Interfacing scripts with C++ Code

#1 Shouldnt

DECLARE_CONOBJECT(fuzzyLogic);

be after the definition of the class?

Not too sure on this one, but try:

#include "console/simBase.h"
//----------------------------------------------------------------------------
class fuzzyLogic : public SimObject
{
   typedef SimObject Parent;

   public:    
   
   fuzzyLogic();
   ~fuzzyLogic();
};
DECLARE_CONOBJECT(fuzzyLogic);
IMPLEMENT_CONOBJECT(fuzzyLogic);

#2 Tried it but I get a whole load of errors. I read:

engine.overview.txt.
in
C:\Torque\SDK\engine

Here is the relevant extract that I got my code from:

Objects in the scripting language are simply instances of C++ classes deriving from SimObject, declared in the game engine and processed with a special set of macros (declared in engine/console/consoleObject.h). The DECLARE_CONOBJECT(class_name) macro is placed inside the class definition and the IMPLEMENT_CONOBJECT (class_name) macro is placed in a linked source file. IMPLEMENT_CONOBJECT has several versions, depending on the type of class:
- IMPLEMENT_CONOBJECT() A simple console object - no special network attributes.

- IMPLEMENT_CO_NETOBJECT_V1() A ghostable network object class. Any object that will be ghosted from server to client needs to be declared as a NETOBJECT. See the section on the network layer for more details about NetObjects.

- IMPLEMENT_CO_DATABLOCK_V1() A datablock class. Datablocks have special properties for being transmitted over the network.

@note There are 3 more IMPLEMENT_CONOBJECTs that deal specifically with network events. They are not covered here.

Every class declared as a Console class MUST declare a Parent typedef in its private member section referencing its parent class. This allows the console to properly determine the console object class hierarchy for method dispatch in the console.

// A very simple SimObject sample.
class SampleObject : public SimObject
{
    typedef SimObject Parent;
public:
    DECLARE_CONOBJECT(SampleObject);
    S32 someVariable; // signed integer variable
};
IMPLEMENT_CONOBJECT(SampleObject);

You can instantiate and manipulate this object in script like this:

function foo()
{
    %obj = new SampleObject(MySampleObject);
    echo(%obj.getName());
}

#3 Ok, strange, then the only thing it says (which the sample goes against) is:

Quote:"and the IMPLEMENT_CONOBJECT (class_name) macro is placed in a linked source file"

which suggest putting

IMPLEMENT_CONOBJECT(fuzzyLogic);

in your fuzzyLogic.cc.

Problem is their sample doesnt do that, it it shouldnt make s difference anyway. Apart from that, I dont know.. sorry.

#4 Done a clean rebuild? That usually fixes these sorts of situations.

#5 Try:
fuzzyLogic.h

#include "console/simBase.h"

//----------------------------------------------------------------------------

class fuzzyLogic : public SimObject
{
typedef SimObject Parent;

public: 
   fuzzyLogic();
   ~fuzzyLogic();
   DECLARE_CONOBJECT(fuzzyLogic);
};

fuzzyLogic.cc

#include "ai/fuzzyLogic.h"
#include "console/console.h"
#include "console/consoleTypes.h"
#include "console/consoleInternal.h"

IMPLEMENT_CONOBJECT(fuzzyLogic);

//----------------------------------------------------------------------------
fuzzyLogic::fuzzyLogic()
{
}

fuzzyLogic::~fuzzyLogic()
{
}

ConsoleStaticMethod(fuzzyLogic,fuzzify,bool,0,0,"usage")
{
   bool a = true;
   return a;
}

This is how my gui object is structured.

Also, doesn't the minimum arguments need to be 2 even when there are no arguments?:

ConsoleStaticMethod(fuzzyLogic,fuzzify,bool,2,2,"usage")

#6 Tried the changes and did a new clean rebuild. Same error though. Put in 2 for the number of arguments too. Anyone got any other ideas.

Appreciate the help guys!

#7 Have you checked the following
1) that you've added both the header and cc file to your project
2) That you are building a debug build and running the debug exe or building/running the release?

I know they're obvious but occasionally they can be missed :P

#8 Thanks Gary :) , but Ive got new questions now.

It works when I run torqueDemo_DEBUG.exe. Why is that, can someone explain how I can get it to run on your standard torqueDemo.exe.

also, when I try to change the return type to anything but 'bool' Visual Studio wont compile

ConsoleStaticMethod(fuzzyLogic,fuzzify,bool,2,3,"fuzzify")
{
   bool a = true;
   return a;
}

to

ConsoleStaticMethod(fuzzyLogic,fuzzify,int,2,3,"fuzzify")
{
   int a = 926;
   return a;
}

I get these errors from Visual Studio .net:

c:\Torque\SDK\engine\ai\fuzzyLogic.cc(22): error C2059: syntax error : ')'
c:\Torque\SDK\engine\ai\fuzzyLogic.cc(22): error C2065: 'conmethod_return_int' : undeclared identifier
c:\Torque\SDK\engine\ai\fuzzyLogic.cc(22): error C2146: syntax error : missing ';' before identifier 'cfuzzyLogicfuzzify'

Once again Thanks guys, Im new to Torque and over the last couple of months I really have learned a lot. Hopefully I'll get this resource finished soon so everyone can get make better ai for their games and I'll get a 1st from university.

#9 Well, can somebody help me please.

#10 I have a feeling that the return methods dont know anything about an int type but do know about S32 types.

Also, if you are using ConsoleStaticMethod, minimum arguments is 1 not 2 as with consolemethod.

The following compiles fine for me :-

ConsoleStaticMethod(fuzzyLogic,fuzzify,[b]S32,1,1[/b],"fuzzify")
{
   [b]S32[/b] a = 926;
   return a;
}

#11 Thanks David :)

It works now but only in torqueDemo_DEBUG.exe

but in torqueDemo.exe I get the following errors in the console:

demo/server/scripts/aiNPC.cs (244): Unable to instantiate non-conobject class fuzzyLogic.
demo/server/scripts/aiNPC.cs (245): Unable to find object: '0' attempting to call function 'fuzzify'

How do I get it to work in torqueDemo.exe

Thanks

#12 Sorted, if anyone else has this problem open up C:\Torque\SDK\vc7\Torque SDK.sln in Visual Studio .NET

select 'Torque Demo' in the solution explorer (usually on the right unless you moved it or got rid of it).

On the taskbar at the top the is a drop down box with debug written in it. Just change it to release and Torque will now compile to torqueDemo.exe instead of torqueDemo_DEBUG.exe

Hope that helps, its often the simplest problems that are the hardest to find an answer to!

#13 City...I just have to say thank you for your follow up post on this. I have been beating my head against the desk for hours trying to figure out what was going on. I switched to release as you suggested and it works great. Thank you again.