95 lines
2.0 KiB
C++
95 lines
2.0 KiB
C++
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#pragma once
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#include "BlockHandler.h"
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#include "../Chunk.h"
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class cBlockWallSignHandler:
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public cBlockHandler
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{
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using Super = cBlockHandler;
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public:
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using Super::Super;
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/** Converts the block face of the neighbor to which the wallsign is attached to the wallsign block's meta. */
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static NIBBLETYPE BlockFaceToMetaData(eBlockFace a_NeighborBlockFace)
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{
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switch (a_NeighborBlockFace)
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{
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case BLOCK_FACE_ZM: return 0x02;
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case BLOCK_FACE_ZP: return 0x03;
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case BLOCK_FACE_XM: return 0x04;
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case BLOCK_FACE_XP: return 0x05;
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case BLOCK_FACE_NONE:
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case BLOCK_FACE_YP:
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case BLOCK_FACE_YM:
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{
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break;
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}
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}
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return 0x02;
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}
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private:
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virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) const override
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{
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return cItem(E_ITEM_SIGN, 1, 0);
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}
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virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) const override
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{
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auto NeighborPos = a_RelPos + GetOffsetBehindTheSign(a_Chunk.GetMeta(a_RelPos));
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BLOCKTYPE NeighborType;
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if (!a_Chunk.UnboundedRelGetBlockType(NeighborPos, NeighborType))
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{
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// The neighbor is not accessible (unloaded chunk), bail out without changing this
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return true;
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}
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return ((NeighborType == E_BLOCK_WALLSIGN) || (NeighborType == E_BLOCK_SIGN_POST) || cBlockInfo::IsSolid(NeighborType));
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}
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/** Returns the offset from the sign coords to the block to which the wallsign is attached, based on the wallsign's block meta.
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Asserts / returns a zero vector on wrong meta. */
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static Vector3i GetOffsetBehindTheSign(NIBBLETYPE a_BlockMeta)
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{
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switch (a_BlockMeta)
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{
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case 2: return Vector3i( 0, 0, 1);
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case 3: return Vector3i( 0, 0, -1);
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case 4: return Vector3i( 1, 0, 0);
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case 5: return Vector3i(-1, 0, 0);
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}
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ASSERT(!"Invalid wallsign block meta");
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return Vector3i();
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}
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
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{
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UNUSED(a_Meta);
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return 13;
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}
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} ;
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