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Bitmasks

Bitmasks are essentially bitwise comparisons. Understanding how bitmasks work might make more sense if you think of their binary representation.

The binary representation of the decimal number 1 is 0001, 2 is 0010, 4 is 0100, etc.

Think of each bit as a switch. For example, the decimal number 5 in binary is 0101. The third bit (0100) is on and the first bit (0001) is on. So, 0101 = 0100 + 0001.

 If a SOLIDWORKS PDM Professional enumerator has a bitmask like the following:

 

Decimal

Option

Binary

1

OptionA

0001

2

OptionB

0010

4

OptionC

0100

8

OptionD

1000

 

and you want OptionA and OptionC on, then add their two values together:

 

Decimal

Option

Binary

   1

OptionA

0001

+ 4

OptionC

0100

= 5

 

0101

      

 



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