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/*
* Netris -- A free networked version of T*tris
* Copyright (C) 1994-1996,1999 Mark H. Weaver <mhw@netris.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: shapes.c,v 1.16 1999/05/16 06:56:31 mhw Exp $
*/
#include "netris.h"
#include <stdlib.h>
#define ShapeName(name, dir) \
shape_ ## name ## _ ## dir
#define PreDecl(name, dir) \
static Shape ShapeName(name, dir)
#define StdShape(name, cmdName, mirror, type, realDir, dir, nextDir) \
static Shape ShapeName(name, dir) = { &ShapeName(name, nextDir), \
0, 0, mirror, D_ ## realDir, type, cmds_ ## cmdName }
#define FourWayDecl(name, cmdName, mirror, type) \
PreDecl(name, down); \
StdShape(name, cmdName, mirror, type, left, left, down); \
StdShape(name, cmdName, mirror, type, up, up, left); \
StdShape(name, cmdName, mirror, type, right, right, up); \
StdShape(name, cmdName, mirror, type, down, down, right)
#define TwoWayDecl(name, cmdName, mirror, type) \
PreDecl(name, vert); \
StdShape(name, cmdName, mirror, type, right, horiz, vert); \
StdShape(name, cmdName, mirror, type, down, vert, horiz)
static Cmd cmds_long[] = { C_back, C_plot, C_forw, C_plot, C_forw, C_plot,
C_forw, C_plot, C_end };
TwoWayDecl(long, long, 0, BT_blue);
static Cmd cmds_square[] = { C_plot, C_forw, C_left, C_plot, C_forw, C_left,
C_plot, C_forw, C_left, C_plot, C_end };
static Shape shape_square = { &shape_square, 0, 0, D_up, 0, BT_magenta,
cmds_square };
static Cmd cmds_l[] = { C_right, C_back, C_plot, C_forw, C_plot, C_forw,
C_plot, C_left, C_forw, C_plot, C_end };
FourWayDecl(l, l, 0, BT_cyan);
FourWayDecl(l1, l, 1, BT_yellow);
static Cmd cmds_t[] = { C_plot, C_forw, C_plot, C_back, C_right, C_forw,
C_plot, C_back, C_back, C_plot, C_end };
FourWayDecl(t, t, 0, BT_white);
static Cmd cmds_s[] = { C_back, C_plot, C_forw, C_plot, C_left, C_forw,
C_plot, C_right, C_forw, C_plot, C_end };
TwoWayDecl(s, s, 0, BT_green);
TwoWayDecl(s1, s, 1, BT_red);
ShapeOption stdOptions[] = {
{1, &shape_long_horiz},
{1, &shape_square},
{1, &shape_l_down},
{1, &shape_l1_down},
{1, &shape_t_down},
{1, &shape_s_horiz},
{1, &shape_s1_horiz},
{0, NULL}};
Shape *netMapping[] = {
&shape_long_horiz,
&shape_long_vert,
&shape_square,
&shape_l_down,
&shape_l_right,
&shape_l_up,
&shape_l_left,
&shape_l1_down,
&shape_l1_right,
&shape_l1_up,
&shape_l1_left,
&shape_t_down,
&shape_t_right,
&shape_t_up,
&shape_t_left,
&shape_s_horiz,
&shape_s_vert,
&shape_s1_horiz,
&shape_s1_vert,
NULL};
ExtFunc void MoveInDir(Dir dir, int dist, int *y, int *x)
{
switch (dir) {
case D_down: *y -= dist; break;
case D_right: *x += dist; break;
case D_up: *y += dist; break;
case D_left: *x -= dist; break;
default:
assert(0);
}
}
ExtFunc Dir RotateDir(Dir dir, int delta)
{
return 3 & (dir + delta);
}
ExtFunc int ShapeIterate(Shape *s, int scr, int y, int x, int falling,
ExtFunc ShapeDrawFunc func, void *data)
{
int i, mirror, result;
Dir dir;
BlockType type;
y += s->initY;
x += s->initX;
dir = s->initDir;
type = falling ? -s->type : s->type;
mirror = s->mirrored ? -1 : 1;
for (i = 0; s->cmds[i] != C_end; ++i)
switch (s->cmds[i]) {
case C_forw:
MoveInDir(dir, 1, &y, &x);
break;
case C_back:
MoveInDir(dir, -1, &y, &x);
break;
case C_left:
dir = RotateDir(dir, mirror);
break;
case C_right:
dir = RotateDir(dir, -mirror);
break;
case C_plot:
if ((result = func(scr, y, x, type, data)))
return result;
break;
default:
assert(0);
}
return 0;
}
ExtFunc Shape *ChooseOption(ShapeOption *options)
{
int i;
float total = 0, val;
for (i = 0; options[i].shape; ++i)
total += options[i].weight;
val = Random(0, 32767) / 32768.0 * total;
for (i = 0; options[i].shape; ++i) {
val -= options[i].weight;
if (val < 0)
return options[i].shape;
}
return options[0].shape;
}
ExtFunc short ShapeToNetNum(Shape *shape)
{
int num;
for (num = 0; netMapping[num]; ++num)
if (netMapping[num] == shape)
return num;
assert(0);
return 0;
}
ExtFunc Shape *NetNumToShape(short num)
{
assert(num >= 0 && num < sizeof(netMapping) / sizeof(netMapping[0]) - 1);
return netMapping[num];
}
/*
* vi: ts=4 ai
* vim: noai si
*/
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