Timing things in Ultra

[SpiderPig]

Is there a need for something like this in Ultra or is the game loop frequency manged by the engine as indicated by world::Update()'s frequency parameter?

uint64_t time_span = 1000;//ms
uint64_t time_interval = 100;//ms
uint64_t start_time = Millisecs();
float range = 90.0f;
float inc = range / (float)(time_span / time_interval);

//loop

auto result = 0.0f;
uint64_t current_time = Millisecs();
if (current_time >= start_time + time_interval) {
	start_time = current_time;

	result += inc;//Should be approx 90.0f after a second
}

 

[Josh]

You can, but since the update step is fixed, unlike Leadwerks, you can rely on each iteration occurring in intervals of 16.667 milliseconds.

[SpiderPig]

Sweet, thanks!

[SpiderPig]

I wonder if we could get the current update frequency of the world?  I could probably store a variable for this somewhere myself actually but just wondering.

float convertRPM(float rpm) {
	auto frequency = (world->update_frequency * 60.0f) / rpm;

	return 360.0f / frequency;
}

 

[Josh]

That is probably a good idea, especially for self-contained entity component code.

[SpiderPig]

That's pretty much what I'm doing now.