Function ReadTtl

Source/URLabEditor/Private/MjEditorOpHandlers.cpp:1092–1111

Translate wire ttl into (bPersistent, LifeTime) pair UE's DrawDebug* * helpers expect. ttl > 0: bPersistent=true, lifetime=ttl (auto-expires). * ttl == -1: bPersistent=true, lifetime=-1 (kept until clear_markers). * ttl == 0 or missing: bPersistent=false, lifetime=-1 (single frame). */

 *  ttl == -1: bPersistent=true, lifetime=-1 (kept until clear_markers).
 *  ttl == 0 or missing: bPersistent=false, lifetime=-1 (single frame). */
void ReadTtl(const TSharedPtr<FJsonObject>& Req, bool& bOutPersistent, float& OutLifetime)
{
	double Ttl = 0.0;
	Req->TryGetNumberField(TEXT("ttl"), Ttl);
	if (Ttl > 0.0)
	{
		bOutPersistent = true;
		OutLifetime = (float)Ttl;
	}
	else if (Ttl < 0.0)
	{
		bOutPersistent = true;
		OutLifetime = -1.0f;
	}
	else
	{
		bOutPersistent = false;
		OutLifetime = -1.0f;
	}
}

TSharedPtr<FJsonObject> HandleDrawMarker(const TSharedPtr<FJsonObject>& Req)
{