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<hr><h1>driver_opengl_light.cpp</h1><a href="driver__opengl__light_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000 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="stdopengl_8h.html">stdopengl.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="light_8h.html">3d/light.h</a>"</font>
00029 
00030 <font class="keyword">namespace </font>NL3D 
00031 {
00032 
00033 
00034 <font class="comment">// ***************************************************************************</font>
<a name="l00035"></a><a class="code" href="classNL3D_1_1CDriverGL.html#a74">00035</a> <a class="code" href="types__nl_8h.html#a13">uint</a>    CDriverGL::getMaxLight ()<font class="keyword"> const</font>
00036 <font class="keyword"></font>{
00037         <font class="comment">// return min(maxLight supported by openGL, MaxLight=8).</font>
00038         <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CDriverGL.html#o30">_MaxDriverLight</a>;
00039 }
00040 
00041 <font class="comment">// ***************************************************************************</font>
00042 
<a name="l00043"></a><a class="code" href="classNL3D_1_1CDriverGL.html#a75">00043</a> <font class="keywordtype">void</font>    CDriverGL::setLight (<a class="code" href="types__nl_8h.html#a5">uint8</a> num, <font class="keyword">const</font> CLight&amp; light)
00044 {
00045         <font class="comment">// Check light count is good</font>
00046 <font class="comment">//      nlassert (num&lt;_MaxDriverLight);</font>
00047         
00048         <font class="comment">// Set the light</font>
00049         <font class="keywordflow">if</font> (num&lt;<a class="code" href="classNL3D_1_1CDriverGL.html#o30">_MaxDriverLight</a>)
00050         {
00051                 <font class="comment">// GL light number</font>
00052                 GLenum lightNum=(GLenum)(GL_LIGHT0+num);
00053 
00054                 <font class="comment">// Get light mode</font>
00055                 CLight::TLightMode mode=light.getMode ();
00056 
00057                 <font class="comment">// Copy the mode</font>
00058                 <a class="code" href="classNL3D_1_1CDriverGL.html#o32">_LightMode</a>[num]=mode;
00059 
00060                 <font class="comment">// Set the ambiant color</font>
00061                 GLfloat colorGL[4];
00062                 CRGBA colorNeL=light.getAmbiant ();
00063                 colorGL[0]=(float)colorNeL.R/255.f;
00064                 colorGL[1]=(float)colorNeL.G/255.f;
00065                 colorGL[2]=(float)colorNeL.B/255.f;
00066                 colorGL[3]=1.f;
00067                 glLightfv (lightNum, GL_AMBIENT, colorGL);
00068 
00069                 <font class="comment">// Set the diffuse color</font>
00070                 colorNeL=light.getDiffuse ();
00071                 colorGL[0]=(float)colorNeL.R/255.f;
00072                 colorGL[1]=(float)colorNeL.G/255.f;
00073                 colorGL[2]=(float)colorNeL.B/255.f;
00074                 colorGL[3]=1.f;
00075                 glLightfv (lightNum, GL_DIFFUSE, colorGL);
00076 
00077                 <font class="comment">// Set the specular color</font>
00078                 colorNeL=light.getSpecular ();
00079                 colorGL[0]=(float)colorNeL.R/255.f;
00080                 colorGL[1]=(float)colorNeL.G/255.f;
00081                 colorGL[2]=(float)colorNeL.B/255.f;
00082                 colorGL[3]=1.f;
00083                 glLightfv (lightNum, GL_SPECULAR, colorGL);
00084 
00085                 <font class="comment">// Set light attenuation</font>
00086                 glLightf (lightNum, GL_CONSTANT_ATTENUATION, light.getConstantAttenuation());
00087                 glLightf (lightNum, GL_LINEAR_ATTENUATION, light.getLinearAttenuation());
00088                 glLightf (lightNum, GL_QUADRATIC_ATTENUATION, light.getQuadraticAttenuation());
00089 
00090                 <font class="comment">// Set the position</font>
00091                 <font class="keywordflow">if</font> ((mode==CLight::DirectionalLight)||(mode==CLight::SpotLight))
00092                 {
00093                         <font class="comment">// Get the direction of the light</font>
00094                         <a class="code" href="classNL3D_1_1CDriverGL.html#o34">_WorldLightDirection</a>[num]=light.getDirection ();
00095                 }
00096 
00097                 <font class="keywordflow">if</font> (mode!=CLight::DirectionalLight)
00098                 {
00099                         <font class="comment">// Get the position of the light</font>
00100                         <a class="code" href="classNL3D_1_1CDriverGL.html#o33">_WorldLightPos</a>[num]=light.getPosition ();
00101                 }
00102 
00103                 <font class="keywordflow">if</font> (mode==CLight::SpotLight)
00104                 {
00105                         <font class="comment">// Get the exponent of the spot</font>
00106                         <font class="keywordtype">float</font> exponent=light.getExponent ();
00107 
00108                         <font class="comment">// Set it</font>
00109                         glLightf (lightNum, GL_SPOT_EXPONENT, exponent);
00110 
00111                         <font class="comment">// Get the cutoff of the spot</font>
00112                         <font class="keywordtype">float</font> cutoff=180.f*(light.getCutoff ()/(float)NLMISC::Pi);
00113 
00114                         <font class="comment">// Set it</font>
00115                         glLightf (lightNum, GL_SPOT_CUTOFF, cutoff);
00116                 }
00117                 <font class="keywordflow">else</font>
00118                 {
00119                         <font class="comment">// Disactive spot properties</font>
00120                         glLighti (lightNum, GL_SPOT_CUTOFF, 180);
00121                         glLighti (lightNum, GL_SPOT_EXPONENT, 0);
00122                 }
00123 
00124                 <a class="code" href="classNL3D_1_1CDriverGL.html#o7">_ViewMatrixSetupDirty</a>=<font class="keyword">true</font>;
00125         }
00126 }
00127 
00128 <font class="comment">// ***************************************************************************</font>
00129 
<a name="l00130"></a><a class="code" href="classNL3D_1_1CDriverGL.html#a76">00130</a> <font class="keywordtype">void</font>    CDriverGL::enableLight (<a class="code" href="types__nl_8h.html#a5">uint8</a> num, <font class="keywordtype">bool</font> enable)
00131 {
00132         <font class="comment">// Check light count is good</font>
00133 <font class="comment">//      nlassert (num&lt;_MaxDriverLight);</font>
00134 
00135         <font class="comment">// Enable glLight</font>
00136         <font class="keywordflow">if</font> (num&lt;<a class="code" href="classNL3D_1_1CDriverGL.html#o30">_MaxDriverLight</a>)
00137         {
00138                 <font class="comment">// Enable the light</font>
00139                 <a class="code" href="classNL3D_1_1CDriverGL.html#o31">_LightEnable</a>[num]=enable;
00140 
00141                 <font class="comment">// Enable GL</font>
00142                 <font class="keywordflow">if</font> (enable)
00143                         glEnable ((GLenum)(GL_LIGHT0+num));
00144                 <font class="keywordflow">else</font>
00145                         glDisable ((GLenum)(GL_LIGHT0+num));
00146         }
00147 }
00148 
00149 <font class="comment">// ***************************************************************************</font>
00150 
<a name="l00151"></a><a class="code" href="classNL3D_1_1CDriverGL.html#a78">00151</a> <font class="keywordtype">void</font>    CDriverGL::setAmbientColor (CRGBA color)
00152 {
00153         <font class="comment">// Gl array</font>
00154         GLfloat array[4];
00155         array[0]=(float)color.R/255.f;
00156         array[1]=(float)color.G/255.f;
00157         array[2]=(float)color.B/255.f;
00158         array[3]=1.f;
00159 
00160         <font class="comment">// Set the color</font>
00161         glLightModelfv (GL_LIGHT_MODEL_AMBIENT, array);
00162 }
00163 
00164 <font class="comment">// ***************************************************************************</font>
00165 
00166 } <font class="comment">// NL3D</font>
</pre></div>

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