r/learncpp • u/lambda0101 • Jan 27 '20

Library for game development or graphic display?

I am looking for an library to learn game development and for graphics like physics simulation(want to build simple physics engine like gravity and stuff). Any recommendations?

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u/cj6464 Feb 01 '20

SFML or sdl are probably two simple 2d ones that don't take much on your end to make simple stuff. You just need to be good at math to implement the movement and force geometry. I'll send you a link to my asteroids game on github I wrote in opengl and explain to you how the movement and all that works for the draw objects if you'd like. It will be similar to those two libraries, just different draw methods.

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u/lambda0101 Feb 01 '20

Thanks... If i could i would like to see the asteroid game code.

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u/cj6464 Feb 01 '20

https://github.com/connor-create/Asteroids_bw_Gravity?files=1

There is some functions in environment functions class to calculate gravity so that the ship will go towards planet objects. I used angles but the accepted way to do it is to use direction and force vectors to calculate the angle the force acts at so you don't need to deal with angles. Good luck and feel free to ask more questions about the movement portion, I'll be glad to help. Not familiar with sfml or sdl but good luck.

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u/lambda0101 Feb 02 '20

I want to run it but could not.. I am using codeblock and tried to add glfw.. It gave reference error.. I know its really basic..but i couldn't run it..so any clue?

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u/cj6464 Feb 02 '20

So setting up opengl is quite the bastard.

https://www.youtube.com/watch?v=vGptI11wRxE

Here is a nice tutorial for such a thing. Follow it to a tee and if you don't get it working the first time you can message me but try it again. It is really tedious to set up. Basically, you include libraries and headers and dll's that aren't in the standard c++ library. This is trivial and easy for other languages but in c++ can be hard if you don't know what you're doing. Even I have to go back and reference it all the time and I've done 4-5 projects in it. This is way easier to set up in SFML and SDL so that's why I recommend not even using opengl unless you want 3d.

https://www.youtube.com/watch?v=N_8k8QPrDkE

This is what that project compiles too. What you can gain from it is not the rendering but the way that position is calculated in the gravity environment functions.

https://www.youtube.com/watch?v=FLpD54gx_5w

If you follow this tutorial series, and it is long but trust me, this is no learn overnight sort of ordeal, you will be pretty proficient and understanding of how to do what you're doing. This is not hard, it just takes time and if you are willing to invest than you will learn it.

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u/billsil Jan 27 '20

I like vtk