4 // Copyright (C) 2007 Christoph Sommer <christoph.sommer@2007.expires.deltadevelopment.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include "object_factory.hpp"
28 #include "object/tilemap.hpp"
29 #include "lisp/writer.hpp"
30 #include "sprite/sprite.hpp"
32 Ispy::Ispy(const lisp::Lisp& reader)
33 : MovingSprite(reader, "images/objects/ispy/ispy.sprite", LAYER_TILES+5, COLGROUP_DISABLED), state(ISPYSTATE_IDLE), dir(AUTO)
35 // read script to execute
36 reader.get("script", script);
38 // read direction to face in
40 bool facing_down = false;
41 reader.get("direction", dir_str);
42 if( dir_str == "left" ) dir = LEFT;
43 if( dir_str == "right" ) dir = RIGHT;
44 reader.get("facing-down", facing_down);
45 if (facing_down) dir = DOWN;
46 if (dir == AUTO) log_warning << "Setting an Ispy's direction to AUTO is no good idea" << std::endl;
48 // set initial sprite action
49 sprite->set_action((dir == DOWN) ? "idle-down" : ((dir == LEFT) ? "idle-left" : "idle-right"));
53 Ispy::write(lisp::Writer& writer)
55 writer.start_list("ispy");
56 writer.write("x", bbox.p1.x);
57 writer.write("y", bbox.p1.y);
58 writer.write("script", script);
62 writer.write("direction", "down"); break;
64 writer.write("direction", "left"); break;
66 writer.write("direction", "right"); break;
69 writer.end_list("ispy");
73 Ispy::collision(GameObject& , const CollisionHit& )
79 Ispy::line_intersects_line(Vector line1_start, Vector line1_end, Vector line2_start, Vector line2_end) {
80 // Adapted from Striker, (C) 1999 Joris van der Hoeven, GPL
82 float a1 = line1_start.x, b1 = line1_start.y, a2 = line1_end.x, b2 = line1_end.y;
83 float c1 = line2_start.x, d1 = line2_start.y, c2 = line2_end.x, d2 = line2_end.y;
85 float num = (b2-b1)*(c2-c1) - (a2-a1)*(d2-d1);
86 float den1 = (d2-b2)*(c1-c2) + (a2-c2)*(d1-d2);
87 float den2 = (d2-b2)*(a1-a2) + (a2-c2)*(b1-b2);
89 // normalize to positive numerator
96 // numerator is zero -> Check for parallel or coinciding lines
98 if ((b1-b2)*(c1-a2) != (a1-a2)*(d1-b2)) return false;
105 if (a1 > a2) std::swap(a1, a2);
106 if (c1 > c2) std::swap(c1, c2);
107 return ((a1 <= c2) && (a2 >= c1));
111 return (den1>=0) && (den1<=num) && (den2>=0) && (den2<=num);
116 Ispy::intersects_line(Rect r, Vector line_start, Vector line_end)
119 Vector p2 = Vector(r.p2.x, r.p1.y);
121 Vector p4 = Vector(r.p1.x, r.p2.y);
122 if (line_intersects_line(p1, p2, line_start, line_end)) return true;
123 if (line_intersects_line(p2, p3, line_start, line_end)) return true;
124 if (line_intersects_line(p3, p4, line_start, line_end)) return true;
125 if (line_intersects_line(p4, p1, line_start, line_end)) return true;
130 Ispy::free_line_of_sight(Vector line_start, Vector line_end, const MovingObject* ignore_object)
133 // check if no tile is in the way
134 float lsx = std::min(line_start.x, line_end.x);
135 float lex = std::max(line_start.x, line_end.x);
136 float lsy = std::min(line_start.y, line_end.y);
137 float ley = std::max(line_start.y, line_end.y);
138 std::list<TileMap*> solid_tilemaps = Sector::current()->solid_tilemaps;
139 for (float test_x = lsx; test_x <= lex; test_x += 16) {
140 for (float test_y = lsy; test_y <= ley; test_y += 16) {
141 for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
142 TileMap* solids = *i;
143 const Tile* tile = solids->get_tile_at(Vector(test_x, test_y));
145 // FIXME: check collision with slope tiles
146 if((tile->getAttributes() & Tile::SOLID)) return false;
151 // check if no object is in the way
152 using namespace collision;
153 Sector::MovingObjects& moving_objects = Sector::current()->moving_objects;
154 for(Sector::MovingObjects::const_iterator i = moving_objects.begin();
155 i != moving_objects.end(); ++i) {
156 const MovingObject* moving_object = *i;
157 if (moving_object == ignore_object) continue;
158 if (!moving_object->is_valid()) continue;
159 if ((moving_object->get_group() == COLGROUP_MOVING)
160 || (moving_object->get_group() == COLGROUP_MOVING_STATIC)
161 || (moving_object->get_group() == COLGROUP_STATIC)) {
162 if(intersects_line(moving_object->get_bbox(), line_start, line_end)) return false;
173 if (state == ISPYSTATE_IDLE) {
174 // check if a player has been spotted
175 bool playerSpotted = false;
176 std::vector<Player*> players = Sector::current()->get_players();
177 for (std::vector<Player*>::iterator playerIter = players.begin(); playerIter != players.end(); ++playerIter) {
178 Player* player = *playerIter;
180 Vector eye = get_bbox().get_middle();
181 if (dir == LEFT) eye = Vector(get_bbox().p1.x, get_bbox().get_middle().y);
182 if (dir == RIGHT) eye = Vector(get_bbox().p2.x, get_bbox().get_middle().y);
183 if (dir == UP) eye = Vector(get_bbox().get_middle().x, get_bbox().p1.y);
184 if (dir == DOWN) eye = Vector(get_bbox().get_middle().x, get_bbox().p2.y);
186 // test for free line of sight to any of all four corners and the middle of a player's bounding box
187 if (free_line_of_sight(eye, player->get_bbox().p1, player)) playerSpotted = true;
188 if (free_line_of_sight(eye, Vector(player->get_bbox().p2.x, player->get_bbox().p1.y), player)) playerSpotted = true;
189 if (free_line_of_sight(eye, player->get_bbox().p2, player)) playerSpotted = true;
190 if (free_line_of_sight(eye, Vector(player->get_bbox().p1.x, player->get_bbox().p2.y), player)) playerSpotted = true;
191 if (free_line_of_sight(eye, player->get_bbox().get_middle(), player)) playerSpotted = true;
195 sprite->set_action((dir == DOWN) ? "alert-down" : ((dir == LEFT) ? "alert-left" : "alert-right"), 1);
196 state = ISPYSTATE_ALERT;
198 std::istringstream stream(script);
199 Sector::current()->run_script(stream, "Ispy");
202 if (state == ISPYSTATE_ALERT) {
203 if (sprite->animation_done()) {
204 sprite->set_action((dir == DOWN) ? "hiding-down" : ((dir == LEFT) ? "hiding-left" : "hiding-right"), 1);
205 state = ISPYSTATE_HIDING;
208 if (state == ISPYSTATE_HIDING) {
209 if (sprite->animation_done()) {
210 sprite->set_action((dir == DOWN) ? "showing-down" : ((dir == LEFT) ? "showing-left" : "showing-right"), 1);
211 state = ISPYSTATE_SHOWING;
214 if (state == ISPYSTATE_SHOWING) {
215 if (sprite->animation_done()) {
216 sprite->set_action((dir == DOWN) ? "idle-down" : ((dir == LEFT) ? "idle-left" : "idle-right"));
217 state = ISPYSTATE_IDLE;
222 IMPLEMENT_FACTORY(Ispy, "ispy");