Try fixing a bug with calculating the relative position of a sound.

research/miniaudio_engine.c

@@ -188,10 +188,12 @@ int main(int argc, char** argv)
         }
 
         //ma_spatializer_set_position(&g_spatializer, ma_vec3f_init_3f(posX, 0, posZ));
-        ma_sound_set_position(&sound, posX, 0, posZ);
-        ma_sound_set_velocity(&sound, step*1000, 0, 0);
+        ma_sound_set_position(&sound, 0, 0, -2);
+        ma_engine_listener_set_position(&engine, 0, 0, 0, -20);
+        ma_engine_listener_set_direction(&engine, 0, -1, 0, 0);
+        //ma_sound_set_velocity(&sound, step*1000, 0, 0);
 
-        //ma_engine_listener_set_direciton(&engine, (float)ma_cos(angle), 0, (float)ma_sin(angle));
+        ma_engine_listener_set_direction(&engine, 0, (float)ma_cos(angle), 0, (float)ma_sin(angle));
         angle += stepAngle;
 
         ma_sleep(1);

research/miniaudio_engine.h

@@ -9376,17 +9376,17 @@ MA_API ma_result ma_spatializer_process_pcm_frames(ma_spatializer* pSpatializer,
             */
             v = pSpatializer->position;
             #if 1
-            {
-                relativePos.x = m[0][0] * v.x + m[1][0] * v.y + m[2][0] * v.z + m[3][0] * 1;
-                relativePos.y = m[0][1] * v.x + m[1][1] * v.y + m[2][1] * v.z + m[3][1] * 1;
-                relativePos.z = m[0][2] * v.x + m[1][2] * v.y + m[2][2] * v.z + m[3][2] * 1;
-            }
-            #else
             {
                 relativePos.x = m[0][0] * v.x + m[0][1] * v.y + m[0][2] * v.z + m[0][3] * 1;
                 relativePos.y = m[1][0] * v.x + m[1][1] * v.y + m[1][2] * v.z + m[1][3] * 1;
                 relativePos.z = m[2][0] * v.x + m[2][1] * v.y + m[2][2] * v.z + m[2][3] * 1;
             }
+            #else
+            {
+                relativePos.x = m[0][0] * v.x + m[1][0] * v.y + m[2][0] * v.z + m[3][0] * 1;
+                relativePos.y = m[0][1] * v.x + m[1][1] * v.y + m[2][1] * v.z + m[3][1] * 1;
+                relativePos.z = m[0][2] * v.x + m[1][2] * v.y + m[2][2] * v.z + m[3][2] * 1;
+            }
             #endif
 
             /*