/**
* @brief Plays the sound in the first available channel.
*
* @param sound Sound to play.
* @return Voice identifier on success.
*/
int sound_play( int sound )
{
alVoice *v;
alSound *s;
if (sound_disabled)
return 0;
if ((sound < 0) || (sound >= sound_nlist))
return -1;
/* Gets a new voice. */
v = voice_new();
/* Get the sound. */
s = &sound_list[sound];
/* Try to play the sound. */
if (sound_sys_play( v, s ))
return -1;
/* Set state and add to list. */
v->state = VOICE_PLAYING;
v->id = ++voice_genid;
voice_add(v);
return v->id;
}
/**
* @brief Plays a sound based on position.
*
* @param sound Sound to play.
* @param px X position of the sound.
* @param py Y position of the sound.
* @param vx X velocity of the sound.
* @param vy Y velocity of the sound.
* @return Voice identifier on success.
*/
int sound_playPos( int sound, double px, double py, double vx, double vy )
{
alVoice *v;
alSound *s;
if (sound_disabled)
return 0;
if ((sound < 0) || (sound >= sound_nlist))
return -1;
/* Gets a new voice. */
v = voice_new();
/* Get the sound. */
s = &sound_list[sound];
/* Try to play the sound. */
if (sound_sys_playPos( v, s, px, py, vx, vy ))
return -1;
/* Actually add the voice to the list. */
v->state = VOICE_PLAYING;
v->id = ++voice_genid;
voice_add(v);
return v->id;
}
/**
* @brief Plays a sound based on position.
*
* @param sound Sound to play.
* @param px X position of the sound.
* @param py Y position of the sound.
* @param vx X velocity of the sound.
* @param vy Y velocity of the sound.
* @return Voice identifier on success.
*/
int sound_playPos( int sound, double px, double py, double vx, double vy )
{
alVoice *v;
alSound *s;
Pilot *p;
double cx, cy, dist;
int target;
if (sound_disabled)
return 0;
if ((sound < 0) || (sound >= sound_nlist))
return -1;
target = cam_getTarget();
/* Following a pilot. */
p = pilot_get(target);
if (target && (p != NULL)) {
if (!pilot_inRange( p, px, py ))
return 0;
}
/* Set to a position. */
else {
cam_getPos(&cx, &cy);
dist = pow2(px - cx) + pow2(py - cy);
if (dist > pilot_sensorRange())
return 0;
}
/* Gets a new voice. */
v = voice_new();
/* Get the sound. */
s = &sound_list[sound];
/* Try to play the sound. */
if (sound_sys_playPos( v, s, px, py, vx, vy ))
return -1;
/* Actually add the voice to the list. */
v->state = VOICE_PLAYING;
v->id = ++voice_genid;
voice_add(v);
return v->id;
}