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use correct velocity scaling for openal audio sources

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This commit is contained in:
xorw 2017-05-20 07:23:24 +02:00
parent 505c67385e
commit ff54b3ac1f
1 changed files with 11 additions and 2 deletions
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13
src/client/sound/openal.c
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@ -43,6 +43,11 @@
#define AL_UnpackVector(v) - v[1], v[2], -v[0]
#define AL_CopyVector(a, b) ((b)[0] = -(a)[1], (b)[1] = (a)[2], (b)[2] = -(a)[0])
// avg US male height / q2PlayerHeight = 1.764f / 56.0f = 0.0315f
// see: https://en.wikipedia.org/wiki/List_of_average_human_height_worldwide
// see: PutClientInServer(edict_t *ent) bbox
#define AL_METER_OF_Q2_UNIT 0.0315f
/* The OpenAL implementation should support
at least this number of sources */
#define MIN_CHANNELS 16
@ -221,6 +226,7 @@ AL_Spatialize(channel_t *ch)
qalSource3f(ch->srcnum, AL_POSITION, AL_UnpackVector(origin));
CL_GetEntitySoundVelocity(ch->entnum, velocity);
VectorScale(velocity, AL_METER_OF_Q2_UNIT, velocity);
qalSource3f(ch->srcnum, AL_VELOCITY, AL_UnpackVector(velocity));
return;
}
@ -619,8 +625,7 @@ AL_Update(void)
qalListenerfv(AL_ORIENTATION, orientation);
CL_GetViewVelocity(listener_velocity);
// xorw: sounds funky if not scaled down a lot
VectorScale(listener_velocity, 0.05f, listener_velocity);
VectorScale(listener_velocity, AL_METER_OF_Q2_UNIT, listener_velocity);
qalListener3f(AL_VELOCITY, AL_UnpackVector(listener_velocity));
/* update spatialization for dynamic sounds */
@ -840,6 +845,10 @@ AL_Init(void)
AL_InitUnderwaterFilter();
Com_Printf("Number of OpenAL sources: %d\n\n", s_numchannels);
// exaggerate 2x because realistic is barely noticeable
qalDopplerFactor(2.0f);
return true;
}