<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>Irrlicht 3D Engine: irr::video::IShaderConstantSetCallBack Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css" /> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> </head> <body> <div id="top"><!-- do not remove this div! 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The OnSetConstants method will be called every frame now. </p> <p>Definition at line <a class="el" href="_i_shader_constant_set_call_back_8h_source.html#l00021">21</a> of file <a class="el" href="_i_shader_constant_set_call_back_8h_source.html">IShaderConstantSetCallBack.h</a>.</p> </div><hr/><h2>Member Function Documentation</h2> <a class="anchor" id="a91cf4eb8d20d278defaca4e3c9390396"></a><!-- doxytag: member="irr::video::IShaderConstantSetCallBack::OnSetConstants" ref="a91cf4eb8d20d278defaca4e3c9390396" args="(IMaterialRendererServices *services, s32 userData)=0" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">virtual void irr::video::IShaderConstantSetCallBack::OnSetConstants </td> <td>(</td> <td class="paramtype"><a class="el" href="classirr_1_1video_1_1_i_material_renderer_services.html">IMaterialRendererServices</a> * </td> <td class="paramname"><em>services</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6">s32</a> </td> <td class="paramname"><em>userData</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td><code> [pure virtual]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Called by the engine when the vertex and/or pixel shader constants for an material renderer should be set. </p> <p>Implement the <a class="el" href="classirr_1_1video_1_1_i_shader_constant_set_call_back.html" title="Interface making it possible to set constants for gpu programs every frame.">IShaderConstantSetCallBack</a> in an own class and implement your own OnSetConstants method using the given <a class="el" href="classirr_1_1video_1_1_i_material_renderer_services.html" title="Interface providing some methods for changing advanced, internal states of a IVideoDriver.">IMaterialRendererServices</a> interface. Pass a pointer to this class to one of the methods in <a class="el" href="classirr_1_1video_1_1_i_g_p_u_programming_services.html" title="Interface making it possible to create and use programs running on the GPU.">IGPUProgrammingServices</a> when creating a shader. The OnSetConstants method will now be called every time before geometry is being drawn using your shader material. A sample implementation would look like this: </p> <div class="fragment"><pre class="fragment"> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classirr_1_1video_1_1_i_shader_constant_set_call_back.html#a91cf4eb8d20d278defaca4e3c9390396" title="Called by the engine when the vertex and/or pixel shader constants for an material renderer should be...">OnSetConstants</a>(video::IMaterialRendererServices* services, <a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> userData) { video::IVideoDriver* driver = services->getVideoDriver(); <span class="comment">// set clip matrix at register 4</span> <a class="code" href="namespaceirr_1_1core.html#a73fa92e638c5ca97efd72da307cc9b65" title="Typedef for f32 matrix.">core::matrix4</a> worldViewProj(driver->getTransform(<a class="code" href="namespaceirr_1_1video.html#a15b57657a320243be03ae6f66fcff43dae7ec186418508c67a7562af012d7b63f" title="Projection transformation.">video::ETS_PROJECTION</a>)); worldViewProj *= driver->getTransform(<a class="code" href="namespaceirr_1_1video.html#a15b57657a320243be03ae6f66fcff43da152f4262d5874186e0288934c7d31e14" title="View transformation.">video::ETS_VIEW</a>); worldViewProj *= driver->getTransform(<a class="code" href="namespaceirr_1_1video.html#a15b57657a320243be03ae6f66fcff43da843cf42adb3fa9caf61c9e228cf14e85" title="World transformation.">video::ETS_WORLD</a>); services->setVertexShaderConstant(&worldViewProj.M[0], 4, 4); <span class="comment">// for high level shading languages, this would be another solution:</span> <span class="comment">//services->setVertexShaderConstant("mWorldViewProj", worldViewProj.M, 16);</span> <span class="comment">// set some light color at register 9</span> video::SColorf col(0.0f,1.0f,1.0f,0.0f); services->setVertexShaderConstant(reinterpret_cast<const f32*>(&col), 9, 1); <span class="comment">// for high level shading languages, this would be another solution:</span> <span class="comment">//services->setVertexShaderConstant("myColor", reinterpret_cast<f32*>(&col), 4);</span> } </pre></div> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">services,:</td><td>Pointer to an interface providing methods to set the constants for the shader. </td></tr> <tr><td class="paramname">userData,:</td><td>Userdata int which can be specified when creating the shader. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="a837ad9419ca4c17b011af75bb24e7a72"></a><!-- doxytag: member="irr::video::IShaderConstantSetCallBack::OnSetMaterial" ref="a837ad9419ca4c17b011af75bb24e7a72" args="(const SMaterial &material)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">virtual void irr::video::IShaderConstantSetCallBack::OnSetMaterial </td> <td>(</td> <td class="paramtype">const <a class="el" href="classirr_1_1video_1_1_s_material.html">SMaterial</a> & </td> <td class="paramname"><em>material</em></td><td>)</td> <td><code> [inline, virtual]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Called to let the callBack know the used material (optional method) </p> <div class="fragment"><pre class="fragment"> <span class="keyword">class </span>MyCallBack : <span class="keyword">public</span> IShaderConstantSetCallBack { <span class="keyword">const</span> video::SMaterial *UsedMaterial; <a class="code" href="classirr_1_1video_1_1_i_shader_constant_set_call_back.html#a837ad9419ca4c17b011af75bb24e7a72" title="Called to let the callBack know the used material (optional method)">OnSetMaterial</a>(<span class="keyword">const</span> video::SMaterial& material) { UsedMaterial=&material; } <a class="code" href="classirr_1_1video_1_1_i_shader_constant_set_call_back.html#a91cf4eb8d20d278defaca4e3c9390396" title="Called by the engine when the vertex and/or pixel shader constants for an material renderer should be...">OnSetConstants</a>(IMaterialRendererServices* services, <a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> userData) { services->setVertexShaderConstant(<span class="stringliteral">"myColor"</span>, reinterpret_cast<f32*>(&UsedMaterial->color), 4); } } </pre></div> <p>Definition at line <a class="el" href="_i_shader_constant_set_call_back_8h_source.html#l00044">44</a> of file <a class="el" href="_i_shader_constant_set_call_back_8h_source.html">IShaderConstantSetCallBack.h</a>.</p> </div> </div> <hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="_i_shader_constant_set_call_back_8h_source.html">IShaderConstantSetCallBack.h</a></li> </ul> </div> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="namespaceirr.html">irr</a> </li> <li class="navelem"><a class="el" href="namespaceirr_1_1video.html">video</a> </li> <li class="navelem"><a class="el" href="classirr_1_1video_1_1_i_shader_constant_set_call_back.html">IShaderConstantSetCallBack</a> </li> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Friends</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Defines</a></div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <li class="footer"> <a href="http://irrlicht.sourceforge.net" target="_blank">Irrlicht Engine</a> Documentation © 2003-2012 by Nikolaus Gebhardt. 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