《Learn iPhone and iPad Cocos2D Game Development》

1. 根据触摸点的坐标返回瓦片坐标。

//根据触摸点的位置计算瓦片坐标-(CGPoint) tilePosFromLocation:(CGPoint)location tileMap:(CCTMXTiledMap*)tileMap{// Tilemap position must be subtracted, in case the tilemap position is scrolling// 考虑瓦片地图滚动的情况，要减去当前位置CGPoint pos = ccpSub(location, tileMap.position);float halfMapWidth = tileMap.mapSize.width * 0.5f;　　//地图宽*0.5float mapHeight = tileMap.mapSize.height;            //地图高float tileWidth = tileMap.tileSize.width;            //瓦片宽float tileHeight = tileMap.tileSize.height;          //瓦片高CGPoint tilePosDiv = CGPointMake(pos.x / tileWidth, pos.y / tileHeight);float inverseTileY = mapHeight - tilePosDiv.y;// Cast to int makes sure that result is in whole numbersfloat posX = (int)(inverseTileY + tilePosDiv.x - halfMapWidth);float posY = (int)(inverseTileY - tilePosDiv.x + halfMapWidth);// make sure coordinates are within isomap boundsposX = MAX(0, posX);posX = MIN(tileMap.mapSize.width - 1, posX);posY = MAX(0, posY);posY = MIN(tileMap.mapSize.height - 1, posY);return CGPointMake(posX, posY);}

　　

 

 

Calculating the Tile Coordinates from a Touch Location

-(CGPoint) tilePosFromLocation:(CGPoint)location tileMap:(CCTMXTiledMap*)tileMap

{

// Tilemap position must be subtracted, in case the tilemap position is

scrolling

CGPoint pos = ccpSub(location, tileMap.position);

float halfMapWidth = tileMap.mapSize.width * 0.5f;

float mapHeight = tileMap.mapSize.height;

float tileWidth = tileMap.tileSize.width;

float tileHeight = tileMap.tileSize.height;

CGPoint tilePosDiv = CGPointMake(pos.x / tileWidth, pos.y / tileHeight);

float inverseTileY = mapHeight - tilePosDiv.y;

// Cast to int makes sure that result is in whole numbers

float posX = (int)(inverseTileY + tilePosDiv.x - halfMapWidth);

float posY = (int)(inverseTileY - tilePosDiv.x + halfMapWidth);

// make sure coordinates are within isomap bounds

posX = MAX(0, posX);

posX = MIN(tileMap.mapSize.width - 1, posX);

posY = MAX(0, posY);

posY = MIN(tileMap.mapSize.height - 1, posY);

return CGPointMake(posX, posY);

}