Wait
This construct suspends execution of the current function. The address of the function is placed into a list of waiting functions. Waiting functions are "unfrozen" after the runWaits call, which can be performed only in the C++ part of the application. Unigine runs functions from the waiting list each frame automatically. Therefore, you can create threads that act once per frame and use wait for synchronization.
Syntax
wait value;Parts
- value is an optional return value (0 by default).
Example
void thread_func() {
for(int i = 0; i < 4; i++) {
log.message("%d\n",i);
wait;
}
}
thread("thread_func");
/* Output:
* "0" // first frame
* "1" // second frame
* "2" // third frame
* "3" // fourth frame
*/void update_redirector(Sprite sprite) {
while(1) {
sprite.update();
wait;
}
}If the class instance is set, an error will be generated, because a class instance is not stored when saving the function to be handled by runWaits in the next frame. However, wait is possible if the class function is called as a static function (without passing a class instance to it):
class Foo {
void update() {
while(true) wait 1;
}
};
Foo f = new Foo();
Foo::update(); // this is valid, because the method is called as a static function
// f.update(); // this would cause a crash, because a class instance is passedSee also: thread().