153 lines
3.6 KiB
C++
153 lines
3.6 KiB
C++
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#pragma once
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#include "BlockHandler.h"
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class cBlockStairsHandler :
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public cBlockHandler
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{
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public:
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cBlockStairsHandler(BLOCKTYPE a_BlockType) :
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cBlockHandler(a_BlockType)
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{
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}
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virtual bool GetPlacementBlockTypeMeta(
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cWorld * a_World, cPlayer * a_Player,
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int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
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int a_CursorX, int a_CursorY, int a_CursorZ,
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BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
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) override
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{
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a_BlockType = m_BlockType;
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a_BlockMeta = RotationToMetaData(a_Player->GetRotation());
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switch (a_BlockFace)
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{
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case BLOCK_FACE_TOP: break;
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case BLOCK_FACE_BOTTOM: a_BlockMeta = a_BlockMeta | 0x4; break; // When placing onto a bottom face, always place an upside-down stairs block
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case BLOCK_FACE_EAST:
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case BLOCK_FACE_NORTH:
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case BLOCK_FACE_SOUTH:
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case BLOCK_FACE_WEST:
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{
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// When placing onto a sideways face, check cursor, if in top half, make it an upside-down stairs block
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if (a_CursorY > 8)
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{
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a_BlockMeta |= 0x4;
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}
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break;
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}
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}
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return true;
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}
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// TODO: step sound
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static NIBBLETYPE RotationToMetaData(double a_Rotation)
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{
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a_Rotation += 90 + 45; // So its not aligned with axis
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if (a_Rotation > 360)
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{
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a_Rotation -= 360;
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}
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if ((a_Rotation >= 0) && (a_Rotation < 90))
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{
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return 0x0;
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}
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else if ((a_Rotation >= 180) && (a_Rotation < 270))
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{
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return 0x1;
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}
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else if ((a_Rotation >= 90) && (a_Rotation < 180))
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{
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return 0x2;
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}
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else
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{
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return 0x3;
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}
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}
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virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
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{
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// Bits 3 and 4 stay, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x0c);
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switch (a_Meta & 0x03)
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{
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case 0x00: return TopBits | 0x03; // East -> North
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case 0x01: return TopBits | 0x02; // West -> South
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case 0x02: return TopBits | 0x00; // South -> East
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case 0x03: return TopBits | 0x01; // North -> West
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}
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// Not reachable, but to avoid a compiler warning:
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return 0;
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}
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virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
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{
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// Bits 3 and 4 stay, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x0c);
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switch (a_Meta & 0x03)
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{
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case 0x00: return TopBits | 0x02; // East -> South
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case 0x01: return TopBits | 0x03; // West -> North
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case 0x02: return TopBits | 0x01; // South -> West
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case 0x03: return TopBits | 0x00; // North -> East
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}
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// Not reachable, but to avoid a compiler warning:
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return 0;
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}
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virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
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{
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// Bits 3 and 4 stay, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x0c);
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switch (a_Meta & 0x03)
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{
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case 0x00: return TopBits | 0x00; // East -> East
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case 0x01: return TopBits | 0x01; // West -> West
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case 0x02: return TopBits | 0x03; // South -> North
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case 0x03: return TopBits | 0x02; // North -> South
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}
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// Not reachable, but to avoid a compiler warning:
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return 0;
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}
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virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override
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{
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// Toggle bit 3:
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return (a_Meta & 0x0b) | ((~a_Meta) & 0x04);
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}
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virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
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{
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// Bits 3 and 4 stay, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x0c);
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switch (a_Meta & 0x03)
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{
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case 0x00: return TopBits | 0x01; // East -> West
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case 0x01: return TopBits | 0x00; // West -> East
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case 0x02: return TopBits | 0x02; // South -> South
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case 0x03: return TopBits | 0x03; // North -> North
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}
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// Not reachable, but to avoid a compiler warning:
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return 0;
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}
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} ;
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