107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/* $NetBSD: shapes.c,v 1.9 2014/06/11 16:47:39 christos 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. 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 */
|
|
|
|
const struct shape shapes[] = {
|
|
/* 0*/ { 7, 7, { TL, TC, MR, } },
|
|
/* 1*/ { 1, 8, { TC, TR, ML, } },
|
|
/* 2*/ { 2, 9, { ML, MR, BC, } },
|
|
/* 3*/ { 3, 3, { TL, TC, ML, } },
|
|
/* 4*/ { 4, 12, { ML, BL, MR, } },
|
|
/* 5*/ { 5, 15, { ML, BR, MR, } },
|
|
/* 6*/ { 6, 18, { ML, MR, 2 } }, /* sticks out */
|
|
/* 7*/ { 7, 0, { TC, ML, BL, } },
|
|
/* 8*/ { 1, 1, { TC, MR, BR, } },
|
|
/* 9*/ { 2, 10, { TC, MR, BC, } },
|
|
/*10*/ { 2, 11, { TC, ML, MR, } },
|
|
/*11*/ { 2, 2, { TC, ML, BC, } },
|
|
/*12*/ { 4, 13, { TC, BC, BR, } },
|
|
/*13*/ { 4, 14, { TR, ML, MR, } },
|
|
/*14*/ { 4, 4, { TL, TC, BC, } },
|
|
/*15*/ { 5, 16, { TR, TC, BC, } },
|
|
/*16*/ { 5, 17, { TL, MR, ML, } },
|
|
/*17*/ { 5, 5, { TC, BC, BL, } },
|
|
/*18*/ { 6, 6, { TC, BC, 2*B_COLS } } /* sticks out */
|
|
};
|
|
|
|
/*
|
|
* Return true iff the given shape fits in the given position,
|
|
* taking the current board into account.
|
|
*/
|
|
int
|
|
fits_in(const struct shape *shape, int pos)
|
|
{
|
|
const 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(const struct shape *shape, int pos, int onoff)
|
|
{
|
|
const int *o = shape->off;
|
|
onoff = onoff ? shape->color : 0;
|
|
|
|
board[pos] = onoff;
|
|
board[pos + *o++] = onoff;
|
|
board[pos + *o++] = onoff;
|
|
board[pos + *o] = onoff;
|
|
}
|