re3/src/weapons/ProjectileInfo.cpp

#include "common.h"

#include "Camera.h"
#include "General.h"
#include "Heli.h"
#include "ModelIndices.h"
#include "Particle.h"
#include "Ped.h"
#include "Plane.h"
#include "ProjectileInfo.h"
#include "Projectile.h"
#include "Explosion.h"
#include "Weapon.h"
#include "World.h"

#ifdef SQUEEZE_PERFORMANCE
uint32 projectileInUse;
#endif

CProjectileInfo gaProjectileInfo[NUM_PROJECTILES];
CProjectile *CProjectileInfo::ms_apProjectile[NUM_PROJECTILES];

#define PROJECTILE_BOUNDARY_MIN_X -2390.0f
#define PROJECTILE_BOUNDARY_MAX_X 1590.0f
#define PROJECTILE_BOUNDARY_MIN_Y -1990.0f
#define PROJECTILE_BOUNDARY_MAX_Y 1990.0f

void
CProjectileInfo::Initialise()
{
	debug("Initialising CProjectileInfo...\n");

	for (int i = 0; i < ARRAY_SIZE(ms_apProjectile); i++) {
		ms_apProjectile[i] = nil;
		gaProjectileInfo[i].m_eWeaponType = WEAPONTYPE_GRENADE;
		gaProjectileInfo[i].m_pSource = nil;
		gaProjectileInfo[i].m_nExplosionTime = 0;
		gaProjectileInfo[i].m_bInUse = false;
	}

	debug("CProjectileInfo ready\n");

#ifdef SQUEEZE_PERFORMANCE
	projectileInUse = 0;
#endif
}

void
CProjectileInfo::Shutdown()
{
	debug("Shutting down CProjectileInfo...\n");
	debug("CProjectileInfo shut down\n");
}

CProjectileInfo*
CProjectileInfo::GetProjectileInfo(int32 id)
{
	return &gaProjectileInfo[id];
}

bool
CProjectileInfo::AddProjectile(CEntity *entity, eWeaponType weapon, CVector pos, float speed)
{
	int8 SpecialCollisionResponseCase = COLLRESPONSE_NONE;
	bool gravity = true;
	CMatrix matrix;
	float elasticity = 0.75f;
	CPed* ped = (CPed*)entity;
	int time;
	CVector velocity;

	switch (weapon)
	{
		case WEAPONTYPE_ROCKET:
		{
			float vy = 0.35f;
			time = CTimer::GetTimeInMilliseconds() + 2000;
			if (entity->GetModelIndex() == MI_SPARROW || entity->GetModelIndex() == MI_HUNTER || entity->GetModelIndex() == MI_SENTINEL) {
				matrix = ped->GetMatrix();
				matrix.GetPosition() = pos;
				CVector vecSpeed = ((CPhysical*)entity)->m_vecMoveSpeed;
				vy += Max(0.0f, DotProduct(vecSpeed, entity->GetForward())) + Max(0.0f, DotProduct(vecSpeed, entity->GetUp()));
			} else {
				if (ped->IsPlayer()) {
					matrix.GetForward() = TheCamera.Cams[TheCamera.ActiveCam].Front;
					matrix.GetUp() = TheCamera.Cams[TheCamera.ActiveCam].Up;
					matrix.GetRight() = CrossProduct(TheCamera.Cams[TheCamera.ActiveCam].Up, TheCamera.Cams[TheCamera.ActiveCam].Front);
					matrix.GetPosition() = pos;
				} else if (ped->m_pSeekTarget != nil) {
					float ry = CGeneral::GetRadianAngleBetweenPoints(1.0f, ped->m_pSeekTarget->GetPosition().z, 1.0f, pos.z);
					float rz = Atan2(-ped->GetForward().x, ped->GetForward().y);
					vy = 0.35f * speed + 0.15f;
					matrix.SetTranslate(0.0f, 1.0f, 1.0f);
					matrix.Rotate(0.0f, ry, rz);
					matrix.GetPosition() += pos;
				} else {
					matrix = ped->GetMatrix();
				}
			}
			velocity = Multiply3x3(matrix, CVector(0.0f, vy, 0.0f));
			gravity = false;
			break;
		}
		case WEAPONTYPE_MOLOTOV:
		{
			time = CTimer::GetTimeInMilliseconds() + 2000;
			float scale = 0.22f * speed + 0.15f;
			if (scale < 0.2f)
				scale = 0.2f;
			float angle = Atan2(-ped->GetForward().x, ped->GetForward().y);
			matrix.SetTranslate(0.0f, 0.0f, 0.0f);
			matrix.RotateZ(angle);
			matrix.GetPosition() += pos;
			velocity.x = -1.0f * scale * Sin(angle);
			velocity.y = scale * Cos(angle);
			velocity.z = (0.2f * speed + 0.4f) * scale;
			break;
		}
		case WEAPONTYPE_TEARGAS:
		{
			time = CTimer::GetTimeInMilliseconds() + 20000;
			float scale = 0.0f;
			if (speed != 0.0f)
				scale = 0.22f * speed + 0.15f;
			float angle = Atan2(-ped->GetForward().x, ped->GetForward().y);
			matrix.SetTranslate(0.0f, 0.0f, 0.0f);
			matrix.RotateZ(angle);
			matrix.GetPosition() += pos;
			SpecialCollisionResponseCase = COLLRESPONSE_UNKNOWN5;
			velocity.x = -1.0f * scale * Sin(angle);
			velocity.y = scale * Cos(angle);
			velocity.z = (0.4f * speed + 0.4f) * scale;
			elasticity = 0.5f;
			break;
		}
		case WEAPONTYPE_GRENADE:
		case WEAPONTYPE_DETONATOR_GRENADE:
		{
			time = CTimer::GetTimeInMilliseconds() + 2000;
			float scale = 0.0f;
			if (speed != 0.0f)
				scale = 0.22f * speed + 0.15f;
			float angle = Atan2(-ped->GetForward().x, ped->GetForward().y);
			matrix.SetTranslate(0.0f, 0.0f, 0.0f);
			matrix.RotateZ(angle);
			matrix.GetPosition() += pos;
			SpecialCollisionResponseCase = COLLRESPONSE_UNKNOWN5;
			velocity.x = -1.0f * scale * Sin(angle);
			velocity.y = scale * Cos(angle);
			velocity.z = (0.4f * speed + 0.4f) * scale;
			elasticity = 0.5f;
			break;
		}
		default:
		Error("Undefined projectile type, AddProjectile, ProjectileInfo.cpp");
		break;
	}

	int i = 0;
#ifdef FIX_BUGS
	while (i < ARRAY_SIZE(gaProjectileInfo) && gaProjectileInfo[i].m_bInUse) i++;
#else
	// array overrun is UB
	while (gaProjectileInfo[i].m_bInUse && i < ARRAY_SIZE(gaProjectileInfo)) i++;
#endif
	if (i == ARRAY_SIZE(gaProjectileInfo))
		return false;

	switch (weapon)
	{
		case WEAPONTYPE_ROCKET:
		ms_apProjectile[i] = new CProjectile(MI_MISSILE);
		break;
		case WEAPONTYPE_TEARGAS:
		ms_apProjectile[i] = new CProjectile(MI_TEARGAS);
		break;
		case WEAPONTYPE_MOLOTOV:
		ms_apProjectile[i] = new CProjectile(MI_MOLOTOV);
		break;
		case WEAPONTYPE_GRENADE:
		case WEAPONTYPE_DETONATOR_GRENADE:
		ms_apProjectile[i] = new CProjectile(MI_GRENADE);
		break;
		default: break;
	}

	if (ms_apProjectile[i] == nil)
		return false;

	gaProjectileInfo[i].m_eWeaponType = weapon;
	gaProjectileInfo[i].m_pSource = ped;
	ms_apProjectile[i]->GetMatrix() = matrix;
	ms_apProjectile[i]->SetMoveSpeed(velocity);
	ms_apProjectile[i]->bAffectedByGravity = gravity;

	gaProjectileInfo[i].m_nExplosionTime = time;
	ms_apProjectile[i]->m_fElasticity = elasticity;
	ms_apProjectile[i]->m_nSpecialCollisionResponseCases = SpecialCollisionResponseCase;

#ifdef SQUEEZE_PERFORMANCE
	projectileInUse++;
#endif

	gaProjectileInfo[i].m_bInUse = true;
	CWorld::Add(ms_apProjectile[i]);

	gaProjectileInfo[i].m_vecPos = ms_apProjectile[i]->GetPosition();

	if (entity && entity->IsPed() && !ped->m_pCollidingEntity) {
		ped->m_pCollidingEntity = ms_apProjectile[i];
	}
	return true;
}

void
CProjectileInfo::RemoveProjectile(CProjectileInfo *info, CProjectile *projectile)
{
	// TODO(Miami): New parameter: 1
	switch (info->m_eWeaponType) {
		case WEAPONTYPE_GRENADE:
			CExplosion::AddExplosion(nil, info->m_pSource, EXPLOSION_GRENADE, projectile->GetPosition(), 0);
			break;
		case WEAPONTYPE_MOLOTOV:
			CExplosion::AddExplosion(nil, info->m_pSource, EXPLOSION_MOLOTOV, projectile->GetPosition(), 0);
			break;
		case WEAPONTYPE_ROCKET:
			CExplosion::AddExplosion(nil, info->m_pSource->IsVehicle() ? ((CVehicle*)info->m_pSource)->pDriver : info->m_pSource, EXPLOSION_ROCKET, projectile->GetPosition(), 0);
			break;
	}
#ifdef SQUEEZE_PERFORMANCE
	projectileInUse--;
#endif

	info->m_bInUse = false;
	CWorld::Remove(projectile);
	delete projectile;
}

void
CProjectileInfo::RemoveNotAdd(CEntity *entity, eWeaponType weaponType, CVector pos)
{
	// TODO(Miami): New parameter: 1
	switch (weaponType) {
		case WEAPONTYPE_GRENADE:
			CExplosion::AddExplosion(nil, entity, EXPLOSION_GRENADE, pos, 0);
			break;
		case WEAPONTYPE_MOLOTOV:
			CExplosion::AddExplosion(nil, entity, EXPLOSION_MOLOTOV, pos, 0);
			break;
		case WEAPONTYPE_ROCKET:
			CExplosion::AddExplosion(nil, entity, EXPLOSION_ROCKET, pos, 0);
			break;
	}
}

void
CProjectileInfo::Update()
{
#ifdef SQUEEZE_PERFORMANCE
	if (projectileInUse == 0)
		return;
#endif

	int tearGasOffset = -0.0f; // unused
	
	for (int i = 0; i < ARRAY_SIZE(gaProjectileInfo); i++) {
		if (!gaProjectileInfo[i].m_bInUse) continue;

		CPed *ped = (CPed*)gaProjectileInfo[i].m_pSource;
		if (ped != nil && ped->IsPed() && !ped->IsPointerValid())
			gaProjectileInfo[i].m_pSource = nil;

		if (ms_apProjectile[i] == nil) {
#ifdef SQUEEZE_PERFORMANCE
			projectileInUse--;
#endif

			gaProjectileInfo[i].m_bInUse = false;
			continue;
		}
		if ( (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_DETONATOR_GRENADE || gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_TEARGAS) && ms_apProjectile[i]->m_fElasticity > 0.1f ) {
			if ( Abs(ms_apProjectile[i]->m_vecMoveSpeed.x) < 0.05f && Abs(ms_apProjectile[i]->m_vecMoveSpeed.y) < 0.05f && Abs(ms_apProjectile[i]->m_vecMoveSpeed.z) < 0.05f ) {
				ms_apProjectile[i]->m_fElasticity = 0.03f;
			}
		}
		const CVector &projectilePos = ms_apProjectile[i]->GetPosition();
		CVector nextPos = CTimer::GetTimeStep() * ms_apProjectile[i]->m_vecMoveSpeed + projectilePos;

		if ( nextPos.x <= PROJECTILE_BOUNDARY_MIN_X || nextPos.x >= PROJECTILE_BOUNDARY_MAX_X || nextPos.y <= PROJECTILE_BOUNDARY_MIN_Y || nextPos.y >= PROJECTILE_BOUNDARY_MAX_Y ) {
			// Not RemoveProjectile, because we don't want no explosion
			gaProjectileInfo[i].m_bInUse = false;
			CWorld::Remove(ms_apProjectile[i]);
			delete ms_apProjectile[i];
        	continue;
		}
		if ( gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_TEARGAS && CTimer::GetTimeInMilliseconds() > gaProjectileInfo[i].m_nExplosionTime - 19500 ) {
			CParticle::AddParticle(PARTICLE_TEARGAS, projectilePos, CVector(0.2f, tearGasOffset, 0.0f), 0, 0.0f, 0, 0, 0, 0);
			CParticle::AddParticle(PARTICLE_TEARGAS, projectilePos, CVector(-0.2f, tearGasOffset, 0.0f), 0, 0.0f, 0, 0, 0, 0);
			CParticle::AddParticle(PARTICLE_TEARGAS, projectilePos, CVector(tearGasOffset, tearGasOffset, 0.0f), 0, 0.0f, 0, 0, 0, 0);

			if ( CTimer::GetTimeInMilliseconds() & 0x200 )
				CWorld::SetPedsChoking(projectilePos.x, projectilePos.y, projectilePos.z, 6.0f, gaProjectileInfo[i].m_pSource);
		}

		if (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_ROCKET) {
			CParticle::AddParticlesAlongLine(PARTICLE_ROCKET_SMOKE, gaProjectileInfo[i].m_vecPos, projectilePos, CVector(0.0f, 0.0f, 0.0f), 0.7f, 0, 0, 0, 3000);
		}

		if (CTimer::GetTimeInMilliseconds() <= gaProjectileInfo[i].m_nExplosionTime || gaProjectileInfo[i].m_nExplosionTime == 0) {
			if (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_ROCKET) {
				CVector pos = ms_apProjectile[i]->GetPosition();
				CWorld::pIgnoreEntity = ms_apProjectile[i];
				if (ms_apProjectile[i]->bHasCollided
					|| !CWorld::GetIsLineOfSightClear(gaProjectileInfo[i].m_vecPos, pos, true, true, true, true, false, false)
					|| CHeli::TestRocketCollision(&pos) || CPlane::TestRocketCollision(&pos)) {
					RemoveProjectile(&gaProjectileInfo[i], ms_apProjectile[i]);
				}
				CWorld::pIgnoreEntity = nil;
				ms_apProjectile[i]->m_vecMoveSpeed *= 1.07f;

			} else if (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_MOLOTOV) {
				CVector pos = ms_apProjectile[i]->GetPosition();
				CWorld::pIgnoreEntity = ms_apProjectile[i];

				if (gaProjectileInfo[i].m_pSource == nil 
					|| ((gaProjectileInfo[i].m_vecPos - gaProjectileInfo[i].m_pSource->GetPosition()).MagnitudeSqr() >= 2.0f))
				{
					if (ms_apProjectile[i]->bHasCollided
						|| !CWorld::GetIsLineOfSightClear(gaProjectileInfo[i].m_vecPos, pos, true, true, true, true, false, false)) {
						RemoveProjectile(&gaProjectileInfo[i], ms_apProjectile[i]);
					}
				}
				CWorld::pIgnoreEntity = nil;
			}
		} else {
			if (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_DETONATOR_GRENADE) {
				CEntity *ent = gaProjectileInfo[i].m_pSource;
				if (ent->IsPed() && ((CPed*)ped)->IsPlayer()) {
					CPed *ped = (CPed*)ent;
					if (ped->GetWeapon(ped->GetWeaponSlot(WEAPONTYPE_DETONATOR)).m_eWeaponType != WEAPONTYPE_DETONATOR
						|| ped->GetWeapon(ped->GetWeaponSlot(WEAPONTYPE_DETONATOR)).m_nAmmoTotal == 0) {
						gaProjectileInfo[i].m_nExplosionTime = 0;
					}
				}
			} else {
				RemoveProjectile(&gaProjectileInfo[i], ms_apProjectile[i]);
			}
		}

		gaProjectileInfo[i].m_vecPos = ms_apProjectile[i]->GetPosition();
	}
}

bool
CProjectileInfo::IsProjectileInRange(float x1, float x2, float y1, float y2, float z1, float z2, bool remove)
{
	bool result = false;
	for (int i = 0; i < ARRAY_SIZE(ms_apProjectile); i++) {
		if (gaProjectileInfo[i].m_bInUse) {
			if (gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_ROCKET || gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_MOLOTOV || gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_GRENADE) {
				const CVector &pos = ms_apProjectile[i]->GetPosition();
				if (pos.x >= x1 && pos.x <= x2 && pos.y >= y1 && pos.y <= y2 && pos.z >= z1 && pos.z <= z2) {
					result = true;
					if (remove) {
#ifdef SQUEEZE_PERFORMANCE
						projectileInUse--;
#endif

						gaProjectileInfo[i].m_bInUse = false;
						CWorld::Remove(ms_apProjectile[i]);
						delete ms_apProjectile[i];
					}
				}
			}
		}
	}
	return result;
}

void
CProjectileInfo::RemoveDetonatorProjectiles()
{
	for (int i = 0; i < ARRAY_SIZE(ms_apProjectile); i++) {
		if (gaProjectileInfo[i].m_bInUse && gaProjectileInfo[i].m_eWeaponType == WEAPONTYPE_DETONATOR_GRENADE) {
			CExplosion::AddExplosion(nil, gaProjectileInfo[i].m_pSource, EXPLOSION_GRENADE, gaProjectileInfo[i].m_vecPos, 0); // TODO(Miami): New parameter: 1
			gaProjectileInfo[i].m_bInUse = false;
			CWorld::Remove(ms_apProjectile[i]);
			delete ms_apProjectile[i];
		}
	}
}

void
CProjectileInfo::RemoveAllProjectiles()
{
#ifdef SQUEEZE_PERFORMANCE
	if (projectileInUse == 0)
		return;
#endif

	for (int i = 0; i < ARRAY_SIZE(ms_apProjectile); i++) {
		if (gaProjectileInfo[i].m_bInUse) {
#ifdef SQUEEZE_PERFORMANCE
			projectileInUse--;
#endif

			gaProjectileInfo[i].m_bInUse = false;
			CWorld::Remove(ms_apProjectile[i]);
			delete ms_apProjectile[i];
		}
	}
}

bool
CProjectileInfo::RemoveIfThisIsAProjectile(CObject *object)
{
#ifdef SQUEEZE_PERFORMANCE
	if (projectileInUse == 0)
		return false;
#endif

	int i = 0;
	while (ms_apProjectile[i++] != object) {
		if (i >= ARRAY_SIZE(ms_apProjectile))
			return false;
	}

#ifdef SQUEEZE_PERFORMANCE
	projectileInUse--;
#endif

	gaProjectileInfo[i].m_bInUse = false;
	CWorld::Remove(ms_apProjectile[i]);
	delete ms_apProjectile[i];
	ms_apProjectile[i] = nil;
	return true;
}