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How do you access scripted variables inserted by addField()

by Chris Garrett (CG) · in Torque Game Engine · 09/30/2003 (7:05 am) · 13 replies

How do you access scripted variables inserted by addField()? Im using an object derived off of SceneObject. Yes melvs..... :)

I have a few fields that I add in cgRenderObject::initPersistFields():

addField("Name", TypeFilename,Offset( mLineName, cgRenderObject ) );
addField("Index", TypeS32, Offset( mLineIndex, cgRenderObject ) );
addField("Texture", TypeFilename, Offset( mTextureName, cgRenderObject ) );

I have looked around in source and I have seen getDataField() used. So I tried different variations of this:

const char *strName = obj->getDataField("name", NULL);

with no success. Does anyone know how to do this??

Thanks

CG
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Torque 3D Owner Xavier "eXoDuS" Amado
Default Studio Name
#1
09/30/2003 (7:46 am)
Uh... just access mTextureName or whatever. What addField does is bind a name in the editor to a variable in the class.

Associate Kyle Carter
#2
09/30/2003 (8:00 am)
Or a member in script.

Torque Owner Chris Garrett (CG)
#3
09/30/2003 (8:32 am)
Xavier: Yeah I understand that I can use a member mLineName from inside the class. I want to use the object in say.... SceneGraph::addObjectToScene() so I can print out what has loaded.

Con::printf("Adding [%s] to scene.", obj->getDataField("MyName",NULL));

for example

CG

Torque 3D Owner Robert Blanchet Jr.
#4
09/30/2003 (10:16 am)
Actually, thats exactly how you do it ;)

You can also try obj->getDataBlock()->mVarName
if mVarName is public.

Torque 3D Owner Xavier "eXoDuS" Amado
Default Studio Name
#5
09/30/2003 (8:06 pm)
Or you can do it the good way (tm) and add public methods to access the private mWhatever variable.

Associate Kyle Carter
#6
10/01/2003 (6:21 am)
You should access C++ members by using C++... using the scripting system to do it just brings in unneeded complexity and the possibility for typos and such...

Torque Owner Chris Garrett (CG)
#7
10/01/2003 (6:30 am)
Ben: Using getDataField() is using C++.
Xavier: Yes public variable or expose thru a public method I can do...

BUT there must be a use for getDataField()? If you trace thru the code you will see what its doing and it looks like its accessing those fields you have exposed to scripting.

CG

Torque Owner J. Donavan Stanley
#8
10/01/2003 (2:01 pm)
I use Con::getData in my XML serialization code... If you take a look at that it'll give you an overview of how to walk the filed list and extract information. I based that on code existing within the engine but I can't recall which file it was.

Associate Kyle Carter
#9
10/01/2003 (2:02 pm)
GetDataField is used internally by the scripting code, which is why I don't count it as using C++.

"Using C++" would be using the facilities it inherently gives you - ie, members of the class. Using getDataField to access a member of a class is more like abusing C++ :)

Torque 3D Owner Robert Blanchet Jr.
#10
10/01/2003 (2:08 pm)
I'm not sure what your getting at Chris. As others have pointed out, just use the normal C++ facilities to access your objects data.

Torque Owner Chris Garrett (CG)
#11
10/02/2003 (6:54 am)
Ben: fair enough
Rob: I am aware of the "normal" c++ methods to do this. Im trying to dig into torque, learn about it, understand it. Thats why Im asking questions .... after all that is the point of all of this no??

CG

Associate Kyle Carter
#12
10/02/2003 (12:56 pm)
Yup... GetDataField is internal, though, so don't worry. It's used by other things, but you shouldn't use it yourself.

Torque 3D Owner Robert Blanchet Jr.
#13
10/02/2003 (1:27 pm)
Ok. I understand now :)