4 // Copyright (C) 2006 Matthias Braun <matze@braunis.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.
26 #include "ambient_sound.hpp"
27 #include "object_factory.hpp"
28 #include "lisp/lisp.hpp"
30 #include "audio/sound_manager.hpp"
31 #include "audio/sound_source.hpp"
33 #include "scripting/squirrel_util.hpp"
35 AmbientSound::AmbientSound(const lisp::Lisp& lisp)
50 if (!(lisp.get("x", position.x)&&lisp.get("y", position.y))) {
51 log_warning << "No Position in ambient_sound" << std::endl;
54 lisp.get("name" , name);
55 lisp.get("width" , dimension.x);
56 lisp.get("height", dimension.y);
58 lisp.get("distance_factor",distance_factor);
59 lisp.get("distance_bias" ,distance_bias );
60 lisp.get("sample" ,sample );
61 lisp.get("volume" ,maximumvolume );
63 // set dimension to zero if smaller than 64, which is default size in flexlay
65 if ((dimension.x <= 64) || (dimension.y <= 64)) {
70 // square all distances (saves us a sqrt later)
72 distance_bias*=distance_bias;
73 distance_factor*=distance_factor;
75 // set default silence_distance
77 if (distance_factor == 0)
78 silence_distance = 10e99;
80 silence_distance = 1/distance_factor;
82 lisp.get("silence_distance",silence_distance);
84 sound_source = 0; // not playing at the beginning
88 AmbientSound::AmbientSound(Vector pos, float factor, float bias, float vol, std::string file)
96 distance_factor=factor*factor;
97 distance_bias=bias*bias;
101 // set default silence_distance
103 if (distance_factor == 0)
104 silence_distance = 10e99;
106 silence_distance = 1/distance_factor;
108 sound_source = 0; // not playing at the beginning
112 AmbientSound::~AmbientSound() {
117 AmbientSound::hit(Player& )
122 AmbientSound::stop_playing() {
128 AmbientSound::start_playing()
131 sound_source = sound_manager->create_sound_source(sample);
133 throw std::runtime_error("file not found");
135 sound_source->set_gain(0);
136 sound_source->set_looping(true);
137 currentvolume=targetvolume=1e-20;
138 sound_source->play();
139 } catch(std::exception& e) {
140 log_warning << "Couldn't play '" << sample << "': " << e.what() << "" << std::endl;
148 AmbientSound::update(float deltat)
150 if (latency-- <= 0) {
155 px=Sector::current()->player->get_pos().x;
156 py=Sector::current()->player->get_pos().y;
158 // Relate to which point in the area
159 rx=px<position.x?position.x:
160 (px<position.x+dimension.x?px:position.x+dimension.x);
161 ry=py<position.y?position.y:
162 (py<position.y+dimension.y?py:position.y+dimension.y);
164 // calculate square of distance
165 float sqrdistance=(px-rx)*(px-rx)+(py-ry)*(py-ry);
166 sqrdistance-=distance_bias;
168 // inside the bias: full volume (distance 0)
172 // calculate target volume - will never become 0
173 targetvolume=1/(1+sqrdistance*distance_factor);
174 float rise=targetvolume/currentvolume;
176 // rise/fall half life?
177 currentvolume*=pow(rise,deltat*10);
178 currentvolume += 1e-6; // volume is at least 1e-6 (0 would never rise)
180 if (sound_source != 0) {
183 sound_source->set_gain(currentvolume*maximumvolume);
185 if (sqrdistance>=silence_distance && currentvolume<1e-3)
189 if (sqrdistance<silence_distance) {
193 else // set a reasonable latency
194 latency=(int)(0.001/distance_factor);
195 //(int)(10*((sqrdistance-silence_distance)/silence_distance));
199 // heuristically measured "good" latency maximum
201 // if (latency>0.001/distance_factor)
206 AmbientSound::draw(DrawingContext &)
211 AmbientSound::expose(HSQUIRRELVM vm, SQInteger table_idx)
213 Scripting::AmbientSound* interface = static_cast<Scripting::AmbientSound*> (this);
214 expose_object(vm, table_idx, interface, name, false);
218 AmbientSound::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
220 Scripting::unexpose_object(vm, table_idx, name);
224 AmbientSound::set_pos(float x, float y)
231 AmbientSound::get_pos_x() const
237 AmbientSound::get_pos_y() const
242 IMPLEMENT_FACTORY(AmbientSound, "ambient_sound");