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+<hr><h1>mesh_blender.cpp</h1><a href="mesh__blender_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
+00007 <font class="comment">/* Copyright, 2000-2002 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="std3d_8h.html">std3d.h</a>"</font>
+00027
+00028 <font class="preprocessor">#include "<a class="code" href="mesh__blender_8h.html">3d/mesh_blender.h</a>"</font>
+00029 <font class="preprocessor">#include "<a class="code" href="driver_8h.html">3d/driver.h</a>"</font>
+00030 <font class="preprocessor">#include "<a class="code" href="fast__floor_8h.html">3d/fast_floor.h</a>"</font>
+00031
+00032
+00033 <font class="keyword">namespace </font>NL3D {
+00034
+00035
+00036 <font class="comment">// ***************************************************************************</font>
+<a name="l00037"></a><a class="code" href="classNL3D_1_1CMeshBlender.html#a1">00037</a> <font class="keywordtype">void</font> CMeshBlender::prepareRenderForGlobalAlpha(CMaterial &amp;material, IDriver *drv, <font class="keywordtype">float</font> globalAlpha, uint8 globalAlphaInt, <font class="keywordtype">bool</font> gaDisableZWrite)
+00038 {
+00039 <font class="comment">// Disable ZWrite??</font>
+00040 <font class="keywordflow">if</font>(gaDisableZWrite)
+00041 {
+00042 <font class="comment">// Backup and set new the zwrite</font>
+00043 <a class="code" href="classNL3D_1_1CMeshBlender.html#o1">_BkZWrite</a>=material.getZWrite ();
+00044 material.setZWrite (<font class="keyword">false</font>);
+00045 }
+00046
+00047 <font class="comment">// Backup blend</font>
+00048 <a class="code" href="classNL3D_1_1CMeshBlender.html#o2">_BkBlend</a>=material.getBlend ();
+00049 material.setBlend (<font class="keyword">true</font>);
+00050
+00051 <font class="comment">// Backup opacity and blend</font>
+00052 <a class="code" href="classNL3D_1_1CMeshBlender.html#o0">_BkOpacity</a>= material.getOpacity ();
+00053 <a class="code" href="classNL3D_1_1CMeshBlender.html#o3">_BkSrcBlend</a>= material.getSrcBlend();
+00054 <a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a>= material.getDstBlend();
+00055
+00056 <font class="comment">// 2 ways: if Blend Constant Color is supported or not.</font>
+00057 <font class="keywordflow">if</font>(drv-&gt;supportBlendConstantColor())
+00058 {
+00059 <font class="comment">// Set opacity to 255 =&gt; If AlphaTest is used, AlphaTexture will be multiplied by 1.</font>
+00060 material.setOpacity ( 255 );
+00061
+00062 <font class="comment">// set the Blend constant Alpha.</font>
+00063 drv-&gt;setBlendConstantColor( CRGBA(0,0,0, globalAlphaInt) );
+00064
+00065 <font class="comment">// Active Blend with Blend Constant Alpha .</font>
+00066 material.setSrcBlend(CMaterial::blendConstantAlpha);
+00067
+00068 <font class="comment">// Don't set dest if we are in additive blend mode</font>
+00069 <font class="keywordflow">if</font> ((<a class="code" href="classNL3D_1_1CMeshBlender.html#o2">_BkBlend</a> == <font class="keyword">false</font>) || (<a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a> != CMaterial::one))
+00070 material.setDstBlend(CMaterial::blendConstantInvAlpha);
+00071
+00072 <font class="comment">// if material is Alpha Test, no-op. Keep same threshold, since Use Alpha of the BlendConstantColor</font>
+00073 <font class="comment">// to do the alpha-blending.</font>
+00074 }
+00075 <font class="comment">// not supported, ugly way: modify Opacity, and alpha threshold</font>
+00076 <font class="keywordflow">else</font>
+00077 {
+00078 <font class="comment">// New opacity</font>
+00079 material.setOpacity (globalAlphaInt);
+00080
+00081 <font class="comment">// must ensure Std Blend.</font>
+00082 material.setSrcBlend(CMaterial::srcalpha);
+00083
+00084 <font class="comment">// Don't set dest if we are in additive blend mode</font>
+00085 <font class="keywordflow">if</font> ((<a class="code" href="classNL3D_1_1CMeshBlender.html#o2">_BkBlend</a> == <font class="keyword">false</font>) || (<a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a> != CMaterial::one))
+00086 material.setDstBlend(CMaterial::invsrcalpha);
+00087
+00088 <font class="comment">// if material is Alpha Test, must modulate AlphaTest limit to avoid Pop effects</font>
+00089 <font class="keywordflow">if</font>(material.getAlphaTest())
+00090 {
+00091 <a class="code" href="classNL3D_1_1CMeshBlender.html#o5">_BkAlphaTestThreshold</a>= material.getAlphaTestThreshold();
+00092 material.setAlphaTestThreshold(<a class="code" href="classNL3D_1_1CMeshBlender.html#o5">_BkAlphaTestThreshold</a> * globalAlpha);
+00093 }
+00094 }
+00095
+00096 }
+00097
+00098 <font class="comment">// ***************************************************************************</font>
+<a name="l00099"></a><a class="code" href="classNL3D_1_1CMeshBlender.html#a2">00099</a> <font class="keywordtype">void</font> CMeshBlender::restoreRender(CMaterial &amp;material, IDriver *drv, <font class="keywordtype">bool</font> gaDisableZWrite)
+00100 {
+00101 <font class="comment">// Resetup backuped zwrite</font>
+00102 <font class="keywordflow">if</font>(gaDisableZWrite)
+00103 {
+00104 material.setZWrite (<a class="code" href="classNL3D_1_1CMeshBlender.html#o1">_BkZWrite</a>);
+00105 }
+00106
+00107 <font class="comment">// Resetup backuped blend</font>
+00108 material.setBlend (<a class="code" href="classNL3D_1_1CMeshBlender.html#o2">_BkBlend</a>);
+00109
+00110 <font class="comment">// Resetup backuped opacity and blend factors</font>
+00111 material.setOpacity (<a class="code" href="classNL3D_1_1CMeshBlender.html#o0">_BkOpacity</a>);
+00112 material.setSrcBlend(<a class="code" href="classNL3D_1_1CMeshBlender.html#o3">_BkSrcBlend</a>);
+00113 material.setDstBlend(<a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a>);
+00114
+00115 <font class="comment">// 2 ways: if Blend Constant Color is supported or not.</font>
+00116 <font class="keywordflow">if</font>(drv-&gt;supportBlendConstantColor())
+00117 {
+00118 <font class="comment">// nop</font>
+00119 }
+00120 <font class="keywordflow">else</font>
+00121 {
+00122 <font class="comment">// Resetup backuped AlphaTest threshold</font>
+00123 <font class="keywordflow">if</font>(material.getAlphaTest())
+00124 {
+00125 material.setAlphaTestThreshold(<a class="code" href="classNL3D_1_1CMeshBlender.html#o5">_BkAlphaTestThreshold</a>);
+00126 }
+00127 }
+00128 }
+00129
+00130
+00131 <font class="comment">// ***************************************************************************</font>
+<a name="l00132"></a><a class="code" href="classNL3D_1_1CMeshBlender.html#a3">00132</a> <font class="keywordtype">void</font> CMeshBlender::prepareRenderForGlobalAlphaCoarseMesh(CMaterial &amp;material, IDriver *drv, <a class="code" href="classNLMISC_1_1CRGBA.html">NLMISC::CRGBA</a> color, <font class="keywordtype">float</font> globalAlpha, <font class="keywordtype">bool</font> gaDisableZWrite)
+00133 {
+00134 <font class="comment">// Don't need to bkup some values, because CoarseMesh.</font>
+00135
+00136 uint8 globalAlphaInt= (uint8)<a class="code" href="namespaceNL3D.html#a362">OptFastFloor</a>(255 * globalAlpha);
+00137
+00138 <font class="comment">// Disable ZWrite??</font>
+00139 <font class="keywordflow">if</font>(gaDisableZWrite)
+00140 material.setZWrite (<font class="keyword">false</font>);
+00141 <font class="comment">// Enable blend</font>
+00142 material.setBlend (<font class="keyword">true</font>);
+00143
+00144 <font class="comment">// bkup color and blend factors.</font>
+00145 <a class="code" href="classNL3D_1_1CMeshBlender.html#o6">_BkupColor</a>= material.getColor();
+00146 <a class="code" href="classNL3D_1_1CMeshBlender.html#o3">_BkSrcBlend</a>= material.getSrcBlend();
+00147 <a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a>= material.getDstBlend();
+00148
+00149 <font class="comment">// 2 ways: if Blend Constant Color is supported or not.</font>
+00150 <font class="keywordflow">if</font>(drv-&gt;supportBlendConstantColor())
+00151 {
+00152 <font class="comment">// Set opacity to 255 =&gt; AlphaTexture will be multiplied by 1.</font>
+00153 color.<a class="code" href="classNLMISC_1_1CRGBA.html#m3">A</a>= 255;
+00154 <font class="comment">// change color</font>
+00155 material.setColor ( color );
+00156
+00157 <font class="comment">// set the Blend constant Alpha.</font>
+00158 drv-&gt;setBlendConstantColor( CRGBA(0,0,0, globalAlphaInt) );
+00159
+00160 <font class="comment">// Active Blend with Blend Constant Alpha .</font>
+00161 material.setSrcBlend(CMaterial::blendConstantAlpha);
+00162 material.setDstBlend(CMaterial::blendConstantInvAlpha);
+00163 }
+00164 <font class="keywordflow">else</font>
+00165 {
+00166 <font class="comment">// Set current Alpha blend transparency (in color becausematerial is unlit)</font>
+00167 color.<a class="code" href="classNLMISC_1_1CRGBA.html#m3">A</a>= globalAlphaInt;
+00168 <font class="comment">// change color</font>
+00169 material.setColor ( color );
+00170
+00171 <font class="comment">// Active Blend with Blend Constant Alpha .</font>
+00172 material.setSrcBlend(CMaterial::srcalpha);
+00173 material.setDstBlend(CMaterial::invsrcalpha);
+00174
+00175 <font class="comment">// must modulate AlphaTest limit to avoid Pop effects</font>
+00176 material.setAlphaTestThreshold(0.5f * globalAlpha);
+00177 }
+00178 }
+00179
+00180 <font class="comment">// ***************************************************************************</font>
+<a name="l00181"></a><a class="code" href="classNL3D_1_1CMeshBlender.html#a4">00181</a> <font class="keywordtype">void</font> CMeshBlender::restoreRenderCoarseMesh(CMaterial &amp;material, IDriver *drv, <font class="keywordtype">bool</font> gaDisableZWrite)
+00182 {
+00183 <font class="comment">// Resetup backuped color and blend factors</font>
+00184 material.setColor ( <a class="code" href="classNL3D_1_1CMeshBlender.html#o6">_BkupColor</a> );
+00185 material.setSrcBlend(<a class="code" href="classNL3D_1_1CMeshBlender.html#o3">_BkSrcBlend</a>);
+00186 material.setDstBlend(<a class="code" href="classNL3D_1_1CMeshBlender.html#o4">_BkDstBlend</a>);
+00187
+00188 <font class="comment">// ReEnable ZWrite??</font>
+00189 <font class="keywordflow">if</font>(gaDisableZWrite)
+00190 material.setZWrite (<font class="keyword">true</font>);
+00191 <font class="comment">// Reset blend</font>
+00192 material.setBlend (<font class="keyword">false</font>);
+00193
+00194 <font class="comment">// 2 ways: if Blend Constant Color is supported or not.</font>
+00195 <font class="keywordflow">if</font>(drv-&gt;supportBlendConstantColor())
+00196 {
+00197 <font class="comment">// nop</font>
+00198 }
+00199 <font class="keywordflow">else</font>
+00200 {
+00201 <font class="comment">// reset AlphaTest limit</font>
+00202 material.setAlphaTestThreshold(0.5f);
+00203 }
+00204 }
+00205
+00206 } <font class="comment">// NL3D</font>
+</pre></div>
+
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