MovementGenerator.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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 2 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/>.
 */
 
#ifndef TRINITY_MOVEMENTGENERATOR_H
#define TRINITY_MOVEMENTGENERATOR_H
 
#include "Define.h"
#include "FactoryHolder.h"
#include "MovementDefines.h"
#include "ObjectRegistry.h"
 
class Creature;
class Unit;
 
enum MovementGeneratorType : uint8;
 
enum MovementGeneratorFlags : uint16
{
 MOVEMENTGENERATOR_FLAG_NONE = 0x000,
 MOVEMENTGENERATOR_FLAG_INITIALIZATION_PENDING = 0x001,
 MOVEMENTGENERATOR_FLAG_INITIALIZED = 0x002,
 MOVEMENTGENERATOR_FLAG_SPEED_UPDATE_PENDING = 0x004,
 MOVEMENTGENERATOR_FLAG_INTERRUPTED = 0x008,
 MOVEMENTGENERATOR_FLAG_PAUSED = 0x010,
 MOVEMENTGENERATOR_FLAG_TIMED_PAUSED = 0x020,
 MOVEMENTGENERATOR_FLAG_DEACTIVATED = 0x040,
 MOVEMENTGENERATOR_FLAG_INFORM_ENABLED = 0x080,
 MOVEMENTGENERATOR_FLAG_FINALIZED = 0x100,
 MOVEMENTGENERATOR_FLAG_PERSIST_ON_DEATH = 0x200,
 
 MOVEMENTGENERATOR_FLAG_TRANSITORY = MOVEMENTGENERATOR_FLAG_SPEED_UPDATE_PENDING | MOVEMENTGENERATOR_FLAG_INTERRUPTED
};
 
class TC_GAME_API MovementGenerator
{
 public:
 explicit MovementGenerator() : Mode(0), Priority(0), Flags(MOVEMENTGENERATOR_FLAG_NONE), BaseUnitState(0) { }
 MovementGenerator(MovementGenerator const&) = delete;
 MovementGenerator(MovementGenerator&&) = delete;
 MovementGenerator& operator=(MovementGenerator const&) = delete;
 MovementGenerator& operator=(MovementGenerator&&) = delete;
 virtual ~MovementGenerator();
 
 // on top first update
 virtual void Initialize(Unit* owner) = 0;
 // on top reassign
 virtual void Reset(Unit* owner) = 0;
 // on top on MotionMaster::Update
 virtual bool Update(Unit* owner, uint32 diff) = 0;
 // on current top if another movement replaces
 virtual void Deactivate(Unit* owner) = 0;
 // on movement delete
 virtual void Finalize(Unit* owner, bool active, bool movementInform) = 0;
 virtual MovementGeneratorType GetMovementGeneratorType() const = 0;
 
 virtual void UnitSpeedChanged() { }
 // timer in ms
 virtual void Pause(uint32/* timer*/) { }
 // timer in ms
 virtual void Resume(uint32/* overrideTimer*/) { }
 // used by Evade code for select point to evade with expected restart default movement
 virtual bool GetResetPosition(Unit*, float&/* x*/, float&/* y*/, float&/* z*/) { return false; }
 
 void AddFlag(uint16 const flag) { Flags |= flag; }
 bool HasFlag(uint16 const flag) const { return (Flags & flag) != 0; }
 void RemoveFlag(uint16 const flag) { Flags &= ~flag; }
 
 virtual std::string GetDebugInfo() const;
 
 uint8 Mode;
 uint8 Priority;
 uint16 Flags;
 uint32 BaseUnitState;
};
 
template<class T, class D>
class MovementGeneratorMedium : public MovementGenerator
{
 public:
 void Initialize(Unit* owner) override
 {
 (static_cast<D*>(this))->DoInitialize(static_cast<T*>(owner));
 }
 
 void Reset(Unit* owner) override
 {
 (static_cast<D*>(this))->DoReset(static_cast<T*>(owner));
 }
 
 bool Update(Unit* owner, uint32 diff) override
 {
 return (static_cast<D*>(this))->DoUpdate(static_cast<T*>(owner), diff);
 }
 
 void Deactivate(Unit* owner) override
 {
 (static_cast<D*>(this))->DoDeactivate(static_cast<T*>(owner));
 }
 
 void Finalize(Unit* owner, bool active, bool movementInform) override
 {
 (static_cast<D*>(this))->DoFinalize(static_cast<T*>(owner), active, movementInform);
 }
};
 
typedef FactoryHolder<MovementGenerator, Unit, MovementGeneratorType> MovementGeneratorCreator;
 
template<class Movement>
struct MovementGeneratorFactory : public MovementGeneratorCreator
{
 MovementGeneratorFactory(MovementGeneratorType movementGeneratorType) : MovementGeneratorCreator(movementGeneratorType) { }
 
 MovementGenerator* Create(Unit* /*object*/) const override
 {
 return new Movement();
 }
};
 
struct IdleMovementFactory : public MovementGeneratorCreator
{
 IdleMovementFactory();
 
 MovementGenerator* Create(Unit* object) const override;
};
 
struct RandomMovementFactory : public MovementGeneratorCreator
{
 RandomMovementFactory();
 
 MovementGenerator* Create(Unit* object) const override;
};
 
struct WaypointMovementFactory : public MovementGeneratorCreator
{
 WaypointMovementFactory();
 
 MovementGenerator* Create(Unit* object) const override;
};
 
typedef MovementGeneratorCreator::FactoryHolderRegistry MovementGeneratorRegistry;
 
#define sMovementGeneratorRegistry MovementGeneratorRegistry::instance()
 
#endif