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-rw-r--r--src/Blocks/BlockPiston.h134
1 files changed, 133 insertions, 1 deletions
diff --git a/src/Blocks/BlockPiston.h b/src/Blocks/BlockPiston.h
index 7632b5e5a..e6fa48e54 100644
--- a/src/Blocks/BlockPiston.h
+++ b/src/Blocks/BlockPiston.h
@@ -21,6 +21,138 @@ public:
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) override;
+
+ static NIBBLETYPE RotationPitchToMetaData(double a_Rotation, double a_Pitch)
+ {
+ if (a_Pitch >= 50)
+ {
+ return 0x1;
+ }
+ else if (a_Pitch <= -50)
+ {
+ return 0x0;
+ }
+ else
+ {
+ a_Rotation += 90 + 45; // So its not aligned with axis
+
+ if (a_Rotation > 360)
+ {
+ a_Rotation -= 360;
+ }
+ if ((a_Rotation >= 0) && (a_Rotation < 90))
+ {
+ return 0x4;
+ }
+ else if ((a_Rotation >= 180) && (a_Rotation < 270))
+ {
+ return 0x5;
+ }
+ else if ((a_Rotation >= 90) && (a_Rotation < 180))
+ {
+ return 0x2;
+ }
+ else
+ {
+ return 0x3;
+ }
+ }
+ }
+
+ static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
+ {
+ switch (a_MetaData)
+ {
+ case 0x0: return BLOCK_FACE_YM;
+ case 0x1: return BLOCK_FACE_YP;
+ 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:
+ {
+ ASSERT(!"Invalid Metadata");
+ return BLOCK_FACE_NONE;
+ }
+ }
+ }
+
+ static void ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
+ static void RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
+
+private:
+
+ /// Returns true if the piston (specified by blocktype) is a sticky piston
+ static inline bool IsSticky(BLOCKTYPE a_BlockType) { return (a_BlockType == E_BLOCK_STICKY_PISTON); }
+
+ /// Returns true if the piston (with the specified meta) is extended
+ static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }
+
+ /// Returns true if the specified block can be pushed by a piston (and left intact)
+ static inline bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+ {
+ switch (a_BlockType)
+ {
+ case E_BLOCK_ANVIL:
+ case E_BLOCK_BED:
+ case E_BLOCK_BEDROCK:
+ case E_BLOCK_BREWING_STAND:
+ case E_BLOCK_CHEST:
+ case E_BLOCK_COMMAND_BLOCK:
+ case E_BLOCK_DISPENSER:
+ case E_BLOCK_DROPPER:
+ case E_BLOCK_ENCHANTMENT_TABLE:
+ case E_BLOCK_END_PORTAL:
+ case E_BLOCK_END_PORTAL_FRAME:
+ case E_BLOCK_FURNACE:
+ case E_BLOCK_LIT_FURNACE:
+ case E_BLOCK_HOPPER:
+ case E_BLOCK_JUKEBOX:
+ case E_BLOCK_MOB_SPAWNER:
+ case E_BLOCK_NETHER_PORTAL:
+ case E_BLOCK_NOTE_BLOCK:
+ case E_BLOCK_OBSIDIAN:
+ case E_BLOCK_PISTON_EXTENSION:
+ {
+ return false;
+ }
+ case E_BLOCK_STICKY_PISTON:
+ case E_BLOCK_PISTON:
+ {
+ // A piston can only be pushed if retracted:
+ return !IsExtended(a_BlockMeta);
+ }
+ }
+ return true;
+ }
+
+ /// Returns true if the specified block can be pushed by a piston and broken / replaced
+ static inline bool CanBreakPush(BLOCKTYPE a_BlockType) { return cBlockInfo::IsPistonBreakable(a_BlockType); }
+
+ /// Returns true if the specified block can be pulled by a sticky piston
+ static inline bool CanPull(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
+ {
+ switch (a_BlockType)
+ {
+ case E_BLOCK_LAVA:
+ case E_BLOCK_STATIONARY_LAVA:
+ case E_BLOCK_STATIONARY_WATER:
+ case E_BLOCK_WATER:
+ {
+ return false;
+ }
+ }
+
+ if (CanBreakPush(a_BlockType))
+ {
+ return false; // CanBreakPush returns true, but we need false to prevent pulling
+ }
+
+ return CanPush(a_BlockType, a_BlockMeta);
+ }
+
+ /// Returns how many blocks the piston has to push (where the first free space is); < 0 when unpushable
+ static int FirstPassthroughBlock(int a_PistonX, int a_PistonY, int a_PistonZ, NIBBLETYPE a_PistonMeta, cWorld * a_World);
} ;
@@ -40,7 +172,7 @@ public:
virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
{
// No pickups
- // Also with 1.7, the item forms of these tecnical blocks have been removed, so giving someone this will crash their client...
+ // Also with 1.7, the item forms of these technical blocks have been removed, so giving someone this will crash their client...
}
} ;