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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
commit675b4aa878f16291ce33fced48a2bc7425f635ae (patch)
tree409914df27a98f65adf866da669429c4de141b6f /src/Blocks/BlockRail.h
parentLineBlockTracer: Using the coord-based block faces. (diff)
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Diffstat (limited to 'src/Blocks/BlockRail.h')
-rw-r--r--src/Blocks/BlockRail.h398
1 files changed, 398 insertions, 0 deletions
diff --git a/src/Blocks/BlockRail.h b/src/Blocks/BlockRail.h
new file mode 100644
index 000000000..24a101652
--- /dev/null
+++ b/src/Blocks/BlockRail.h
@@ -0,0 +1,398 @@
+
+#pragma once
+
+#include "BlockEntity.h"
+#include "../World.h"
+
+
+
+
+
+enum ENUM_PURE
+{
+ E_PURE_UPDOWN = 0,
+ E_PURE_DOWN = 1,
+ E_PURE_NONE = 2
+};
+
+
+
+
+
+class cBlockRailHandler :
+ public cBlockHandler
+{
+ typedef cBlockHandler super;
+
+public:
+ cBlockRailHandler(BLOCKTYPE a_BlockType)
+ : cBlockHandler(a_BlockType)
+ {
+ }
+
+ virtual bool GetPlacementBlockTypeMeta(
+ cWorld * a_World, cPlayer * a_Player,
+ int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
+ int a_CursorX, int a_CursorY, int a_CursorZ,
+ BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+ ) override
+ {
+ a_BlockType = m_BlockType;
+ a_BlockMeta = FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ);
+ return true;
+ }
+
+
+ virtual void OnNeighborChanged(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ) override
+ {
+ NIBBLETYPE Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+ if (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ) && (Meta != FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ)))
+ {
+ a_World->FastSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ));
+ }
+ }
+
+
+ virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
+ {
+ super::ConvertToPickups(a_Pickups, 0);
+ }
+
+
+ virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
+ {
+ if (a_RelY <= 0)
+ {
+ return false;
+ }
+ if (!g_BlockIsSolid[a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)])
+ {
+ return false;
+ }
+
+ NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
+ switch (Meta)
+ {
+ case E_META_RAIL_ASCEND_XP:
+ case E_META_RAIL_ASCEND_XM:
+ case E_META_RAIL_ASCEND_ZM:
+ case E_META_RAIL_ASCEND_ZP:
+ {
+ // Mapping between the meta and the neighbors that need checking
+ Meta -= E_META_RAIL_ASCEND_XP; // Base index at zero
+ static const struct
+ {
+ int x, z;
+ } Coords[] =
+ {
+ { 1, 0}, // east, XP
+ {-1, 0}, // west, XM
+ { 0, -1}, // north, ZM
+ { 0, 1}, // south, ZP
+ } ;
+ BLOCKTYPE BlockType;
+ NIBBLETYPE BlockMeta;
+ if (!a_Chunk.UnboundedRelGetBlock(a_RelX + Coords[Meta].x, a_RelY, a_RelZ + Coords[Meta].z, BlockType, BlockMeta))
+ {
+ // Too close to the edge, cannot simulate
+ return true;
+ }
+ return g_BlockIsSolid[BlockType];
+ }
+ }
+ return true;
+ }
+
+ NIBBLETYPE FindMeta(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+ {
+ NIBBLETYPE Meta = 0;
+ char RailsCnt = 0;
+ bool Neighbors[8]; // 0 - EAST, 1 - WEST, 2 - NORTH, 3 - SOUTH, 4 - EAST UP, 5 - WEST UP, 6 - NORTH UP, 7 - SOUTH UP
+ memset(Neighbors, false, sizeof(Neighbors));
+ Neighbors[0] = (IsUnstable(a_World, a_BlockX + 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN));
+ Neighbors[1] = (IsUnstable(a_World, a_BlockX - 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN));
+ Neighbors[2] = (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN));
+ Neighbors[3] = (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN));
+ Neighbors[4] = (IsUnstable(a_World, a_BlockX + 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST, E_PURE_NONE));
+ Neighbors[5] = (IsUnstable(a_World, a_BlockX - 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST, E_PURE_NONE));
+ Neighbors[6] = (IsUnstable(a_World, a_BlockX, a_BlockY + 1, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_NONE));
+ Neighbors[7] = (IsUnstable(a_World, a_BlockX, a_BlockY + 1, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_NONE));
+ if (IsUnstable(a_World, a_BlockX + 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_EAST))
+ Neighbors[0] = true;
+ if (IsUnstable(a_World, a_BlockX - 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_WEST))
+ Neighbors[1] = true;
+ if (IsUnstable(a_World, a_BlockX, a_BlockY - 1, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_NORTH))
+ Neighbors[2] = true;
+ if (IsUnstable(a_World, a_BlockX, a_BlockY - 1, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_SOUTH))
+ Neighbors[3] = true;
+ for (int i = 0; i < 8; i++)
+ {
+ if (Neighbors[i])
+ {
+ RailsCnt++;
+ }
+ }
+ if (RailsCnt == 1)
+ {
+ if (Neighbors[7]) return E_META_RAIL_ASCEND_ZP;
+ else if (Neighbors[6]) return E_META_RAIL_ASCEND_ZM;
+ else if (Neighbors[5]) return E_META_RAIL_ASCEND_XM;
+ else if (Neighbors[4]) return E_META_RAIL_ASCEND_XP;
+ else if (Neighbors[0] || Neighbors[1]) return E_META_RAIL_XM_XP;
+ else if (Neighbors[2] || Neighbors[3]) return E_META_RAIL_ZM_ZP;
+ ASSERT(!"Weird neighbor count");
+ return Meta;
+ }
+ for (int i = 0; i < 4; i++)
+ {
+ if (Neighbors[i + 4])
+ {
+ Neighbors[i] = true;
+ }
+ }
+ if (RailsCnt > 1)
+ {
+ if (Neighbors[3] && Neighbors[0]) return E_META_RAIL_CURVED_ZP_XP;
+ else if (Neighbors[3] && Neighbors[1]) return E_META_RAIL_CURVED_ZP_XM;
+ else if (Neighbors[2] && Neighbors[0]) return E_META_RAIL_CURVED_ZM_XP;
+ else if (Neighbors[2] && Neighbors[1]) return E_META_RAIL_CURVED_ZM_XM;
+ else if (Neighbors[7] && Neighbors[2]) return E_META_RAIL_ASCEND_ZP;
+ else if (Neighbors[3] && Neighbors[6]) return E_META_RAIL_ASCEND_ZM;
+ else if (Neighbors[5] && Neighbors[0]) return E_META_RAIL_ASCEND_XM;
+ else if (Neighbors[4] && Neighbors[1]) return E_META_RAIL_ASCEND_XP;
+ else if (Neighbors[0] && Neighbors[1]) return E_META_RAIL_XM_XP;
+ else if (Neighbors[2] && Neighbors[3]) return E_META_RAIL_ZM_ZP;
+ ASSERT(!"Weird neighbor count");
+ }
+ return Meta;
+ }
+
+
+ bool IsUnstable(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+ {
+ if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_RAIL)
+ {
+ return false;
+ }
+ NIBBLETYPE Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+ switch (Meta)
+ {
+ case E_META_RAIL_ZM_ZP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_XM_XP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_ASCEND_XP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_ASCEND_XM:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_ASCEND_ZM:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_ASCEND_ZP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_CURVED_ZP_XP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_CURVED_ZP_XM:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_CURVED_ZM_XM:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+
+ case E_META_RAIL_CURVED_ZM_XP:
+ {
+ if (
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) ||
+ IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
+ )
+ {
+ return true;
+ }
+ break;
+ }
+ }
+ return false;
+ }
+
+
+ bool IsNotConnected(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Pure = 0)
+ {
+ AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, false);
+ NIBBLETYPE Meta;
+ if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_RAIL)
+ {
+ if ((a_World->GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ) != E_BLOCK_RAIL) || (a_Pure != E_PURE_UPDOWN))
+ {
+ if ((a_World->GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ) != E_BLOCK_RAIL) || (a_Pure == E_PURE_NONE))
+ {
+ return true;
+ }
+ else
+ {
+ Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY - 1, a_BlockZ);
+ }
+ }
+ else
+ {
+ Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY + 1, a_BlockZ);
+ }
+ }
+ else
+ {
+ Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+ }
+
+ switch (a_BlockFace)
+ {
+ case BLOCK_FACE_NORTH:
+ {
+ if (
+ (Meta == E_META_RAIL_ZM_ZP) ||
+ (Meta == E_META_RAIL_ASCEND_ZM) ||
+ (Meta == E_META_RAIL_ASCEND_ZP) ||
+ (Meta == E_META_RAIL_CURVED_ZP_XP) ||
+ (Meta == E_META_RAIL_CURVED_ZP_XM)
+ )
+ {
+ return false;
+ }
+ break;
+ }
+
+ case BLOCK_FACE_SOUTH:
+ {
+ if (
+ (Meta == E_META_RAIL_ZM_ZP) ||
+ (Meta == E_META_RAIL_ASCEND_ZM) ||
+ (Meta == E_META_RAIL_ASCEND_ZP) ||
+ (Meta == E_META_RAIL_CURVED_ZM_XP) ||
+ (Meta == E_META_RAIL_CURVED_ZM_XM)
+ )
+ {
+ return false;
+ }
+ break;
+ }
+
+ case BLOCK_FACE_EAST:
+ {
+ if (
+ (Meta == E_META_RAIL_XM_XP) ||
+ (Meta == E_META_RAIL_ASCEND_XP) ||
+ (Meta == E_META_RAIL_ASCEND_XM) ||
+ (Meta == E_META_RAIL_CURVED_ZP_XM) ||
+ (Meta == E_META_RAIL_CURVED_ZM_XM)
+ )
+ {
+ return false;
+ }
+ break;
+ }
+ case BLOCK_FACE_WEST:
+ {
+ if (
+ (Meta == E_META_RAIL_XM_XP) ||
+ (Meta == E_META_RAIL_ASCEND_XP) ||
+ (Meta == E_META_RAIL_ASCEND_XM) ||
+ (Meta == E_META_RAIL_CURVED_ZP_XP) ||
+ (Meta == E_META_RAIL_CURVED_ZM_XP)
+ )
+ {
+ return false;
+ }
+ break;
+ }
+ }
+ return true;
+ }
+} ;
+
+
+
+