// Used with box2d style velocity (m/s where m = 32 pixels), but box2d is not required
void CCParallaxScrollNode::updateWithVelocity(Point vel, float dt)
{
vel = vel * PTM_RATIO;
for (int i = 0; i < _scrollOffsets.size(); i ++)
{
CCParallaxScrollOffset *scrollOffset = (CCParallaxScrollOffset*) _scrollOffsets.at(i);
Point relVel = scrollOffset->getRelVelocity() * PTM_RATIO;
Point totalVel = vel + relVel;
Point offset = ccpCompMult((totalVel * dt), scrollOffset->getRatio());
Node *child = scrollOffset->getTheChild();
child->setPosition(child->getPosition() + offset);
if ( (offset.x < 0 && child->getPosition().x + child->getContentSize().width < 0) ||
(offset.x > 0 && child->getPosition().x > _range.width) ) {
child->setPosition((child->getPosition() + Point(-SIGN(offset.x) * fabs(scrollOffset->getScrollOffset().x), 0)));
}
// Positive y indicates upward movement in cocos2d
if ( (offset.y < 0 && child->getPosition().y + child->getContentSize().height < 0) ||
(offset.y > 0 && child->getPosition().y > _range.height) ) {
child->setPosition((child->getPosition() + Point(0, -SIGN(offset.y) * fabs(scrollOffset->getScrollOffset().y))));
}
}
}
// Used with box2d style velocity (m/s where m = 32 pixels), but box2d is not required
void CCParallaxScrollNode::updateWithVelocity(CCPoint vel, float dt)
{
vel = ccpMult(vel, PTM_RATIO);
// CCLog("count: %i", _scrollOffsets->count());
CCObject* object;
CCARRAY_FOREACH(_scrollOffsets, object)
{
CCParallaxScrollOffset* scrollOffset = dynamic_cast<CCParallaxScrollOffset*>(object);
CCPoint relVel = ccpMult(scrollOffset->getRelVelocity(), PTM_RATIO);
CCPoint totalVel = ccpAdd(vel, relVel);
CCPoint offset = ccpCompMult(ccpMult(totalVel, dt), scrollOffset->getRatio());
CCNode *child = scrollOffset->getTheChild();
child->setPosition(ccpAdd(child->getPosition(), offset));
if ( (offset.x < 0 && child->getPosition().x + child->getContentSize().width < 0) ||
(offset.x > 0 && child->getPosition().x > _range.width) ) {
child->setPosition(ccpAdd(child->getPosition(), ccp(-SIGN(offset.x) * fabs(scrollOffset->getScrollOffset().x), 0)));
}
// Positive y indicates upward movement in cocos2d
if ( (offset.y < 0 && child->getPosition().y + child->getContentSize().height < 0) ||
(offset.y > 0 && child->getPosition().y > _range.height) ) {
child->setPosition(ccpAdd(child->getPosition(), ccp(0, -SIGN(offset.y) * fabs(scrollOffset->getScrollOffset().y))));
}
}
void CCParallaxScrollNode::updateWithYPosition(float y, float dt)
{
for (int i = 0; i < _scrollOffsets.size(); i ++)
{
CCParallaxScrollOffset *scrollOffset = (CCParallaxScrollOffset*) _scrollOffsets.at(i);
Node *child = scrollOffset->getTheChild();
float offset = y * scrollOffset->getRatio().y;
child->setPosition(Point(child->getPosition().x, scrollOffset->getOrigPosition().y + offset));
}
}
void CCParallaxScrollNode::removeChild(Sprite *node, bool cleanup)
{
cocos2d::Vector<CCParallaxScrollOffset *> tobeDeleted;
for (int i = 0; i < _scrollOffsets.size(); i ++)
{
CCParallaxScrollOffset *scrollOffset = (CCParallaxScrollOffset*) _scrollOffsets.at(i);
if( scrollOffset->getTheChild() == node){
tobeDeleted.pushBack(scrollOffset);
break;
}
}
for (int i = 0; i < tobeDeleted.size(); i ++)
{
_scrollOffsets.eraseObject(tobeDeleted.at(i));
}
}
