Differential D4439 Diff 19462 source/simulation2/components/CCmpUnitMotionManager.h

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source/simulation2/components/CCmpUnitMotionManager.h

	/* Copyright (C) 2021 Wildfire Games.			/* Copyright (C) 2022 Wildfire Games.
	* This file is part of 0 A.D.			* This file is part of 0 A.D.
	*			*
	* 0 A.D. is free software: you can redistribute it and/or modify			* 0 A.D. is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by			* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 2 of the License, or			* the Free Software Foundation, either version 2 of the License, or
	* (at your option) any later version.			* (at your option) any later version.
	*			*
	* 0 A.D. is distributed in the hope that it will be useful,			* 0 A.D. is distributed in the hope that it will be useful,
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	#include "simulation2/helpers/Grid.h"			#include "simulation2/helpers/Grid.h"
	#include "simulation2/system/EntityMap.h"			#include "simulation2/system/EntityMap.h"

	class CCmpUnitMotion;			class CCmpUnitMotion;

	class CCmpUnitMotionManager : public ICmpUnitMotionManager			class CCmpUnitMotionManager : public ICmpUnitMotionManager
	{			{
	public:			public:
	static void ClassInit(CComponentManager& componentManager)			static void ClassInit(CComponentManager& componentManager);
	{
	componentManager.SubscribeToMessageType(MT_TerrainChanged);
	componentManager.SubscribeToMessageType(MT_TurnStart);
	componentManager.SubscribeToMessageType(MT_Update_Final);
	componentManager.SubscribeToMessageType(MT_Update_MotionUnit);
	componentManager.SubscribeToMessageType(MT_Update_MotionFormation);
	}

	DEFAULT_COMPONENT_ALLOCATOR(UnitMotionManager)			DEFAULT_COMPONENT_ALLOCATOR(UnitMotionManager)

	// Persisted state for each unit.			// Persisted state for each unit.
	struct MotionState			struct MotionState
	{			{
	MotionState(CmpPtr<ICmpPosition> cmpPos, CCmpUnitMotion* cmpMotion);			MotionState(ICmpPosition* cmpPos, CCmpUnitMotion* cmpMotion);

	// Component references - these must be kept alive for the duration of motion.			// Component references - these must be kept alive for the duration of motion.
	// NB: this is generally not something one should do, but because of the tight coupling here it's doable.			// NB: this is generally a super dangerous thing to do,
	CmpPtr<ICmpPosition> cmpPosition;			// but the tight coupling with CCmpUnitMotion makes it workable.
				// NB: this assumes that components do _not_ move in memory,
				// which is currently a fair assumption but might change in the future.
				ICmpPosition* cmpPosition;
				StanUnsubmitted Not Done Inline Actions unique/shared ptr? Stan: unique/shared ptr?
				wraitiiAuthorUnsubmitted Done Inline Actions Not applicable, this is not an owning pointer at all. wraitii: Not applicable, this is not an owning pointer at all.
				StanUnsubmitted Not Done Inline Actions I mean the heading comment is literally famous last words so was wondering if we had any way to make it safer :) Stan: I mean the heading comment is literally famous last words so was wondering if we had any way to…
	CCmpUnitMotion* cmpUnitMotion;			CCmpUnitMotion* cmpUnitMotion;

	// Position before units start moving			// Position before units start moving
	CFixedVector2D initialPos;			CFixedVector2D initialPos;
	// Transient position during the movement.			// Transient position during the movement.
	CFixedVector2D pos;			CFixedVector2D pos;

	// Accumulated "pushing" from nearby units.			// Accumulated "pushing" from nearby units.
	CFixedVector2D push;			CFixedVector2D push;

	fixed speed;			fixed speed;

	fixed initialAngle;			fixed initialAngle;
	fixed angle;			fixed angle;

	// Used for formations - units with the same control group won't push at a distance.			// Used for formations - units with the same control group won't push at a distance.
	// (this is required because formations may be tight and large units may end up never settling.			// (this is required because formations may be tight and large units may end up never settling.
	entity_id_t controlGroup = INVALID_ENTITY;			entity_id_t controlGroup = INVALID_ENTITY;

				// This is a ad-hoc counter to store under how much pushing 'pressure' an entity is.
				// More pressure will slow the unit down and make it harder to push,
				// which effectively bogs down groups of colliding units.
				uint8_t pushingPressure = 0;

	// Meta-flag -> this entity won't push nor be pushed.			// Meta-flag -> this entity won't push nor be pushed.
	// (used for entities that have their obstruction disabled).			// (used for entities that have their obstruction disabled).
	bool ignore = false;			bool ignore = false;

	// If true, the entity needs to be handled during movement.			// If true, the entity needs to be handled during movement.
	bool needUpdate = false;			bool needUpdate = false;

	bool wentStraight = false;			bool wentStraight = false;
	bool wasObstructed = false;			bool wasObstructed = false;

	// Clone of the obstruction manager flag for efficiency			// Clone of the obstruction manager flag for efficiency
	bool isMoving = false;			bool isMoving = false;
	};			};

	// "Template" state, not serialized (cannot be changed mid-game).			// "Template" state, not serialized (cannot be changed mid-game).

	// Multiplier for the pushing radius. Pre-multiplied by the circle-square correction factor.			// The maximal distance at which units push each other is the combined unit clearances, multipled by this factor,
	entity_pos_t m_PushingRadius;			// itself pre-multiplied by the circle-square correction factor.
	// Additive modifiers to the pushing radius for moving units and idle units respectively.			entity_pos_t m_PushingRadiusMultiplier;
				// Additive modifiers to the maximum pushing distance for moving units and idle units respectively.
	entity_pos_t m_MovingPushExtension;			entity_pos_t m_MovingPushExtension;
	entity_pos_t m_StaticPushExtension;			entity_pos_t m_StaticPushExtension;
				// Multiplier for the pushing 'spread'.
				// This should be understand as the % of the maximum distance where pushing will be "in full force".
				entity_pos_t m_PushingSpread;

	// Pushing forces below this value are ignored - this prevents units moving forever by very small increments.			// Pushing forces below this value are ignored - this prevents units moving forever by very small increments.
	entity_pos_t m_MinimalPushing;			entity_pos_t m_MinimalPushing;

				// Multiplier for pushing pressure strength.
				entity_pos_t m_PushingPressureStrength;
				// Per-turn reduction in pushing pressure.
				entity_pos_t m_PushingPressureDecay;

	// These vectors are reconstructed on deserialization.			// These vectors are reconstructed on deserialization.

	EntityMap<MotionState> m_Units;			EntityMap<MotionState> m_Units;
	EntityMap<MotionState> m_FormationControllers;			EntityMap<MotionState> m_FormationControllers;

	// Turn-local state below, not serialised.			// Turn-local state below, not serialised.

	Grid<std::vector<EntityMap<MotionState>::iterator>> m_MovingUnits;			Grid<std::vector<EntityMap<MotionState>::iterator>> m_MovingUnits;
	bool m_ComputingMotion;			bool m_ComputingMotion;

	static std::string GetSchema()			static std::string GetSchema()
	{			{
	return "<a:component type='system'/><empty/>";			return "<a:component type='system'/><empty/>";
	}			}

	virtual void Init(const CParamNode& UNUSED(paramNode));			virtual void Init(const CParamNode& UNUSED(paramNode));

	virtual void Deinit()			virtual void Deinit()
	{			{
	}			}

	virtual void Serialize(ISerializer& UNUSED(serialize))			virtual void Serialize(ISerializer& serialize);
	{			virtual void Deserialize(const CParamNode& paramNode, IDeserializer& deserialize);
	}

	virtual void Deserialize(const CParamNode& paramNode, IDeserializer& UNUSED(deserialize))			virtual void HandleMessage(const CMessage& msg, bool global);
	{
	Init(paramNode);
	ResetSubdivisions();
	}

	virtual void HandleMessage(const CMessage& msg, bool UNUSED(global))
	{
	switch (msg.GetType())
	{
	case MT_TerrainChanged:
	{
	CmpPtr<ICmpTerrain> cmpTerrain(GetSystemEntity());
	if (cmpTerrain->GetVerticesPerSide() != m_MovingUnits.width())
	ResetSubdivisions();
	break;
	}
	case MT_TurnStart:
	{
	OnTurnStart();
	break;
	}
	case MT_Update_MotionFormation:
	{
	fixed dt = static_cast<const CMessageUpdate_MotionFormation&>(msg).turnLength;
	m_ComputingMotion = true;
	MoveFormations(dt);
	m_ComputingMotion = false;
	break;
	}
	case MT_Update_MotionUnit:
	{
	fixed dt = static_cast<const CMessageUpdate_MotionUnit&>(msg).turnLength;
	m_ComputingMotion = true;
	MoveUnits(dt);
	m_ComputingMotion = false;
	break;
	}
	}
	}

	virtual void Register(CCmpUnitMotion* component, entity_id_t ent, bool formationController);			virtual void Register(CCmpUnitMotion* component, entity_id_t ent, bool formationController);
	virtual void Unregister(entity_id_t ent);			virtual void Unregister(entity_id_t ent);

	virtual bool ComputingMotion() const			virtual bool ComputingMotion() const
	{			{
	return m_ComputingMotion;			return m_ComputingMotion;
	}			}

	virtual bool IsPushingActivated() const			virtual bool IsPushingActivated() const
	{			{
	return m_PushingRadius != entity_pos_t::Zero();			return m_PushingRadiusMultiplier != entity_pos_t::Zero();
	}			}

	private:			private:
				void OnDeserialized();
	void ResetSubdivisions();			void ResetSubdivisions();
	void OnTurnStart();			void OnTurnStart();

	void MoveUnits(fixed dt);			void MoveUnits(fixed dt);
	void MoveFormations(fixed dt);			void MoveFormations(fixed dt);
	void Move(EntityMap<MotionState>& ents, fixed dt);			void Move(EntityMap<MotionState>& ents, fixed dt);

	void Push(EntityMap<MotionState>::value_type& a, EntityMap<MotionState>::value_type& b, fixed dt);			void Push(EntityMap<MotionState>::value_type& a, EntityMap<MotionState>::value_type& b, fixed dt);
	};			};

	void CCmpUnitMotionManager::ResetSubdivisions()
	{
	CmpPtr<ICmpTerrain> cmpTerrain(GetSystemEntity());
	if (!cmpTerrain)
	return;

	size_t size = cmpTerrain->GetMapSize();
	u16 gridSquareSize = static_cast<u16>(size / 20 + 1);
	m_MovingUnits.resize(gridSquareSize, gridSquareSize);
	}

	REGISTER_COMPONENT_TYPE(UnitMotionManager)			REGISTER_COMPONENT_TYPE(UnitMotionManager)

	#endif // INCLUDED_CCMPUNITMOTIONMANAGER			#endif // INCLUDED_CCMPUNITMOTIONMANAGER