Messages

1

Graphics / Re: Change movement direction?

« on: June 28, 2014, 02:14:27 pm »

Thank you very much!

 

2

Graphics / Re: Change movement direction?

« on: June 24, 2014, 06:08:45 pm »

Hey guys! 

Thanks for all your expenditure! =)

I know that vectors are extremely important for game programming, so I think I´m going to deal with them. I hope I find a better way than this I used in my code example.

Making a little example a ball bouncing around would be really nice, but when there´s too much expenditure then of course you haven´t to do it for me.

Julian

3

Graphics / Re: Change movement direction?

« on: June 24, 2014, 05:44:40 pm »

Hi! 

This sounds logic, but unfortunately I don´t have any knowledge on vectors. In school we will have this topic  in about 1 year and on top of that I don´t really understand how SFML handles vectors.

Do you think it will help when I deal with vector mathematics?

Julian

4

Graphics / Change movement direction?

« on: June 24, 2014, 05:17:46 pm »

Hi! =)

I´m programming a little game where a ball flies through the window and when it hits the end of the window it shall change its direction. Here´s the code I´m using for this:

void Ball::update(float frametime)
{
        if (pSpriteB->getPosition().y >= 9)
        {
                pSpriteB->move(-400 * frametime, -400 * frametime);
        }
        else if (pSpriteB->getPosition().y <= 9)
        {
                pSpriteB->move(400 * frametime, 400 * frametime);
        }
}

But when the ball hits the window´s end, it just stops and vibrates a bit. What I thought was that the previous movement is still active and I have to end up this previous movement so that the new movement direction can be done without errors, but I didn´t find anything to end up a movement.

What shall I do? Why isn´t it moving correctly? Please help!