Tilemap碰撞sfml c平台

Question

我的2D平台游戏有问题。由于我刚刚开始使用c，因此我在瓷砖碰撞方面遇到了麻烦。我能够阻止玩家进入图块，并且能够远离它，但不知何故，他不能沿着图块移动。

此功能用于检查新位置是否位于实心瓷砖内：

空地图：：drawColMap（播放器

for (int i = 0; i < _player.tiles.size(); i++)
{
    if (colMap[_player.tiles[i].y][_player.tiles[i].x] == 1) //solid tile = 1
    {
        _player.willCollide = true;
        break;
    }
    else {
        _player.willCollide = false;
    }
}

}

以下是移动播放器的代码：

void Player：：update（） {

sf::Vector2f newPosition;  
sf::Vector2f oldPosition;

oldPosition.x = playerImage.getPosition().x; // store the current position
oldPosition.y = playerImage.getPosition().y;

newPosition.x = playerImage.getPosition().x; // store the new position
newPosition.y = playerImage.getPosition().y;

if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
{
    source.y = Left; //sprite stuff
    moving = true;
    newPosition.x -= 2;
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
{

    source.y = Right;
    moving = true;
    newPosition.x += 2;
}


if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
{

    source.y = Up;
    moving = true;
    newPosition.y -= 2;

}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
{

    source.y = Down;
    moving = true;
    newPosition.y += 2;
}

if (!(sf::Keyboard::isKeyPressed(sf::Keyboard::Left) || sf::Keyboard::isKeyPressed(sf::Keyboard::Right) || sf::Keyboard::isKeyPressed(sf::Keyboard::Up) || sf::Keyboard::isKeyPressed(sf::Keyboard::Down)))
{
    moving = false;
}

//create corners to check collision

bottom = newPosition.y + 32; //tile size is 32 px
left = newPosition.x;
right = newPosition.x + 32;
top = newPosition.y;

sf::Vector2i topLeft(sf::Vector2i((int)left / 32, (int)top / 32)); // get the corners of the new position
sf::Vector2i topRight(sf::Vector2i((int)right / 32, (int)top / 32));
sf::Vector2i bottomLeft(sf::Vector2i((int)left / 32, (int)bottom / 32));
sf::Vector2i bottomRight(sf::Vector2i((int)right / 32, (int)bottom / 32));

tiles.clear();

tiles.push_back(topLeft);
if (std::find(tiles.begin(), tiles.end(), topRight) == tiles.end()) tiles.push_back(topRight);  //check the corners
if (std::find(tiles.begin(), tiles.end(), bottomLeft) == tiles.end()) tiles.push_back(bottomLeft);
if (std::find(tiles.begin(), tiles.end(), bottomRight) == tiles.end()) tiles.push_back(bottomRight);

//if no collision set the position to the new position
if (!willCollide)                
    playerImage.setPosition(newPosition);
else
    playerImage.setPosition(oldPosition);  //if collision then set the position to the previous position

}

感谢任何帮助！

//编辑1

我试着记录碰撞，它显示即使我不按任何键，玩家仍然在碰撞区域。但是我如何阻止玩家进入呢？我找不到问题。

//编辑2

我想我发现了另一个问题。碰撞检查可能应该在移动玩家之前和移动新位置之后运行。

Answer 1

玩家碰撞后，更改位置，将其在远离碰撞区域（适当方向）的方向上移动1个像素。如果角未正确移出碰撞区域，则可能仍在碰撞边界内。