core/EntityComponent.cpp

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// /////////////////////////////////////////////////////////////////////////////
//
// Name:            EntityComponent.cpp
// Author:          Michael Bartsch (ZCCdark203)
//
// Desc :           Abstraction base class for adding new functionalities to
//                  entities.
//
// License:         Copyright (C) 2009 Michael Bartsch and Contributors
//
//                  This program is free software: you can redistribute it
//                  and/or modify it under the terms of the zlib/libpng License.
//                  See main.cpp for conditions of distribution and use.
//
// /////////////////////////////////////////////////////////////////////////////

// Include files
#include "EntityComponent.h"


// EntityComponent class
// Static variables.
u32 EntityComponent::mIDCount = 0;

// EntityComponent constructor.
EntityComponent::EntityComponent(Entity *parent)
: mRefCount(1)
{
    // Get new unique ID.
    mID = mIDCount++;

    // Check if we got a valid pointer.
    if(parent != NULL)
    {
       if(parent->addComponent(this))
         pParent = parent;

       else pParent = NULL;
    }

    else pParent = NULL;
}

// EntityComponent deconstructor.
EntityComponent::~EntityComponent()
{
}

// AngelScript: Will be used to instanciate objects of this class.
EntityComponent* EntityComponent::refFactory(Entity* parent)
{
    return new EntityComponent(parent);
}

// Angelscript: Increases the reference counter.
void EntityComponent::refAdd()
{
    mRefCount++;
}

// Angelscript: Decreases the reference counter.
void EntityComponent::refRelease()
{
    if(--mRefCount == 0)
    {
       if(pParent != NULL)
       {
         if(!pParent->removeComponent(this))
           delete this;
       }

       else delete this;
    }
}

// Gets the ID of the component.
u32 EntityComponent::getID() const
{
    return mID;
}

// Sets the name of the component.
void EntityComponent::setName(const std::string &name)
{
    mName = name;
}

// Gets the name of the component.
const std::string& EntityComponent::getName() const
{
    return mName;
}

// Gets the parent of this component.
const Entity* EntityComponent::getParent()
{
    return pParent;
}


// EntityComponent Angelscript binding.
void bindEntityComponent(asIScriptEngine *engine)
{
    // Forward declarations.
    int r;

    // Bind EntityComponent class (and dependencies).
    r = engine->RegisterObjectType("EntityComponent", sizeof(EntityComponent), asOBJ_REF);
    r = engine->RegisterObjectType("Entity", sizeof(Entity), asOBJ_REF);

    // Get EntityComponent base functions.
    bindEntityComponentBase<EntityComponent>(engine, "EntityComponent");

    // Set EntityComponent behaviour.
    r = engine->RegisterObjectBehaviour("EntityComponent", asBEHAVE_FACTORY, "EntityComponent@ f(Entity @)",
                                        asFUNCTION(EntityComponent::refFactory), asCALL_CDECL); assert(r >= 0);
}

// End of File

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