Comments on: Conditions and branching demo: Bouncing shapes https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/ Game Coding for Beginners Fri, 06 Jun 2025 18:08:06 +0000 hourly 1 https://wordpress.org/?v=4.2.38 By: John Horton https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/#comment-6912 Fri, 08 Sep 2017 12:19:23 +0000 http://gamecodeschool.com/?p=12650#comment-6912 Thanks for your comment. Yes, it is really satisfying to solve a problem. The longer it takes the bigger the high when you succeed.

Good luck with your programming,

John

]]> By: Lunartiglio https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/#comment-6888 Wed, 06 Sep 2017 15:49:46 +0000 http://gamecodeschool.com/?p=12650#comment-6888 Thak you a lot John, i’m on my day one C++ learning and i’m loving your tutorials. One thing which bothered me a lot while the balls where bouncing around was that they went outside of the window while going down and right (well X+ and Y+) so after a bit of head scratching, a couple more variables and some adjustments i was able to fix it and they now stay inside every side of window and i’m very proud of myself all thanks to your tutorials!
Cheers from Italy!

]]> By: John Horton https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/#comment-3699 Fri, 30 Dec 2016 13:33:45 +0000 http://gamecodeschool.com/?p=12650#comment-3699 There are two possible things going on. Firstly, the resolution the window is set to at the start of the code might be different to your monitor. Also, all SFML shapes and other graphical objects as well have an origin. This is the point at which the shape is drawn. The shapes are obviously bigger than one pixel so the position of the origin has an effect. The default origin is the top left pixel which is why they bounce nicely on the top and left but dissappear on the bottom and right. SFML provides a way to choose the origin so you can give each shape the origin that you prefer.

You could try writing something like this just after you declare tri.
tri.setOrigin(50, 50);

I hope this helps a bit.

]]> By: Świniomiś https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/#comment-3688 Thu, 29 Dec 2016 22:30:55 +0000 http://gamecodeschool.com/?p=12650#comment-3688 Hi John – Thanks for excellent website. I really appreciate and enjoy it. These are my first steps with C++.

I did this project and it works well – but one thing is not clear for me. Both shapes, while bouncing the top and left wall- they bounce once they just touch the wall, while when going towards right and bottom wall – they go beyond it (i.e. hide) and reverse the direction only when the last pixel disappears.
I work on OSX and Xcode. I corss checked it by copying your code and this is exactly the same so no typing error on my end.

Do you have any idea why is that?

Cheers,

Swnms

]]> By: John Horton https://gamecodeschool.com/sfml/conditions-and-branching-demo-bouncing-shapes/#comment-2106 Fri, 17 Jun 2016 08:29:57 +0000 http://gamecodeschool.com/?p=12650#comment-2106 Hi Zoltan, What is the error. I will try and help.

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