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AppGameKit Classic Chat / Boolean operations? (I think)

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Mobiius
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21
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Joined: 27th Feb 2003
Location: The Cold North
Posted: 29th Dec 2012 15:36
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Hello, is there a way to check a decimal number to see if another power of two number has it's bit set in AppGameKit?

In more detail, I want to have a system where I can set a flag and check it's corresponding bit to see if it's enabled.

E.G.
Option1 = 1
Option2 = 2
Option3 = 4
Option4 = 8

OptionList = OptionList && Option1 && Option3

So now OptionList should be 5. (Or 00000101 in binary)

I've tried this but it doesn't work as I expected. Is anyone able to direct me to what I'm doing wrong??

Thanks.

I live for video games! (And beers, and football, and cars!)
See what I live for here: [url]http:\\www.TeamDefiant.co.uk[/url]
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JimHawkins
15
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Joined: 26th Jul 2009
Location: Hull - UK
Posted: 29th Dec 2012 15:57
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Try using & instead of &&

If you want to add bits in you should logical OR - |

Life is much better in Pascal. This what sets do in a highly optimised way:

type tOptions = (none,one,two,three,quitter);
tOptionSet = set of tOptions;

var Options : tOptionSet;
Options := []; // empty set

Options := Options +[one];
Options := Options + [two];
Options := Options + [Quitter];

You could also do this with Options := Options + [one,two,quitter];

You can do set compliment, exclusion, intersection, difference and comparison. But quite simply:

if quitter in Optionset then ByeBye;

I won't drone on. Happy New Year!

-- Jim DO IT FASTER, EASIER AND BETTER WITH AppGameKit FOR PASCAL
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Marl
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Joined: 19th Nov 2011
Location: Bradford, UK
Posted: 29th Dec 2012 18:35
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Quote: "I want to have a system where I can set a flag and check it's corresponding bit to see if it's enabled."

I have used a similar thing for directions;

The constants can also be expressed as binary if it makes things easier;
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Mobiius
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Location: The Cold North
Posted: 29th Dec 2012 18:38
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Cheers, sorted it after being pointed in the right direction by Jim.

To add the flag, it's ||
To check the flag it's &&

Everything's working as it should now.

(I even added a ternary IF function too. I'm to spoilt by php!)

I live for video games! (And beers, and football, and cars!)
See what I live for here: [url]http:\\www.TeamDefiant.co.uk[/url]
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Ancient Lady
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Location: Anchorage, Alaska, USA
Posted: 2nd Jan 2013 17:20
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Marl, I think you want to change the '&&' to '&'. The way you have it, you will get a true result for both tests as long as myObject.flags is not zero.

Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master
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Mobiius
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Posted: 3rd Jan 2013 15:05
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Using & doesn't work as expected, but && does.

I live for video games! (And beers, and football, and cars!)
See what I live for here: [url]http:\\www.TeamDefiant.co.uk[/url]
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JimHawkins
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Posted: 3rd Jan 2013 15:59
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As I said before, you should be using | (LOR) to add bits. If you want to use AND, you need a mask with all bits set.

-- Jim DO IT FASTER, EASIER AND BETTER WITH AppGameKit FOR PASCAL
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Mobiius
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Posted: 3rd Jan 2013 18:11
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I am using || to set bits, and && to check if a bit is set.

I live for video games! (And beers, and football, and cars!)
See what I live for here: [url]http:\\www.TeamDefiant.co.uk[/url]
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