I’m trying to create a day night system where NPC will react depending of the time (like go to bed during night).
I have the light cycle by rotating the Light Source by “AddActorRotation”.
Now I found on the net a lot of tuto to caculate the clock just by adding values to the seconds but sometimes if you pick a slow “day speed” for the rotation, the hours are delayed from the light cycle resulting in inaccurate calculation.
So I would like to get the minutes of the day from the rotator of the light actor. Unfortunately it’s not just a 0->360 rotation. It’s more like 0->90->0->-90 or something like this resulting in something ugly that I can get to work.
I just want to get the time of day depending to the rotation of the light so that it’s more accurate. Is there a solution here?
Or do you have a better solution for an ingame clock?
So technically there’s many ways to make a clock, and it’s usually best to define the rotations by the clock and not the other way around, but in reality it doesn’t matter too much. Your implementation is perfectly fine! All you need is one little node and you can make the rotators read out 0 - 360!
Oh wow I see! You’re correct, it seems the Y axis functions entirely differently than the X axis. Looks like it’s ping ponging after going +90. That’s a feature I didn’t know of! I might have to show you a different solution in this case.
The other solution is to keep a variable like a rotation log in that whenever you increment the rotation you increment this variable by the same amount. This way it’s locked to your rotation, but it does mean that if you have to set the time manually you need to do it to both, so it’s recommended to use functions for that portion.
I don’t like the fact the 2 are not connected (time and rotation) by adding the same value to the time aside of the rotation but it seems to work better than the solution I had before.
I tried to slow down the speed to a more realistic cycle but then the rotation of the light stops when it hits perfect 90 or -90…
Is there a problem with the addRotation?
[EDIT]
I found this about this problem:
It’s called Gimbal Lock…
[EDIT 2]
I’m trying to get rid of the Gimbal Lock issue.
Also I found the node “rotator from axis and angle” which should do exactly what I want. It works fine until angle 90° then it goes crazy in every directions…
So I fixed it by using the plugin “Sun Position Calculator” as you just have to provide it your time in hours/mins/secs days etc and it calculates the position depending of the logitude and latitude you give it.
I wanted an accurate sun cycle with hours, here it is!
Here’s how I did it, so simple…
