2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "audio/sound_manager.hpp"
21 #include "audio/sound_source.hpp"
22 #include "object/ambient_sound.hpp"
23 #include "object/camera.hpp"
24 #include "scripting/squirrel_util.hpp"
25 #include "supertux/object_factory.hpp"
26 #include "supertux/sector.hpp"
27 #include "util/reader.hpp"
29 AmbientSound::AmbientSound(const Reader& lisp) :
54 if (!(lisp.get("x", position.x)&&lisp.get("y", position.y))) {
55 log_warning << "No Position in ambient_sound" << std::endl;
58 lisp.get("name" , name);
59 lisp.get("width" , dimension.x);
60 lisp.get("height", dimension.y);
62 lisp.get("distance_factor",distance_factor);
63 lisp.get("distance_bias" ,distance_bias );
64 lisp.get("sample" ,sample );
65 lisp.get("volume" ,maximumvolume );
67 // set dimension to zero if smaller than 64, which is default size in flexlay
69 if ((dimension.x <= 64) || (dimension.y <= 64)) {
74 // square all distances (saves us a sqrt later)
76 distance_bias*=distance_bias;
77 distance_factor*=distance_factor;
79 // set default silence_distance
81 if (distance_factor == 0)
82 silence_distance = std::numeric_limits<float>::max();
84 silence_distance = 1/distance_factor;
86 lisp.get("silence_distance",silence_distance);
88 sound_source.reset(); // not playing at the beginning
89 SoundManager::current()->preload(sample);
93 AmbientSound::AmbientSound(Vector pos, float factor, float bias, float vol, std::string file) :
113 distance_factor=factor*factor;
114 distance_bias=bias*bias;
117 // set default silence_distance
119 if (distance_factor == 0)
120 silence_distance = std::numeric_limits<float>::max();
122 silence_distance = 1/distance_factor;
124 sound_source = 0; // not playing at the beginning
125 SoundManager::current()->preload(sample);
129 AmbientSound::~AmbientSound()
135 AmbientSound::hit(Player& )
140 AmbientSound::stop_playing()
142 sound_source.reset();
146 AmbientSound::start_playing()
149 sound_source = SoundManager::current()->create_sound_source(sample);
151 throw std::runtime_error("file not found");
153 sound_source->set_gain(0);
154 sound_source->set_looping(true);
155 currentvolume=targetvolume=1e-20f;
156 sound_source->play();
157 } catch(std::exception& e) {
158 log_warning << "Couldn't play '" << sample << "': " << e.what() << "" << std::endl;
159 sound_source.reset();
165 AmbientSound::update(float deltat)
167 if (latency-- <= 0) {
171 if (!Sector::current() || !Sector::current()->camera) return;
173 px=Sector::current()->camera->get_center().x;
174 py=Sector::current()->camera->get_center().y;
176 // Relate to which point in the area
177 rx=px<position.x?position.x:
178 (px<position.x+dimension.x?px:position.x+dimension.x);
179 ry=py<position.y?position.y:
180 (py<position.y+dimension.y?py:position.y+dimension.y);
182 // calculate square of distance
183 float sqrdistance=(px-rx)*(px-rx)+(py-ry)*(py-ry);
184 sqrdistance-=distance_bias;
186 // inside the bias: full volume (distance 0)
190 // calculate target volume - will never become 0
191 targetvolume=1/(1+sqrdistance*distance_factor);
192 float rise=targetvolume/currentvolume;
194 // rise/fall half life?
195 currentvolume*=pow(rise,deltat*10);
196 currentvolume += 1e-6f; // volume is at least 1e-6 (0 would never rise)
198 if (sound_source != 0) {
201 sound_source->set_gain(currentvolume*maximumvolume);
203 if (sqrdistance>=silence_distance && currentvolume<1e-3)
207 if (sqrdistance<silence_distance) {
211 else // set a reasonable latency
212 latency=(int)(0.001/distance_factor);
213 //(int)(10*((sqrdistance-silence_distance)/silence_distance));
217 // heuristically measured "good" latency maximum
219 // if (latency>0.001/distance_factor)
224 AmbientSound::draw(DrawingContext &)
229 AmbientSound::expose(HSQUIRRELVM vm, SQInteger table_idx)
231 scripting::AmbientSound* _this = static_cast<scripting::AmbientSound*> (this);
232 expose_object(vm, table_idx, _this, name, false);
236 AmbientSound::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
238 scripting::unexpose_object(vm, table_idx, name);
242 AmbientSound::set_pos(float x, float y)
249 AmbientSound::get_pos_x() const
255 AmbientSound::get_pos_y() const