BitReplace: Difference between revisions
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(Created page with "{{Server client function}} {{Needs_Example}} __NOTOC__ {{New feature/item|3.0132|1.3.2|5340| ... }} ==Syntax== <syntaxhighlight lang="lua"> uint bitReplace ( uint var, uint replaceValue, int f...") |
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This function returns the unsigned number formed by var value with replacement specified at bits field to field + width - 1 | |||
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Revision as of 22:30, 2 October 2013
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This function returns the unsigned number formed by var value with replacement specified at bits field to field + width - 1
Syntax
uint bitReplace ( uint var, uint replaceValue, int field, int width = 1 )
Required arguments
- var: The value
- replaceValue: The replaceValue
- field: The field number
- width: Number of bits to extract
Returns
Returns the replaced value/bit sequence.
Example
function replaceColorAlpha(color, alpha) return bitReplace(color,alpha,24,8) -- return value with replaced bits 24-32 ( the alpha, http://en.wikipedia.org/wiki/RGBA_color_space ) end