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#pragma once
// fwd: World.h
class cWorld;
class cPiston
{
public:
cPiston(cWorld * a_World);
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;
}
}
}
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 * );
/// 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);
} ;
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