C++ CCSprite::getAtlasIndex方法代码示例

	unsigned int CCSpriteBatchNode::atlasIndexForChild(CCSprite *pobSprite, int nZ)
	{
		NSMutableArray<CCNode*> *pBrothers = pobSprite->getParent()->getChildren();
		unsigned int uChildIndex = pBrothers->getIndexOfObject(pobSprite);

		// ignore parent Z if parent is spriteSheet
		bool bIgnoreParent = (CCSpriteBatchNode*)(pobSprite->getParent()) == this;
		CCSprite *pPrevious = NULL;
		if (uChildIndex > 0)
		{
			pPrevious = (CCSprite*)(pBrothers->getObjectAtIndex(uChildIndex - 1));
		}

		// first child of the sprite sheet
		if (bIgnoreParent)
		{
			if (uChildIndex == 0)
			{
				return 0;
			}

			return highestAtlasIndexInChild(pPrevious) + 1;
		}

		// parent is a CCSprite, so, it must be taken into account

		// first child of an CCSprite ?
		if (uChildIndex == 0)
		{
			CCSprite *p = (CCSprite*)(pobSprite->getParent());

			// less than parent and brothers
			if (nZ < 0)
			{
				return p->getAtlasIndex();
			}
			else
			{
				return p->getAtlasIndex() + 1;
			}
		}
		else
		{
			// previous & sprite belong to the same branch
			if ((pPrevious->getZOrder() < 0 && nZ < 0) || (pPrevious->getZOrder() >= 0 && nZ >= 0))
			{
				return highestAtlasIndexInChild(pPrevious) + 1;
			}

			// else (previous < 0 and sprite >= 0 )
			CCSprite *p = (CCSprite*)(pobSprite->getParent());
			return p->getAtlasIndex() + 1;
		}

		// Should not happen. Error calculating Z on SpriteSheet
		assert(0);
		return 0;
	}

	// CCTMXLayer - adding helper methods
	CCSprite * CCTMXLayer::insertTileForGID(unsigned int gid, const CCPoint& pos)
	{
		CCRect rect = m_pTileSet->rectForGID(gid);
                rect = CCRectMake(rect.origin.x / m_fContentScaleFactor, rect.origin.y / m_fContentScaleFactor, rect.size.width/ m_fContentScaleFactor, rect.size.height/ m_fContentScaleFactor);

		int z = (int)(pos.x + pos.y * m_tLayerSize.width);

		if( ! m_pReusedTile )
		{
			m_pReusedTile = new CCSprite();
			m_pReusedTile->initWithBatchNode(this, rect);
		}
		else
		{
			m_pReusedTile->initWithBatchNode(this, rect);
		}
		m_pReusedTile->setPositionInPixels(positionAt(pos));
		m_pReusedTile->setVertexZ((float)vertexZForPos(pos));
		m_pReusedTile->setAnchorPoint(CCPointZero);
		m_pReusedTile->setOpacity(m_cOpacity);

		// get atlas index
		unsigned int indexForZ = atlasIndexForNewZ(z);

		// Optimization: add the quad without adding a child
		this->addQuadFromSprite(m_pReusedTile, indexForZ);

		// insert it into the local atlasindex array
		ccCArrayInsertValueAtIndex(m_pAtlasIndexArray, (void*)z, indexForZ);

		// update possible children
		if (m_pChildren && m_pChildren->count()>0)
		{
            CCObject* pObject = NULL;
            CCARRAY_FOREACH(m_pChildren, pObject)
            {
                CCSprite* pChild = (CCSprite*) pObject;
                if (pChild)
                {
                    unsigned int ai = pChild->getAtlasIndex();
                    if ( ai >= indexForZ )
                    {
                        pChild->setAtlasIndex(ai+1);
                    }
                }
            }

	void CCSpriteBatchNode::removeSpriteFromAtlas(CCSprite *pobSprite)
	{
		// remove from TextureAtlas
		m_pobTextureAtlas->removeQuadAtIndex(pobSprite->getAtlasIndex());

		// Cleanup sprite. It might be reused (issue #569)
		pobSprite->useSelfRender();

		unsigned int uIndex = m_pobDescendants->getIndexOfObject(pobSprite);
		if (uIndex != -1)
		{
			m_pobDescendants->removeObjectAtIndex(uIndex);

			// update all sprites beyond this one
			unsigned int count = m_pobDescendants->count();

			for(; uIndex < count; ++uIndex)
			{
				CCSprite* s = (CCSprite*)(m_pobDescendants->getObjectAtIndex(uIndex));
				s->setAtlasIndex( s->getAtlasIndex() - 1 );
			}
		}

		// remove children recursively
		NSMutableArray<CCNode*> *pChildren = pobSprite->getChildren();
		if (pChildren && pChildren->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
			for (iter = pChildren->begin(); iter != pChildren->end(); ++iter)
			{
				pSprite = (CCSprite*)(*iter);

				if (! pSprite)
				{
					break;
				}

				removeSpriteFromAtlas(pSprite);
			}
		}
	}

// CCTMXLayer - adding helper methods
CCSprite * CCTMXLayer::insertTileForGID(unsigned int gid, const CCPoint& pos)
{
    CCRect rect = m_pTileSet->rectForGID(gid);
    rect = CC_RECT_PIXELS_TO_POINTS(rect);

    intptr_t z = (intptr_t)(pos.x + pos.y * m_tLayerSize.width);

	// if quad optimization is used
	CCSprite *tile;
	if(m_pAtlasIndexArray)
	{
		tile = reusedTileWithRect(rect);

		setupTileSprite(tile, pos, gid);

		// get atlas index
		unsigned int indexForZ = atlasIndexForNewZ(z);

		// Optimization: add the quad without adding a child
		this->insertQuadFromSprite(tile, indexForZ);

		// insert it into the local atlasindex array
		ccCArrayInsertValueAtIndex(m_pAtlasIndexArray, (void*)z, indexForZ);

		// update possible children
		if (m_pChildren && m_pChildren->count()>0)
		{
			CCObject* pObject = NULL;
			CCARRAY_FOREACH(m_pChildren, pObject)
			{
				CCSprite* pChild = (CCSprite*) pObject;
				if (pChild)
				{
					unsigned int ai = pChild->getAtlasIndex();
					if ( ai >= indexForZ )
					{
						pChild->setAtlasIndex(ai+1);
					}
				}
			}
		}