Beginner's Guide to Game Programming Ep1 Part 8 Enumerations and Random Numbers

[matt55102]

can you please help me. When I add in the random function thingy instead of the stick picking a random area then staying there it jumps across the screen super fast and doesnt stop.

[AmazingRando303]

Old video, however, I see someone asked "Why use enums?" You correctly replied that they are pretty (aka readability). However, there's another reason that enums or constant globals are preferred to #define symbols. Good compilers can optimize for all variables stored in memory. #defines are replaced preprocessor and so, optimizations may not be applied.

[viv2k]

"If you don't assign a value to each one(enum), it will be assigned an arbitrary number"

Actually, by default it starts with 0 for the first one and adds 1 for each following element.

[MalaTemporaCurrunt]

first off, great job as always (i'm a true fan!)

but i suggest to delve deeper into "random" numbers generation via the % operator ... there's a problem with lower bits being far from random.

[MalaTemporaCurrunt]

hi (test)

[lotios611]

I'm having trouble with my coordinate generation function. The first time I use it, it generates a random number. After that, the coordinates go in a diagonal line until they hit the edge of the screen and then it appears at the opposite side of the screen. What could I be doing wrong?

[Farzher]

Why use enums?

don't they take up a bit of RAM and do the same thing as #define wich uses 0 RAM?

maybe i'm missing something :P

[LusikkaMage]

Enums are pretty. :D

That's about it. I like making random datatypes for "Direction", "GameState", etc.

[rodrotube]

WOW, they take up tons of RAM on your XT computer. :P

[0121ryanh117]

Enumerations automatically initialize all the stuff they contain with an increasing value each time. So first will be one, second will be 2 and so on.

This is usefull when you just want any old intialized value.

[HomocidalCanineK9]

What does unsigned do?

I haven't found anything that covers it... ):

[LusikkaMage]

Well there's a limit on what an integer can be; only so many bits can be stored in a computer, right? Normally this is -INTMAX to +INTMAX

If it's "unsigned", that means it's positive only, so it doubles how large it can be since it doesn't have an amount for the - numbers.

[SupLuiKir]

you are not getting very many view for how awesome this is. ah well, im contributing =P

[LusikkaMage]

Enumerations aren't popular. :(

[keithgarry]

Good work Lusikka!

[Ultimarox]

thanks soooo much for these tutorials!!

[Ranoka]

These videos are really great! You've put a lot of effort into making them! I also like how you're giving people the tools to solve things themself rather than just handing out finished game code. I'm going to make my own version -- think I'll go with SDL, might also do Alegro version and see which I prefer :)

Thanks again.

[hebronsawyers]

Hey, could you make a tutorial on Allegro particles please please:)

[LusikkaMage]

I'll try to look into it, but I've never done "real" particle effects before. :P

[hebronsawyers]

sweet :D

Cal said it's mostly vectors, so I should study them, still don't get it though lolol

[ADeadRock]

re-upload much? :p

[LusikkaMage]

Sorreh, YouTube doesn't let me re-upload the same video if there's something I have to fix.

[ADeadRock]

it's OK, we're lucky you're even uploading these :D thanks

[MrOnix9009]

Cool vid (:

[lightsabermaster0]

nice