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<hr><h1>motion_blur.cpp</h1><a href="motion__blur_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2000, 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="std3d_8h.html">std3d.h</a>"</font>
00027
00028 <font class="preprocessor">#include "<a class="code" href="common_8h.html">nel/misc/common.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="motion__blur_8h.html">3d/motion_blur.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="driver_8h.html">3d/driver.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="texture_8h.html">3d/texture.h</a>"</font>
00032 <font class="preprocessor">#include "<a class="code" href="texture__blank_8h.html">3d/texture_blank.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="material_8h.html">3d/material.h</a>"</font>
00034
00035
00036 <font class="keyword">namespace </font>NL3D {
00037
00038
<a name="l00039"></a><a class="code" href="classNL3D_1_1CMotionBlur.html#a0">00039</a> CMotionBlur::CMotionBlur() : _Tex(NULL), _X(0), _Y(0), _W(0), _H(0)
00040 {
00041 }
00042
00043
00044
<a name="l00045"></a><a class="code" href="classNL3D_1_1CMotionBlur.html#a1">00045</a> <font class="keywordtype">void</font> CMotionBlur::startMotionBlur(uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, uint <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>)
00046 {
00047 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> > 0 && <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> > 0) ;
00048 <a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a> ;
00049 <a class="code" href="classNL3D_1_1CMotionBlur.html#n2">_Y</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a> ;
00050 <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a> ;
00051 <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> ;
00052 <a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a> = <font class="keyword">new</font> CTextureBlank ;
00053 <a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a>->resize(NLMISC::raiseToNextPowerOf2(<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>), NLMISC::raiseToNextPowerOf2(<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>)) ;
00054 }
00055
<a name="l00056"></a><a class="code" href="classNL3D_1_1CMotionBlur.html#a2">00056</a> <font class="keywordtype">void</font> CMotionBlur::releaseMotionBlur()
00057 {
00058 <a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a> = NULL ;
00059 <a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a> = <a class="code" href="classNL3D_1_1CMotionBlur.html#n2">_Y</a> = <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a> = <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a> = 0 ;
00060 }
00061
<a name="l00062"></a><a class="code" href="classNL3D_1_1CMotionBlur.html#a3">00062</a> <font class="keywordtype">void</font> CMotionBlur::performMotionBlur(IDriver *driver, <font class="keywordtype">float</font> motionBlurAmount)
00063 {
00064 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a>) ; <font class="comment">//start motion blur has not been called !!</font>
00065 <a class="code" href="debug_8h.html#a6">nlassert</a>(driver) ;
00066 <a class="code" href="debug_8h.html#a6">nlassert</a>(motionBlurAmount >= 0.f && motionBlurAmount <= 1.f) ;
00067
00068 <font class="keyword">static</font> CVertexBuffer vb ;
00069 vb.setVertexFormat(CVertexBuffer::PositionFlag | CVertexBuffer::TexCoord0Flag ) ;
00070 vb.setNumVertices(4) ;
00071
00072 uint32 <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> ;
00073 driver->getWindowSize(<a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>) ;
00074
00075 <font class="keywordtype">float</font> widthRatio = <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a> / (float) <a class="code" href="namespaceNLMISC.html#a223">NLMISC::raiseToNextPowerOf2</a> (<a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a>) ;
00076 <font class="keywordtype">float</font> heightRatio = <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a> / (float) <a class="code" href="namespaceNLMISC.html#a223">NLMISC::raiseToNextPowerOf2</a> (<a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a>) ;
00077
00078 driver->setFrustum(0, (<font class="keywordtype">float</font>) <a class="code" href="driver__opengl__extension__def_8h.html#a389">width</a>, 0, (<font class="keywordtype">float</font>) <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>, -1, 1, <font class="keyword">false</font>) ;
00079
00080 <font class="keywordflow">for</font> (uint sn = 0 ; sn < 2 ; ++sn)
00081 {
00082 vb.setTexCoord(0, sn, CUV(0, 0)) ;
00083 vb.setTexCoord(1, sn, CUV(widthRatio, 0)) ;
00084 vb.setTexCoord(2, sn, CUV(widthRatio, heightRatio)) ;
00085 vb.setTexCoord(3, sn, CUV(0, heightRatio)) ;
00086 }
00087
00088
00089 <font class="keyword">static</font> CMaterial mbMat ;
00090 <font class="keyword">static</font> <font class="keywordtype">bool</font> matSetup = <font class="keyword">false</font> ; <font class="comment">// set to true when mbMat has Been setup</font>
00091 <font class="keywordflow">if</font> (!matSetup)
00092 {
00093 mbMat.setBlend(<font class="keyword">true</font>) ;
00094 mbMat.setBlendFunc(CMaterial::srcalpha, CMaterial::invsrcalpha) ;
00095 mbMat.setZWrite(<font class="keyword">false</font>) ;
00096 mbMat.setZFunc(CMaterial::always) ;
00097 <font class="comment">// stage 0 </font>
00098 mbMat.setTexture(0, <a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a>) ;
00099 mbMat.texEnvOpRGB(0, CMaterial::Replace );
00100
00101 mbMat.texEnvArg0Alpha(0, CMaterial::Diffuse, CMaterial::SrcAlpha);
00102 mbMat.texEnvOpAlpha(0, CMaterial::Replace);
00103
00104 mbMat.setDoubleSided(<font class="keyword">true</font>) ;
00105 matSetup = <font class="keyword">true</font> ;
00106 }
00107
00108
00109 mbMat.setColor(CRGBA(255, 255, 255, (uint8) (255.f * motionBlurAmount) ) ) ;
00110
00111
00112 vb.setVertexCoord(0, CVector((<font class="keywordtype">float</font>) <a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a>, 0, 0) ) ;
00113 vb.setVertexCoord(1, CVector((<font class="keywordtype">float</font>) (<a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a> + <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a>), 0 ,0) ) ;
00114 vb.setVertexCoord(2, CVector((<font class="keywordtype">float</font>) (<a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a> + <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a>), 0, (<font class="keywordtype">float</font>) (<a class="code" href="classNL3D_1_1CMotionBlur.html#n2">_Y</a> + <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a>) ) );
00115 vb.setVertexCoord(3, CVector(0 , 0, (<font class="keywordtype">float</font>) (<a class="code" href="classNL3D_1_1CMotionBlur.html#n2">_Y</a> + <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a>) ) ) ;
00116
00117 driver->setupViewMatrix(CMatrix::Identity) ;
00118 driver->setupModelMatrix(CMatrix::Identity) ;
00119
00120
00121 driver->activeVertexBuffer(vb) ;
00122 driver->renderQuads(mbMat, 0, 1) ;
00123
00124 <font class="comment">// blit back frame buffer to save this frame</font>
00125
00126
00127
00128 driver->copyFrameBufferToTexture(<a class="code" href="classNL3D_1_1CMotionBlur.html#n0">_Tex</a>, 0, 0, 0, <a class="code" href="classNL3D_1_1CMotionBlur.html#n1">_X</a>, <a class="code" href="classNL3D_1_1CMotionBlur.html#n2">_Y</a>, <a class="code" href="classNL3D_1_1CMotionBlur.html#n3">_W</a>, <a class="code" href="classNL3D_1_1CMotionBlur.html#n4">_H</a>) ;
00129
00130
00131 }
00132
00133
00134 } <font class="comment">// NL3D</font>
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