3d engine - GameCreators Forum

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tomtetlaw

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Posted: 13th Mar 2009 09:24 Edited at: 13th Mar 2009 09:45

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hi im making a 3d engine with DarkGDK(am i allowed to do this??) and i want to make an object loader that loads objects in the *.x format, how would i make it so it could return an object so i cound do something like this:

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my_obj = frantic::loadObject("object.x");
frantic::positionObject(my_obj, 100, 100, 100);

any help would be appreciated

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dark coder

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Posted: 13th Mar 2009 10:15

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By making a class called Object or something and having your loadObject() function return an address of an instance of this class, the class would then store the GDK object ID and other attributes. But ideally you'd have methods inside the class to handle things like positioning as your suggested method would potentially lead to a lot of wasted lines.

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tomtetlaw

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Posted: 14th Mar 2009 04:33

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how so?

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AlexI

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Posted: 14th Mar 2009 18:32

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by writing code

http://www.fphosting.co.uk FREE WEB HOSTING, NO Adverts

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AndrewT

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Posted: 14th Mar 2009 18:47 Edited at: 14th Mar 2009 18:52

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Here's what a VERY simple object class might be:

+ Code Snippet

#include "DarkGDK.h"

class GDKObject
{
public:

   GDKObject(int newID) { id = newID; }

   void Position(float x, float y, float z)
   {
      dbPositionObject(id, x, y, z);
   }
   void Rotate(float x, float y, float z)
   {
      dbRotateObject(id, x, y, z);
   }

private:

   int id;
   
};

Then you have your 'frantic' namespace which might look like this:

+ Code Snippet

#include "DarkGDK.h"
#include "GDKObject.h"

namespace frantic
{

   GDKObject* LoadObject(const char* FileName)
   {
      int ID = FindFreeObj();
      dbLoadObject(FileName, ID);
      return new GDKObject(ID);
   }

   int FindFreeObject();

}

Then you can do this:

+ Code Snippet

GDKObject* Object = frantic::LoadObject("Object.x");
Object->Position(10.0f, 10.0f, 10.0f);

That's just a simple example--it won't compile, it's just to show you one option.

EDIT:

I can't tell, is frantic a namespace or is loadObject() a static member of the class frantic?