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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 &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->supportBlendConstantColor())
00058 {
00059 <font class="comment">// Set opacity to 255 => 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->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 &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->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 &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->supportBlendConstantColor())
00151 {
00152 <font class="comment">// Set opacity to 255 => 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->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 &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->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>
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