manuel

// collision detection
    // we first check the x-Axis
    // determining the side which faces the moving direction
    if(movement.x > 0)
    {
        int coordFwdFEdgeX;
        if (movement.x < 0)
        {
            coordFwdFEdgeX = player.getPosition().x;
        } else
        {
            coordFwdFEdgeX = player.getPosition().x + playerSize.x;
        }
        if(coordFwdFEdgeX >= 0)
        {
            // with which line(s) of tiles does the player collide?
            std::vector<int> collidingLinesX;
            if(movement.y < 0)
            {
                for(int i = player.getPosition().y; i >= static_cast<int>(player.getPosition().y+movement.y); --i)
                {
                    collidingLinesX.push_back(i/5);
                }
            } else if (movement.y == 0)
            {
                collidingLinesX.push_back(player.getPosition().y);
            } else
            {
                for(int i = player.getPosition().y; i <= static_cast<int>(player.getPosition().y+movement.y); ++i)
                {
                    collidingLinesX.push_back(i/5);
                }
            }
            // we scan along these lines for obstacles
            int closestObstacleX = 30111995;
            if(movement.x < 0)
            {
                for(uint i = 0; i < collidingLinesX.size(); ++i)
                {
                    for(int x =(coordFwdFEdgeX+movement.x)/5; x < (coordFwdFEdgeX/5); ++x)
                    {
                        if(Play::getInstance()->getPhysicsMap()[collidingLinesX[i]][x] != 0)
                        {
                            closestObstacleX = x*5;
                        }
                    }
                }
                if(closestObstacleX != 30111995)
                {
                    movement.x = -(coordFwdFEdgeX - closestObstacleX)*deltaTime.asSeconds();
                }
            } else
            {
                for(uint i = 0; i < collidingLinesX.size(); ++i)
                {
                    for(int x = (coordFwdFEdgeX+movement.x)/5; x > (coordFwdFEdgeX/5); --x)
                    {
                        if(Play::getInstance()->getPhysicsMap()[collidingLinesX[i]][x] != 0)
                        {
                            closestObstacleX = x*5;
                        }
                    }
                }
                if(closestObstacleX != 30111995)
                {
                    movement.x = (closestObstacleX - coordFwdFEdgeX)*deltaTime.asSeconds();
                }
            }
        }
    }
    // now the y-axis
    // determining the side which faces the moving direction
    if(movement.y > 0)
    {
        int coordFwdFEdgeY;
        if(movement.y < 0)
        {
            coordFwdFEdgeY = player.getPosition().y;
        } else
        {
            coordFwdFEdgeY = player.getPosition().y + playerSize.y;
        }
        // we don't want to try to access a negative value by index
        if(coordFwdFEdgeY >= 0)
        {
            // with which line(s) of tiles does the player collide?
            std::vector<int> collidingLinesY;
            if(movement.x < 0)
            {
                for(int i = player.getPosition().x; i >= static_cast<int>(player.getPosition().x+movement.x); --i)
                {
                    collidingLinesY.push_back(i);
                }
            } else if(movement.x == 0)
            {
                collidingLinesY.push_back(player.getPosition().x);
            } else
            {
                for(int i = player.getPosition().x; i <= static_cast<int>(player.getPosition().x+movement.x); ++i)
                {
                    collidingLinesY.push_back(i);
                }
            }
            // we scan along these lines for obstacles
            int closestObstacleY = 30111995;
            if(movement.y < 0)
            {
                for(int i = 0; i < collidingLinesY.size(); ++i)
                {
                    for(int y = static_cast<float>(coordFwdFEdgeY+movement.y)/5; y < static_cast<float>(coordFwdFEdgeY)/5; ++y)
                    {
                        if(Play::getInstance()->getPhysicsMap()[y][collidingLinesY[i]] != 0)
                        {
                            closestObstacleY = y*5;
                        }
                    }
                }
                if(closestObstacleY != 30111995)
                {
                    movement.y = (closestObstacleY - coordFwdFEdgeY)*deltaTime.asSeconds();
                }
            } else
            {
                for(int i = 0; i < collidingLinesY.size(); ++i)
                {
                    for(int y = static_cast<float>(coordFwdFEdgeY+movement.y)/5; y > static_cast<float>(coordFwdFEdgeY)/5; --y)
                    {
                        if(Play::getInstance()->getPhysicsMap()[y][collidingLinesY[i]] != 0)
                        {
                            closestObstacleY = y*5;
                        }
                    }
                }
                if(closestObstacleY != 30111995)
                {
                    movement.y = -(coordFwdFEdgeY - closestObstacleY)*deltaTime.asSeconds();
                }
            }
        }
    }