Binary flags - История изменений

imported>Bawhoppennn: Added Category

2022-02-17T03:23:17Z

Added Category

← Предыдущая версия	Версия от 03:23, 17 февраля 2022
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2022-02-17T03:23:17Z

Added Category

2021-01-27T02:16:39Z

← Предыдущая версия	Версия от 02:16, 27 января 2021
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2021-01-27T02:16:39Z

← Предыдущая версия		Версия от 02:16, 27 января 2021
Строка 381:		Строка 381:

	/mob		/mob
	var/disabilities = 0		var/disabilities = NONE

	/mob/proc/add_disability(~~var/~~dis)		/mob/proc/add_disability(dis)
	disabilities \|= dis		disabilities \|= dis

	/mob/proc/check_disability(~~var/~~dis)		/mob/proc/check_disability(dis)
	if( disabilities & dis )		if( disabilities & dis )
	return 1		return TRUE
	else		else
	return 0		return FALSE

	/mob/proc/remove_disability(~~var/~~dis)		/mob/proc/remove_disability(dis)
	disabilities &= ~dis		disabilities &= ~dis


	{{Contribution guides}}		{{Contribution guides}}

2021-01-12T07:38:22Z

Operations in binary

← Предыдущая версия	Версия от 07:38, 12 января 2021
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2021-01-12T07:38:22Z

Operations in binary

← Предыдущая версия		Версия от 07:38, 12 января 2021
Строка 63:		Строка 63:
	=== Operations in binary ===		=== Operations in binary ===

	What can we do with these numbers ~~tho~~? There are 3 binary operators available in byond: And (&), Or (\|) and Not (~). NOTE: These are binary operators, which means they do the operation on each individual bit.		What can we do with these numbers though? There are 3 binary operators available in byond: And (&), Or (\|) and Not (~). NOTE: These are binary operators, which means they do the operation on each individual bit.

	A good way to understand how these work is to not think of these 1s and 0s as numbers, but as truth and lies (false). So wherever you have a 1, you can substitute it with a true statement, while where you have a 0 you substitute it with a lie (a false statement).		A good way to understand how these work is to not think of these 1s and 0s as numbers, but as truth and lies (false). So wherever you have a 1, you can substitute it with a true statement, while where you have a 0 you substitute it with a lie (a false statement).

2021-01-12T07:35:54Z

Toggling bitflags

← Предыдущая версия	Версия от 07:35, 12 января 2021
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2021-01-12T07:35:54Z

Toggling bitflags

← Предыдущая версия		Версия от 07:35, 12 января 2021
Строка 303:		Строка 303:
	* where the right hand side of the XOR is a 0, it will leave the left hand side values unchanged in the final output		* where the right hand side of the XOR is a 0, it will leave the left hand side values unchanged in the final output

	If you refer back to the [[Binary_flags#Binary_Xor_.28_.5E_.29 \| XOR truth table]]~~, specifically,~~ the truth table entries that deal with a 1 on the right hand side of the ~~xor~~ operation		If you refer back to the [[Binary_flags#Binary_Xor_.28_.5E_.29 \| XOR truth table]] you can see these principles clearly

			First the truth table entries that deal with a 1 on the right hand side of the XOR operation
	* 0 ^ 1 = 1		* 0 ^ 1 = 1
	* 1 ^ 1 = 0		* 1 ^ 1 = 0
	~~You can see they are flipping~~ the ~~result bit to be~~ the ~~opposite of whatever was set in the left~~ hand side of the operation.		Then the truth table entries that deal with a 0 on the right hand side of the XOR operation
			* 0 ^ 0 = 0
			* 1 ^ 0 = 1


	To help illustrate this concept, lets do an example where the user has the DISABILITY_ARM and the DISABILITY_EAR flags set and we want to toggle the DISABILITY_ARM flag to be the opposite of whatever it was before		To help illustrate this concept, lets do an example where the user has the DISABILITY_ARM and the DISABILITY_EAR flags set and we want to toggle the DISABILITY_ARM flag to be the opposite of whatever it was before

2021-01-12T07:33:48Z

Toggling bitflags

← Предыдущая версия	Версия от 07:33, 12 января 2021
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2021-01-12T07:33:48Z

Toggling bitflags

← Предыдущая версия		Версия от 07:33, 12 января 2021
Строка 299:		Строка 299:
	Sometimes, you want to toggle a bitflag, that is, if the bit on the flag is 1, you want to set it to 0, and if the bit is 0, you want to set it to 1		Sometimes, you want to toggle a bitflag, that is, if the bit on the flag is 1, you want to set it to 0, and if the bit is 0, you want to set it to 1

	You can use the ~~xor~~ function to do this due to the following properties		You can use the XOR function to do this due to the following properties
	* where the right hand side of the XOR is a 1, it will "toggle" the bits on the left hand side in the final output		* where the right hand side of the XOR is a 1, it will "toggle" the bits on the left hand side in the final output
	* where the right hand side of the XOR is a 0, it will leave the left hand side values unchanged in the final output		* where the right hand side of the XOR is a 0, it will leave the left hand side values unchanged in the final output