de.gurkenlabs.litiengine.sound.SFXPlayback Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of litiengine Show documentation
The FOSS 2D Java game engine.
The newest version!
package de.gurkenlabs.litiengine.sound;

import de.gurkenlabs.litiengine.Game;
import java.awt.geom.Point2D;
import java.util.function.Supplier;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;

/** A {@code SoundPlayback} implementation for the playback of sound effects. */
public class SFXPlayback extends SoundPlayback {
  private final Sound sound;
  private final FloatControl panControl;
  private final Supplier source;
  private final int range;
  private final float volumeModifier;
  private final VolumeControl volume;
  private final boolean loop;

  SFXPlayback(Sound sound, Supplier source, boolean loop, int range, float volumeModifier)
      throws LineUnavailableException {
    super(sound.getFormat());
    this.loop = loop;
    this.sound = sound;
    this.panControl =
        this.line.isControlSupported(FloatControl.Type.PAN)
            ? (FloatControl) this.line.getControl(FloatControl.Type.PAN)
            : null;
    this.source = source;
    this.range = range;
    this.volumeModifier = volumeModifier;
    this.volume = this.createVolumeControl();
  }

  @Override
  public void run() {
    try {
      do {
        if (this.play(this.sound)) {
          return;
        }
      } while (this.loop);
    } catch (LineUnavailableException e) {
      e.printStackTrace();
    } finally {
      this.finish();
    }
  }

  void updateLocation(Point2D listenerLocation) {
    Point2D location = source.get();
    if (location != null) {
      double dx = location.getX() - listenerLocation.getX();
      double dy = location.getY() - listenerLocation.getY();
      double dist = Math.sqrt(dx * dx + dy * dy);
      if (this.panControl != null) {
        this.panControl.setValue(dist > 0 ? (float) (dx / dist) : 0f);
      }
      this.volume.set(
          Game.config().sound().getSoundVolume()
              * this.volumeModifier
              * (float) Math.max(1.0 - dist / this.range, 0.0));
    } else {
      this.volume.set(Game.config().sound().getSoundVolume() * this.volumeModifier);
    }
  }

  @Override
  protected void play() {
    this.updateLocation(Game.audio().getListenerLocation());
    super.play();
    Game.audio().addSound(this);
  }
}