In this tutorial you will learn...|
About timers in events
How they can be useful
How to use them successfully
Now, you may not think that timers require a lot of explaining - but, believe me, they are more tricky to use than they sound! So, in this tutorial,
I will go through making a basic system that uses a timer. Also, with this, you'll have a chance to use some Common Events too,
and become familiar with those. Basically, in this event system, I will make a lantern that runs out of oil after a certain time. (I'll write an add-on
to this tutorial later on which tells you how to incorporate buyable lantern oil items that refill the lantern etc. - but I haven't quite
got there yet!)
Firstly, open up your project and get a clear map, and on that map, double click to make a new event. In the conditions section, set it to
having a switch on, called Lantern or something similar. Now, set the trigger to parallel and in the commands section, right click and click
insert, and find the Control Timer command, which is below the Control Self Switch button. When you click on that, you'll get this box...
Now, this is pretty self-explanatory: the operation section controls whether the timer is started or stopped (if you select stop without having
started a previous timer, nothing happens), and the boxes below state how long the timer should run for. In this example, set it to about ten
seconds - it makes testing it easier, and we can always change it later.
Now, underneath the Control Timer command, add a Control Switch command, turning a new switch on - call it Timer. That's it for the first page;
it should look something like the following...
Okay, so now we need to add another page to our event. On this page, set the trigger to parallel, and in the conditions area, set the condition
to switch Timer being on. Then, in the commands section, insert a conditional branch. When you get to the conditional branch window, select
the bottom option - when Timer is … or … . In that box, put in when Timer is 0 sec. or less (it should be fewer, but that's Japanese
traslation for you!), and then uncheck the box at the bottom
of the window. Press OK. You see what we're doing here? You've just made a very basic parallel system - something I specialise in! Basically,
because this event has a parallel trigger, it will keep checking the conditions until they are true, without freezing the map as an autorun event
would. In this case, the game will keep checking to see what the timer is, and when it gets to 0 seconds, it will execute the commands that
we put in the conditional branch.
We'll put something actually inside the conditional branch later. Your second page of event commands should look something like
Now, after that, we'll have a little go at using common events. Open your database by selecting it from the menu or pressing F9 on your keyboard.
Head over to the Common Events tab, and select a blank one (if you haven't done so already). Common events, as I quickly described in one of my
lengthly database tutorials, are events that can be accessed from anywhere in the game, no matter what map you are on. Because of this, you can't
use event- or map-dependant commands like Set Move Route, etc. Also, you cannot have Action Button triggers, obviously, because there is no
event on the map. The only way to control Common Events is to either use a switch from within the event on the map where you need it, or call
the Common Event from an event on the map (we'll be doing this later on).
Now, leave the trigger and the condition boxes blank.
In the command section, we're going to put all the commands for when the lantern runs out of oil. So, because we haven't actually set up the
whole lantern system yet, I'll just have to put in some temporary commands that will show us if the timer is running or not. As I said, I'll
write a complete tutorial on laterns and oil in the Other tutorial section. So, once you've done this, you need to add a command
at the bottom of the common event which turns the Timer switch back off again. This will bring us back to the page on the map event where the
timer is started up. Your common event should now look like this...
Once you've done this, we need to do one last thing. You remember that I said we'd put something in the conditional branch later? Well, we need
to call the common event that we've just created from inside that conditional branch. This is what I was going on about earlier. Head back to the second page of your event on the map, and
inside the conditional branch, insert an event command. Now, the Call Common Event command that we need is on the first page, third up from the
bottom. Click it, and select the common event that you just made, like so...
Now you're ready to try out your system! First,
you need to make a placeholder event to turn the initial Lantern switch on, which, eventually, will be done by the Lantern Item itself. So, now
you should have your map event, your common event, and your placeholder event which turns on the switch to activate your timer in the first place.
Got that? Sorry if that was a bit confusing! Anyway, try out your system. Every ten seconds, your common event commands should execute - in my
case, the message will show up, like this...
Then, once I've cancelled the message (that is, the common event commands have stopped), the timer will restart from the Timer switch being
turned off again. Good, eh? And because we've
controlled everything with switches, we can control when the timer stops and starts, with the Lantern switch, and we can control the executed event commands all at once
using the common event. Handy system, don't you think?
Well, that's pretty much it for this tutorial - hopefully you've begun to understand timers a bit, and how they work. They're not as simple as
they sound! My next tutorial will be on something that I haven't decided yet! If you want a more complete continuation of the Lantern Oil
tutorial, head over to the Event systems section via the menu or the Sitemap. See you there!
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