i_game_object.hpp

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// i_game_object.hpp
/*
  neogfx C++ GUI Library
  Copyright (c) 2015 Leigh Johnston.  All Rights Reserved.
  
  This program is free software: you can redistribute it and / or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once

#include <neogfx/neogfx.hpp>
#include <neolib/uuid.hpp>

namespace neogfx
{
    enum class object_category
    {
        Sprite,
        PhysicalObject,
        Custom,
        Shape // Shape must sort last
    };

    typedef neolib::uuid object_type;

    class i_shape;
    class i_collidable_object;
    class i_physical_object;

    class i_game_object
    {
    public:
        struct not_a_shape : std::logic_error { not_a_shape() : std::logic_error("neogfx::i_game_object::not_a_shape") {} };
        struct not_a_collidable_object : std::logic_error { not_a_collidable_object() : std::logic_error("neogfx::i_game_object::not_a_collidable_object") {} };
        struct not_a_physical_object : std::logic_error { not_a_physical_object() : std::logic_error("neogfx::i_game_object::not_a_physical_object") {} };
        struct not_implemented : std::logic_error { not_implemented() : std::logic_error("neogfx::i_game_object::not_implemented") {} };
    public:
        virtual ~i_game_object() {}
    public:
        virtual object_category category() const = 0;
        virtual const i_shape& as_shape() const = 0;
        virtual i_shape& as_shape() = 0;
        virtual const i_collidable_object& as_collidable_object() const = 0;
        virtual i_collidable_object& as_collidable_object() = 0;
        virtual const i_physical_object& as_physical_object() const = 0;
        virtual i_physical_object& as_physical_object() = 0;
        virtual const object_type& type() const { static object_type sNullTypeId = {}; return sNullTypeId; }
        virtual bool killed() const = 0;
        virtual void kill() = 0;
    };
}