Diference between scene.my.variable/controlleracc/_*variable

[francky380a380]

hi everyone, I'm a beginner in thyme scripting and I'm asking me few questions.

I alway use scene.my.variable in my scripts but I readed that I can use _variable and even controlleacc := **. Is it true, why I have to prefer the other than scene.my.variable, what's the difference and How to use them ?

Thanks a lot

(Moreover, where can i found a post, a text which explain me all the variables in the script box like (controlleracc, geomID, bendconstant, bendtarget, etc . . .) because I always see them in script but I don't know their usefullness).

[electronicboy]

Scene.my.* - Global namespace, any variables created inside this area will be exported with the scene, allowing you to use functions inside your scenes.

_variable - Geom serialiased, Any variable which isn't one of the "default" names will be removed in the process of exporting the scene to a save file, unless they start with an _, in which case they will be saved with the scene.

controlleracc, is one of the many variables which are on a geometry when it's created, unless you're using the geometry controller for moving an object, this variable is unused, so before we had _variables, we used the controlleracc for storing a variable inside.

Also, if you check on this forum, there should be a sticky with an outdated list of variables, if you're looking for something, try using the search tool or asking on this section of the forum.

[francky380a380]

Okay, so if i understood, _variable is very specific, controlleracc is very old so when i use scene.my.variable it's the best ?

that's what i did for controlleracc (that's why i ask here because i didn't understand everything) but i only founded strange results that didn't give me satisfying answer.

(I'm french, sorry for my inglish ^^)

[electronicboy]

Okay, controlleracc was used before we had to _variables on geometries, before the _variable was implimented, storing values was hard and using controlleracc was the only way to actually do it.

Also, scene.my.variable is what us programmers would refer to as a global variable, it's accessible and writable by all code on the scene, while _variables are considered local, and can only me modified by code running directly on that object or a colliding object running code onto another object.


In programming, one of the many ways to class variables are local and global.

As stated above, a global variable is accessible from all code no matter where it is.
A local variable is only accessible from the function which creates it. (however in algodoo it is a little more open with the e.other collision event)