Gamevar operators: Difference between revisions

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clarify modulo op
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|[[Wikipedia:Modulo operation|modulo]], remainder
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|Ensure that <value> does not equal 0 at any time.
|Ensure that <value> does not equal 0 at any time; sign of the result is that of left hand side operand.
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|and
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Revision as of 13:12, 20 January 2012

<operator>var <gamevar> <value>
<operator>varvar <gamevar> <value>

Gamevar operators are commands that perform various mathematical operations on gamevars.

For example:

setvar temp 1 // assigns a value of 1 to the gamevar temp.

addvar temp 1 // adds 1 to temp, causing its value to become 2.

mulvar temp 2 // multiplies temp by 2, causing its value to become 4.
Operator C/C++ Math Description Notes
set = = assignment
add + + addition
sub - subtraction
mul * × multiplication
div / ÷ division Ensure that <value> does not equal 0 at any time.
mod % modulo, remainder Ensure that <value> does not equal 0 at any time; sign of the result is that of left hand side operand.
and & bitwise AND The bits in the result are set only if they were set in both of the values being operated on.
or | bitwise OR The bits in the result are set only if they were set in either of the values being operated on.
xor ^ bitwise XOR The bits in the result are set if only one of the values being operated on has those bits set.

Commands with an additional "var" suffix take gamevars rather than constants or defined labels for their inputs. As an alternate short form, "varvar" can be dropped from these commands; for example ife serves an an alias for ifvarvare.