void TMXLayer::draw(Renderer *renderer, const Mat4& transform, uint32_t flags)
{
updateTotalQuads();
if( flags != 0 || _dirty || _quadsDirty )
{
Size s = Director::getInstance()->getWinSize();
auto rect = Rect(0, 0, s.width, s.height);
Mat4 inv = transform;
inv.inverse();
rect = RectApplyTransform(rect, inv);
updateTiles(rect);
updateIndexBuffer();
updatePrimitives();
_dirty = false;
}
if(_renderCommands.size() < static_cast<size_t>(_primitives.size()))
{
_renderCommands.resize(_primitives.size());
}
_texture->prepareDraw();
int index = 0;
for(const auto& iter : _primitives)
{
if(iter.second->getCount() > 0)
{
auto& cmd = _renderCommands[index++];
//修改混合模式，满足美术需求和PS一样 added by tokentong 20150327
cmd.init(iter.first, _texture->getName(), getGLProgramState(), BlendFunc::ALPHA_PREMULTIPLIED, iter.second, _modelViewTransform, flags);
renderer->addCommand(&cmd);
}
}
}
static Rect getRect(Node * pNode)
{
Size contentSize = pNode->getContentSize();
Rect rect = Rect(0, 0, contentSize.width, contentSize.height);
return RectApplyTransform(rect, pNode->getNodeToWorldTransform());
}
void TMXLayer::updateTiles(const Rect& culledRect)
{
Rect visibleTiles = culledRect;
Size mapTileSize = CC_SIZE_PIXELS_TO_POINTS(_mapTileSize);
Size tileSize = CC_SIZE_PIXELS_TO_POINTS(_tileSet->_tileSize);
Mat4 nodeToTileTransform = _tileToNodeTransform.getInversed();
//transform to tile
visibleTiles = RectApplyTransform(visibleTiles, nodeToTileTransform);
// tile coordinate is upside-down, so we need to make the tile coordinate use top-left for the start point.
visibleTiles.origin.y += 1;
// if x=0.7, width=9.5, we need to draw number 0~10 of tiles, and so is height.
visibleTiles.size.width = ceil(visibleTiles.origin.x + visibleTiles.size.width) - floor(visibleTiles.origin.x);
visibleTiles.size.height = ceil(visibleTiles.origin.y + visibleTiles.size.height) - floor(visibleTiles.origin.y);
visibleTiles.origin.x = floor(visibleTiles.origin.x);
visibleTiles.origin.y = floor(visibleTiles.origin.y);
// for the bigger tiles.
int tilesOverX = 0;
int tilesOverY = 0;
// for diagonal oriention tiles
float tileSizeMax = std::max(tileSize.width, tileSize.height);
if (_layerOrientation == FAST_TMX_ORIENTATION_ORTHO)
{
tilesOverX = ceil(tileSizeMax / mapTileSize.width) - 1;
tilesOverY = ceil(tileSizeMax / mapTileSize.height) - 1;
if (tilesOverX < 0) tilesOverX = 0;
if (tilesOverY < 0) tilesOverY = 0;
}
else if(_layerOrientation == FAST_TMX_ORIENTATION_ISO)
{
Rect overTileRect(0, 0, tileSizeMax - mapTileSize.width, tileSizeMax - mapTileSize.height);
if (overTileRect.size.width < 0) overTileRect.size.width = 0;
if (overTileRect.size.height < 0) overTileRect.size.height = 0;
overTileRect = RectApplyTransform(overTileRect, nodeToTileTransform);
tilesOverX = ceil(overTileRect.origin.x + overTileRect.size.width) - floor(overTileRect.origin.x);
tilesOverY = ceil(overTileRect.origin.y + overTileRect.size.height) - floor(overTileRect.origin.y);
}
else
{
//do nothing, do not support
//CCASSERT(0, "TMX invalid value");
}
_indicesVertexZNumber.clear();
for(const auto& iter : _indicesVertexZOffsets)
{
_indicesVertexZNumber[iter.first] = iter.second;
}
int yBegin = std::max(0.f,visibleTiles.origin.y - tilesOverY);
int yEnd = std::min(_layerSize.height,visibleTiles.origin.y + visibleTiles.size.height + tilesOverY);
int xBegin = std::max(0.f,visibleTiles.origin.x - tilesOverX);
int xEnd = std::min(_layerSize.width,visibleTiles.origin.x + visibleTiles.size.width + tilesOverX);
for (int y = yBegin; y < yEnd; ++y)
{
for (int x = xBegin; x < xEnd; ++x)
{
int tileIndex = getTileIndexByPos(x, y);
if(_tiles[tileIndex] == 0) continue;
int vertexZ = getVertexZForPos(Vec2(x,y));
auto iter = _indicesVertexZNumber.find(vertexZ);
int offset = iter->second;
iter->second++;
int quadIndex = _tileToQuadIndex[tileIndex];
CC_ASSERT(-1 != quadIndex);
(*_indices)[6 * offset + 0] = quadIndex * 4 + 0; //[CY MOD]
(*_indices)[6 * offset + 1] = quadIndex * 4 + 1; //[CY MOD]
(*_indices)[6 * offset + 2] = quadIndex * 4 + 2; //[CY MOD]
(*_indices)[6 * offset + 3] = quadIndex * 4 + 3; //[CY MOD]
(*_indices)[6 * offset + 4] = quadIndex * 4 + 2; //[CY MOD]
(*_indices)[6 * offset + 5] = quadIndex * 4 + 1; //[CY MOD]
} // for x
} // for y
for(const auto& iter : _indicesVertexZOffsets)
{
_indicesVertexZNumber[iter.first] -= iter.second;
if(_indicesVertexZNumber[iter.first] == 0)
{
_indicesVertexZNumber.erase(iter.first);
}
}
}
