From 8dc54301a4f0c1d92d9775c3f97901acbf0230f6 Mon Sep 17 00:00:00 2001 From: "madmaxoft@gmail.com" Date: Tue, 26 Mar 2013 21:06:12 +0000 Subject: BlockArea: Finished rotation and mirroring with meta. Implemented example meta handling for vines, stairs and torches. git-svn-id: http://mc-server.googlecode.com/svn/trunk@1319 0a769ca7-a7f5-676a-18bf-c427514a06d6 --- source/Blocks/BlockHandler.h | 15 ++++++++++ source/Blocks/BlockStairs.h | 71 ++++++++++++++++++++++++++++++++++++++++++++ source/Blocks/BlockTorch.h | 61 +++++++++++++++++++++++++++++++++++++ source/Blocks/BlockVine.h | 28 ++++++++++++++++- 4 files changed, 174 insertions(+), 1 deletion(-) (limited to 'source/Blocks') diff --git a/source/Blocks/BlockHandler.h b/source/Blocks/BlockHandler.h index 4c91463bc..cb52be497 100644 --- a/source/Blocks/BlockHandler.h +++ b/source/Blocks/BlockHandler.h @@ -112,6 +112,21 @@ public: */ virtual void Check(int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk); + /// Returns the meta for a block after rotating it counter-clockwise from the specified meta. Default: no change + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) { return a_Meta; } + + /// Returns the meta for a block after rotating it clockwise from the specified meta. Default: no change + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) { return a_Meta; } + + /// Returns the meta for a block after mirroring it around the XY plane. Default: no change + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) { return a_Meta; } + + /// Returns the meta for a block after mirroring it around the XZ plane. Default: no change + virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) { return a_Meta; } + + /// Returns the meta for a block after mirroring it around the YZ plane. Default: no change + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) { return a_Meta; } + /// Get the blockhandler for a specific block id static cBlockHandler * GetBlockHandler(BLOCKTYPE a_BlockType); diff --git a/source/Blocks/BlockStairs.h b/source/Blocks/BlockStairs.h index 6fcbc2cba..9f135b37d 100644 --- a/source/Blocks/BlockStairs.h +++ b/source/Blocks/BlockStairs.h @@ -49,6 +49,77 @@ public: } // TODO: step sound + + + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override + { + // Bits 3 and 4 stay, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x0c); + switch (a_Meta & 0x03) + { + case 0x00: return TopBits | 0x03; // East -> North + case 0x01: return TopBits | 0x02; // West -> South + case 0x02: return TopBits | 0x00; // South -> East + case 0x03: return TopBits | 0x01; // North -> West + } + // Not reachable, but to avoid a compiler warning: + return 0; + } + + + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override + { + // Bits 3 and 4 stay, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x0c); + switch (a_Meta & 0x03) + { + case 0x00: return TopBits | 0x02; // East -> South + case 0x01: return TopBits | 0x03; // West -> North + case 0x02: return TopBits | 0x01; // South -> West + case 0x03: return TopBits | 0x00; // North -> East + } + // Not reachable, but to avoid a compiler warning: + return 0; + } + + + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override + { + // Bits 3 and 4 stay, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x0c); + switch (a_Meta & 0x03) + { + case 0x00: return TopBits | 0x00; // East -> East + case 0x01: return TopBits | 0x01; // West -> West + case 0x02: return TopBits | 0x03; // South -> North + case 0x03: return TopBits | 0x02; // North -> South + } + // Not reachable, but to avoid a compiler warning: + return 0; + } + + + virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override + { + // Toggle bit 3: + return (a_Meta & 0x0b) | ((~a_Meta) & 0x04); + } + + + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override + { + // Bits 3 and 4 stay, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x0c); + switch (a_Meta & 0x03) + { + case 0x00: return TopBits | 0x01; // East -> West + case 0x01: return TopBits | 0x00; // West -> East + case 0x02: return TopBits | 0x02; // South -> South + case 0x03: return TopBits | 0x03; // North -> North + } + // Not reachable, but to avoid a compiler warning: + return 0; + } } ; diff --git a/source/Blocks/BlockTorch.h b/source/Blocks/BlockTorch.h index 3cc487421..97e31533b 100644 --- a/source/Blocks/BlockTorch.h +++ b/source/Blocks/BlockTorch.h @@ -132,6 +132,67 @@ public: { return "step.wood"; } + + + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x04; // East -> North + case 0x02: return TopBits | 0x03; // West -> South + case 0x03: return TopBits | 0x01; // South -> East + case 0x04: return TopBits | 0x02; // North -> West + default: return a_Meta; // Floor -> Floor + } + } + + + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x03; // East -> South + case 0x02: return TopBits | 0x04; // West -> North + case 0x03: return TopBits | 0x02; // South -> West + case 0x04: return TopBits | 0x01; // North -> East + default: return a_Meta; // Floor -> Floor + } + } + + + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x03: return TopBits | 0x04; // South -> North + case 0x04: return TopBits | 0x03; // North -> South + default: return a_Meta; // Keep the rest + } + } + + + // Mirroring around the XZ plane doesn't make sense for floor torches, + // the others stay the same, so let's keep all the metas the same. + // The base class does tht for us, no need to override MetaMirrorXZ() + + + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x02; // East -> West + case 0x02: return TopBits | 0x01; // West -> East + default: return a_Meta; // Keep the rest + } + } } ; diff --git a/source/Blocks/BlockVine.h b/source/Blocks/BlockVine.h index 88338e86d..67376a4d8 100644 --- a/source/Blocks/BlockVine.h +++ b/source/Blocks/BlockVine.h @@ -138,10 +138,36 @@ public: } - bool DoesDropOnUnsuitable(void) + virtual bool DoesDropOnUnsuitable(void) override { return false; } + + + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override + { + return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f; // Rotate bits to the right + } + + + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override + { + return ((a_Meta << 1) | (a_Meta >> 3)) & 0x0f; // Rotate bits to the left + } + + + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override + { + // Bits 2 and 4 stay, bits 1 and 3 swap + return ((a_Meta & 0x0a) | ((a_Meta & 0x01) << 2) | ((a_Meta & 0x04) >> 2)); + } + + + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override + { + // Bits 1 and 3 stay, bits 2 and 4 swap + return ((a_Meta & 0x05) | ((a_Meta & 0x02) << 2) | ((a_Meta & 0x08) >> 2)); + } } ; -- cgit v1.2.3