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3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * Copyright (©) 2001-2003,2007 Mark Wedel & Crossfire Development Team |
5 | * Copyright (©) 2001-2003,2007 Mark Wedel & Crossfire Development Team |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
7 | * |
7 | * |
8 | * Deliantra is free software: you can redistribute it and/or modify |
8 | * Deliantra is free software: you can redistribute it and/or modify it under |
9 | * it under the terms of the GNU General Public License as published by |
9 | * the terms of the Affero GNU General Public License as published by the |
10 | * the Free Software Foundation, either version 3 of the License, or |
10 | * Free Software Foundation, either version 3 of the License, or (at your |
11 | * (at your option) any later version. |
11 | * option) any later version. |
12 | * |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
16 | * GNU General Public License for more details. |
17 | * |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
18 | * You should have received a copy of the Affero GNU General Public License |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | * and the GNU General Public License along with this program. If not, see |
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20 | * <http://www.gnu.org/licenses/>. |
20 | * |
21 | * |
21 | * The authors can be reached via e-mail to <support@deliantra.net> |
22 | * The authors can be reached via e-mail to <support@deliantra.net> |
22 | */ |
23 | */ |
23 | |
24 | |
24 | #include <unistd.h> |
25 | #include <unistd.h> |
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70 | * by the caller. |
71 | * by the caller. |
71 | */ |
72 | */ |
72 | int |
73 | int |
73 | blocked_link (object *ob, maptile *m, int sx, int sy) |
74 | blocked_link (object *ob, maptile *m, int sx, int sy) |
74 | { |
75 | { |
75 | object *tmp; |
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76 | int mflags, blocked; |
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77 | |
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78 | /* Make sure the coordinates are valid - they should be, as caller should |
76 | /* Make sure the coordinates are valid - they should be, as caller should |
79 | * have already checked this. |
77 | * have already checked this. |
80 | */ |
78 | */ |
81 | if (OUT_OF_REAL_MAP (m, sx, sy)) |
79 | if (OUT_OF_REAL_MAP (m, sx, sy)) |
82 | { |
80 | { |
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85 | } |
83 | } |
86 | |
84 | |
87 | /* Save some cycles - instead of calling get_map_flags(), just get the value |
85 | /* Save some cycles - instead of calling get_map_flags(), just get the value |
88 | * directly. |
86 | * directly. |
89 | */ |
87 | */ |
90 | mflags = m->at (sx, sy).flags (); |
88 | mapspace &ms = m->at (sx, sy); |
91 | |
89 | |
92 | blocked = GET_MAP_MOVE_BLOCK (m, sx, sy); |
90 | int mflags = ms.flags (); |
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91 | int blocked = ms.move_block; |
93 | |
92 | |
94 | /* If space is currently not blocked by anything, no need to |
93 | /* If space is currently not blocked by anything, no need to |
95 | * go further. Not true for players - all sorts of special |
94 | * go further. Not true for players - all sorts of special |
96 | * things we need to do for players. |
95 | * things we need to do for players. |
97 | */ |
96 | */ |
98 | if (ob->type != PLAYER && !(mflags & P_IS_ALIVE) && (blocked == 0)) |
97 | if (ob->type != PLAYER && !(mflags & P_IS_ALIVE) && (blocked == 0)) |
99 | return 0; |
98 | return 0; |
100 | |
99 | |
101 | /* if there isn't anytyhing alive on this space, and this space isn't |
100 | /* if there isn't anything alive on this space, and this space isn't |
102 | * otherwise blocked, we can return now. Only if there is a living |
101 | * otherwise blocked, we can return now. Only if there is a living |
103 | * creature do we need to investigate if it is part of this creature |
102 | * creature do we need to investigate if it is part of this creature |
104 | * or another. Likewise, only if something is blocking us do we |
103 | * or another. Likewise, only if something is blocking us do we |
105 | * need to investigate if there is a special circumstance that would |
104 | * need to investigate if there is a special circumstance that would |
106 | * let the player through (inventory checkers for example) |
105 | * let the player through (inventory checkers for example) |
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113 | /* We basically go through the stack of objects, and if there is |
112 | /* We basically go through the stack of objects, and if there is |
114 | * some other object that has NO_PASS or FLAG_ALIVE set, return |
113 | * some other object that has NO_PASS or FLAG_ALIVE set, return |
115 | * true. If we get through the entire stack, that must mean |
114 | * true. If we get through the entire stack, that must mean |
116 | * ob is blocking it, so return 0. |
115 | * ob is blocking it, so return 0. |
117 | */ |
116 | */ |
118 | for (tmp = GET_MAP_OB (m, sx, sy); tmp; tmp = tmp->above) |
117 | for (object *tmp = ms.bot; tmp; tmp = tmp->above) |
119 | { |
118 | { |
120 | |
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121 | /* This must be before the checks below. Code for inventory checkers. */ |
119 | /* This must be before the checks below. Code for inventory checkers. */ |
122 | if (tmp->type == CHECK_INV && OB_MOVE_BLOCK (ob, tmp)) |
120 | if (tmp->type == CHECK_INV && OB_MOVE_BLOCK (ob, tmp)) |
123 | { |
121 | { |
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122 | bool have = check_inv_recursive (ob, tmp); |
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123 | |
124 | /* If last_sp is set, the player/monster needs an object, |
124 | /* If last_sp is set, the player/monster needs an object, |
125 | * so we check for it. If they don't have it, they can't |
125 | * so we check for it. If they don't have it, they can't |
126 | * pass through this space. |
126 | * pass through this space. |
127 | */ |
127 | */ |
128 | if (tmp->last_sp) |
128 | if (tmp->last_sp) |
129 | { |
129 | { |
130 | if (check_inv_recursive (ob, tmp) == NULL) |
130 | if (!have) |
131 | return 1; |
131 | return 1; |
132 | else |
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133 | continue; |
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134 | } |
132 | } |
135 | else |
133 | else |
136 | { |
134 | { |
137 | /* In this case, the player must not have the object - |
135 | /* In this case, the player must not have the object - |
138 | * if they do, they can't pass through. |
136 | * if they do, they can't pass through. |
139 | */ |
137 | */ |
140 | if (check_inv_recursive (ob, tmp) != NULL) /* player has object */ |
138 | if (have) |
141 | return 1; |
139 | return 1; |
142 | else |
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143 | continue; |
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144 | } |
140 | } |
145 | } /* if check_inv */ |
141 | } |
146 | else |
142 | else |
147 | { |
143 | { |
148 | /* Broke apart a big nasty if into several here to make |
144 | /* Broke apart a big nasty if into several here to make |
149 | * this more readable. first check - if the space blocks |
145 | * this more readable. first check - if the space blocks |
150 | * movement, can't move here. |
146 | * movement, can't move here. |
151 | * second - if a monster, can't move there, unless it is a |
147 | * second - if a monster, can't move there, unless it is a |
152 | * hidden dm |
148 | * dm. |
153 | */ |
149 | */ |
154 | if (OB_MOVE_BLOCK (ob, tmp)) |
150 | if (OB_MOVE_BLOCK (ob, tmp)) |
155 | return 1; |
151 | return 1; |
156 | |
152 | |
157 | if (tmp->flag [FLAG_ALIVE] |
153 | if (tmp->flag [FLAG_ALIVE] |
158 | && tmp->head_ () != ob |
154 | && tmp->head_ () != ob |
159 | && tmp != ob |
155 | && tmp != ob |
160 | && tmp->type != DOOR |
156 | && tmp->type != DOOR |
161 | && !(tmp->flag [FLAG_WIZ] && tmp->contr->hidden)) |
157 | && !tmp->flag [FLAG_WIZ]) |
162 | return 1; |
158 | return 1; |
163 | } |
159 | } |
164 | |
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165 | } |
160 | } |
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161 | |
166 | return 0; |
162 | return 0; |
167 | } |
163 | } |
168 | |
164 | |
169 | /* |
165 | /* |
170 | * Returns qthe blocking object if the given object can't fit in the given |
166 | * Returns qthe blocking object if the given object can't fit in the given |