This page has been translated automatically.
Программирование
Fundamentals
Setting Up Development Environment
Usage Examples
UnigineScript
C++
C#
UUSL (Unified UNIGINE Shader Language)
File Formats
Rebuilding the Engine and Tools
GUI
Double Precision Coordinates
API
Containers
Common Functionality
Controls-Related Classes
Engine-Related Classes
Filesystem Functionality
GUI-Related Classes
Math Functionality
Node-Related Classes
Networking Functionality
Pathfinding-Related Classes
Physics-Related Classes
Plugins-Related Classes
CIGI Client Plugin
Rendering-Related Classes
Внимание! Эта версия документация УСТАРЕЛА, поскольку относится к более ранней версии SDK! Пожалуйста, переключитесь на самую актуальную документацию для последней версии SDK.
Внимание! Эта версия документации описывает устаревшую версию SDK, которая больше не поддерживается! Пожалуйста, обновитесь до последней версии SDK.

Switch-Case

The switch-case conditional statement is an alternative to the if-else statement. It consists of aswitch part, which holds an expression that should evaluate to an integer result, and several case blocks, which define possible integer results and corresponding actions. This statement is more efficient than the if-else statement and should be preferred, if the tested expression returns an integer and there will be multiple branches based on its result.

Syntax

Source code (UnigineScript)
switch(expression) { 
	case constant: 
		// some_code;
		break;
	// …; 
	default:
		// some_code;
		break;
}

Parts

  • expression is a condition.
  • constant can be an integer or an enumeration member or an exported variable. It can also be typeid(type) statement (see the example below
  • default is a label that specifies a code block which will be executed when none of the constants listed are matched. The default block is optional.

Example

Source code (UnigineScript)
enum {
	THREE = 3,
};

switch(6 * 1) {
	case 1:
		log.message("one\n");
		break;
	case 2:
		log.message("two\n");
		break;
	case THREE:
		log.message("three\n");
		break;
	case 4:
	case 5:
		log.message("four, five\n");
		break;
	default:
		log.message("default\n");
		break;
Note that if there is no break at the end of a case block, script execution "falls through" to the next case block, as if its value also matched the result of the tested expression.
Notice
  • There should be no whitespace between the word "default" and the following colon. Also, there should be no other labels with the name "default" within the script.
  • Values for case comparisons are pre-compiled. Therefore, if an exported variable is used as a constant in such a comparison, and if its value is changed in the C++ code, the old value will be used nevertheless.

It is possible to use typeid(variable_type) as a constant for a case within a switch. This function checks if the variable belongs to a specified type and performs a corresponding action.

Source code (UnigineScript)
Variable data = node.getData();
switch(typeid(data)) {
	case typeid(int):
		log.message("int\n");
		break;
	case typeid(float):
		log.message("float\n");
		break;
	case typeid(vec3):
		log.message("vec3\n");
		break;
	case typeid(vec4):
		log.message("vec4\n");
		break;
	case typeid(string):
		log.message("string\n");
		break;
}
Last update: 20.10.2017
Build: ()