Keskustelu: Ohjelmointikysymykset: C++: ns. Map komento

namespace Game {
    static SDL_Rect wall;
    static SDL_Rect box;
    //The square
    class Square
    {
        private:
        SDL_Rect box;
        int xVel, yVel;

        public:
        Square();
        void handle_input();
        void move();
        void show();
    };
    static int SQUARE_WIDTH=100;
	static int SQUARE_HEIGHT=100;
}


Game::Square::Square()
{
    //Initialize the offsets
    box.x = 0;
    box.y = 0;

    //Set the square's dimensions
    box.w = SQUARE_WIDTH;
    box.h = SQUARE_HEIGHT;

    //Initialize the velocity
    xVel = 0;
    yVel = 0;
}
void Game::Square::move()
{
    //Move the square left or right
    box.x += xVel;

    //If the square went too far to the left or right or has collided with the wall
    if( ( box.x < 0 ) || ( box.x + SQUARE_WIDTH > RESOLUUTIO_LEVEYS ) || ( check_collision( box, wall ) ) )
    {
        //Move back
        box.x -= xVel;
    }

    //Move the square up or down
    box.y += yVel;

    //If the square went too far up or down or has collided with the wall
    if( ( box.y < 0 ) || ( box.y + SQUARE_HEIGHT > RESOLUUTIO_KORKEUS ) || ( check_collision( box, wall ) ) )
    {
        //Move back
        box.y -= yVel;
    }
}
bool Game::check_collision( SDL_Rect A, SDL_Rect B )
{
    //The sides of the rectangles
    int leftA, leftB;
    int rightA, rightB;
    int topA, topB;
    int bottomA, bottomB;

    //Calculate the sides of rect A
    leftA = A.x;
    rightA = A.x + A.w;
    topA = A.y;
    bottomA = A.y + A.h;

    //Calculate the sides of rect B
    leftB = B.x;
    rightB = B.x + B.w;
    topB = B.y;
    bottomB = B.y + B.h;
        //If any of the sides from A are outside of B
    if( bottomA <= topB )
    {
        return false;
    }

    if( topA >= bottomB )
    {
        return false;
    }

    if( rightA <= leftB )
    {
        return false;
    }

    if( leftA >= rightB )
    {
        return false;
    }

    //If none of the sides from A are outside B
    return true;
}