From 5c3b4abf427b6bdd1643e9467e426aaecd59abe4 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Tue, 27 Apr 2004 20:45:58 +0000
Subject: [PATCH] Expose some of the positional components of the OpenAL API.

---
 simgear/sound/sample_openal.cxx   |  4 +++
 simgear/sound/sample_openal.hxx   | 21 +++++++++++++
 simgear/sound/soundmgr_openal.cxx | 25 +++++++++++++++
 simgear/sound/soundmgr_openal.hxx | 51 +++++++++++++++++++++++++++++++
 4 files changed, 101 insertions(+)

diff --git a/simgear/sound/sample_openal.cxx b/simgear/sound/sample_openal.cxx
index 7a84e78d..85beea84 100644
--- a/simgear/sound/sample_openal.cxx
+++ b/simgear/sound/sample_openal.cxx
@@ -129,6 +129,10 @@ SGSoundSample::SGSoundSample( const char *path, const char *file,
     alSourcefv( source, AL_POSITION, source_pos );
     alSourcefv( source, AL_VELOCITY, source_vel );
     alSourcei( source, AL_LOOPING, loop );
+
+    alSourcei( source, AL_SOURCE_RELATIVE, AL_TRUE );
+    alSourcef( source, AL_REFERENCE_DISTANCE, 250.0f );
+    alSourcef( source, AL_MAX_DISTANCE, 2000.0f );
 }
 
 
diff --git a/simgear/sound/sample_openal.hxx b/simgear/sound/sample_openal.hxx
index edc61ec8..90d4baeb 100644
--- a/simgear/sound/sample_openal.hxx
+++ b/simgear/sound/sample_openal.hxx
@@ -189,6 +189,27 @@ public:
     inline char *get_data() {
         return (char *)data;
     }
+
+    /**
+     * Set position of sound source (uses same coordinate system as opengl)
+     */
+    inline void set_source_pos( ALfloat *pos ) {
+        source_pos[0] = pos[0];
+        source_pos[1] = pos[1];
+        source_pos[2] = pos[2];
+        alSourcefv( source, AL_POSITION, source_pos );
+    }
+
+    /**
+     * Set velocity of sound source (uses same coordinate system as opengl)
+     */
+    inline void set_source_vel( ALfloat *vel ) {
+        source_vel[0] = vel[0];
+        source_vel[1] = vel[1];
+        source_vel[2] = vel[2];
+        alSourcefv( source, AL_VELOCITY, source_vel );
+    }
+
 };
 
 
diff --git a/simgear/sound/soundmgr_openal.cxx b/simgear/sound/soundmgr_openal.cxx
index 79200225..7c7b89b6 100644
--- a/simgear/sound/soundmgr_openal.cxx
+++ b/simgear/sound/soundmgr_openal.cxx
@@ -83,6 +83,9 @@ SGSoundMgr::SGSoundMgr() {
 	SG_LOG( SG_GENERAL, SG_ALERT,
                 "Oops AL error after audio initialization!" );
     }
+
+    // exaggerate the ear candy?
+    alDopplerFactor(1.0);
 }
 
 // destructor
@@ -267,3 +270,25 @@ bool SGSoundMgr::stop( const string& refname ) {
         return true;
     }
 }
+
+
+// set source position of all managed sounds
+void SGSoundMgr::set_source_pos_all( ALfloat *pos ) {
+    sample_map_iterator sample_current = samples.begin();
+    sample_map_iterator sample_end = samples.end();
+    for ( ; sample_current != sample_end; ++sample_current ) {
+	SGSoundSample *sample = sample_current->second;
+        sample->set_source_pos( pos );
+    }
+}
+
+
+// set source velocity of all managed sounds
+void SGSoundMgr::set_source_vel_all( ALfloat *vel ) {
+    sample_map_iterator sample_current = samples.begin();
+    sample_map_iterator sample_end = samples.end();
+    for ( ; sample_current != sample_end; ++sample_current ) {
+	SGSoundSample *sample = sample_current->second;
+        sample->set_source_vel( vel );
+    }
+}
diff --git a/simgear/sound/soundmgr_openal.hxx b/simgear/sound/soundmgr_openal.hxx
index 8fe1f67c..3f7c4cbd 100644
--- a/simgear/sound/soundmgr_openal.hxx
+++ b/simgear/sound/soundmgr_openal.hxx
@@ -173,6 +173,57 @@ public:
      * immediate stop playing the sound
      */
     bool stop( const string& refname );
+
+    /**
+     * set the position of the listener (in opengl coordinates)
+     */
+    inline void set_listener_pos( ALfloat *pos ) {
+        listener_pos[0] = pos[0];
+        listener_pos[1] = pos[1];
+        listener_pos[2] = pos[2];
+        alListenerfv( AL_POSITION, listener_pos );
+    }
+
+    /**
+     * set the velocity of the listener (in opengl coordinates)
+     */
+    inline void set_listener_vel( ALfloat *vel ) {
+        listener_vel[0] = vel[0];
+        listener_vel[1] = vel[1];
+        listener_vel[2] = vel[2];
+        alListenerfv( AL_VELOCITY, listener_vel );
+    }
+
+    /**
+     * set the orientation of the listener (in opengl coordinates)
+     *
+     * Description: ORIENTATION is a pair of 3-tuples representing the
+     * 'at' direction vector and 'up' direction of the Object in
+     * Cartesian space. AL expects two vectors that are orthogonal to
+     * each other. These vectors are not expected to be normalized. If
+     * one or more vectors have zero length, implementation behavior
+     * is undefined. If the two vectors are linearly dependent,
+     * behavior is undefined.
+     */
+    inline void set_listener_orientation( ALfloat *ori ) {
+        listener_ori[0] = ori[0];
+        listener_ori[1] = ori[1];
+        listener_ori[2] = ori[2];
+        listener_ori[3] = ori[3];
+        listener_ori[4] = ori[4];
+        listener_ori[5] = ori[5];
+        alListenerfv( AL_ORIENTATION, listener_ori );
+    }
+
+    /**
+     * set the positions of all managaged sound sources 
+     */
+    void set_source_pos_all( ALfloat *pos );
+
+    /**
+     * set the velocities of all managaged sound sources 
+     */
+    void set_source_vel_all( ALfloat *pos );
 };
 
 
-- 
2.39.5