If-Else

WarningThe scope of applications for UnigineScript is limited to implementing materials-related logic (material expressions, scriptable materials, brush materials). Do not use UnigineScript as a language for application logic, please consider C#/C++ instead, as these APIs are the preferred ones. Availability of new Engine features in UnigineScipt (beyond its scope of applications) is not guaranteed, as the current level of support assumes only fixing critical issues.

The if construct allows executing code fragments, if a certain condition is true. The optional else part executes some other code, if the condition is false.

Syntax

Source code (UnigineScript)

if(expression) { 
	// code_if_true
} else { 
	// code_if_false 
}

Parts

expression is a condition.

Example

Source code (UnigineScript)

int a = 2;
int b = 5;

if(a > b) {
	log.message("true\n");
} else {
	log.message("false\n");
}

// output: false

You can use if and else separetely.

Source code (UnigineScript)

int a=2;
if(a == 2) log.message("a is equal to 2\n");

// the result is: a is equal to 2

NoticeNote that if you use a complex boolean expression as a condition, the expression will be evaluated from the left to the right (short-circuit evaluation):

Source code (UnigineScript)

int func(int a) {
	return a;
}

// there will be only one (the first) call of func()
if(func(0) && func(1)) log.message("true\n");
// func() will be called twice
if(func(1) && func(1)) log.message("true\n");
// there will be only one (the first) call of func()
if(func(1) || func(1)) log.message("true\n");
// func() will be called twice
if(func(0) || func(1)) log.message("true\n");

Last update: 09.04.2021

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