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https://github.com/nippur72/apple1-videocard-lib.git
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57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
#ifndef PIECES_H
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#define PIECES_H
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#define NUMPIECES 7 // number of tetrominos in tetris
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#define NUMTILES 4 // number of tiles in a piece
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#define NUMROT 4 // number of rotations of a piece
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// offset of a single tile composing a piece
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typedef struct {
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byte offset_x;
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byte offset_y;
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} tile_offset;
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tile_offset *get_piece_offsets(byte piece, byte angle);
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#pragma data_seg(Code)
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tile_offset pieces_XY[NUMPIECES*NUMTILES*NUMROT] = {
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{+1,+1} , {+2,+1} , {+3,+1} , {+1,+2} , // L
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{+2,+0} , {+2,+1} , {+2,+2} , {+3,+2} ,
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{+3,+0} , {+1,+1} , {+2,+1} , {+3,+1} ,
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{+1,+0} , {+2,+0} , {+2,+1} , {+2,+2} ,
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{+1,+1} , {+2,+1} , {+3,+1} , {+3,+2} , // J
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{+2,+0} , {+3,+0} , {+2,+1} , {+2,+2} ,
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{+1,+0} , {+1,+1} , {+2,+1} , {+3,+1} ,
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{+2,+0} , {+2,+1} , {+1,+2} , {+2,+2} ,
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{+1,+0} , {+0,+1} , {+1,+1} , {+2,+1} , // T
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{+1,+0} , {+0,+1} , {+1,+1} , {+1,+2} ,
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{+0,+1} , {+1,+1} , {+2,+1} , {+1,+2} ,
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{+1,+0} , {+1,+1} , {+2,+1} , {+1,+2} ,
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{+0,+1} , {+1,+1} , {+2,+1} , {+3,+1} , // I
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{+1,+0} , {+1,+1} , {+1,+2} , {+1,+3} ,
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{+0,+1} , {+1,+1} , {+2,+1} , {+3,+1} ,
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{+1,+0} , {+1,+1} , {+1,+2} , {+1,+3} ,
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{+1,+0} , {+2,+0} , {+1,+1} , {+2,+1} , // O
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{+1,+0} , {+2,+0} , {+1,+1} , {+2,+1} ,
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{+1,+0} , {+2,+0} , {+1,+1} , {+2,+1} ,
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{+1,+0} , {+2,+0} , {+1,+1} , {+2,+1} ,
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{+2,+0} , {+3,+0} , {+1,+1} , {+2,+1} , // S
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{+1,+0} , {+1,+1} , {+2,+1} , {+2,+2} ,
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{+2,+0} , {+3,+0} , {+1,+1} , {+2,+1} ,
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{+1,+0} , {+1,+1} , {+2,+1} , {+2,+2} ,
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{+1,+0} , {+2,+0} , {+2,+1} , {+3,+1} , // Z
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{+2,+0} , {+1,+1} , {+2,+1} , {+1,+2} ,
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{+1,+0} , {+2,+0} , {+2,+1} , {+3,+1} ,
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{+2,+0} , {+1,+1} , {+2,+1} , {+1,+2}
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};
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#pragma data_seg(Data)
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// given a piece number and an angle returns the 4 byte "offsets" of the piece
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tile_offset *get_piece_offsets(byte piece, byte angle) {
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return &pieces_XY[(piece*sizeof(tile_offset)*4*2)+angle*4];
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}
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#endif
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