Expressions

You can use expressions as input parameter to reduce the amount of logic entities used. Expressions in input parameter start with $$=

For example, using this as input parameter: $$='Health: ('..!activator.m_iHealth..'/'..!activator.m_iMaxHealth..')' will set health information as input parameter

Expressions are calculated during input execution .

Do not put double quote " inside expression, but you are allowed to use comma , .

As an admin, sig_expression_test "expression" command can be used to test expressions. Example: sig_expression_test "2+2"

Syntax

		Example
'AADSD'	literal string	'AADSD'
4.3	number	4.3
[1 4 5.5]	vector	[1 4 5.5]
entityname.variable	access entity sendprop, datamap, or custom variable	!activator.m_iHealth + 41
+ - * / %	add, subtract, multiply, divide, modulo operators	5 + 2
..	join strings	'This is ' .. 2 .. ' awesome'
> >= < <= == !=	comparison operators	test(7 > 3, 1, 3)
()	parentheses, expression inside is calculated before others	(4 + 3) * 2
function(param 1, param 2 ...)	function	min(entity.m_iHealth, entity2.m_iHealth)
&& ||	and, or operators	entity.m_iHealth > 4 && entity2.m_iHealth < 2
& | ^	and, or, xor binary operators
>> <<	right bit shift, left bit shift
pi	pi number	pi * pi
degtorad, radtodeg	convert angle between degrees and radiants	9 * degtorad
true, false	logical true/false

Values are automatically converted when types of left and right sides of operators differ.

For example, [1 4 5] + 4 will automatically convert 4 to [4 4 4] vector

\' escapes single quotes inside literal string

Functions

Logic

test( test expression, if true, if false )
?( test expression, if true, if false )
exists( value )
not( value )
!( value )
~( value )
case( test value, default, case1, [case2] ... )
type( value )

Entity

playeratindex( index )
entityindex( entity )
playeritematslot( entity, slot )
attribute( player or item, attribute name )

Math

min( value 1, value 2 )
max( value 1, value 2 )
clamp( input value, minimum value, maximum value )
remap( input value, from min, from max, to min, to max )
remapclamped( input value, from min, from max, to min, to max )
sqrt( value )
pow( base, exponent )
floor( value )
ceil( value )
randomint( minimum value, maximum value )
randomfloat( minimum value, maximum value )
int( value )
float( value )
sin( angle in radians )
cos( angle in radians )
tan( angle in radians )
atan( value )
atan2( x, y )
abs( value )

Vector

length( vector )
distance( vector 1, vector 2 )
dotproduct( vector 1, vector 2 )
crossproduct( vector 1, vector 2 )
rotate( input vector, rotation angles )
normalize( vector )
toangles( vector )
toforwardvector( angles )
vector( string or X coordinate, [Y coordinate], [Z coordinate] ) 
x( vector )
y( vector )
z( vector )

Strings

string( value )
stringpad( value, min digits, num digits after decimal point )
charat( string, pos )
substr( string, pos, length )
substring( string, pos, length )
startswith( string, prefix )
endswith( string, suffix )
find( haystack, needle )