From 600bf0351476a5a21aabb5429132ddf7f52ac0b9 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Wed, 15 May 2019 16:52:37 +0200
Subject: first commit

---
 src/entities/Physical.h | 137 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 src/entities/Physical.h

(limited to 'src/entities/Physical.h')

diff --git a/src/entities/Physical.h b/src/entities/Physical.h
new file mode 100644
index 00000000..681ab5c8
--- /dev/null
+++ b/src/entities/Physical.h
@@ -0,0 +1,137 @@
+#pragma once
+
+#include "Lists.h"
+#include "Entity.h"
+#include "Treadable.h"
+
+enum {
+	PHYSICAL_MAX_COLLISIONRECORDS = 6
+};
+
+class CPhysical : public CEntity
+{
+public:
+	// The not properly indented fields haven't been checked properly yet
+
+  int uAudioEntityId;
+  float unk1;
+	CTreadable *m_carTreadable;
+	CTreadable *m_pedTreadable;
+	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 fForceMultiplier;
+	float m_fAirResistance;
+	float m_fElasticity;
+  float fPercentSubmerged;
+	CVector m_vecCentreOfMass;
+	CEntryInfoList m_entryInfoList;
+	CPtrNode *m_movingListNode;
+
+  char field_EC;
+	uint8 m_nStaticFrames;
+	uint8 m_nCollisionRecords;
+  char field_EF;
+	CEntity *m_aCollisionRecords[PHYSICAL_MAX_COLLISIONRECORDS];
+
+	float m_fDistanceTravelled;
+
+	// damaged piece
+	float m_fCollisionImpulse;
+	CEntity *m_pCollidingEntity;
+	CVector m_vecCollisionDirection;
+	int16 m_nCollisionPieceType;
+
+	uint8 m_phy_flagA1 : 1;
+	uint8 bAffectedByGravity : 1;
+	uint8 bInfiniteMass : 1;
+	uint8 m_phy_flagA8 : 1;
+	uint8 m_phy_flagA10 : 1;
+	uint8 m_phy_flagA20 : 1;
+	uint8 m_phy_flagA40 : 1;
+	uint8 m_phy_flagA80 : 1;
+
+	uint8 m_phy_flagB1 : 1;
+	uint8 m_phy_flagB2 : 1;
+	uint8 m_phy_flagB4 : 1;
+	uint8 m_phy_flagB8 : 1;
+	uint8 m_phy_flagB10 : 1;
+	uint8 m_phy_flagB20 : 1;
+	uint8 m_phy_flagB40 : 1;
+	uint8 m_phy_flagB80 : 1;
+
+  char byteLastCollType;
+  char byteZoneLevel;
+  int16 pad;
+
+
+	// from CEntity
+	void Add(void);
+	void Remove(void);
+	CRect GetBoundRect(void);
+	void ProcessControl(void);
+
+	void RemoveAndAdd(void);
+	void AddToMovingList(void);
+	void RemoveFromMovingList(void);
+
+	// 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 GetMassTime(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;	
+	}
+
+	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); }
+	// v(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 rx, float ry, float rz);
+	// v 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); }
+	void ApplySpringCollision(float f1, CVector &v, CVector &p, float f2, float f3);
+	void ApplyGravity(void);
+	void ApplyFriction(void);
+	void ApplyAirResistance(void);
+	bool ApplyCollision(CPhysical *B, CColPoint &colpoint, float &impulseA, float &impulseB);
+	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);
+
+	void AddCollisionRecord(CEntity *ent);
+	void AddCollisionRecord_Treadable(CEntity *ent);
+	bool GetHasCollidedWith(CEntity *ent);
+
+	// to make patching virtual functions possible
+	void Add_(void) { CPhysical::Add(); }
+	void Remove_(void) { CPhysical::Remove(); }
+	CRect GetBoundRect_(void) { return CPhysical::GetBoundRect(); }
+	void ProcessControl_(void) { CPhysical::ProcessControl(); }
+};
+static_assert(sizeof(CPhysical) == 0x128, "CPhysical: error");
-- 
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