X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fsound%2Fsoundmgr_openal.cxx;h=6066a560c32d1d22cc49679b387171fe0a8807d9;hb=afb18ca75b90e5a2e0bf791ba2e38812128ab0a8;hp=76b3f1381dcda5b5f766a841b27978de9034a56e;hpb=1ac944b7c1e7236e6d3493a7c23ea2c099109261;p=simgear.git

diff --git a/simgear/sound/soundmgr_openal.cxx b/simgear/sound/soundmgr_openal.cxx
index 76b3f138..6066a560 100644
--- a/simgear/sound/soundmgr_openal.cxx
+++ b/simgear/sound/soundmgr_openal.cxx
@@ -63,8 +63,9 @@ SGSoundMgr::SGSoundMgr() :
     _volume(0.0),
     _device(NULL),
     _context(NULL),
-    _position_geod(SGGeod::fromDeg(0,0)),
     _absolute_pos(SGVec3d::zeros()),
+    _offset_pos(SGVec3d::zeros()),
+    _base_pos(SGVec3d::zeros()),
     _velocity(SGVec3d::zeros()),
     _orientation(SGQuatd::zeros()),
     _devname(NULL)
@@ -132,11 +133,9 @@ void SGSoundMgr::init() {
     alDopplerFactor(1.0);
     alDopplerVelocity(340.3);   // speed of sound in meters per second.
 
-    if ( alIsExtensionPresent((const ALchar*)"EXT_exponent_distance") ) {
-        alDistanceModel(AL_EXPONENT_DISTANCE);
-    } else {
-        alDistanceModel(AL_INVERSE_DISTANCE);
-    }
+    // gain = AL_REFERENCE_DISTANCE / (AL_REFERENCE_DISTANCE +
+    //        AL_ROLLOFF_FACTOR * (distance - AL_REFERENCE_DISTANCE));
+    alDistanceModel(AL_INVERSE_DISTANCE_CLAMPED);
 
     testForALError("listener initialization");
 
@@ -245,6 +244,10 @@ void SGSoundMgr::unbind ()
 // run the audio scheduler
 void SGSoundMgr::update( double dt ) {
     if (_active) {
+        if (_changed) {
+            update_pos_and_orientation();
+        }
+
         sample_group_map_iterator sample_grp_current = _sample_groups.begin();
         sample_group_map_iterator sample_grp_end = _sample_groups.end();
         for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
@@ -258,7 +261,6 @@ if (isNaN(_at_up_vec)) printf("NaN in listener orientation\n");
 if (isNaN(toVec3f(_absolute_pos).data())) printf("NaN in listener position\n");
 if (isNaN(_velocity.data())) printf("NaN in listener velocity\n");
 #endif
-            update_pos_and_orientation();
             alListenerf( AL_GAIN, _volume );
             alListenerfv( AL_ORIENTATION, _at_up_vec );
             // alListenerfv( AL_POSITION, toVec3f(_absolute_pos).data() );
@@ -321,6 +323,7 @@ SGSampleGroup *SGSoundMgr::find( const string &refname, bool create ) {
         // sample group was not found.
         if (create) {
             SGSampleGroup* sgrp = new SGSampleGroup(this, refname);
+            add( sgrp, refname );
             return sgrp;
         }
         else 
@@ -462,9 +465,6 @@ void SGSoundMgr::release_buffer(SGSoundSample *sample)
 }
 
 void SGSoundMgr::update_pos_and_orientation() {
-    // cartesian position of the listener
-    _absolute_pos = SGVec3d::fromGeod( _position_geod );
-
     /**
      * Description: ORIENTATION is a pair of 3-tuples representing the
      * 'at' direction vector and 'up' direction of the Object in
@@ -473,6 +473,7 @@ void SGSoundMgr::update_pos_and_orientation() {
      * one or more vectors have zero length, implementation behavior
      * is undefined. If the two vectors are linearly dependent,
      * behavior is undefined.
+     *
      * This is in the same coordinate system as OpenGL; y=up, z=back, x=right.
      */
     SGVec3d sgv_at = _orientation.backTransform(-SGVec3d::e3());
@@ -483,6 +484,11 @@ void SGSoundMgr::update_pos_and_orientation() {
     _at_up_vec[3] = sgv_up[0];
     _at_up_vec[4] = sgv_up[1];
     _at_up_vec[5] = sgv_up[2];
+
+    // static const SGQuatd q(-0.5, -0.5, 0.5, 0.5);
+    // SGQuatd hlOr = SGQuatd::fromLonLat(SGGeod::fromCart(_base_pos));
+    // SGQuatd ec2body = hlOr*_orientation;
+    _absolute_pos = _base_pos; // + ec2body.backTransform( _offset_pos );
 }
 
 bool SGSoundMgr::load(string &samplepath, void **dbuf, int *fmt,