根据触摸点的坐标返回瓦片坐标 Locating an Isometric Tile

　　《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*0.5
float 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 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);
}

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);
}

根据触摸点的坐标返回瓦片坐标 Locating an Isometric Tile

原文：http://www.cnblogs.com/xiaosafeimao/p/4993377.html