AIManager.h

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/*
   Copyright (c) 2018 DIVIDE-Studio
   Copyright (c) 2009 Ionut Cava
 
   This file is part of DIVIDE Framework.
 
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software
   and associated documentation files (the "Software"), to deal in the Software
   without restriction,
   including without limitation the rights to use, copy, modify, merge, publish,
   distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so,
   subject to the following conditions:
 
   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.
 
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED,
   INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
   PARTICULAR PURPOSE AND NONINFRINGEMENT.
   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
   DAMAGES OR OTHER LIABILITY,
   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
   IN CONNECTION WITH THE SOFTWARE
   OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 */
 
#pragma once
#ifndef DVD_AI_MANAGER_H_
#define DVD_AI_MANAGER_H_
 
#include "AI/Headers/AIEntity.h"
#include "Scenes/Headers/SceneComponent.h"
 
namespace Divide {
 
class Scene;
struct Task;
class TaskPool;
 
namespace GFX {
    class CommandBuffer;
 
    struct MemoryBarrierCommand;
} //namespace GFX
 
namespace AI {
 
namespace Navigation {
    class NavigationMesh;
} //namespace Navigation
 
class AIManager final : public SceneComponent
{
  public:
    using AITeamMap = hashMap<U32, std::unique_ptr<AITeam>>;
    using NavMeshMap = hashMap<AIEntity::PresetAgentRadius, std::unique_ptr<Navigation::NavigationMesh>>;
 
    explicit AIManager(Scene& parentScene, TaskPool& pool);
    ~AIManager();
 
    void destroy();
    void update(U64 deltaTimeUS);
    bool registerEntity(U32 teamID, AIEntity* entity);
    void unregisterEntity(U32 teamID, AIEntity* entity);
    void unregisterEntity(AIEntity* entity);
    inline AITeam* getTeamByID(const U32 AITeamID)
    {
        if (AITeamID != U32_MAX)
        {
            const AITeamMap::const_iterator it = _aiTeams.find(AITeamID);
            if (it != std::end(_aiTeams))
            {
                return it->second.get();
            }
        }
        return nullptr;
    }
    Navigation::NavigationMesh* addNavMesh( PlatformContext& context, Navigation::DivideRecast& recastInterface, Scene& parentScene, AIEntity::PresetAgentRadius radius );
    bool destroyNavMesh( AIEntity::PresetAgentRadius radius );
 
    inline Navigation::NavigationMesh* getNavMesh(const AIEntity::PresetAgentRadius radius) const
    {
        const NavMeshMap::const_iterator it = _navMeshes.find(radius);
        if (it != std::end(_navMeshes))
        {
            return it->second.get();
        }
        return nullptr;
    }
 
    inline void setSceneCallback(const DELEGATE<void>& callback)
    {
        LockGuard<Mutex> w_lock(_updateMutex);
        _sceneCallback = callback;
    }
    void pauseUpdate(const bool state) noexcept { _pauseUpdate = state; }
    bool updatePaused() const noexcept { return _pauseUpdate; }
    bool updating() const noexcept { return _updating; }
    void debugDraw(GFX::CommandBuffer& bufferInOut,
                   GFX::MemoryBarrierCommand& memCmdInOut,
                   bool forceAll = true);
    bool isDebugDraw() const noexcept { return _navMeshDebugDraw; }
    void toggleNavMeshDebugDraw(bool state);
    bool navMeshDebugDraw() const noexcept { return _navMeshDebugDraw; }
 
    void stop() noexcept { _shouldStop = true; }
 
    bool running() const noexcept { return _running; }
 
    AITeam* registerTeam( U32 id );
    bool unregisterTeam( U32 id);
 
  protected:
    friend class AITeam;
 
    bool shouldStop() const noexcept;
 
  private:
    bool processInput(U64 deltaTimeUS);    
    bool processData(U64 deltaTimeUS);     
    bool updateEntities(U64 deltaTimeUS);  
 
  private:
    TaskPool& _parentPool;
    U64 _deltaTimeUS, _currentTimeUS, _previousTimeUS;
    std::atomic_bool _navMeshDebugDraw;
    std::atomic_bool _pauseUpdate;
    std::atomic_bool _updating;
    std::atomic_bool _shouldStop;
    std::atomic_bool _running;
    NavMeshMap _navMeshes;
    AITeamMap _aiTeams;
    mutable Mutex _updateMutex;
    mutable SharedMutex _navMeshMutex;
    DELEGATE<void> _sceneCallback;
 
};
 
FWD_DECLARE_MANAGED_CLASS(AIManager);
 
}  // namespace AI
}  // namespace Divide
 
#endif //DVD_AI_MANAGER_H_