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cuberite-2a/src/Entities/ProjectileEntity.cpp

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// ProjectileEntity.cpp
// Implements the cProjectileEntity class representing the common base class for projectiles, as well as individual projectile types
#include "Globals.h"
#include "../Bindings/PluginManager.h"
#include "ProjectileEntity.h"
#include "../ClientHandle.h"
#include "Player.h"
#include "../LineBlockTracer.h"
#include "../BoundingBox.h"
#include "../ChunkMap.h"
#include "../Chunk.h"
/// Converts an angle in radians into a byte representation used by the network protocol
#define ANGLE_TO_PROTO(X) (Byte)(X * 255 / 360)
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cProjectileTracerCallback:
class cProjectileTracerCallback :
public cBlockTracer::cCallbacks
{
public:
cProjectileTracerCallback(cProjectileEntity * a_Projectile) :
m_Projectile(a_Projectile),
m_SlowdownCoeff(0.99) // Default slowdown when not in water
{
}
double GetSlowdownCoeff(void) const { return m_SlowdownCoeff; }
protected:
cProjectileEntity * m_Projectile;
double m_SlowdownCoeff;
// cCallbacks overrides:
virtual bool OnNextBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, char a_EntryFace) override
{
/*
// DEBUG:
LOGD("Hit block %d:%d at {%d, %d, %d} face %d, %s (%s)",
a_BlockType, a_BlockMeta,
a_BlockX, a_BlockY, a_BlockZ, a_EntryFace,
cBlockInfo::IsSolid(a_BlockType) ? "solid" : "non-solid",
ItemToString(cItem(a_BlockType, 1, a_BlockMeta)).c_str()
);
*/
if (cBlockInfo::IsSolid(a_BlockType))
{
// The projectile hit a solid block
// Calculate the exact hit coords:
cBoundingBox bb(a_BlockX, a_BlockX + 1, a_BlockY, a_BlockY + 1, a_BlockZ, a_BlockZ + 1);
Vector3d Line1 = m_Projectile->GetPosition();
Vector3d Line2 = Line1 + m_Projectile->GetSpeed();
double LineCoeff = 0;
eBlockFace Face;
if (bb.CalcLineIntersection(Line1, Line2, LineCoeff, Face))
{
if (cPluginManager::Get()->CallHookProjectileHitBlock(*m_Projectile))
{
return false;
}
Vector3d Intersection = Line1 + m_Projectile->GetSpeed() * LineCoeff;
m_Projectile->OnHitSolidBlock(Intersection, Face);
return true;
}
else
{
LOGD("WEIRD! block tracer reports a hit, but BBox tracer doesn't. Ignoring the hit.");
}
}
// Convey some special effects from special blocks:
switch (a_BlockType)
{
case E_BLOCK_LAVA:
case E_BLOCK_STATIONARY_LAVA:
{
m_Projectile->StartBurning(30);
m_SlowdownCoeff = std::min(m_SlowdownCoeff, 0.9); // Slow down to 0.9* the speed each tick when moving through lava
break;
}
case E_BLOCK_WATER:
case E_BLOCK_STATIONARY_WATER:
{
m_Projectile->StopBurning();
m_SlowdownCoeff = std::min(m_SlowdownCoeff, 0.8); // Slow down to 0.8* the speed each tick when moving through water
break;
}
} // switch (a_BlockType)
// Continue tracing
return false;
}
} ;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cProjectileEntityCollisionCallback:
class cProjectileEntityCollisionCallback :
public cEntityCallback
{
public:
cProjectileEntityCollisionCallback(cProjectileEntity * a_Projectile, const Vector3d & a_Pos, const Vector3d & a_NextPos) :
m_Projectile(a_Projectile),
m_Pos(a_Pos),
m_NextPos(a_NextPos),
m_MinCoeff(1),
m_HitEntity(NULL)
{
}
virtual bool Item(cEntity * a_Entity) override
{
if (
(a_Entity == m_Projectile) || // Do not check collisions with self
(a_Entity == m_Projectile->GetCreator()) // Do not check whoever shot the projectile
)
{
// TODO: Don't check creator only for the first 5 ticks
// so that arrows stuck in ground and dug up can hurt the player
return false;
}
cBoundingBox EntBox(a_Entity->GetPosition(), a_Entity->GetWidth() / 2, a_Entity->GetHeight());
// Instead of colliding the bounding box with another bounding box in motion, we collide an enlarged bounding box with a hairline.
// The results should be good enough for our purposes
double LineCoeff;
eBlockFace Face;
EntBox.Expand(m_Projectile->GetWidth() / 2, m_Projectile->GetHeight() / 2, m_Projectile->GetWidth() / 2);
if (!EntBox.CalcLineIntersection(m_Pos, m_NextPos, LineCoeff, Face))
{
// No intersection whatsoever
return false;
}
// TODO: Some entities don't interact with the projectiles (pickups, falling blocks)
if (cPluginManager::Get()->CallHookProjectileHitEntity(*m_Projectile, *a_Entity))
{
// A plugin disagreed.
return false;
}
if (LineCoeff < m_MinCoeff)
{
// The entity is closer than anything we've stored so far, replace it as the potential victim
m_MinCoeff = LineCoeff;
m_HitEntity = a_Entity;
}
// Don't break the enumeration, we want all the entities
return false;
}
/// Returns the nearest entity that was hit, after the enumeration has been completed
cEntity * GetHitEntity(void) const { return m_HitEntity; }
/// Returns the line coeff where the hit was encountered, after the enumeration has been completed
double GetMinCoeff(void) const { return m_MinCoeff; }
/// Returns true if the callback has encountered a true hit
bool HasHit(void) const { return (m_MinCoeff < 1); }
protected:
cProjectileEntity * m_Projectile;
const Vector3d & m_Pos;
const Vector3d & m_NextPos;
double m_MinCoeff; // The coefficient of the nearest hit on the Pos line
// Although it's bad(tm) to store entity ptrs from a callback, we can afford it here, because the entire callback
// is processed inside the tick thread, so the entities won't be removed in between the calls and the final processing
cEntity * m_HitEntity; // The nearest hit entity
} ;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cProjectileEntity:
cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, double a_Width, double a_Height) :
super(etProjectile, a_X, a_Y, a_Z, a_Width, a_Height),
m_ProjectileKind(a_Kind),
m_Creator(a_Creator),
m_IsInGround(false)
{
}
cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Vector3d & a_Pos, const Vector3d & a_Speed, double a_Width, double a_Height) :
super(etProjectile, a_Pos.x, a_Pos.y, a_Pos.z, a_Width, a_Height),
m_ProjectileKind(a_Kind),
m_Creator(a_Creator),
m_IsInGround(false)
{
SetSpeed(a_Speed);
SetYawFromSpeed();
SetPitchFromSpeed();
}
cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem & a_Item, const Vector3d * a_Speed)
{
Vector3d Speed;
if (a_Speed != NULL)
{
Speed = *a_Speed;
}
switch (a_Kind)
{
case pkArrow: return new cArrowEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkEgg: return new cThrownEggEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkEnderPearl: return new cThrownEnderPearlEntity(a_Creator, a_X, a_Y, a_Z, Speed);
case pkSnowball: return new cThrownSnowballEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkGhastFireball: return new cGhastFireballEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkFireCharge: return new cFireChargeEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkExpBottle: return new cExpBottleEntity (a_Creator, a_X, a_Y, a_Z, Speed);
case pkFirework:
{
if (a_Item.m_FireworkItem.m_Colours.empty())
{
return NULL;
}
return new cFireworkEntity(a_Creator, a_X, a_Y, a_Z, a_Item);
}
}
LOGWARNING("%s: Unknown projectile kind: %d", __FUNCTION__, a_Kind);
return NULL;
}
void cProjectileEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
// Set the position based on what face was hit:
SetPosition(a_HitPos);
SetSpeed(0, 0, 0);
// DEBUG:
LOGD("Projectile %d: pos {%.02f, %.02f, %.02f}, hit solid block at face %d",
m_UniqueID,
a_HitPos.x, a_HitPos.y, a_HitPos.z,
a_HitFace
);
m_IsInGround = true;
}
AString cProjectileEntity::GetMCAClassName(void) const
{
switch (m_ProjectileKind)
{
case pkArrow: return "Arrow";
case pkSnowball: return "Snowball";
case pkEgg: return "Egg";
case pkGhastFireball: return "Fireball";
case pkFireCharge: return "SmallFireball";
case pkEnderPearl: return "ThrownEnderPearl";
case pkExpBottle: return "ThrownExpBottle";
case pkSplashPotion: return "ThrownPotion";
case pkWitherSkull: return "WitherSkull";
case pkFirework: return "Firework";
case pkFishingFloat: return ""; // Unknown, perhaps MC doesn't save this?
}
ASSERT(!"Unhandled projectile entity kind!");
return "";
}
void cProjectileEntity::Tick(float a_Dt, cChunk & a_Chunk)
{
super::Tick(a_Dt, a_Chunk);
if (GetProjectileKind() != pkArrow) // See cArrow::Tick
{
BroadcastMovementUpdate();
}
}
void cProjectileEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
{
if (m_IsInGround)
{
// Already-grounded projectiles don't move at all
return;
}
Vector3d PerTickSpeed = GetSpeed() / 20;
Vector3d Pos = GetPosition();
// Trace the tick's worth of movement as a line:
Vector3d NextPos = Pos + PerTickSpeed;
cProjectileTracerCallback TracerCallback(this);
if (!cLineBlockTracer::Trace(*m_World, TracerCallback, Pos, NextPos))
{
// Something has been hit, abort all other processing
return;
}
// The tracer also checks the blocks for slowdown blocks - water and lava - and stores it for later in its SlowdownCoeff
// Test for entity collisions:
cProjectileEntityCollisionCallback EntityCollisionCallback(this, Pos, NextPos);
a_Chunk.ForEachEntity(EntityCollisionCallback);
if (EntityCollisionCallback.HasHit())
{
// An entity was hit:
Vector3d HitPos = Pos + (NextPos - Pos) * EntityCollisionCallback.GetMinCoeff();
// DEBUG:
LOGD("Projectile %d has hit an entity %d (%s) at {%.02f, %.02f, %.02f} (coeff %.03f)",
m_UniqueID,
EntityCollisionCallback.GetHitEntity()->GetUniqueID(),
EntityCollisionCallback.GetHitEntity()->GetClass(),
HitPos.x, HitPos.y, HitPos.z,
EntityCollisionCallback.GetMinCoeff()
);
OnHitEntity(*(EntityCollisionCallback.GetHitEntity()), HitPos);
}
// TODO: Test the entities in the neighboring chunks, too
// Update the position:
SetPosition(NextPos);
// Add slowdown and gravity effect to the speed:
Vector3d NewSpeed(GetSpeed());
NewSpeed.y += m_Gravity / 20;
NewSpeed *= TracerCallback.GetSlowdownCoeff();
SetSpeed(NewSpeed);
SetYawFromSpeed();
SetPitchFromSpeed();
/*
LOGD("Projectile %d: pos {%.02f, %.02f, %.02f}, speed {%.02f, %.02f, %.02f}, rot {%.02f, %.02f}",
m_UniqueID,
GetPosX(), GetPosY(), GetPosZ(),
GetSpeedX(), GetSpeedY(), GetSpeedZ(),
GetYaw(), GetPitch()
);
*/
}
void cProjectileEntity::SpawnOn(cClientHandle & a_Client)
{
// Default spawning - use the projectile kind to spawn an object:
a_Client.SendSpawnObject(*this, m_ProjectileKind, 12, ANGLE_TO_PROTO(GetYaw()), ANGLE_TO_PROTO(GetPitch()));
a_Client.SendEntityMetadata(*this);
}
void cProjectileEntity::CollectedBy(cPlayer * a_Dest)
{
// Overriden in arrow
UNUSED(a_Dest);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cArrowEntity:
cArrowEntity::cArrowEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkArrow, a_Creator, a_X, a_Y, a_Z, 0.5, 0.5),
m_PickupState(psNoPickup),
m_DamageCoeff(2),
m_IsCritical(false),
m_Timer(0),
m_HitGroundTimer(0),
m_bIsCollected(false),
m_HitBlockPos(Vector3i(0, 0, 0))
{
SetSpeed(a_Speed);
SetMass(0.1);
SetYawFromSpeed();
SetPitchFromSpeed();
LOGD("Created arrow %d with speed {%.02f, %.02f, %.02f} and rot {%.02f, %.02f}",
m_UniqueID, GetSpeedX(), GetSpeedY(), GetSpeedZ(),
GetYaw(), GetPitch()
);
}
cArrowEntity::cArrowEntity(cPlayer & a_Player, double a_Force) :
super(pkArrow, &a_Player, a_Player.GetThrowStartPos(), a_Player.GetThrowSpeed(a_Force * 1.5 * 20), 0.5, 0.5),
m_PickupState(psInSurvivalOrCreative),
m_DamageCoeff(2),
m_IsCritical((a_Force >= 1)),
m_Timer(0),
m_HitGroundTimer(0),
m_bIsCollected(false),
m_HitBlockPos(0, 0, 0)
{
}
bool cArrowEntity::CanPickup(const cPlayer & a_Player) const
{
switch (m_PickupState)
{
case psNoPickup: return false;
case psInSurvivalOrCreative: return (a_Player.IsGameModeSurvival() || a_Player.IsGameModeCreative());
case psInCreative: return a_Player.IsGameModeCreative();
}
ASSERT(!"Unhandled pickup state");
return false;
}
void cArrowEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
if (a_HitFace == BLOCK_FACE_NONE) { return; }
super::OnHitSolidBlock(a_HitPos, a_HitFace);
int a_X = (int)a_HitPos.x, a_Y = (int)a_HitPos.y, a_Z = (int)a_HitPos.z;
switch (a_HitFace)
{
case BLOCK_FACE_XM: // Strangely, bounding boxes / block tracers return the actual block for these two directions, so AddFace not needed
case BLOCK_FACE_YM:
{
break;
}
default: AddFaceDirection(a_X, a_Y, a_Z, a_HitFace, true);
}
m_HitBlockPos = Vector3i(a_X, a_Y, a_Z);
// Broadcast arrow hit sound
m_World->BroadcastSoundEffect("random.bowhit", (int)GetPosX() * 8, (int)GetPosY() * 8, (int)GetPosZ() * 8, 0.5f, (float)(0.75 + ((float)((GetUniqueID() * 23) % 32)) / 64));
}
void cArrowEntity::OnHitEntity(cEntity & a_EntityHit, const Vector3d & a_HitPos)
{
if (!a_EntityHit.IsMob() && !a_EntityHit.IsMinecart() && !a_EntityHit.IsPlayer() && !a_EntityHit.IsBoat())
{
// Not an entity that interacts with an arrow
return;
}
int Damage = (int)(GetSpeed().Length() / 20 * m_DamageCoeff + 0.5);
if (m_IsCritical)
{
Damage += m_World->GetTickRandomNumber(Damage / 2 + 2);
}
a_EntityHit.TakeDamage(dtRangedAttack, this, Damage, 1);
// Broadcast successful hit sound
m_World->BroadcastSoundEffect("random.successful_hit", (int)GetPosX() * 8, (int)GetPosY() * 8, (int)GetPosZ() * 8, 0.5, (float)(0.75 + ((float)((GetUniqueID() * 23) % 32)) / 64));
Destroy();
}
void cArrowEntity::CollectedBy(cPlayer * a_Dest)
{
if ((m_IsInGround) && (!m_bIsCollected) && (CanPickup(*a_Dest)))
{
int NumAdded = a_Dest->GetInventory().AddItem(E_ITEM_ARROW);
if (NumAdded > 0) // Only play effects if there was space in inventory
{
m_World->BroadcastCollectPickup((const cPickup &)*this, *a_Dest);
// Also send the "pop" sound effect with a somewhat random pitch (fast-random using EntityID ;)
m_World->BroadcastSoundEffect("random.pop", (int)GetPosX() * 8, (int)GetPosY() * 8, (int)GetPosZ() * 8, 0.5, (float)(0.75 + ((float)((GetUniqueID() * 23) % 32)) / 64));
m_bIsCollected = true;
}
}
}
void cArrowEntity::Tick(float a_Dt, cChunk & a_Chunk)
{
super::Tick(a_Dt, a_Chunk);
m_Timer += a_Dt;
if (m_bIsCollected)
{
if (m_Timer > 500.f) // 0.5 seconds
{
Destroy();
return;
}
}
else if (m_Timer > 1000 * 60 * 5) // 5 minutes
{
Destroy();
return;
}
if (m_IsInGround)
{
// When an arrow hits, the client doesn't think its in the ground and keeps on moving, IF BroadcastMovementUpdate() and TeleportEntity was called during flight, AT ALL
// Fix is to simply not sync with the client and send a teleport to confirm pos after arrow has stabilised (around 1 sec after landing)
// We can afford to do this because xoft's algorithm for trajectory is near perfect, so things are pretty close anyway without sync
// Besides, this seems to be what the vanilla server does, note how arrows teleport half a second after they hit to the server position
if (m_HitGroundTimer != -1) // Sent a teleport already, don't do again
{
if (m_HitGroundTimer > 1000.f) // Send after a second, could be less, but just in case
{
m_World->BroadcastTeleportEntity(*this);
m_HitGroundTimer = -1;
}
else
{
m_HitGroundTimer += a_Dt;
}
}
int RelPosX = m_HitBlockPos.x - a_Chunk.GetPosX() * cChunkDef::Width;
int RelPosZ = m_HitBlockPos.z - a_Chunk.GetPosZ() * cChunkDef::Width;
cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
if (Chunk == NULL)
{
// Inside an unloaded chunk, abort
return;
}
if (Chunk->GetBlock(RelPosX, m_HitBlockPos.y, RelPosZ) == E_BLOCK_AIR) // Block attached to was destroyed?
{
m_IsInGround = false; // Yes, begin simulating physics again
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cThrownEggEntity:
cThrownEggEntity::cThrownEggEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkEgg, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
{
SetSpeed(a_Speed);
}
void cThrownEggEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
if (m_World->GetTickRandomNumber(7) == 1)
{
m_World->SpawnMob(a_HitPos.x, a_HitPos.y, a_HitPos.z, cMonster::mtChicken);
}
else if (m_World->GetTickRandomNumber(32) == 1)
{
m_World->SpawnMob(a_HitPos.x, a_HitPos.y, a_HitPos.z, cMonster::mtChicken);
m_World->SpawnMob(a_HitPos.x, a_HitPos.y, a_HitPos.z, cMonster::mtChicken);
m_World->SpawnMob(a_HitPos.x, a_HitPos.y, a_HitPos.z, cMonster::mtChicken);
m_World->SpawnMob(a_HitPos.x, a_HitPos.y, a_HitPos.z, cMonster::mtChicken);
}
Destroy();
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cThrownEnderPearlEntity :
cThrownEnderPearlEntity::cThrownEnderPearlEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkEnderPearl, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
{
SetSpeed(a_Speed);
}
void cThrownEnderPearlEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
// Teleport the creator here, make them take 5 damage:
if (m_Creator != NULL)
{
// TODO: The coords might need some tweaking based on the block face
m_Creator->TeleportToCoords(a_HitPos.x + 0.5, a_HitPos.y + 1.7, a_HitPos.z + 0.5);
m_Creator->TakeDamage(dtEnderPearl, this, 5, 0);
}
Destroy();
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cThrownSnowballEntity :
cThrownSnowballEntity::cThrownSnowballEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkSnowball, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
{
SetSpeed(a_Speed);
}
void cThrownSnowballEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
Destroy();
}
void cThrownSnowballEntity::OnHitEntity(cEntity & a_EntityHit, const Vector3d & a_HitPos)
{
int TotalDamage = 0;
if (a_EntityHit.IsMob())
{
cMonster::eType MobType = ((cMonster &) a_EntityHit).GetMobType();
if (MobType == cMonster::mtBlaze)
{
TotalDamage = 3;
}
else if (MobType == cMonster::mtEnderDragon)
{
TotalDamage = 1;
}
}
a_EntityHit.TakeDamage(dtRangedAttack, this, TotalDamage, 1);
Destroy(true);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cBottleOEnchantingEntity :
cExpBottleEntity::cExpBottleEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkExpBottle, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
{
SetSpeed(a_Speed);
}
void cExpBottleEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
// Spawn an experience orb with a reward between 3 and 11.
m_World->BroadcastSoundParticleEffect(2002, POSX_TOINT, POSY_TOINT, POSZ_TOINT, 0);
m_World->SpawnExperienceOrb(GetPosX(), GetPosY(), GetPosZ(), 3 + m_World->GetTickRandomNumber(8));
Destroy();
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cFireworkEntity :
cFireworkEntity::cFireworkEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem & a_Item) :
super(pkFirework, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25),
m_ExplodeTimer(0),
m_FireworkItem(a_Item)
{
}
void cFireworkEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
{
int RelX = POSX_TOINT - a_Chunk.GetPosX() * cChunkDef::Width;
int RelZ = POSZ_TOINT - a_Chunk.GetPosZ() * cChunkDef::Width;
int PosY = POSY_TOINT;
if ((PosY < 0) || (PosY >= cChunkDef::Height))
{
goto setspeed;
}
if (m_IsInGround)
{
if (a_Chunk.GetBlock(RelX, POSY_TOINT + 1, RelZ) == E_BLOCK_AIR)
{
m_IsInGround = false;
}
else
{
return;
}
}
else
{
if (a_Chunk.GetBlock(RelX, POSY_TOINT + 1, RelZ) != E_BLOCK_AIR)
{
OnHitSolidBlock(GetPosition(), BLOCK_FACE_YM);
return;
}
}
setspeed:
AddSpeedY(1);
AddPosition(GetSpeed() * (a_Dt / 1000));
}
void cFireworkEntity::Tick(float a_Dt, cChunk & a_Chunk)
{
super::Tick(a_Dt, a_Chunk);
if (m_ExplodeTimer == m_FireworkItem.m_FireworkItem.m_FlightTimeInTicks)
{
m_World->BroadcastEntityStatus(*this, esFireworkExploding);
Destroy();
}
m_ExplodeTimer++;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cGhastFireballEntity :
cGhastFireballEntity::cGhastFireballEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkGhastFireball, a_Creator, a_X, a_Y, a_Z, 1, 1)
{
SetSpeed(a_Speed);
SetGravity(0);
}
void cGhastFireballEntity::Explode(int a_BlockX, int a_BlockY, int a_BlockZ)
{
m_World->DoExplosionAt(1, a_BlockX, a_BlockY, a_BlockZ, true, esGhastFireball, this);
}
void cGhastFireballEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
Destroy();
Explode((int)floor(a_HitPos.x), (int)floor(a_HitPos.y), (int)floor(a_HitPos.z));
}
void cGhastFireballEntity::OnHitEntity(cEntity & a_EntityHit, const Vector3d & a_HitPos)
{
Destroy();
Explode((int)floor(a_HitPos.x), (int)floor(a_HitPos.y), (int)floor(a_HitPos.z));
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cFireChargeEntity :
cFireChargeEntity::cFireChargeEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
super(pkFireCharge, a_Creator, a_X, a_Y, a_Z, 0.3125, 0.3125)
{
SetSpeed(a_Speed);
SetGravity(0);
}
void cFireChargeEntity::Explode(int a_BlockX, int a_BlockY, int a_BlockZ)
{
if (m_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) == E_BLOCK_AIR)
{
m_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_FIRE, 1);
}
}
void cFireChargeEntity::OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace)
{
Destroy();
Explode((int)floor(a_HitPos.x), (int)floor(a_HitPos.y), (int)floor(a_HitPos.z));
}
void cFireChargeEntity::OnHitEntity(cEntity & a_EntityHit, const Vector3d & a_HitPos)
{
Destroy();
Explode((int)floor(a_HitPos.x), (int)floor(a_HitPos.y), (int)floor(a_HitPos.z));
// TODO: Some entities are immune to hits
a_EntityHit.StartBurning(5 * 20); // 5 seconds of burning
}
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