Tutorial Request - Expression Editor

[Merrie]

Is there a tutorial about giving more details about the expression editor? I know this is a powerful bit and would like to learn more what and how it works. If this is not the proper place for this request please move it with my apologies.

[wizkidweb]

Well, if you really want to learn the expression editor, you simply need to know where everything is located, in relation to the different objects in your game/app. I'm much too busy at the moment to make a tutorial.
If you have any questions, however, fire away!

[Dines]

It's just a kind of algebra.

For example, suppose you want to set the speed of an object to the value you entered into a text box?


You click the 'set speed' action as normal, but instead of typing a speed in, you click the 'Retrieve value from an object' button (or whatever it's called these days, I'm at work right now so can't check exactly).

Anyway, you see a big box of all the objects on the frame. Click the edit box and you'll see a menu of available values that that object can give you.

One of them will be 'get numeric value'.

Click it and you'll get something like this (again, this code won't be exact because I don't have MMF on this machine to check it):

'value("EDIT OBJECT")'

And that's it. Type a number in the box, and your object's speed will change to match what you typed.

There are various mathematical functions too, like mod(), min(), max(), abs(), sin(), cos(), tan().

But anyway, you can either use the "Retrieve..." box as described above to find object properties, or simply type them in if you know them.

So for instance, I use counters a lot, so I know that if I have a counter I can just type 'value("NAME OF COUNTER")' to get its value.

Hope that goes some way.

[Merrie]

Algebra is a weak point with me But that did help Fwerb, if I have questions when things come up I'll just shout as suggested.