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authorTiger Wang <ziwei.tiger@outlook.com>2021-05-05 15:25:10 +0200
committerGitHub <noreply@github.com>2021-05-05 15:25:10 +0200
commita62b2b1be2103d7de2fd66c7304b7473e369be3c (patch)
treea44f2b43fd90f5c79af5e308b554349e6dc546af /src/Blocks/BlockVine.h
parentRename files to match code (diff)
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Diffstat (limited to 'src/Blocks/BlockVine.h')
-rw-r--r--src/Blocks/BlockVine.h115
1 files changed, 49 insertions, 66 deletions
diff --git a/src/Blocks/BlockVine.h b/src/Blocks/BlockVine.h
index 51f6112bc..da4d6dfc3 100644
--- a/src/Blocks/BlockVine.h
+++ b/src/Blocks/BlockVine.h
@@ -17,33 +17,14 @@ public:
private:
- 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
- ) const override
- {
- // TODO: Disallow placement where the vine doesn't attach to something properly
- BLOCKTYPE BlockType = 0;
- NIBBLETYPE BlockMeta;
- a_ChunkInterface.GetBlockTypeMeta(a_PlacedBlockPos, BlockType, BlockMeta);
- if (BlockType == m_BlockType)
- {
- a_BlockMeta = BlockMeta | DirectionToMetaData(a_ClickedBlockFace);
- }
- else
- {
- a_BlockMeta = DirectionToMetaData(a_ClickedBlockFace);
- }
- a_BlockType = m_BlockType;
- return true;
- }
-
+ static const NIBBLETYPE VINE_LOST_SUPPORT = 16;
+ static const NIBBLETYPE VINE_UNCHANGED = 17;
+ virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
+ {
+ return GetMaxMeta(a_Chunk, a_Position, a_Meta) != VINE_LOST_SUPPORT;
+ }
virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
@@ -60,22 +41,6 @@ private:
- static NIBBLETYPE DirectionToMetaData(char a_BlockFace)
- {
- switch (a_BlockFace)
- {
- case BLOCK_FACE_NORTH: return 0x1;
- case BLOCK_FACE_SOUTH: return 0x4;
- case BLOCK_FACE_WEST: return 0x8;
- case BLOCK_FACE_EAST: return 0x2;
- default: return 0x0;
- }
- }
-
-
-
-
-
static char MetaDataToDirection(NIBBLETYPE a_MetaData)
{
switch (a_MetaData)
@@ -122,8 +87,9 @@ private:
- /** Returns the meta that has the maximum allowable sides of the vine, given the surroundings */
- static NIBBLETYPE GetMaxMeta(cChunk & a_Chunk, Vector3i a_RelPos)
+ /** Returns the meta that has the maximum allowable sides of the vine, given the surroundings and current vine meta.
+ Returns special values for a vine that can continue to exist unchanged, or must die completely. */
+ static NIBBLETYPE GetMaxMeta(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_CurrentMeta)
{
static const struct
{
@@ -136,21 +102,41 @@ private:
{ 0, -1, 4}, // north, ZM
{ 1, 0, 8}, // east, XP
} ;
- NIBBLETYPE res = 0;
+
+ NIBBLETYPE MaxMeta = 0;
for (auto & Coord : Coords)
{
BLOCKTYPE BlockType;
NIBBLETYPE BlockMeta;
- auto checkPos = a_RelPos.addedXZ(Coord.x, Coord.z);
+ auto checkPos = a_Position.addedXZ(Coord.x, Coord.z);
if (
a_Chunk.UnboundedRelGetBlock(checkPos.x, checkPos.y, checkPos.z, BlockType, BlockMeta) &&
IsBlockAttachable(BlockType)
)
{
- res |= Coord.Bit;
+ MaxMeta |= Coord.Bit;
}
}
- return res;
+
+ // Check if vine above us, add its meta to MaxMeta:
+ if ((a_Position.y < cChunkDef::Height - 1) && (a_Chunk.GetBlock(a_Position.addedY(1)) == E_BLOCK_VINES))
+ {
+ MaxMeta |= a_Chunk.GetMeta(a_Position.addedY(1));
+ }
+
+ NIBBLETYPE Common = a_CurrentMeta & MaxMeta; // Neighbors that we have and are legal.
+ if (Common != a_CurrentMeta)
+ {
+ bool HasTop = (a_Position.y < (cChunkDef::Height - 1)) && IsBlockAttachable(a_Chunk.GetBlock(a_Position.addedY(1)));
+ if ((Common == 0) && !HasTop) // Meta equals 0 also means top. Make a last-ditch attempt to save the vine.
+ {
+ return VINE_LOST_SUPPORT;
+ }
+
+ return Common;
+ }
+
+ return VINE_UNCHANGED;
}
@@ -162,28 +148,25 @@ private:
a_ChunkInterface.DoWithChunkAt(a_BlockPos, [&](cChunk & a_Chunk)
{
- const auto a_RelPos = cChunkDef::AbsoluteToRelative(a_BlockPos);
- NIBBLETYPE CurMeta = a_Chunk.GetMeta(a_RelPos);
- NIBBLETYPE MaxMeta = GetMaxMeta(a_Chunk, a_RelPos);
+ const auto Position = cChunkDef::AbsoluteToRelative(a_BlockPos);
+ const auto MaxMeta = GetMaxMeta(a_Chunk, Position, a_Chunk.GetMeta(Position));
- // Check if vine above us, add its meta to MaxMeta
- if ((a_RelPos.y < cChunkDef::Height - 1) && (a_Chunk.GetBlock(a_RelPos.addedY(1)) == m_BlockType))
+ if (MaxMeta == VINE_UNCHANGED)
{
- MaxMeta |= a_Chunk.GetMeta(a_RelPos.addedY(1));
+ return false;
}
- NIBBLETYPE Common = CurMeta & MaxMeta; // Neighbors that we have and are legal
- if (Common != CurMeta)
+ // There is a neighbor missing, need to update the meta or even destroy the block.
+
+ if (MaxMeta == VINE_LOST_SUPPORT)
{
- // There is a neighbor missing, need to update the meta or even destroy the block
- bool HasTop = (a_RelPos.y < cChunkDef::Height - 1) && IsBlockAttachable(a_Chunk.GetBlock(a_RelPos.addedY(1)));
- if ((Common == 0) && !HasTop)
- {
- // The vine just lost all its support, destroy the block:
- a_Chunk.SetBlock(a_RelPos, E_BLOCK_AIR, 0);
- return false;
- }
- a_Chunk.SetBlock(a_RelPos, m_BlockType, Common);
+ // The vine just lost all its support, destroy the block:
+ a_Chunk.SetBlock(Position, E_BLOCK_AIR, 0);
+ }
+ else
+ {
+ // It lost some of its support, set it to what remains (SetBlock to notify neighbors):
+ a_Chunk.SetBlock(Position, E_BLOCK_VINES, MaxMeta);
}
return false;
@@ -194,9 +177,9 @@ private:
- virtual bool DoesIgnoreBuildCollision(cChunkInterface & a_ChunkInterface, Vector3i a_Pos, cPlayer & a_Player, NIBBLETYPE a_Meta) const override
+ virtual bool DoesIgnoreBuildCollision(const cWorld & a_World, const cItem & a_HeldItem, const Vector3i a_Position, const NIBBLETYPE a_Meta, const eBlockFace a_ClickedBlockFace, const bool a_ClickedDirectly) const override
{
- return true;
+ return !a_ClickedDirectly || (a_HeldItem.m_ItemType != m_BlockType);
}