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cuberite-2a/src/Entities/Minecart.cpp
Mattes D 79c1f6f438 Merge pull request #534 from mc-server/SpawnMinecart 
Added cWorld::SpawnMinecart.
2014-01-17 02:27:56 -08:00

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// Minecart.cpp
// Implements the cMinecart class representing a minecart in the world
// Handles physics when a minecart is on any type of rail (overrides simulator in Entity.cpp)
// Indiana Jones!
#include "Globals.h"
#include "Minecart.h"
#include "../World.h"
#include "../ClientHandle.h"
#include "../Chunk.h"
#include "Player.h"
#include "../BoundingBox.h"
#define MAX_SPEED 8
#define MAX_SPEED_NEGATIVE -MAX_SPEED
cMinecart::cMinecart(ePayload a_Payload, double a_X, double a_Y, double a_Z) :
super(etMinecart, a_X, a_Y, a_Z, 0.98, 0.7),
m_Payload(a_Payload),
m_LastDamage(0),
m_DetectorRailPosition(0, 0, 0),
m_bIsOnDetectorRail(false)
{
SetMass(20.f);
SetMaxHealth(6);
SetHealth(6);
SetWidth(1.2);
SetHeight(0.9);
}
void cMinecart::SpawnOn(cClientHandle & a_ClientHandle)
{
char SubType = 0;
switch (m_Payload)
{
case mpNone: SubType = 0; break;
case mpChest: SubType = 1; break;
case mpFurnace: SubType = 2; break;
case mpTNT: SubType = 3; break;
case mpHopper: SubType = 5; break;
default:
{
ASSERT(!"Unknown payload, cannot spawn on client");
return;
}
}
a_ClientHandle.SendSpawnVehicle(*this, 10, SubType); // 10 = Minecarts, SubType = What type of Minecart
a_ClientHandle.SendEntityMetadata(*this);
}
void cMinecart::HandlePhysics(float a_Dt, cChunk & a_Chunk)
{
if (IsDestroyed()) // Mainly to stop detector rails triggering again after minecart is dead
{
return;
}
int PosY = (int)floor(GetPosY());
if ((PosY <= 0) || (PosY >= cChunkDef::Height))
{
// Outside the world, just process normal falling physics
super::HandlePhysics(a_Dt, a_Chunk);
BroadcastMovementUpdate();
return;
}
int RelPosX = (int)floor(GetPosX()) - a_Chunk.GetPosX() * cChunkDef::Width;
int RelPosZ = (int)floor(GetPosZ()) - a_Chunk.GetPosZ() * cChunkDef::Width;
cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
if (Chunk == NULL)
{
// Inside an unloaded chunk, bail out all processing
return;
}
BLOCKTYPE InsideType;
NIBBLETYPE InsideMeta;
Chunk->GetBlockTypeMeta(RelPosX, PosY, RelPosZ, InsideType, InsideMeta);
if (!IsBlockRail(InsideType))
{
Chunk->GetBlockTypeMeta(RelPosX, PosY + 1, RelPosZ, InsideType, InsideMeta); // When an descending minecart hits a flat rail, it goes through the ground; check for this
if (IsBlockRail(InsideType)) AddPosY(1); // Push cart upwards
}
if (IsBlockRail(InsideType))
{
bool WasDetectorRail = false;
SnapToRail(InsideMeta);
switch (InsideType)
{
case E_BLOCK_RAIL: HandleRailPhysics(InsideMeta, a_Dt); break;
case E_BLOCK_ACTIVATOR_RAIL: break;
case E_BLOCK_POWERED_RAIL: HandlePoweredRailPhysics(InsideMeta); break;
case E_BLOCK_DETECTOR_RAIL:
{
HandleDetectorRailPhysics(InsideMeta, a_Dt);
WasDetectorRail = true;
break;
}
default: VERIFY(!"Unhandled rail type despite checking if block was rail!"); break;
}
AddPosition(GetSpeed() * (a_Dt / 1000)); // Commit changes; as we use our own engine when on rails, this needs to be done, whereas it is normally in Entity.cpp
if (m_bIsOnDetectorRail && !WasDetectorRail)
{
m_World->SetBlock(m_DetectorRailPosition.x, m_DetectorRailPosition.y, m_DetectorRailPosition.z, E_BLOCK_DETECTOR_RAIL, m_World->GetBlockMeta(m_DetectorRailPosition) & 0x07);
m_bIsOnDetectorRail = false;
}
}
else
{
// Not on rail, default physics
SetPosY(floor(GetPosY()) + 0.35); // HandlePhysics overrides this if minecart can fall, else, it is to stop ground clipping minecart bottom when off-rail
super::HandlePhysics(a_Dt, *Chunk);
}
// Broadcast positioning changes to client
BroadcastMovementUpdate();
}
void cMinecart::HandleRailPhysics(NIBBLETYPE a_RailMeta, float a_Dt)
{
/*
NOTE: Please bear in mind that taking away from negatives make them even more negative,
adding to negatives make them positive, etc.
*/
switch (a_RailMeta)
{
case E_META_RAIL_ZM_ZP: // NORTHSOUTH
{
SetYaw(270);
SetPosY(floor(GetPosY()) + 0.55);
SetSpeedY(0); // Don't move vertically as on ground
SetSpeedX(0); // Correct diagonal movement from curved rails
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() != 0) // Don't do anything if cart is stationary
{
if (GetSpeedZ() > 0)
{
// Going SOUTH, slow down
AddSpeedZ(-0.1);
}
else
{
// Going NORTH, slow down
AddSpeedZ(0.1);
}
}
break;
}
case E_META_RAIL_XM_XP: // EASTWEST
{
SetYaw(180);
SetPosY(floor(GetPosY()) + 0.55);
SetSpeedY(0);
SetSpeedZ(0);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedX() != 0)
{
if (GetSpeedX() > 0)
{
AddSpeedX(-0.1);
}
else
{
AddSpeedX(0.1);
}
}
break;
}
case E_META_RAIL_ASCEND_ZM: // ASCEND NORTH
{
SetYaw(270);
SetSpeedX(0);
if (GetSpeedZ() >= 0)
{
// SpeedZ POSITIVE, going SOUTH
if (GetSpeedZ() <= MAX_SPEED) // Speed limit
{
AddSpeedZ(0.5); // Speed up
SetSpeedY(-GetSpeedZ()); // Downward movement is negative (0 minus positive numbers is negative)
}
}
else
{
// SpeedZ NEGATIVE, going NORTH
AddSpeedZ(1); // Slow down
SetSpeedY(-GetSpeedZ()); // Upward movement is positive (0 minus negative number is positive number)
}
break;
}
case E_META_RAIL_ASCEND_ZP: // ASCEND SOUTH
{
SetYaw(270);
SetSpeedX(0);
if (GetSpeedZ() > 0)
{
// SpeedZ POSITIVE, going SOUTH
AddSpeedZ(-1); // Slow down
SetSpeedY(GetSpeedZ()); // Upward movement positive
}
else
{
if (GetSpeedZ() >= MAX_SPEED_NEGATIVE) // Speed limit
{
// SpeedZ NEGATIVE, going NORTH
AddSpeedZ(-0.5); // Speed up
SetSpeedY(GetSpeedZ()); // Downward movement negative
}
}
break;
}
case E_META_RAIL_ASCEND_XM: // ASCEND EAST
{
SetYaw(180);
SetSpeedZ(0);
if (GetSpeedX() >= 0)
{
if (GetSpeedX() <= MAX_SPEED)
{
AddSpeedX(0.5);
SetSpeedY(-GetSpeedX());
}
}
else
{
AddSpeedX(1);
SetSpeedY(-GetSpeedX());
}
break;
}
case E_META_RAIL_ASCEND_XP: // ASCEND WEST
{
SetYaw(180);
SetSpeedZ(0);
if (GetSpeedX() > 0)
{
AddSpeedX(-1);
SetSpeedY(GetSpeedX());
}
else
{
if (GetSpeedX() >= MAX_SPEED_NEGATIVE)
{
AddSpeedX(-0.5);
SetSpeedY(GetSpeedX());
}
}
break;
}
case E_META_RAIL_CURVED_ZM_XM: // Ends pointing NORTH and WEST
{
SetYaw(315); // Set correct rotation server side
SetPosY(floor(GetPosY()) + 0.55); // Levitate dat cart
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() > 0) // Cart moving south
{
int OldX = (int)floor(GetPosX());
AddSpeedX(-GetSpeedZ() + 0.5); // See below
AddPosX(-GetSpeedZ() * (a_Dt / 1000)); // Diagonally move southwest (which will make cart hit a southwest rail)
// If we are already at southwest rail, set Z speed to zero as we can be moving so fast, MCS doesn't tick fast enough to active the handle for the rail...
// ...and so we derail unexpectedly.
if (GetPosX() <= OldX - 1) SetSpeedZ(0);
}
else if (GetSpeedX() > 0) // Cart moving east
{
int OldZ = (int)floor(GetPosZ());
AddSpeedZ(-GetSpeedX() + 0.5);
AddPosZ(-GetSpeedX() * (a_Dt / 1000)); // Diagonally move northeast
if (GetPosZ() <= OldZ - 1) SetSpeedX(0);
}
break;
}
case E_META_RAIL_CURVED_ZM_XP: // Curved NORTH EAST
{
SetYaw(225);
SetPosY(floor(GetPosY()) + 0.55);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() > 0)
{
int OldX = (int)floor(GetPosX());
AddSpeedX(GetSpeedZ() - 0.5);
AddPosX(GetSpeedZ() * (a_Dt / 1000));
if (GetPosX() >= OldX + 1) SetSpeedZ(0);
}
else if (GetSpeedX() < 0)
{
int OldZ = (int)floor(GetPosZ());
AddSpeedZ(GetSpeedX() + 0.5);
AddPosZ(GetSpeedX() * (a_Dt / 1000));
if (GetPosZ() <= OldZ - 1) SetSpeedX(0);
}
break;
}
case E_META_RAIL_CURVED_ZP_XM: // Curved SOUTH WEST
{
SetYaw(135);
SetPosY(floor(GetPosY()) + 0.55);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() < 0)
{
int OldX = (int)floor(GetPosX());
AddSpeedX(GetSpeedZ() + 0.5);
AddPosX(GetSpeedZ() * (a_Dt / 1000));
if (GetPosX() <= OldX - 1) SetSpeedZ(0);
}
else if (GetSpeedX() > 0)
{
int OldZ = (int)floor(GetPosZ());
AddSpeedZ(GetSpeedX() - 0.5);
AddPosZ(GetSpeedX() * (a_Dt / 1000));
if (GetPosZ() >= OldZ + 1) SetSpeedX(0);
}
break;
}
case E_META_RAIL_CURVED_ZP_XP: // Curved SOUTH EAST
{
SetYaw(45);
SetPosY(floor(GetPosY()) + 0.55);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() < 0)
{
int OldX = (int)floor(GetPosX());
AddSpeedX(-GetSpeedZ() - 0.5);
AddPosX(-GetSpeedZ() * (a_Dt / 1000));
if (GetPosX() >= OldX + 1) SetSpeedZ(0);
}
else if (GetSpeedX() < 0)
{
int OldZ = (int)floor(GetPosZ());
AddSpeedZ(-GetSpeedX() - 0.5);
AddPosZ(-GetSpeedX() * (a_Dt / 1000));
if (GetPosZ() >= OldZ + 1) SetSpeedX(0);
}
break;
}
default:
{
ASSERT(!"Unhandled rail meta!"); // Dun dun DUN!
break;
}
}
}
void cMinecart::HandlePoweredRailPhysics(NIBBLETYPE a_RailMeta)
{
// Initialise to 'slow down' values
int AccelDecelSpeed = -1;
int AccelDecelNegSpeed = 1;
if ((a_RailMeta & 0x8) == 0x8)
{
// Rail powered - set variables to 'speed up' values
AccelDecelSpeed = 1;
AccelDecelNegSpeed = -1;
}
switch (a_RailMeta & 0x07)
{
case E_META_RAIL_ZM_ZP: // NORTHSOUTH
{
SetYaw(270);
SetPosY(floor(GetPosY()) + 0.55);
SetSpeedY(0);
SetSpeedX(0);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedZ() != 0)
{
if (GetSpeedZ() > 0)
{
AddSpeedZ(AccelDecelNegSpeed);
}
else
{
AddSpeedZ(AccelDecelSpeed);
}
}
break;
}
case E_META_RAIL_XM_XP: // EASTWEST
{
SetYaw(180);
SetPosY(floor(GetPosY()) + 0.55);
SetSpeedY(0);
SetSpeedZ(0);
if (TestBlockCollision(a_RailMeta)) return;
if (GetSpeedX() != 0)
{
if (GetSpeedX() > 0)
{
AddSpeedX(AccelDecelSpeed);
}
else
{
AddSpeedX(AccelDecelNegSpeed);
}
}
break;
}
}
}
void cMinecart::HandleDetectorRailPhysics(NIBBLETYPE a_RailMeta, float a_Dt)
{
m_bIsOnDetectorRail = true;
m_DetectorRailPosition = Vector3i((int)floor(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()));
m_World->SetBlockMeta(m_DetectorRailPosition, a_RailMeta | 0x08);
HandleRailPhysics(a_RailMeta & 0x07, a_Dt);
}
void cMinecart::SnapToRail(NIBBLETYPE a_RailMeta)
{
switch (a_RailMeta)
{
case E_META_RAIL_ASCEND_XM:
case E_META_RAIL_ASCEND_XP:
case E_META_RAIL_XM_XP:
{
SetSpeedZ(0);
SetPosZ(floor(GetPosZ()) + 0.5);
break;
}
case E_META_RAIL_ASCEND_ZM:
case E_META_RAIL_ASCEND_ZP:
case E_META_RAIL_ZM_ZP:
{
SetSpeedX(0);
SetPosX(floor(GetPosX()) + 0.5);
break;
}
default: break;
}
}
bool cMinecart::TestBlockCollision(NIBBLETYPE a_RailMeta)
{
switch (a_RailMeta)
{
case E_META_RAIL_ZM_ZP:
{
if (GetSpeedZ() > 0)
{
BLOCKTYPE Block = m_World->GetBlock((int)floor(GetPosX()), (int)floor(GetPosY()), (int)ceil(GetPosZ()));
if (!IsBlockRail(Block) && g_BlockIsSolid[Block])
{
// We could try to detect a block in front based purely on coordinates, but xoft made a bounding box system - why not use? :P
cBoundingBox bbBlock(Vector3d((int)floor(GetPosX()), (int)floor(GetPosY()), (int)ceil(GetPosZ())), 0.5, 1);
cBoundingBox bbMinecart(Vector3d(GetPosX(), floor(GetPosY()), GetPosZ()), GetWidth() / 2, GetHeight());
if (bbBlock.DoesIntersect(bbMinecart))
{
SetSpeed(0, 0, 0);
SetPosZ(floor(GetPosZ()) + 0.4);
return true;
}
}
}
else
{
BLOCKTYPE Block = m_World->GetBlock((int)floor(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()) - 1);
if (!IsBlockRail(Block) && g_BlockIsSolid[Block])
{
cBoundingBox bbBlock(Vector3d((int)floor(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()) - 1), 0.5, 1);
cBoundingBox bbMinecart(Vector3d(GetPosX(), floor(GetPosY()), GetPosZ() - 1), GetWidth() / 2, GetHeight());
if (bbBlock.DoesIntersect(bbMinecart))
{
SetSpeed(0, 0, 0);
SetPosZ(floor(GetPosZ()) + 0.65);
return true;
}
}
}
break;
}
case E_META_RAIL_XM_XP:
{
if (GetSpeedX() > 0)
{
BLOCKTYPE Block = m_World->GetBlock((int)ceil(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()));
if (!IsBlockRail(Block) && g_BlockIsSolid[Block])
{
cBoundingBox bbBlock(Vector3d((int)ceil(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ())), 0.5, 1);
cBoundingBox bbMinecart(Vector3d(GetPosX(), floor(GetPosY()), GetPosZ()), GetWidth() / 2, GetHeight());
if (bbBlock.DoesIntersect(bbMinecart))
{
SetSpeed(0, 0, 0);
SetPosX(floor(GetPosX()) + 0.4);
return true;
}
}
}
else
{
BLOCKTYPE Block = m_World->GetBlock((int)floor(GetPosX()) - 1, (int)floor(GetPosY()), (int)floor(GetPosZ()));
if (!IsBlockRail(Block) && g_BlockIsSolid[Block])
{
cBoundingBox bbBlock(Vector3d((int)floor(GetPosX()) - 1, (int)floor(GetPosY()), (int)floor(GetPosZ())), 0.5, 1);
cBoundingBox bbMinecart(Vector3d(GetPosX() - 1, floor(GetPosY()), GetPosZ()), GetWidth() / 2, GetHeight());
if (bbBlock.DoesIntersect(bbMinecart))
{
SetSpeed(0, 0, 0);
SetPosX(floor(GetPosX()) + 0.65);
return true;
}
}
}
break;
}
case E_META_RAIL_CURVED_ZM_XM:
case E_META_RAIL_CURVED_ZM_XP:
case E_META_RAIL_CURVED_ZP_XM:
case E_META_RAIL_CURVED_ZP_XP:
{
BLOCKTYPE BlockXM = m_World->GetBlock((int)floor(GetPosX()) - 1, (int)floor(GetPosY()), (int)floor(GetPosZ()));
BLOCKTYPE BlockXP = m_World->GetBlock((int)floor(GetPosX()) + 1, (int)floor(GetPosY()), (int)floor(GetPosZ()));
BLOCKTYPE BlockZM = m_World->GetBlock((int)floor(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()) + 1);
BLOCKTYPE BlockZP = m_World->GetBlock((int)floor(GetPosX()), (int)floor(GetPosY()), (int)floor(GetPosZ()) + 1);
if (
(!IsBlockRail(BlockXM) && g_BlockIsSolid[BlockXM]) ||
(!IsBlockRail(BlockXP) && g_BlockIsSolid[BlockXP]) ||
(!IsBlockRail(BlockZM) && g_BlockIsSolid[BlockZM]) ||
(!IsBlockRail(BlockZP) && g_BlockIsSolid[BlockZP])
)
{
SetSpeed(0, 0, 0);
SetPosition((int)floor(GetPosX()) + 0.5, GetPosY(), (int)floor(GetPosZ()) + 0.5);
return true;
}
break;
}
default: break;
}
return false;
}
void cMinecart::DoTakeDamage(TakeDamageInfo & TDI)
{
if (TDI.Attacker->IsPlayer() && ((cPlayer *)TDI.Attacker)->IsGameModeCreative())
{
Destroy();
TDI.FinalDamage = GetMaxHealth(); // Instant hit for creative
super::DoTakeDamage(TDI);
return; // No drops for creative
}
m_LastDamage = TDI.FinalDamage;
super::DoTakeDamage(TDI);
m_World->BroadcastEntityMetadata(*this);
if (GetHealth() <= 0)
{
Destroy();
cItems Drops;
switch (m_Payload)
{
case mpNone:
{
Drops.push_back(cItem(E_ITEM_MINECART, 1, 0));
break;
}
case mpChest:
{
Drops.push_back(cItem(E_ITEM_CHEST_MINECART, 1, 0));
break;
}
case mpFurnace:
{
Drops.push_back(cItem(E_ITEM_FURNACE_MINECART, 1, 0));
break;
}
case mpTNT:
{
Drops.push_back(cItem(E_ITEM_MINECART_WITH_TNT, 1, 0));
break;
}
case mpHopper:
{
Drops.push_back(cItem(E_ITEM_MINECART_WITH_HOPPER, 1, 0));
break;
}
default:
{
ASSERT(!"Unhandled minecart type when spawning pickup!");
return;
}
}
m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ());
}
}
void cMinecart::Destroyed()
{
if (m_bIsOnDetectorRail)
{
m_World->SetBlock(m_DetectorRailPosition.x, m_DetectorRailPosition.y, m_DetectorRailPosition.z, E_BLOCK_DETECTOR_RAIL, m_World->GetBlockMeta(m_DetectorRailPosition) & 0x07);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cRideableMinecart:
cRideableMinecart::cRideableMinecart(double a_X, double a_Y, double a_Z, const cItem & a_Content, int a_Height) :
super(mpNone, a_X, a_Y, a_Z),
m_Content(a_Content),
m_Height(a_Height)
{
}
void cRideableMinecart::OnRightClicked(cPlayer & a_Player)
{
if (m_Attachee != NULL)
{
if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
{
// This player is already sitting in, they want out.
a_Player.Detach();
return;
}
if (m_Attachee->IsPlayer())
{
// Another player is already sitting in here, cannot attach
return;
}
// Detach whatever is sitting in this minecart now:
m_Attachee->Detach();
}
// Attach the player to this minecart
a_Player.AttachTo(this);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cMinecartWithChest:
cMinecartWithChest::cMinecartWithChest(double a_X, double a_Y, double a_Z) :
super(mpChest, a_X, a_Y, a_Z)
{
}
void cMinecartWithChest::SetSlot(int a_Idx, const cItem & a_Item)
{
ASSERT((a_Idx >= 0) && (a_Idx < ARRAYCOUNT(m_Items)));
m_Items[a_Idx] = a_Item;
}
void cMinecartWithChest::OnRightClicked(cPlayer & a_Player)
{
// Show the chest UI window to the player
// TODO
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cMinecartWithFurnace:
cMinecartWithFurnace::cMinecartWithFurnace(double a_X, double a_Y, double a_Z) :
super(mpFurnace, a_X, a_Y, a_Z),
m_IsFueled(false),
m_FueledTimeLeft(-1)
{
}
void cMinecartWithFurnace::OnRightClicked(cPlayer & a_Player)
{
if (a_Player.GetEquippedItem().m_ItemType == E_ITEM_COAL)
{
if (!a_Player.IsGameModeCreative())
{
a_Player.GetInventory().RemoveOneEquippedItem();
}
if (!m_IsFueled) // We don't want to change the direction by right clicking it.
{
AddSpeed(a_Player.GetLookVector().x, 0, a_Player.GetLookVector().z);
}
m_IsFueled = true;
m_FueledTimeLeft = m_FueledTimeLeft + 600; // The minecart will be active 600 more ticks.
m_World->BroadcastEntityMetadata(*this);
}
}
void cMinecartWithFurnace::Tick(float a_Dt, cChunk & a_Chunk)
{
super::Tick(a_Dt, a_Chunk);
if (m_IsFueled)
{
m_FueledTimeLeft--;
if (m_FueledTimeLeft < 0)
{
m_IsFueled = false;
m_World->BroadcastEntityMetadata(*this);
return;
}
if (GetSpeed().Length() > 6)
{
return;
}
AddSpeed(GetSpeed() / 4);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cMinecartWithTNT:
cMinecartWithTNT::cMinecartWithTNT(double a_X, double a_Y, double a_Z) :
super(mpTNT, a_X, a_Y, a_Z)
{
}
// TODO: Make it activate when passing over activator rail
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cMinecartWithHopper:
cMinecartWithHopper::cMinecartWithHopper(double a_X, double a_Y, double a_Z) :
super(mpHopper, a_X, a_Y, a_Z)
{
}
// TODO: Make it suck up blocks and travel further than any other cart and physics and put and take blocks
// AND AVARYTHING!!
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