C ++ WriteConsoleOutput显示问题

Question

我开始用c ++制作一个简单的游戏。

在此阶段，我将所有字符和属性（图块）存储在一个文件中，然后将其加载到CHAR_INFO中。然后使用WriteConsoleOutputA，我基本上可以绘制地图/世界。

一切似乎都正常工作，没有显示问题。然而，当我开始移动我的角色时，他正在弄乱瓷砖。这有点难以解释，所以这里有一个小视频。 http://www.youtube.com/watch?v=v5Be5qz30r8

如您所见，绿色瓷砖没有问题（前景和背景颜色相同）。但是，当我靠近灰色瓷砖时，它无法正常工作。

main.cpp片段......

int main()
{
    while (0 < 1)
    {

        if (GetAsyncKeyState(VK_UP) || GetAsyncKeyState(0x57))
            player.Move('u');
        if (GetAsyncKeyState(VK_DOWN) || GetAsyncKeyState(0x53))
            player.Move('d');
        if (GetAsyncKeyState(VK_LEFT) || GetAsyncKeyState(0x41))
            player.Move('l');
        if (GetAsyncKeyState(VK_RIGHT) || GetAsyncKeyState(0x44))
            player.Move('r');

        Sleep(100);
    }
}

Character class snippet

void Character::Move(char d)
{
    COORD oldLoc = loc;
    char walkableTiles[12] = {
        4, 179, 191, 192, 193, 194, 195, 196, 197, 217, 218, 255
    };

    //set character
        switch (d) 
    {
        case 'u' :
            loc.Y--;
            break;
        case 'd':
            loc.Y++;
            break;
        case 'l':
            loc.X--;
            break;
        case 'r':
            loc.X++;
            break;
    }

    //setup the buffer and location of tiles
    CHAR_INFO newTile[1];
    COORD buffSize = {1,1};
    COORD buffPos = {0,0};
    SMALL_RECT newBuffArea = {loc.X, loc.Y, loc.X, loc.Y};
    SMALL_RECT oldBuffArea = {oldLoc.X, oldLoc.Y, oldLoc.X, oldLoc.Y};

    //store newTile info
    ReadConsoleOutputA(outHnd, newTile, buffSize, buffPos, &newBuffArea);
    //check if newTile is valid
    bool valid = 0; // assume not valid
    for (int i=0; i < sizeof(walkableTiles); i++)
    {
        if (newTile[0].Char.AsciiChar == walkableTiles[i])
            valid = 1;
    }

    if (!valid)
    {
        loc = oldLoc;
        return;
    }

    //restore oldTile information
    WriteConsoleOutputA(outHnd, oldTile, buffSize, buffPos, &oldBuffArea);

    //newTile becomes oldTile
    oldTile[0] = newTile[0];

    //get bg of newTile and set character/attributes
    int bg = (newTile[0].Attributes & Blue << BG ) | (newTile[0].Attributes & Red << BG) | (newTile[0].Attributes & Green << BG) | (newTile[0].Attributes & BACKGROUND_INTENSITY);
    newTile[0].Char.AsciiChar = 1;
    newTile[0].Attributes = White | bg;

    //place character on newTile
    WriteConsoleOutputA(outHnd, newTile, buffSize, buffPos, &newBuffArea);

代码道歉，这是我的第一个游戏。