Well, the often used alternative to gamestudios while loops with wait(1), which also Unity uses are event functions. in unity one is for example called Start. That is called in the moment the object is created. Then there is the update function, which is called each frame, directly before rendering And then there of course are some other events as well like mouseDown or what ever it is called, which is executed in the moment a mousebutton is pressed above the object and there of course are also other functions like that. It is actually very easy.
These function are always called in the same order of course. A bit more tricky in unity is in my opinion the way you can access other objects. But also that works fine if you once found out how to do it. What I like is that the code is in general very modular and quite clean, the disadvantage of the object oriented design are on the other hand the very long code lines which tend to be a bit messy. I for example have a script instance which has the pointer to another scripts instance which has the gameobject it handles as pointer, which has the transform member, which holds the position, which holds the x, y and z components. The result is something like this: scrobj1.scrobj2.gameObject.transform.position.x, but well this is an extreme case of course, just to demonstrate what I mean.

It appears to use a similar approach to lite-C's EVENT_FRAME, if I'm not mistaken. Of course, lite-C's frame event could more easily get quite convoluted since the same event/function will be used with any other events that the entity detects (EVENT_IMPACT and so on).

Unity appears to separate these, and it looks quite nice.

Jibb

EDIT: Okay, thanks for the explanation, Slin. (I had the reply window open for too long).

we are using while loops for repating same task in all frames(while(1) ... wait(1)) in Unity, there are functions that are automatically called every frame, so you are already writing the inside of the while.

Ah, great, that explains the start() and update() in the examples from Captain Kiyaku's explanations.

Now, I'm getting shameless :
How does one entity create another? F.i. a dying entity leaves a health pack...

(Hope, you don't mind my questions, for I don't have the time to take a closer look at Unity now, but I'm veeery curious. It is more a sort of entertainment, since there's not much happening at these forums at the moment and I enjoy your company... So, please don't feel forced to answer!)

Well there's more to it than that. The special thing about wait(1) in A7 is that function execution continues from that spot the next frame, with all local variables preserved.

Assuming Unity lets you extend its entity objects by adding your own variables to the objects themselves (which I'm sure it does, but I just don't know), this wouldn't be an issue anyway, I guess.

Jibb

there is a function smiliar to ent_create.

Instantiate(object/prefab, position, rotation);


edit: object/prefab can have several attached scripts to itself.

There is the function Instantiate(Load.Ressource("Prefabname"), Position, Rotation) which will create that prefab. A prefab is usually an object with script, collision hull and some other components, where in some way everything is a member of the script if it has one.

there also is something similar to wait() though:

http://unity3d.com/support/documentation/ScriptReference/index.Coroutines_26_Yield.html

Thanks for your answers so far!
The explanations from the link look quite clear.
Can't wait to read through the manual and take the first steps of scripting when I have time.

I find this all very exciting. I plan to do some more testing soon to compare the power and indoor scene management of different game engines.

I currently finished a new sci-fi pack and started to work on a few models / indoors for the next pack. Here is a first test in the C4 engine:



more images here:
http://www.terathon.com/forums/viewtopic.php?f=30&p=81005#p81002

I am really interested to see how other technology performs, when I add lights, shadows and shaders in a similar way and how I can optimize culling (zones and portals).
Since I have a license of Torque3D, I will do a test there also. I own C4 and I probably will get Unity 3 soon to better support our Unity customers.
But for testing A7 I probably need some help.