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-rw-r--r--source/Piston.h28
1 files changed, 26 insertions, 2 deletions
diff --git a/source/Piston.h b/source/Piston.h
index 67aa80d67..cc051e454 100644
--- a/source/Piston.h
+++ b/source/Piston.h
@@ -57,12 +57,36 @@ public:
void ExtendPiston( int, int, int );
void RetractPiston( int, int, int );
-
+
+ /// Returns true if the piston (specified by blocktype) is a sticky piston
+ static bool IsSticky(BLOCKTYPE a_BlockType);
+
+ /// Returns true if the piston (with the specified meta) is extended
+ static bool IsExtended(NIBBLETYPE a_PistonMeta);
+
+ /// Returns true if the extension (with the specified meta) is sticky
+ static bool IsStickyExtension(NIBBLETYPE a_ExtMeta);
+
+ /// Returns true if the specified block can be pushed by a piston (and left intact)
+ static bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+ /// Returns true if the specified block can be pushed by a piston and broken / replaced
+ static bool CanBreakPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+ /// Returns true if the specified block can be pulled by a sticky piston
+ static bool CanPull(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+
+ /// Updates the coords by the specified amount in the direction a piston of the specified meta is facing
+ static void AddDir(int & a_BlockX, int & a_BlockY, int & a_BlockZ, NIBBLETYPE a_PistonMeta, int a_Amount);
+
+
cWorld * m_World;
private:
void ChainMove( int, int, int, char, unsigned short * );
- unsigned short FirstPassthroughBlock( int, int, int, char );
+
+ /// Returns how many blocks the piston has to push (where the first free space is); <0 when unpushable
+ int FirstPassthroughBlock(int a_PistonX, int a_PistonY, int a_PistonZ, NIBBLETYPE a_PistonMeta);
} ;