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) :
57 if (!(lisp.get("x", position.x)&&lisp.get("y", position.y))) {
58 log_warning << "No Position in ambient_sound" << std::endl;
61 lisp.get("name" , name);
62 lisp.get("width" , dimension.x);
63 lisp.get("height", dimension.y);
65 lisp.get("distance_factor",distance_factor);
66 lisp.get("distance_bias" ,distance_bias );
67 lisp.get("sample" ,sample );
68 lisp.get("volume" ,maximumvolume );
70 // set dimension to zero if smaller than 64, which is default size in flexlay
72 if ((dimension.x <= 64) || (dimension.y <= 64)) {
77 // square all distances (saves us a sqrt later)
79 distance_bias*=distance_bias;
80 distance_factor*=distance_factor;
82 // set default silence_distance
84 if (distance_factor == 0)
85 silence_distance = std::numeric_limits<float>::max();
87 silence_distance = 1/distance_factor;
89 lisp.get("silence_distance",silence_distance);
91 sound_source.reset(); // not playing at the beginning
92 SoundManager::current()->preload(sample);
96 AmbientSound::AmbientSound(Vector pos, float factor, float bias, float vol, std::string file) :
117 distance_factor=factor*factor;
118 distance_bias=bias*bias;
122 // set default silence_distance
124 if (distance_factor == 0)
125 silence_distance = std::numeric_limits<float>::max();
127 silence_distance = 1/distance_factor;
129 sound_source = 0; // not playing at the beginning
130 SoundManager::current()->preload(sample);
134 AmbientSound::~AmbientSound()
140 AmbientSound::hit(Player& )
145 AmbientSound::stop_playing()
147 sound_source.reset();
151 AmbientSound::start_playing()
154 sound_source = SoundManager::current()->create_sound_source(sample);
156 throw std::runtime_error("file not found");
158 sound_source->set_gain(0);
159 sound_source->set_looping(true);
160 currentvolume=targetvolume=1e-20f;
161 sound_source->play();
162 } catch(std::exception& e) {
163 log_warning << "Couldn't play '" << sample << "': " << e.what() << "" << std::endl;
164 sound_source.reset();
170 AmbientSound::update(float deltat)
172 if (latency-- <= 0) {
176 if (!Sector::current() || !Sector::current()->camera) return;
178 px=Sector::current()->camera->get_center().x;
179 py=Sector::current()->camera->get_center().y;
181 // Relate to which point in the area
182 rx=px<position.x?position.x:
183 (px<position.x+dimension.x?px:position.x+dimension.x);
184 ry=py<position.y?position.y:
185 (py<position.y+dimension.y?py:position.y+dimension.y);
187 // calculate square of distance
188 float sqrdistance=(px-rx)*(px-rx)+(py-ry)*(py-ry);
189 sqrdistance-=distance_bias;
191 // inside the bias: full volume (distance 0)
195 // calculate target volume - will never become 0
196 targetvolume=1/(1+sqrdistance*distance_factor);
197 float rise=targetvolume/currentvolume;
199 // rise/fall half life?
200 currentvolume*=pow(rise,deltat*10);
201 currentvolume += 1e-6f; // volume is at least 1e-6 (0 would never rise)
203 if (sound_source != 0) {
206 sound_source->set_gain(currentvolume*maximumvolume);
208 if (sqrdistance>=silence_distance && currentvolume<1e-3)
212 if (sqrdistance<silence_distance) {
216 else // set a reasonable latency
217 latency=(int)(0.001/distance_factor);
218 //(int)(10*((sqrdistance-silence_distance)/silence_distance));
222 // heuristically measured "good" latency maximum
224 // if (latency>0.001/distance_factor)
229 AmbientSound::draw(DrawingContext &)
234 AmbientSound::expose(HSQUIRRELVM vm, SQInteger table_idx)
236 scripting::AmbientSound* _this = static_cast<scripting::AmbientSound*> (this);
237 expose_object(vm, table_idx, _this, name, false);
241 AmbientSound::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
243 scripting::unexpose_object(vm, table_idx, name);
247 AmbientSound::set_pos(float x, float y)
254 AmbientSound::get_pos_x() const
260 AmbientSound::get_pos_y() const