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(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_CreatorData(a_Creator->GetUniqueID(), a_Creator->IsPlayer() ? ((cPlayer *)a_Creator)->GetName() : "", a_Creator->GetEquippedWeapon().m_Enchantments),
m_IsInGround(false)
{
SetSpeed(a_Speed);
SetYawFromSpeed();
SetPitchFromSpeed();
}
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()
);
}
void cProjectileEntity::HandlePhysics(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
{
if (m_IsInGround)
{
// Already-grounded projectiles don't move at all
return;
}
auto DtSec = std::chrono::duration_cast<std::chrono::duration<double>>(a_Dt);
const Vector3d DeltaSpeed = GetSpeed() * DtSec.count();
const Vector3d Pos = GetPosition();
const Vector3d NextPos = Pos + DeltaSpeed;
// 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);
if (!IsTicking())
{
return; // We were destroyed by an override of OnHitEntity
}
}
// TODO: Test the entities in the neighboring chunks, too
// Trace the tick's worth of movement as a line:
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
// Update the position:
SetPosition(NextPos);
// Add slowdown and gravity effect to the speed:
Vector3d NewSpeed(GetSpeed());
NewSpeed.y += m_Gravity * DtSec.count();
NewSpeed -= NewSpeed * (m_AirDrag * 20.0f) * DtSec.count();
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::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()
);
*/
}