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Diffstat (limited to 'games/tetris/shapes.c')
-rw-r--r-- | games/tetris/shapes.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/games/tetris/shapes.c b/games/tetris/shapes.c new file mode 100644 index 00000000000..5421bcf0ef8 --- /dev/null +++ b/games/tetris/shapes.c @@ -0,0 +1,113 @@ +/* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek and Darren F. Provine. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)shapes.c 8.1 (Berkeley) 5/31/93 + */ + +/* + * Tetris shapes and related routines. + * + * Note that the first 7 are `well known'. + */ + +#include <sys/cdefs.h> +#include "tetris.h" + +#define TL -B_COLS-1 /* top left */ +#define TC -B_COLS /* top center */ +#define TR -B_COLS+1 /* top right */ +#define ML -1 /* middle left */ +#define MR 1 /* middle right */ +#define BL B_COLS-1 /* bottom left */ +#define BC B_COLS /* bottom center */ +#define BR B_COLS+1 /* bottom right */ + +struct shape shapes[] = { + /* 0*/ 7, TL, TC, MR, + /* 1*/ 8, TC, TR, ML, + /* 2*/ 9, ML, MR, BC, + /* 3*/ 3, TL, TC, ML, + /* 4*/ 12, ML, BL, MR, + /* 5*/ 15, ML, BR, MR, + /* 6*/ 18, ML, MR, /* sticks out */ 2, + /* 7*/ 0, TC, ML, BL, + /* 8*/ 1, TC, MR, BR, + /* 9*/ 10, TC, MR, BC, + /*10*/ 11, TC, ML, MR, + /*11*/ 2, TC, ML, BC, + /*12*/ 13, TC, BC, BR, + /*13*/ 14, TR, ML, MR, + /*14*/ 4, TL, TC, BC, + /*15*/ 16, TR, TC, BC, + /*16*/ 17, TL, MR, ML, + /*17*/ 5, TC, BC, BL, + /*18*/ 6, TC, BC, /* sticks out */ 2*B_COLS, +}; + +/* + * Return true iff the given shape fits in the given position, + * taking the current board into account. + */ +int +fits_in(shape, pos) + struct shape *shape; + register int pos; +{ + register int *o = shape->off; + + if (board[pos] || board[pos + *o++] || board[pos + *o++] || + board[pos + *o]) + return 0; + return 1; +} + +/* + * Write the given shape into the current board, turning it on + * if `onoff' is 1, and off if `onoff' is 0. + */ +void +place(shape, pos, onoff) + struct shape *shape; + register int pos, onoff; +{ + register int *o = shape->off; + + board[pos] = onoff; + board[pos + *o++] = onoff; + board[pos + *o++] = onoff; + board[pos + *o] = onoff; +} |