1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/util.h"
#include "sky/autoroute.h"
#include "sky/compact.h"
#include "sky/grid.h"
#include "sky/skydefs.h"
#include "sky/struc.h"
#define ROUTE_GRID_WIDTH ((GAME_SCREEN_WIDTH/8)+2)
#define ROUTE_GRID_HEIGHT ((GAME_SCREEN_HEIGHT/8)+2)
#define ROUTE_GRID_SIZE (ROUTE_GRID_WIDTH*ROUTE_GRID_HEIGHT*2)
#define WALK_JUMP 8 // walk in blocks of 8
const int16 SkyAutoRoute::_routeDirections[4] = { -1, 1, -ROUTE_GRID_WIDTH, ROUTE_GRID_WIDTH };
const uint16 SkyAutoRoute::_logicCommands[4] = { RIGHTY, LEFTY, DOWNY, UPY };
SkyAutoRoute::SkyAutoRoute(SkyGrid *pGrid) {
_grid = pGrid;
_routeGrid = (uint16 *)malloc(ROUTE_GRID_SIZE);
_routeBuf = (uint16 *)malloc(ROUTE_SPACE);
}
SkyAutoRoute::~SkyAutoRoute(void) {
free(_routeGrid);
free(_routeBuf);
}
uint16 SkyAutoRoute::checkBlock(uint16 *blockPos) {
uint16 retVal = 0xFFFF;
for (uint8 cnt = 0; cnt < 4; cnt++) {
uint16 fieldVal = *(blockPos + _routeDirections[cnt]);
if (fieldVal && (fieldVal < retVal))
retVal = fieldVal;
}
return retVal;
}
void SkyAutoRoute::clipCoordX(uint16 x, uint8 &blkX, int16 &initX) {
if (x < TOP_LEFT_X) {
blkX = 0;
initX = x - TOP_LEFT_X;
} else if (x >= TOP_LEFT_X + GAME_SCREEN_WIDTH) {
blkX = (GAME_SCREEN_WIDTH - 1) >> 3;
initX = x - (TOP_LEFT_X + GAME_SCREEN_WIDTH);
} else {
blkX = (x - TOP_LEFT_X) >> 3;
initX = 0;
}
}
void SkyAutoRoute::clipCoordY(uint16 y, uint8 &blkY, int16 &initY) {
if (y < TOP_LEFT_Y) {
blkY = 0;
initY = y - TOP_LEFT_Y;
} else if (y >= TOP_LEFT_Y + GAME_SCREEN_HEIGHT) {
blkY = (GAME_SCREEN_HEIGHT - 1) >> 3;
initY = y - (TOP_LEFT_Y + GAME_SCREEN_WIDTH);
} else {
blkY = (y - TOP_LEFT_Y) >> 3;
initY = 0;
}
}
void SkyAutoRoute::initWalkGrid(uint8 screen, uint8 width) {
uint16 *wGridPos;
uint8 stretch = 0;
uint8 *screenGrid = _grid->giveGrid(screen);
screenGrid += GRID_SIZE;
wGridPos = _routeGrid + (ROUTE_GRID_SIZE >> 1) - ROUTE_GRID_WIDTH - 2;
memset(_routeGrid, 0, ROUTE_GRID_SIZE);
uint8 bitsLeft = 0; uint32 gridData = 0;
for (uint8 gridCntY = 0; gridCntY < ROUTE_GRID_HEIGHT - 2; gridCntY++) {
for (uint8 gridCntX = 0; gridCntX < ROUTE_GRID_WIDTH - 2; gridCntX++) {
if (!bitsLeft) {
screenGrid -= 4;
gridData = READ_LE_UINT32(screenGrid);
bitsLeft = 32;
}
if (gridData & 1) {
*wGridPos = 0xFFFF; // block is not accessible
stretch = width;
} else if (stretch) {
*wGridPos = 0xFFFF;
stretch--;
}
wGridPos--;
bitsLeft--;
gridData >>= 1;
}
wGridPos -= 2;
stretch = 0;
}
}
bool SkyAutoRoute::calcWalkGrid(uint8 startX, uint8 startY, uint8 destX, uint8 destY) {
int16 directionX, directionY;
uint8 roiX, roiY; // Rectangle Of Interest in the walk grid
if (startY > destY) {
directionY = -ROUTE_GRID_WIDTH;
roiY = startY;
} else {
directionY = ROUTE_GRID_WIDTH;
roiY = (ROUTE_GRID_HEIGHT-1) - startY;
}
if (startX > destX) {
directionX = -1;
roiX = startX + 2;
} else {
directionX = 1;
roiX = (ROUTE_GRID_WIDTH - 1) - startX;
}
uint16 *walkDest = _routeGrid + (destY + 1) * ROUTE_GRID_WIDTH + destX + 1;
uint16 *walkStart = _routeGrid + (startY + 1) * ROUTE_GRID_WIDTH + startX + 1;
*walkStart = 1;
// if we are on the edge, move diagonally from start
if (roiY < ROUTE_GRID_HEIGHT-3)
walkStart -= directionY;
if (roiX < ROUTE_GRID_WIDTH-2)
walkStart -= directionX;
bool gridChanged = true;
bool foundRoute = false;
while ((!foundRoute) && gridChanged) {
gridChanged = false;
uint16 *yWalkCalc = walkStart;
for (uint8 cnty = 0; cnty < roiY; cnty++) {
uint16 *xWalkCalc = yWalkCalc;
for (uint8 cntx = 0; cntx < roiX; cntx++) {
if (!*xWalkCalc) { // block wasn't done, yet
uint16 blockRet = checkBlock(xWalkCalc);
if (blockRet < 0xFFFF) {
*xWalkCalc = blockRet + 1;
gridChanged = true;
}
}
xWalkCalc += directionX;
}
yWalkCalc += directionY;
}
if (*walkDest) { // okay, finished
foundRoute = true;
} else { // we couldn't find the route, let's extend the ROI
if (roiY < ROUTE_GRID_HEIGHT - 4) {
walkStart -= directionY;
roiY++;
}
if (roiX < ROUTE_GRID_WIDTH - 4) {
walkStart -= directionX;
roiX++;
}
}
}
return foundRoute;
}
uint16 *SkyAutoRoute::makeRouteData(uint8 startX, uint8 startY, uint8 destX, uint8 destY) {
memset(_routeBuf, 0, ROUTE_SPACE);
uint16 *routePos = _routeGrid + (destY + 1) * ROUTE_GRID_WIDTH + destX + 1;
uint16 *dataTrg = _routeBuf + (ROUTE_SPACE >> 1) - 2;
uint16 lastVal = (*routePos) - 1;
while (lastVal) { // lastVal == 0 means route is done.
dataTrg -= 2;
int16 walkDirection = 0;
for (uint8 cnt = 0; cnt < 4; cnt++)
if (lastVal == *(routePos + _routeDirections[cnt])) {
*(dataTrg + 1) = _logicCommands[cnt];
walkDirection = _routeDirections[cnt];
break;
}
if (!walkDirection)
error("makeRouteData:: can't find way through walkGrid (pos %d)", lastVal);
while (lastVal && (lastVal == *(routePos + walkDirection))) {
*dataTrg += WALK_JUMP;
lastVal--;
routePos += walkDirection;
}
}
return dataTrg;
}
uint16 *SkyAutoRoute::checkInitMove(uint16 *data, int16 initStaX) {
if (initStaX < 0) {
data -= 2;
*(data + 1) = RIGHTY;
*data = ((-initStaX) + 7) & 0xFFF8;
} else if (initStaX > 0) {
data -= 2;
*(data + 1) = LEFTY;
*data = (initStaX + 7) & 0xFFF8;
}
return data;
}
uint16 SkyAutoRoute::autoRoute(Compact *cpt) {
uint8 cptScreen = (uint8)cpt->screen;
uint8 cptWidth = (uint8)SkyCompact::getMegaSet(cpt, cpt->extCompact->megaSet)->gridWidth;
initWalkGrid(cptScreen, cptWidth);
uint8 startX, startY, destX, destY;
int16 initStaX, initStaY, initDestX, initDestY;
clipCoordX(cpt->xcood, startX, initStaX);
clipCoordY(cpt->ycood, startY, initStaY);
clipCoordX(cpt->extCompact->arTargetX, destX, initDestX);
clipCoordY(cpt->extCompact->arTargetY, destY, initDestY);
memset(cpt->extCompact->animScratch, 0, 64);
if ((startX == destX) && (startY == destY))
return 2;
if (_routeGrid[(destY + 1) * ROUTE_GRID_WIDTH + destX + 1])
return 1; // AR destination is an unaccessible block
if (!calcWalkGrid(startX, startY, destX, destY))
return 1; // can't find route to block
uint16 *routeData = makeRouteData(startX, startY, destX, destY);
// the route is done.
// if there was an initial x movement (due to clipping) tag it onto the start
routeData = checkInitMove(routeData, initStaX);
uint8 cnt = 0;
do {
((uint16*)cpt->extCompact->animScratch)[cnt] = routeData[cnt];
((uint16*)cpt->extCompact->animScratch)[cnt + 1] = routeData[cnt + 1];
cnt += 2;
} while (routeData[cnt - 2]);
return 0;
}
|
