1 files changed, 177 insertions, 0 deletions
diff --git a/src/entities/Physical.h b/src/entities/Physical.h
new file mode 100644
index 0000000..926b976
--- /dev/null
+++ b/src/entities/Physical.h
@@ -0,0 +1,177 @@
+#pragma once
+
+#include "Lists.h"
+#include "Timer.h"
+#include "Entity.h"
+
+enum {
+	PHYSICAL_MAX_COLLISIONRECORDS = 6
+};
+
+#define GRAVITY (0.008f)
+
+class CTreadable;
+
+class CPhysical : public CEntity
+{
+public:
+	// The not properly indented fields haven't been checked properly yet
+
+	int32 m_audioEntityId;
+	float m_phys_unused1;
+	uint32 m_nLastTimeCollided;
+	CVector m_vecMoveSpeed;		// velocity
+	CVector m_vecTurnSpeed;		// angular velocity
+	CVector m_vecMoveFriction;
+	CVector m_vecTurnFriction;
+	CVector m_vecMoveSpeedAvg;
+	CVector m_vecTurnSpeedAvg;
+	float m_fMass;
+	float m_fTurnMass;	// moment of inertia
+	float m_fForceMultiplier;
+	float m_fAirResistance;
+	float m_fElasticity;
+	float m_fBuoyancy;
+	CVector m_vecCentreOfMass;
+	CEntryInfoList m_entryInfoList;
+	CPtrNode *m_movingListNode;
+
+	int8 m_phys_unused2;
+	uint8 m_nStaticFrames;
+	uint8 m_nCollisionRecords;
+	CEntity *m_aCollisionRecords[PHYSICAL_MAX_COLLISIONRECORDS];
+
+	float m_fDistanceTravelled;
+
+	// damaged piece
+	float m_fDamageImpulse;
+	CEntity *m_pDamageEntity;
+	CVector m_vecDamageNormal;
+	int16 m_nDamagePieceType;
+
+	uint8 bIsHeavy : 1;
+	uint8 bAffectedByGravity : 1;
+	uint8 bInfiniteMass : 1;
+	uint8 m_phy_flagA08 : 1;
+	uint8 bIsInWater : 1;
+	uint8 m_phy_flagA20 : 1; // unused
+	uint8 bHitByTrain : 1;
+	uint8 bSkipLineCol : 1;
+
+	uint8 bIsFrozen : 1;
+	uint8 bDontLoadCollision : 1;
+	uint8 m_bIsVehicleBeingShifted : 1;	// wrong name - also used on but never set for peds
+	uint8 bJustCheckCollision : 1;	// just see if there is a collision
+
+	uint8 m_nSurfaceTouched;
+	int8 m_nZoneLevel;
+
+	CPhysical(void);
+	~CPhysical(void);
+
+	// from CEntity
+	void Add(void);
+	void Remove(void);
+	CRect GetBoundRect(void);
+	void ProcessControl(void);
+	void ProcessShift(void);
+	void ProcessCollision(void);
+
+	virtual int32 ProcessEntityCollision(CEntity *ent, CColPoint *colpoints);
+
+	void RemoveAndAdd(void);
+	void AddToMovingList(void);
+	void RemoveFromMovingList(void);
+	void SetDamagedPieceRecord(uint16 piece, float impulse, CEntity *entity, CVector dir);
+	void AddCollisionRecord(CEntity *ent);
+	void AddCollisionRecord_Treadable(CEntity *ent);
+	bool GetHasCollidedWith(CEntity *ent);
+	void RemoveRefsToEntity(CEntity *ent);
+	static void PlacePhysicalRelativeToOtherPhysical(CPhysical *other, CPhysical *phys, CVector localPos);
+
+	// get speed of point p relative to entity center
+	CVector GetSpeed(const CVector &r);
+	CVector GetSpeed(void) { return GetSpeed(CVector(0.0f, 0.0f, 0.0f)); }
+	float GetMass(const CVector &pos, const CVector &dir) {
+		return 1.0f / (CrossProduct(pos, dir).MagnitudeSqr()/m_fTurnMass +
+		               1.0f/m_fMass);
+	}
+	float GetMassTweak(const CVector &pos, const CVector &dir, float t) {
+		return 1.0f / (CrossProduct(pos, dir).MagnitudeSqr()/(m_fTurnMass*t) +
+		               1.0f/(m_fMass*t));
+	}
+	void UnsetIsInSafePosition(void) {
+		m_vecMoveSpeed *= -1.0f;
+		m_vecTurnSpeed *= -1.0f;
+		ApplyTurnSpeed();
+		ApplyMoveSpeed();
+		m_vecMoveSpeed *= -1.0f;
+		m_vecTurnSpeed *= -1.0f;
+		bIsInSafePosition = false;	
+	}
+
+	const CVector &GetMoveSpeed() { return m_vecMoveSpeed; }
+	void SetMoveSpeed(float x, float y, float z) {
+		m_vecMoveSpeed.x = x;
+		m_vecMoveSpeed.y = y;
+		m_vecMoveSpeed.z = z;
+	}
+	void SetMoveSpeed(const CVector& speed) {
+		m_vecMoveSpeed = speed;
+	}
+	void AddToMoveSpeed(float x, float y, float z) {
+		m_vecMoveSpeed.x += x;
+		m_vecMoveSpeed.y += y;
+		m_vecMoveSpeed.z += z;
+	}
+	void AddToMoveSpeed(const CVector& addition) {
+		m_vecMoveSpeed += addition;
+	}
+	void AddToMoveSpeed(const CVector2D& addition) {
+		m_vecMoveSpeed += CVector(addition.x, addition.y, 0.0f);
+	}
+	const CVector &GetTurnSpeed() { return m_vecTurnSpeed; }
+	void SetTurnSpeed(float x, float y, float z) {
+		m_vecTurnSpeed.x = x;
+		m_vecTurnSpeed.y = y;
+		m_vecTurnSpeed.z = z;
+	}
+	const CVector &GetCenterOfMass() { return m_vecCentreOfMass; }
+	void SetCenterOfMass(float x, float y, float z) {
+		m_vecCentreOfMass.x = x;
+		m_vecCentreOfMass.y = y;
+		m_vecCentreOfMass.z = z;
+	}
+
+	void ApplyMoveSpeed(void);
+	void ApplyTurnSpeed(void);
+	// Force actually means Impulse here
+	void ApplyMoveForce(float jx, float jy, float jz);
+	void ApplyMoveForce(const CVector &j) { ApplyMoveForce(j.x, j.y, j.z); }
+	// j(x,y,z) is direction of force, p(x,y,z) is point relative to model center where force is applied
+	void ApplyTurnForce(float jx, float jy, float jz, float px, float py, float pz);
+	// j is direction of force, p is point relative to model center where force is applied
+	void ApplyTurnForce(const CVector &j, const CVector &p) { ApplyTurnForce(j.x, j.y, j.z, p.x, p.y, p.z); }
+	void ApplyFrictionMoveForce(float jx, float jy, float jz);
+	void ApplyFrictionMoveForce(const CVector &j) { ApplyFrictionMoveForce(j.x, j.y, j.z); }
+	void ApplyFrictionTurnForce(float jx, float jy, float jz, float rx, float ry, float rz);
+	void ApplyFrictionTurnForce(const CVector &j, const CVector &p) { ApplyFrictionTurnForce(j.x, j.y, j.z, p.x, p.y, p.z); }
+	// springRatio: 1.0 fully extended, 0.0 fully compressed
+	bool ApplySpringCollision(float springConst, CVector &springDir, CVector &point, float springRatio, float bias);
+	bool ApplySpringCollisionAlt(float springConst, CVector &springDir, CVector &point, float springRatio, float bias, CVector &forceDir);
+	bool ApplySpringDampening(float damping, CVector &springDir, CVector &point, CVector &speed);
+	void ApplyGravity(void);
+	void ApplyFriction(void);
+	void ApplyAirResistance(void);
+	bool ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, float &impulseB);
+	bool ApplyCollision(CColPoint &colpoint, float &impulse);
+	bool ApplyCollisionAlt(CEntity *B, CColPoint &colpoint, float &impulse, CVector &moveSpeed, CVector &turnSpeed);
+	bool ApplyFriction(CPhysical *B, float adhesiveLimit, CColPoint &colpoint);
+	bool ApplyFriction(float adhesiveLimit, CColPoint &colpoint);
+
+	bool ProcessShiftSectorList(CPtrList *ptrlists);
+	bool ProcessCollisionSectorList_SimpleCar(CPtrList *lists);
+	bool ProcessCollisionSectorList(CPtrList *lists);
+	bool CheckCollision(void);
+	bool CheckCollision_SimpleCar(void);
+};