void GameLayer::updateGround(float dt) {
CCSprite *groundSp1 = (CCSprite *)mGrounds->objectAtIndex(0);
CCSprite *groundSp2 = (CCSprite *)mGrounds->objectAtIndex(1);
groundSp1->setPositionX(groundSp1->getPositionX() - getGroundSpeed());
groundSp2->setPositionX(groundSp2->getPositionX() - getGroundSpeed());
if (groundSp1->getPositionX() < -groundSp1->getContentSize().width) {
groundSp1->setPositionX(groundSp2->getPositionX() + groundSp2->getContentSize().width);
mGrounds->exchangeObject(groundSp1, groundSp2);
}
}
void GameLayer::updateCollisions(float dt) {
if (!mCollisionArray->count()) {
return;
}
for (int i=0; i<mCollisionArray->count(); ++i) {
BarPipe *pBarPipe = (BarPipe *)mCollisionArray->objectAtIndex(i);
pBarPipe->setBarPositionX(pBarPipe->getBarPositionX() - getGroundSpeed());
}
/**
检测第一个是否出界, 如是
1.改变它的位置
2.把第一个放到最后一个
**/
BarPipe *pFirstBarPipe = (BarPipe *)mCollisionArray->objectAtIndex(0);
if (pFirstBarPipe->getBarPositionX() < -pFirstBarPipe->getSize().width) {
BarPipe *pLastBarPipe = (BarPipe *)mCollisionArray->lastObject();
float firstX = pLastBarPipe->getBarPositionX() + BarPipe::getSize().width + INTERVAL_COLLISION;
pFirstBarPipe->setBarPositionX(firstX);
pFirstBarPipe->setRandomY();
pFirstBarPipe->setIsPassed(false);
CC_SAFE_RETAIN(pFirstBarPipe);
mCollisionArray->removeObjectAtIndex(0);
mCollisionArray->addObject(pFirstBarPipe);
CC_SAFE_RELEASE(pFirstBarPipe);
}
}
//------------------------------------------------------------------------------
// weaponDynamics -- default dynamics; using Robot Aircraft (RAC) dynamics
//------------------------------------------------------------------------------
void Effects::weaponDynamics(const LCreal dt)
{
// Useful constant
static const LCreal g = ETHG * Basic::Distance::FT2M; // Acceleration of Gravity (m/s/s)
// ---
// Compute & Set acceleration vector (earth)
// ---
// First drag
osg::Vec3 tmp = getVelocity() * (-dragIndex);
// then gravity
osg::Vec3 ae1 = tmp;
ae1[IDOWN] += g;
setAcceleration(ae1);
// ---
// Comute & set new velocity vectory (earth)
// ---
osg::Vec3 ve1 = getVelocity() + (ae1 * dt);
setVelocity(ve1);
// ---
// .. Only after setVelocity has been called ...
// ---
LCreal vp = getTotalVelocity();
LCreal vg = getGroundSpeed();
// ---
// Set velocity vector (body)
// (total velocity is along X)
// ---
setVelocityBody(vp, 0.0, 0.0);
// ---
// Sent angular values
// ---
LCreal newPsi = lcAtan2(ve1[IEAST],ve1[INORTH]);
LCreal newTheta = lcAtan2( -ve1[IDOWN], vg );
setEulerAngles(0.0, newTheta, newPsi);
setAngularVelocities(0.0, 0.0, 0.0);
}
