/// <summary>
/// (Private) Private method handling low-level OpenAL calls required to play a sound, used by PlaySound() and PlayLoopingSound().
/// </summary>
/// <param name="channel">The sound channel in which to play the sound</param>
/// <param name="file">The sound file, as it appears in the file sourced used by FileSystem</param>
/// <param name="volume">Volume at which the sound should be played, 1.0 means normal, 0.5 means half volume, 2.0 means twice as loud</param>
/// <param name="pitch">Pitch at which the sound should be played. 1.0 means normal, 0.5 means 2x slower, 2.0 means 2x faster.</param>
/// <param name="looping">Should the sound be looping?</param>
/// <returns>True if everything went well, false otherwise</returns>
private bool PlaySoundInChannel(int channel, string file, float volume, float pitch, bool looping)
{
if (!Enabled)
{
return(false);
}
if ((channel < 0) || (channel >= TOTAL_CHANNELS))
{
return(false); // Channel index is out of bounds
}
if (!PrecacheSound(file))
{
return(false); // Failed to precache the sound (wrong data or file do not exist)
}
AudioPlayerSound sound = SoundCache[file];
StopSound(channel);
SoundChannels[channel] = AL.GenSource();
AL.Source(SoundChannels[channel], ALSourcef.Gain, OneBitOfTools.Clamp(volume, 0f, 10f));
AL.Source(SoundChannels[channel], ALSourcef.Pitch, OneBitOfTools.Clamp(pitch, 0.01f, 10f));
AL.Source(SoundChannels[channel], ALSourcei.Buffer, sound.Buffer);
AL.Source(SoundChannels[channel], ALSourceb.Looping, looping);
AL.SourcePlay(SoundChannels[channel]);
return(true);
}
/// <summary>
/// Returns a copy of this position with X and Y coordinates clamped to the bounds of an area.
/// </summary>
/// <param name="area">The area in which the position must be contained</param>
/// <returns>A copy of this position with X and Y coordinates clamped to the bounds of an area</returns>
public Position Bound(Area area)
{
return(new Position(
OneBitOfTools.Clamp(X, area.Left, area.Right - 1),
OneBitOfTools.Clamp(Y, area.Top, area.Bottom - 1)));
}
/// <summary>
/// (Private) Makes sure an integer value is in the 0-255 range.
/// </summary>
/// <param name="value">An integer value</param>
/// <returns>The value, bounded in the 0-255 range</returns>
private static int BoundChannelValue(int value)
{
return(OneBitOfTools.Clamp(value, 0, 255));
}
