Ios 将等轴测平铺贴图坐标转换为屏幕坐标

我正在尝试将等距平铺坐标转换为屏幕坐标。 我似乎有问题，尤其是Y坐标，看起来X部分工作得很好。这是我到目前为止得到的

// calculate screen coordinates from tile coordinates

- (CGPoint)positionForTileCoord:(CGPoint)pos {

float halfMapWidth = _tileMap.mapSize.width*0.5;
float mapHeight = _tileMap.mapSize.height;
float tileWidth = _tileMap.tileSize.width;
float tileHeight = _tileMap.tileSize.height;


int x = halfMapWidth*tileWidth + tileWidth*pos.x*0.5-tileWidth*pos.y*0.5;

int y =  ............


return ccp(x, y);

我的播放器作为一个子添加到平铺贴图本身，贴图以screenSize.x/2，scrensize.y/2的形式添加到图层，锚定点为0.5

我已经成功地用正交贴图做了同样的事情，但似乎在用等距贴图

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谢谢你

真的是这样的：

int y = (pos.y + (mapHeight * tileWidth/2) - (tileHeight/2)) - ((pos.y + pos.x) *   tileHeight/2) + tileHeight;

  // calculate screen coordinates from tile coordinates
    - (CGPoint)positionForTileCoord:(CGPoint)pos {

        float halfMapWidth = _tileMap.mapSize.width*0.5;
        float mapHeight = _tileMap.mapSize.height;
        float tileWidth = _tileMap.tileSize.width;
        float tileHeight = _tileMap.tileSize.height;


        int x = halfMapWidth*tileWidth + tileWidth*pos.x*0.5-tileWidth*pos.y*0.5;

        int y = (pos.y + (mapHeight * tileWidth/2) - (tileHeight/2)) - ((pos.y + pos.x) *   tileHeight/2) + tileHeight;   

        return ccp(x, y);
    }


    // calculating the tile coordinates from screen location
    -(CGPoint) tilePosFromLocation:(CGPoint)location
    {
        CGPoint pos = location;
        float halfMapWidth = _tileMap.mapSize.width*0.5;
        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 invereseTileY = mapHeight - tilePosDiv.y;

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

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

        return CGPointMake(posX, posY);
    }

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实际上，它看起来是这样的：

  // calculate screen coordinates from tile coordinates
    - (CGPoint)positionForTileCoord:(CGPoint)pos {

        float halfMapWidth = _tileMap.mapSize.width*0.5;
        float mapHeight = _tileMap.mapSize.height;
        float tileWidth = _tileMap.tileSize.width;
        float tileHeight = _tileMap.tileSize.height;


        int x = halfMapWidth*tileWidth + tileWidth*pos.x*0.5-tileWidth*pos.y*0.5;

        int y = (pos.y + (mapHeight * tileWidth/2) - (tileHeight/2)) - ((pos.y + pos.x) *   tileHeight/2) + tileHeight;   

        return ccp(x, y);
    }


    // calculating the tile coordinates from screen location
    -(CGPoint) tilePosFromLocation:(CGPoint)location
    {
        CGPoint pos = location;
        float halfMapWidth = _tileMap.mapSize.width*0.5;
        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 invereseTileY = mapHeight - tilePosDiv.y;

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

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

        return CGPointMake(posX, posY);
    }

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在纸上画画来组织你的思维——通常是有帮助的。在纸上画画来组织你的思维——通常是有帮助的。