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Dynamic Variables

General and Gameplay Programming Programming

Started by Andrew Nguyen December 31, 2001 03:11 PM

29 comments, last by Andrew Nguyen 22 years, 3 months ago

Andrew Nguyen

150

Author

December 31, 2001 03:11 PM

I''m thinking, is there a Dynamic Varible available? No.was the answer. Now, I have to say, they are useful. What is a dynamic variable you may ask, well, if i said: dynamic int a and a = (c/b), then if c and b bothe equaled 5, a would be 0 now, the computer only processess that once, but what if b or c changed? Well, with a dynamic variable, a would be constantly recalculated if b or c were constantly recalculated too.

---START GEEK CODE BLOCK---GCS/M/S dpu s:+ a---- C++ UL(+) P(++) L+(+) E--- W++ N+ o K w(--) !O !M !V PS- PE+Y+ PGP+ t 5 X-- R tv+ b+ DI+ D G e* h! r-- !x ---END GEEK CODE BLOCK---

Martee

476

December 31, 2001 03:27 PM

#define a (c / b)

ReactOS - an Open-source operating system compatible with Windows NT apps and drivers

VolkerG

151

December 31, 2001 03:27 PM

I don''t know of any programming language that supports "Dynamic Varaibles".
But how can 5/5 be 0?

Andrew Nguyen

150

Author

December 31, 2001 03:29 PM

Minor thing, forget it.

---START GEEK CODE BLOCK---GCS/M/S dpu s:+ a---- C++ UL(+) P(++) L+(+) E--- W++ N+ o K w(--) !O !M !V PS- PE+Y+ PGP+ t 5 X-- R tv+ b+ DI+ D G e* h! r-- !x ---END GEEK CODE BLOCK---

MindFlayer

262

December 31, 2001 03:34 PM

Hmm... Interesting idea though. One could write a C++ class or something

Andrew Nguyen

150

Author

December 31, 2001 03:38 PM

It actually would be VERY useful in game programming (THe truth)

---START GEEK CODE BLOCK---GCS/M/S dpu s:+ a---- C++ UL(+) P(++) L+(+) E--- W++ N+ o K w(--) !O !M !V PS- PE+Y+ PGP+ t 5 X-- R tv+ b+ DI+ D G e* h! r-- !x ---END GEEK CODE BLOCK---

barazor

122

December 31, 2001 03:39 PM

sounds alot like references
maybe
int &a = (c/b);
would work...not sure though

MindFlayer

262

December 31, 2001 03:46 PM

quote:Original post by barazor
sounds alot like references
maybe
int &a = (c/b);
would work...not sure though

Blahh.. Maybe! I've got to test this out!

Edited by - MindFlayer on December 31, 2001 4:47:27 PM

Andrew Nguyen

150

Author

December 31, 2001 03:48 PM

Maybe that class would accept a string operator and will recalculate again and again?

---START GEEK CODE BLOCK---GCS/M/S dpu s:+ a---- C++ UL(+) P(++) L+(+) E--- W++ N+ o K w(--) !O !M !V PS- PE+Y+ PGP+ t 5 X-- R tv+ b+ DI+ D G e* h! r-- !x ---END GEEK CODE BLOCK---

Oluseyi

2,123

December 31, 2001 03:54 PM

Maybe the only viable solution so far is Martee''s #define?

Your class would need to create a thread and periodically poll the values of variables it was assigned to monitor - useless overhead. If the variable was a symbolic alias (meaning that it was replaced by the actual values at compile time), then it would work but would introduce some new problems.

I think it''s easier to simply notify any "watcher" variables whenever code modifies a variable''s value.

[ GDNet Start Here | GDNet FAQ | MS RTFM | STL | Google ]
Thanks to Kylotan for the idea!

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