axmol/cocos/2d/CCTMXLayer.h

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

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****************************************************************************/
#ifndef __CCTMX_LAYER_H__
#define __CCTMX_LAYER_H__

#include "2d/CCSpriteBatchNode.h"
#include "2d/CCTMXXMLParser.h"
#include "base/ccCArray.h"
NS_CC_BEGIN

class TMXMapInfo;
class TMXLayerInfo;
class TMXTilesetInfo;
struct _ccCArray;

/**
 * @addtogroup _2d
 * @{
 */

/** @brief TMXLayer represents the TMX layer.
 * It is a subclass of SpriteBatchNode. By default the tiles are rendered using a TextureAtlas.
 * If you modify a tile on runtime, then, that tile will become a Sprite, otherwise no Sprite objects are created.
 * The benefits of using Sprite objects as tiles are:
 * - tiles (Sprite) can be rotated/scaled/moved with a nice API.
 * If the layer contains a property named "cc_vertexz" with an integer (in can be positive or negative),
 * then all the tiles belonging to the layer will use that value as their OpenGL vertex Z for depth.
 * On the other hand, if the "cc_vertexz" property has the "automatic" value, then the tiles will use an automatic vertex Z value.
 * Also before drawing the tiles, GL_ALPHA_TEST will be enabled, and disabled after drawing them. The used alpha func will be:
 * glAlphaFunc( GL_GREATER, value ).
 * "value" by default is 0, but you can change it from Tiled by adding the "cc_alpha_func" property to the layer.
 * The value 0 should work for most cases, but if you have tiles that are semi-transparent, then you might want to use a different
 * value, like 0.5.
 * For further information, please see the programming guide:
 * http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:tiled_maps
 * @since v0.8.1
 * Tiles can have tile flags for additional properties. At the moment only flip horizontal and flip vertical are used. These bit flags are defined in TMXXMLParser.h.
 * @since 1.1
 */

class CC_DLL TMXLayer : public SpriteBatchNode
{
public:
    /** Creates a TMXLayer with an tileset info, a layer info and a map info.
     *
     * @param tilesetInfo An tileset info.
     * @param layerInfo A layer info.
     * @param mapInfo A map info.
     * @return An autorelease object.
     */
    static TMXLayer * create(TMXTilesetInfo *tilesetInfo, TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo);
    /**
     * @js ctor
     */
    TMXLayer();
    /**
     * @js NA
     * @lua NA
     */
    virtual ~TMXLayer();

    /** Initializes a TMXLayer with a tileset info, a layer info and a map info.
     *
     * @param tilesetInfo An tileset info.
     * @param layerInfo A layer info.
     * @param mapInfo A map info.
     * @return If initializes successfully, it will return true.
     */
    bool initWithTilesetInfo(TMXTilesetInfo *tilesetInfo, TMXLayerInfo *layerInfo, TMXMapInfo *mapInfo);

    /** Dealloc the map that contains the tile position from memory.
     * Unless you want to know at runtime the tiles positions, you can safely call this method.
     * If you are going to call layer->tileGIDAt() then, don't release the map.
     */
    void releaseMap();

    /** Returns the tile (Sprite) at a given a tile coordinate.
     * The returned Sprite will be already added to the TMXLayer. Don't add it again.
     * The Sprite can be treated like any other Sprite: rotated, scaled, translated, opacity, color, etc.
     * You can remove either by calling:
     * - layer->removeChild(sprite, cleanup);
     * - or layer->removeTileAt(Vec2(x,y));
     *
     * @param tileCoordinate A tile coordinate.
     * @return Returns the tile (Sprite) at a given a tile coordinate.
     */
    Sprite* getTileAt(const Vec2& tileCoordinate);
    
    /** Returns the tile gid at a given tile coordinate. It also returns the tile flags.
     * This method requires the tile map has not been previously released (eg. don't call [layer releaseMap]).
     * 
     * @param tileCoordinate The tile coordinate.
     * @param flags Tile flags.
     * @return Returns the tile gid at a given tile coordinate. It also returns the tile flags.
     */
	uint32_t getTileGIDAt(const Vec2& tileCoordinate, TMXTileFlags* flags = nullptr);

    /** Sets the tile gid (gid = tile global id) at a given tile coordinate.
     * The Tile GID can be obtained by using the method "tileGIDAt" or by using the TMX editor -> Tileset Mgr +1.
     * If a tile is already placed at that position, then it will be removed.
     *
     * @param gid The tile gid.
     * @param tileCoordinate The tile coordinate.
     */
    void setTileGID(uint32_t gid, const Vec2& tileCoordinate);

    /** Sets the tile gid (gid = tile global id) at a given tile coordinate.
     * The Tile GID can be obtained by using the method "tileGIDAt" or by using the TMX editor -> Tileset Mgr +1.
     * If a tile is already placed at that position, then it will be removed.
     * Use withFlags if the tile flags need to be changed as well.
     * 
     * @param gid The tile gid.
     * @param tileCoordinate The tile coordinate.
     * @param flags The tile flags.
     */

    void setTileGID(uint32_t gid, const Vec2& tileCoordinate, TMXTileFlags flags);

    /** Removes a tile at given tile coordinate. 
     *
     * @param tileCoordinate The tile coordinate.
     */
    void removeTileAt(const Vec2& tileCoordinate);

    /** Returns the position in points of a given tile coordinate.
     *
     * @param tileCoordinate The tile coordinate.
     * @return The position in points of a given tile coordinate.
     */
	Vec2 getPositionAt(const Vec2& tileCoordinate);

    /** Return the value for the specific property name.
     *
     * @param propertyName The specific property name.
     * @return Return the value for the specific property name.
     */
	Value getProperty(const std::string& propertyName) const;

    /** Creates the tiles. */
    void setupTiles();
    
    /** Get the layer name. 
     *
     * @return The layer name.
     */
    const std::string& getLayerName() { return _layerName; }
    
    /** Set the layer name.
     *
     * @param layerName The layer name.
     */
    void setLayerName(const std::string& layerName) { _layerName = layerName; }

    /** Size of the layer in tiles.
     *
     * @return Size of the layer in tiles.
     */
    const Size& getLayerSize() const { return _layerSize; }
    
    /** Set size of the layer in tiles.
     *
     * @param size Size of the layer in tiles.
     */
    void setLayerSize(const Size& size) { _layerSize = size; }
    
    /** Size of the map's tile (could be different from the tile's size).
     *
     * @return The size of the map's tile.
     */
    const Size& getMapTileSize() const { return _mapTileSize; }
    
    /** Set the size of the map's tile.
     *
     * @param size The size of the map's tile.
     */
    void setMapTileSize(const Size& size) { _mapTileSize = size; }
    
    /** Pointer to the map of tiles.
     * @js NA
     * @lua NA
     * @return Pointer to the map of tiles.
     */
    uint32_t* getTiles() const { return _tiles; };
    
    /** Set a pointer to the map of tiles.
     *
     * @param tiles A pointer to the map of tiles.
     */
    void setTiles(uint32_t* tiles) { _tiles = tiles; };
    
    /** Tileset information for the layer. 
     *
     * @return Tileset information for the layer.
     */
    TMXTilesetInfo* getTileSet() const { return _tileSet; }
    
    /** Set tileset information for the layer.
     *
     * @param info The tileset information for the layer.
     * @js NA
     */
    void setTileSet(TMXTilesetInfo* info) {
        CC_SAFE_RETAIN(info);
        CC_SAFE_RELEASE(_tileSet);
        _tileSet = info;
    }
    
    /** Layer orientation, which is the same as the map orientation.
     *
     * @return Layer orientation, which is the same as the map orientation.
     */
    int getLayerOrientation() const { return _layerOrientation; }
    
    /** Set layer orientation, which is the same as the map orientation.
     *
     * @param orientation Layer orientation,which is the same as the map orientation.
     */
    void setLayerOrientation(int orientation) { _layerOrientation = orientation; }
    
    /** Properties from the layer. They can be added using Tiled.
     *
     * @return Properties from the layer. They can be added using Tiled.
     */
    const ValueMap& getProperties() const { return _properties; }
    
    /** Properties from the layer. They can be added using Tiled.
     *
     * @return Properties from the layer. They can be added using Tiled.
     */
    ValueMap& getProperties() { return _properties; }
    
    /** Set an Properties from to layer.
     *
     * @param properties It is used to set the layer Properties.
     */
    void setProperties(const ValueMap& properties) {
        _properties = properties;
    }
    //
    // Override
    //
    /** TMXLayer doesn't support adding a Sprite manually.
     @warning addChild(z, tag); is not supported on TMXLayer. Instead of setTileGID.
     */
    using SpriteBatchNode::addChild;
    virtual void addChild(Node * child, int zOrder, int tag) override;
    // super method
    void removeChild(Node* child, bool cleanup) override;
    /**
    * @js NA
    */
    virtual std::string getDescription() const override;

protected:
    Vec2 getPositionForIsoAt(const Vec2& pos);
    Vec2 getPositionForOrthoAt(const Vec2& pos);
    Vec2 getPositionForHexAt(const Vec2& pos);
    Vec2 getPositionForStaggeredAt(const Vec2& pos);
    Vec2 calculateLayerOffset(const Vec2& offset);

    /* optimization methods */
    Sprite* appendTileForGID(uint32_t gid, const Vec2& pos);
    Sprite* insertTileForGID(uint32_t gid, const Vec2& pos);
    Sprite* updateTileForGID(uint32_t gid, const Vec2& pos);

    intptr_t getZForPos(const Vec2& pos) const;

    /* The layer recognizes some special properties, like cc_vertexz */
    void parseInternalProperties();
    void setupTileSprite(Sprite* sprite, const Vec2& pos, uint32_t gid);
    Sprite* reusedTileWithRect(const Rect& rect);
    int getVertexZForPos(const Vec2& pos);

    // index
    ssize_t atlasIndexForExistantZ(int z);
    ssize_t atlasIndexForNewZ(int z);


    //! name of the layer
    std::string _layerName;
    //! TMX Layer supports opacity
    unsigned char _opacity;
    
    //! Only used when vertexZ is used
    int _vertexZvalue;
    bool _useAutomaticVertexZ;

    //! used for optimization
    Sprite *_reusedTile;
    ccCArray *_atlasIndexArray;
    
    // used for retina display
    float _contentScaleFactor;
    
    /** size of the layer in tiles */
    Size _layerSize;
    /** size of the map's tile (could be different from the tile's size) */
    Size _mapTileSize;
    /** pointer to the map of tiles */
    uint32_t* _tiles;
    /** Tileset information for the layer */
    TMXTilesetInfo* _tileSet;
    /** Layer orientation, which is the same as the map orientation */
    int _layerOrientation;
    /** Stagger Axis */
    int _staggerAxis;
    /** Stagger Index */
    int _staggerIndex;
    /** Hex side length*/
    int _hexSideLength;
    /** properties from the layer. They can be added using Tiled */
    ValueMap _properties;
};

// end of tilemap_parallax_nodes group
/** @} */

NS_CC_END

#endif //__CCTMX_LAYER_H__