Open source Star Ruler 2 source code!

2018-07-17 14:15:37 +02:00
commit cc307720ff
4342 changed files with 2365070 additions and 0 deletions
@@ -0,0 +1,135 @@
+const double DROPOFF_FACTOR = 64.0;
+const double DROPOFF_FACTOR_SQ = DROPOFF_FACTOR * DROPOFF_FACTOR;
+
+final class SoundEntry {
+	vec3d pos;
+	double scale;
+};
+
+final class AmbienceGroup {
+	map entries;
+	SoundEntry@ active;
+	const SoundSource@ source;
+	Sound@ sound;
+	double volume = 0;
+	
+	AmbienceGroup(const SoundSource& soundSource) {
+		@source = soundSource;
+	}
+	
+	void addEntry(int id, const vec3d& pos, double scale) {
+		SoundEntry entry;
+		entry.pos = pos;
+		entry.scale = scale;
+		entries.set(id, @entry);
+	}
+	
+	void deleteEntry(int id) {
+		entries.delete(id);
+	}
+	
+	SoundEntry@ findNearest(const vec3d& to) {
+		SoundEntry@ nearest;
+		double nearDist = 0;
+	
+		map_iterator i = entries.iterator();
+		SoundEntry@ entry;
+		while(i.iterate(@entry)) {
+			double d = to.distanceToSQ(entry.pos);
+			if(d < entry.scale * entry.scale * DROPOFF_FACTOR_SQ && (nearest is null || d < nearDist)) {
+				@nearest = entry;
+				nearDist = d;
+			}
+		}
+		
+		return nearest;
+	}
+	
+	void tick(double time, const vec3d& pos) {
+		auto@ entry = findNearest(pos);
+		if(entry !is active) {
+			if(active !is null && sound !is null) {
+				if(volume > 0) {
+					volume = max(volume - time, 0.0);
+					sound.volume = volume * sqrt(active.scale);
+				}
+				else {
+					sound.pause();
+					@active = null;
+				}
+			}
+			else {
+				@active = entry;
+			}
+		}
+		else if(active !is null) {
+			if(sound is null) {
+				@sound = source.play(entry.pos, loop=true, pause=true, priority=true);
+				if(sound !is null) {
+					sound.minDistance = entry.scale;
+					sound.maxDistance = entry.scale * DROPOFF_FACTOR;
+					sound.volume = 0;
+					sound.resume();
+					volume = 0;
+				}
+			}
+			else if(volume < 1.0) {
+				if(volume == 0.0) {
+					sound.position = entry.pos;
+					sound.minDistance = entry.scale;
+					sound.maxDistance = entry.scale * DROPOFF_FACTOR;
+					sound.resume();
+				}
+				volume = min(1.0, volume+time);
+				sound.volume = volume * sqrt(entry.scale);
+			}
+		}
+	}
+	
+	void clear() {
+		if(sound !is null)
+			sound.stop();
+		entries.deleteAll();
+	}
+};
+
+Mutex mtx;
+dictionary ambientSounds;
+
+void addAmbientSource(string sound, int id, vec3d pos, double scale) {
+	Lock lck(mtx);
+	AmbienceGroup@ group;
+	if(!ambientSounds.get(sound, @group)) {
+		const auto@ source = getSound(sound);
+		if(source is null)
+			return;
+		@group = AmbienceGroup(source);
+		ambientSounds.set(sound, @group);
+	}
+	
+	group.addEntry(id, pos, scale);
+}
+
+void removeAmbientSource(int id) {
+	Lock lck(mtx);
+	AmbienceGroup@ group;
+	dictionary_iterator i = ambientSounds.iterator();
+	while(i.iterate(@group))
+		group.deleteEntry(id);
+}
+
+void tick(double time) {
+	Lock lck(mtx);
+	AmbienceGroup@ group;
+	dictionary_iterator i = ambientSounds.iterator();
+	while(i.iterate(@group))
+		group.tick(time, cameraPos);
+}
+
+void deinit() {
+	Lock lck(mtx);
+	AmbienceGroup@ group;
+	dictionary_iterator i = ambientSounds.iterator();
+	while(i.iterate(@group))
+		group.clear();
+}