::sharedTextureCache()->addImage("fire.png"));
explosion->initWithTotalParticles(20);
explosion->setIsAutoRemoveOnFinish(true);
explosion->setStartSizeVar(10.0f);
explosion->setSpeed(70.0f);
explosion->setAnchorPoint(ccp(0.5f, 0.5f));
explosion->setPosition(position);
explosion->setDuration(1.0f);
addChild(explosion, 11);
explosion->release();
//移除
this->removeChild(enemy, true);
m_pWorld->DestroyBody(body);
body = NULL;
m_pListener->contracts.erase(*pos);
pos++;
}
}