Clicked Object Properties

WiLLyRS · 05-09-2011 09:10 PM

Hi guys, from the "doors" tutorial I've managed to click on an object and recognise which object
type is, in particular i would like to recognise an animatable object, doing this:

Code:

if(Game::Animatable *Animatables=CAST(Game::Animatable,phys_hit.obj))[/php]

The declaration of Animatables is [code]Game::ObjMemx<Game::Animatable> Animatables;

And I load with the normal

Code:

.setObjType(Animatables, OBJ_ANIMATABLE)

in the game world init.

The debug show me that it goes correctly into the if, so the code until here is correct. My
problem is that after this cast I don't know how to access to that object properties, like meshes
etc. I saw the struct is:

Code:

STRUCT(Animatable , Obj) // Game Animatable Object

//{

   Flt         scale    ; // scale

   MeshPtr     mesh     ; // mesh

   MaterialPtr material ; // overriding material

   CSkeleton   cskel    ; // controlled skeleton

   SkelAnim   *skel_anim; // skeleton animation

   PhysBodyPtr phys     ; // physical body

   Actor       actor    ; // actor

   // manage

   virtual void create(ObjParams &obj); // create from object parameters

   // get / set

   virtual Vec    pos   (                ); // get position

   virtual void   pos   (C Vec    &pos   ); // set position

   virtual Matrix matrix(                ); // get matrix  , returned matrix is normalized

   virtual void   matrix(C Matrix &matrix); // set matrix  , 'matrix' must be normalized

   // callbacks

   virtual void memoryAddressChanged(); // called when object memory address has been 

changed, you should override it and adjust Actor::obj pointer for all actors

   // update

   virtual Bool update(); // update, return false when object wants to be deleted, and true if wants to exist

   // draw

   virtual UInt drawPrepare(); // prepare for drawing, this will be called in RM_PREPARE mode, in this method you should add the meshes to the draw list (Mesh::draw), and return a combination of bits of which additional render modes will be required for custom drawing of the object (for example "return IndexToFlag(RM_BLEND)" requests blend mode rendering)

   virtual void drawShadow (); // in this method you should add the meshes to the shadow draw list (Mesh::drawShadow)

   // io

   virtual void save(File &f); // save

   virtual Bool load(File &f); // load, false on fail

  ~Animatable();

   Animatable();

protected:

   Matrix _matrix;

};

So, I've tried the normal access to a struct variable namestruct.namevariable but without
success. The -> too doesn't show me the properties, and the word Animatables is not either
recognised to be a variable, am I missing something?

Driklyn · 05-10-2011 08:43 AM

You probably shouldn't call the clicked object Animatables since Animatables is already defined as the ObjMemx.

Code:

if(Game::Animatable *animatable=CAST(Game::Animatable,phys_hit.obj))

{

    animatable->

}

WiLLyRS · 05-10-2011 03:01 PM

can't believe it was for that .-.
thanks! I'm a master in stupid errors pfft

Now that i can access the struct's function I've got another question... Ok, i can use the variables and the function declared in the struct, but how about the parameters added to the object with the world editor?

Driklyn · 05-10-2011 07:29 PM

Either by creating a custom class like in "EsenthelEngineSDK\Tutorials\Source\Advanced\4 - Demos, Game Basics\Game Basics\08 - Custom Parameters.cpp" or load in a .obj file directly wherever you need it:

Code:

Game::ObjParams obj = *Game::Objs.ptrRequire("Obj/chr/Human/0.obj");

Str name;

if (Param *param = obj.findParam("Name")) name = param->asText();

WiLLyRS · 05-10-2011 08:10 PM

Mmh, *trying to find how the world loading works* so when I load the world objects with
.setObjType(Animatables, OBJ_ANIMATABLE) it automatically create this class with the attributed that I've set in the world editor?
if it is the case, I have the

Code:

if(Game::Animatable *clicked=CAST(Game::Animatable,phys_hit.obj))

which contain the pointer to the animatable object that I have clicked and the code to take these

Code:

if (Param *param = obj.findParam("Name")) name = param->asText();

but "clicked" doesn't have the findParam options, in fact if I "clicked." VS2010 tells me that there aren't any member that can be applied to "clicked" :\

Driklyn · 05-12-2011 03:55 AM

Parameters are not automatically loaded. They are given to you in the create method of an Obj class. From the tutorial:

Code:

void Item::create(Game::ObjParams &obj)

{

    super::create(obj); // default create

    // now setup custom parameters from 'obj'

    if(Param *par=obj.findParam("name" ))Set(name ,par->asText());

    if(Param *par=obj.findParam("value"))    value=par->asInt () ;

}

If you want to do it this way so you can store the params as a variable on the object itself, you will need to create a custom class:

Code:

struct Animatable : Game::Animatable

{

    var name;

    void Animatable::create(Game::ObjParams &obj)

    {

        super::create(obj);

        if(Param *par=obj.findParam("name" )) name = par->asText();

    }

}

Game::ObjMemx<Animatable> Animatables;

Then:

Code:

if(Animatable *clicked=CAST(Animatable,phys_hit.obj))

{

    clicked->name

}

This is probably the way to go, but if you only need to access a certain parameter and don't want to make a custom class just for that, you can load the .obj file directly in the code and access it that way, like so:

Code:

if(Game::Animatable *clicked=CAST(Game::Animatable,phys_hit.obj))

{

    Game::ObjParams obj = *Game::Objs.ptrRequire("Obj/path/to/obj/0.obj");

    Str name = S;

    if (Param *param = obj.findParam("Name")) name = param->asText();

}

WiLLyRS · 05-12-2011 07:32 PM

Thanks, now I've understood ^^

WiLLyRS · 05-13-2011 01:44 PM

Sorry for the double post, I've tried the first way, by creating a custom class.
I've made an animatables.h file that contain the definiction of the struct (this is the tutorial version, but I've tried too with yours:

Code:

#ifndef _GAME_ANIMATABLES_H

#define _GAME_ANIMATABLES_H

/******************************/

STRUCT(Animatable, Game::Animatable)

//{

    Char name[20];

    virtual void create (Game::ObjParams &obj);    //extend default creation

    //constructor

    Animatable();

};

/*******************/

#endif

and an animatables.cpp

Code:

#include "stdafx.h"

#include "../Main.h"

/****************/

void Game::Animatable::create(Game::ObjParams &obj)

{

    super::create(obj);    //default creation

    //now adding the custom param

    if(Param *par=obj.findParam("name" ))Set(name ,par->asText());

}

/****************/

Game::Animatable::Animatable()

{

    //initializing

    name[0] = 0;

}

The error is on "name" in the .cpp, it tells me that it's not declared :\

Dynad · 05-13-2011 03:18 PM

Remove the "Game::" in your cpp file... its looking probably in the wrong class. But you need to reference it to your custom class.

WiLLyRS · 05-13-2011 03:28 PM

Finally it works! Thanks a lot guys wink

Clicked Object Properties
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