156 lines
3.6 KiB
C++
156 lines
3.6 KiB
C++
|
|
#pragma once
|
|
|
|
#include "BlockHandler.h"
|
|
#include "Mixins.h"
|
|
|
|
|
|
|
|
|
|
|
|
class cBlockLadderHandler:
|
|
public cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x02, 0x05, 0x03, 0x04> >
|
|
{
|
|
using Super = cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x02, 0x05, 0x03, 0x04>>;
|
|
|
|
public:
|
|
|
|
cBlockLadderHandler(BLOCKTYPE a_BlockType):
|
|
Super(a_BlockType)
|
|
{
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
virtual bool GetPlacementBlockTypeMeta(
|
|
cChunkInterface & a_ChunkInterface,
|
|
cPlayer & a_Player,
|
|
const Vector3i a_PlacedBlockPos,
|
|
eBlockFace a_ClickedBlockFace,
|
|
const Vector3i a_CursorPos,
|
|
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
|
|
) override
|
|
{
|
|
// Try finding a suitable neighbor block face for the ladder; start with the given one.
|
|
if (!LadderCanBePlacedAt(a_ChunkInterface, a_PlacedBlockPos, a_ClickedBlockFace))
|
|
{
|
|
a_ClickedBlockFace = FindSuitableBlockFace(a_ChunkInterface, a_PlacedBlockPos);
|
|
if (a_ClickedBlockFace == BLOCK_FACE_NONE)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
a_BlockType = m_BlockType;
|
|
a_BlockMeta = BlockFaceToMetaData(a_ClickedBlockFace);
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/** Converts the block face of the neighbor to which the ladder is attached to the ladder block's meta. */
|
|
static NIBBLETYPE BlockFaceToMetaData(eBlockFace a_NeighborBlockFace)
|
|
{
|
|
switch (a_NeighborBlockFace)
|
|
{
|
|
case BLOCK_FACE_ZM: return 0x2;
|
|
case BLOCK_FACE_ZP: return 0x3;
|
|
case BLOCK_FACE_XM: return 0x4;
|
|
case BLOCK_FACE_XP: return 0x5;
|
|
case BLOCK_FACE_NONE:
|
|
case BLOCK_FACE_YM:
|
|
case BLOCK_FACE_YP:
|
|
{
|
|
return 0x2;
|
|
}
|
|
}
|
|
UNREACHABLE("Unsupported neighbor block face");
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/** Converts the ladder block's meta to the block face of the neighbor to which the ladder is attached. */
|
|
static eBlockFace MetaDataToBlockFace(NIBBLETYPE a_MetaData)
|
|
{
|
|
switch (a_MetaData)
|
|
{
|
|
case 0x2: return BLOCK_FACE_ZM;
|
|
case 0x3: return BLOCK_FACE_ZP;
|
|
case 0x4: return BLOCK_FACE_XM;
|
|
case 0x5: return BLOCK_FACE_XP;
|
|
default: return BLOCK_FACE_ZM;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/** Finds a suitable block face value for the Ladder.
|
|
The returned value is the block face of the neighbor of the specified block to which a ladder at a_LadderPos can be attached.
|
|
Returns BLOCK_FACE_NONE if no valid location is found */
|
|
static eBlockFace FindSuitableBlockFace(cChunkInterface & a_ChunkInterface, const Vector3i a_LadderPos)
|
|
{
|
|
for (int FaceInt = BLOCK_FACE_ZM; FaceInt <= BLOCK_FACE_XP; FaceInt++)
|
|
{
|
|
eBlockFace Face = static_cast<eBlockFace>(FaceInt);
|
|
if (LadderCanBePlacedAt(a_ChunkInterface, a_LadderPos, Face))
|
|
{
|
|
return Face;
|
|
}
|
|
}
|
|
return BLOCK_FACE_NONE;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/** Returns true if the ladder in the specified position will be supported by its neghbor through the specified neighbor's blockface. */
|
|
static bool LadderCanBePlacedAt(cChunkInterface & a_ChunkInterface, const Vector3i a_LadderPos, eBlockFace a_NeighborBlockFace)
|
|
{
|
|
if (
|
|
(a_NeighborBlockFace == BLOCK_FACE_NONE) ||
|
|
(a_NeighborBlockFace == BLOCK_FACE_BOTTOM) ||
|
|
(a_NeighborBlockFace == BLOCK_FACE_TOP)
|
|
)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
auto NeighborPos = AddFaceDirection(a_LadderPos, a_NeighborBlockFace, true);
|
|
return cBlockInfo::IsSolid(a_ChunkInterface.GetBlock(NeighborPos));
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) override
|
|
{
|
|
auto NeighborBlockFace = MetaDataToBlockFace(a_Chunk.GetMeta(a_RelPos));
|
|
auto LadderAbsPos = a_Chunk.RelativeToAbsolute(a_RelPos);
|
|
return LadderCanBePlacedAt(a_ChunkInterface, LadderAbsPos, NeighborBlockFace);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
|
|
{
|
|
UNUSED(a_Meta);
|
|
return 0;
|
|
}
|
|
} ;
|
|
|
|
|
|
|
|
|