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<hr><h1>listener_al.cpp</h1><a href="listener__al_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025 
00026 <font class="preprocessor">#include "<a class="code" href="stdopenal_8h.html">stdopenal.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="listener__al_8h.html">listener_al.h</a>"</font>
00029 
00030 
00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00032 
00033 
00034 <font class="keyword">namespace </font>NLSOUND {
00035 
00036 
00037 <font class="comment">// The instance of the singleton</font>
<a name="l00038"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#r0">00038</a> CListenerAL     *CListenerAL::_Instance = NULL;
00039 
00040 
00041 <font class="comment">/*</font>
00042 <font class="comment"> * Constructor</font>
00043 <font class="comment"> */</font>
<a name="l00044"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#a0">00044</a> CListenerAL::CListenerAL() : IListener()
00045 {
00046         <font class="keywordflow">if</font> ( <a class="code" href="classNLSOUND_1_1CListenerAL.html#r0">_Instance</a> == NULL )
00047         {
00048                 <a class="code" href="classNLSOUND_1_1CListenerAL.html#r0">_Instance</a> = <font class="keyword">this</font>;
00049         }
00050         <font class="keywordflow">else</font>
00051         {
00052                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Listener singleton instanciated twice"</font> );
00053         }
00054 }
00055 
00056 
00057 <font class="comment">/*</font>
00058 <font class="comment"> * Set the position vector (default: (0,0,0)) (3D mode only)</font>
00059 <font class="comment"> */</font>
<a name="l00060"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_0">00060</a> <font class="keywordtype">void</font>                                    CListenerAL::setPos( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; pos )
00061 {
00062         <a class="code" href="classNLSOUND_1_1CListenerAL.html#o0">_Pos</a> = pos;
00063         <font class="comment">// Coordinate system: conversion from NeL to OpenAL/GL:</font>
00064         alListener3f( AL_POSITION, pos.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>, pos.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>, -pos.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> );
00065         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00066 }
00067 
00068 
<a name="l00072"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_1">00072</a> <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> &amp;CListenerAL::getPos()<font class="keyword"> const</font>
00073 <font class="keyword"></font>{
00074         <font class="keywordflow">return</font> <a class="code" href="classNLSOUND_1_1CListenerAL.html#o0">_Pos</a>;
00075 
00076 <font class="comment">// Currently, the OpenAL headers are different between Windows and Linux versions !</font>
00077 <font class="comment">// alGetListener3f() is part of the spec, though.</font>
00078 <font class="comment">/*</font>
00079 <font class="comment">#ifdef NL_OS_WINDOWS</font>
00080 <font class="comment">        // Coordsys conversion</font>
00081 <font class="comment">        float glposz;</font>
00082 <font class="comment">        alGetListener3f( AL_POSITION, &amp;pos.x, &amp;pos.z, &amp;glposz );</font>
00083 <font class="comment">        pos.y = -glposz;</font>
00084 <font class="comment">#else</font>
00085 <font class="comment">        float posarray [3];</font>
00086 <font class="comment">        alGetListenerfv( AL_POSITION, posarray );</font>
00087 <font class="comment">        // Coordsys conversion</font>
00088 <font class="comment">        pos.set( posarray[0], -posarray[2], posarray[1] );</font>
00089 <font class="comment">#endif</font>
00090 <font class="comment">        TestALError();</font>
00091 <font class="comment">*/</font>
00092 }
00093 
00094 
00095 <font class="comment">/*</font>
00096 <font class="comment"> * Set the velocity vector (3D mode only)</font>
00097 <font class="comment"> */</font>
<a name="l00098"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_2">00098</a> <font class="keywordtype">void</font>                                    CListenerAL::setVelocity( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; vel )
00099 {
00100         <font class="comment">// Coordsys conversion</font>
00101         alListener3f( AL_VELOCITY, vel.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>, vel.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>, -vel.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> );
00102         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00103 }
00104 
00105 
00106 <font class="comment">/*</font>
00107 <font class="comment"> * Get the velocity vector</font>
00108 <font class="comment"> */</font>
<a name="l00109"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_3">00109</a> <font class="keywordtype">void</font>                                    CListenerAL::getVelocity( <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; vel )<font class="keyword"> const</font>
00110 <font class="keyword"></font>{
00111 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00112 <font class="preprocessor"></font>        <font class="comment">// Coordsys conversion</font>
00113         <font class="keywordtype">float</font> glposz;
00114         alGetListener3f( AL_VELOCITY, &amp;vel.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>, &amp;vel.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>, &amp;glposz );
00115         vel.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a> = - glposz;
00116 <font class="preprocessor">#else</font>
00117 <font class="preprocessor"></font>        <font class="keywordtype">float</font> velarray [3];
00118         alGetListenerfv( AL_VELOCITY, velarray );
00119         <font class="comment">// Coordsys conversion</font>
00120         vel.<a class="code" href="classNLMISC_1_1CVector.html#z332_0">set</a>( velarray[0], -velarray[2], velarray[1] );
00121 <font class="preprocessor">#endif</font>
00122 <font class="preprocessor"></font>        <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00123 }
00124 
00125 
00126 <font class="comment">/*</font>
00127 <font class="comment"> * Set the orientation vectors (3D mode only)</font>
00128 <font class="comment"> */</font>
<a name="l00129"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_4">00129</a> <font class="keywordtype">void</font>                                    CListenerAL::setOrientation( <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; front, <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; up )
00130 {
00131         <font class="comment">// Forward then up</font>
00132         ALfloat <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[6];
00133         <font class="comment">// Coordsys conversion</font>
00134         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[0] = front.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>;
00135         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[1] = front.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>;
00136         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[2] = -front.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>;
00137         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[3] = up.<a class="code" href="classNLMISC_1_1CVector.html#m0">x</a>;
00138         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[4] = up.<a class="code" href="classNLMISC_1_1CVector.html#m2">z</a>;
00139         <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[5] = -up.<a class="code" href="classNLMISC_1_1CVector.html#m1">y</a>;
00140         alListenerfv( AL_ORIENTATION, <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a> );
00141         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00142 }
00143 
00144 
00145 <font class="comment">/*</font>
00146 <font class="comment"> * Get the orientation vectors</font>
00147 <font class="comment"> */</font>
<a name="l00148"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_5">00148</a> <font class="keywordtype">void</font>                                    CListenerAL::getOrientation( <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; front, <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a>&amp; up )<font class="keyword"> const</font>
00149 <font class="keyword"></font>{
00150         <font class="comment">// Forward then up</font>
00151         ALfloat <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[6];
00152         alGetListenerfv( AL_ORIENTATION, <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a> );
00153         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00154         <font class="comment">// Coordsys conversion</font>
00155         front.<a class="code" href="classNLMISC_1_1CVector.html#z332_0">set</a>( <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[0], -<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[2], <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[1] );
00156         up.<a class="code" href="classNLMISC_1_1CVector.html#z332_0">set</a>( <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[3], -<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[5], <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>[4] );
00157 }
00158 
00159 
00160 <font class="comment">/* Set the gain (volume value inside [0 , 1]). (default: 1)</font>
00161 <font class="comment"> * 0.0 -&gt; silence</font>
00162 <font class="comment"> * 0.5 -&gt; -6dB</font>
00163 <font class="comment"> * 1.0 -&gt; no attenuation</font>
00164 <font class="comment"> * values &gt; 1 (amplification) not supported by most drivers</font>
00165 <font class="comment"> */</font>
<a name="l00166"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_6">00166</a> <font class="keywordtype">void</font>                                    CListenerAL::setGain( <font class="keywordtype">float</font> gain )
00167 {
00168         alListenerf( AL_GAIN, gain );
00169         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00170 }
00171 
00172 
00173 <font class="comment">/*</font>
00174 <font class="comment"> * Get the gain</font>
00175 <font class="comment"> */</font>
<a name="l00176"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z973_7">00176</a> <font class="keywordtype">float</font>                                   CListenerAL::getGain()<font class="keyword"> const</font>
00177 <font class="keyword"></font>{
00178         ALfloat gain;
00179 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00180 <font class="preprocessor"></font>        alGetListenerf( AL_GAIN, &amp;gain );
00181 <font class="preprocessor">#else</font>
00182 <font class="preprocessor"></font>        alGetListenerfv( AL_GAIN, &amp;gain );
00183 <font class="preprocessor">#endif</font>
00184 <font class="preprocessor"></font>        <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00185         <font class="keywordflow">return</font> gain;
00186 }
00187 
00188 
00189 <font class="comment">/*</font>
00190 <font class="comment"> * Set the doppler factor (default: 1) to exaggerate or not the doppler effect</font>
00191 <font class="comment"> */</font>
<a name="l00192"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z974_0">00192</a> <font class="keywordtype">void</font>                                    CListenerAL::setDopplerFactor( <font class="keywordtype">float</font> f )
00193 {
00194         alDopplerFactor( f );
00195         <a class="code" href="sound__driver__al_8h.html#a0">TestALError</a>();
00196 }
00197 
00198 
00199 <font class="comment">/*</font>
00200 <font class="comment"> * Set the rolloff factor (default: 1) to scale the distance attenuation effect</font>
00201 <font class="comment"> */</font>
<a name="l00202"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z974_1">00202</a> <font class="keywordtype">void</font>                                    CListenerAL::setRolloffFactor( <font class="keywordtype">float</font> f )
00203 {
00204         <a class="code" href="debug_8h.html#a6">nlassert</a>( CSoundDriverAL::instance() != NULL );
00205         CSoundDriverAL::instance()-&gt;applyRolloffFactor( f );
00206 }
00207 
00208 
00209 <font class="comment">/*</font>
00210 <font class="comment"> * Set DSPROPERTY_EAXLISTENER_ENVIRONMENT and DSPROPERTY_EAXLISTENER_ENVIRONMENTSIZE if EAX available (see EAX listener properties)</font>
00211 <font class="comment"> */</font>
<a name="l00212"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z974_2">00212</a> <font class="keywordtype">void</font>                                    CListenerAL::setEnvironment( uint env, <font class="keywordtype">float</font> size )
00213 {
00214 <font class="preprocessor">#ifdef EAX_AVAILABLE</font>
00215 <font class="preprocessor"></font>        <font class="keywordflow">if</font> ( EAXSetProp != NULL )
00216         {
00217                 EAXSetProp( &amp;DSPROPSETID_EAX_ListenerProperties, DSPROPERTY_EAXLISTENER_ENVIRONMENT, 0, &amp;env, <font class="keyword">sizeof</font>(<font class="keywordtype">unsigned</font> <font class="keywordtype">long</font>) );
00218                 EAXSetProp( &amp;DSPROPSETID_EAX_ListenerProperties, DSPROPERTY_EAXLISTENER_ENVIRONMENTSIZE, 0, &amp;size, <font class="keyword">sizeof</font>(<font class="keywordtype">float</font>) );
00219         }
00220 <font class="preprocessor">#endif</font>
00221 <font class="preprocessor"></font>}
00222 
00223 
00224 <font class="comment">/*</font>
00225 <font class="comment"> * Set any EAX listener property if EAX available</font>
00226 <font class="comment"> */</font>
<a name="l00227"></a><a class="code" href="classNLSOUND_1_1CListenerAL.html#z974_3">00227</a> <font class="keywordtype">void</font>                                    CListenerAL::setEAXProperty( uint prop, <font class="keywordtype">void</font> *<a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>, uint valuesize )
00228 {
00229 <font class="preprocessor">#ifdef EAX_AVAILABLE</font>
00230 <font class="preprocessor"></font>        <font class="keywordflow">if</font> ( EAXSetProp != NULL )
00231         {
00232                 EAXSetProp( &amp;DSPROPSETID_EAX_ListenerProperties, prop, 0, <a class="code" href="driver__opengl__extension__def_8h.html#a415">value</a>, valuesize );
00233         }
00234 <font class="preprocessor">#endif</font>
00235 <font class="preprocessor"></font>}
00236 
00237 
00238 } <font class="comment">// NLSOUND</font>
</pre></div>

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