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<div class="title">gl_utils.h</div> </div>
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<a href="gl__utils_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* +---------------------------------------------------------------------------+</span>
<a name="l00002"></a>00002 <span class="comment"> | The Mobile Robot Programming Toolkit (MRPT) C++ library |</span>
<a name="l00003"></a>00003 <span class="comment"> | |</span>
<a name="l00004"></a>00004 <span class="comment"> | http://www.mrpt.org/ |</span>
<a name="l00005"></a>00005 <span class="comment"> | |</span>
<a name="l00006"></a>00006 <span class="comment"> | Copyright (C) 2005-2011 University of Malaga |</span>
<a name="l00007"></a>00007 <span class="comment"> | |</span>
<a name="l00008"></a>00008 <span class="comment"> | This software was written by the Machine Perception and Intelligent |</span>
<a name="l00009"></a>00009 <span class="comment"> | Robotics Lab, University of Malaga (Spain). |</span>
<a name="l00010"></a>00010 <span class="comment"> | Contact: Jose-Luis Blanco <jlblanco@ctima.uma.es> |</span>
<a name="l00011"></a>00011 <span class="comment"> | |</span>
<a name="l00012"></a>00012 <span class="comment"> | This file is part of the MRPT project. |</span>
<a name="l00013"></a>00013 <span class="comment"> | |</span>
<a name="l00014"></a>00014 <span class="comment"> | MRPT is free software: you can redistribute it and/or modify |</span>
<a name="l00015"></a>00015 <span class="comment"> | it under the terms of the GNU General Public License as published by |</span>
<a name="l00016"></a>00016 <span class="comment"> | the Free Software Foundation, either version 3 of the License, or |</span>
<a name="l00017"></a>00017 <span class="comment"> | (at your option) any later version. |</span>
<a name="l00018"></a>00018 <span class="comment"> | |</span>
<a name="l00019"></a>00019 <span class="comment"> | MRPT is distributed in the hope that it will be useful, |</span>
<a name="l00020"></a>00020 <span class="comment"> | but WITHOUT ANY WARRANTY; without even the implied warranty of |</span>
<a name="l00021"></a>00021 <span class="comment"> | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |</span>
<a name="l00022"></a>00022 <span class="comment"> | GNU General Public License for more details. |</span>
<a name="l00023"></a>00023 <span class="comment"> | |</span>
<a name="l00024"></a>00024 <span class="comment"> | You should have received a copy of the GNU General Public License |</span>
<a name="l00025"></a>00025 <span class="comment"> | along with MRPT. If not, see <http://www.gnu.org/licenses/>. |</span>
<a name="l00026"></a>00026 <span class="comment"> | |</span>
<a name="l00027"></a>00027 <span class="comment"> +---------------------------------------------------------------------------+ */</span>
<a name="l00028"></a>00028 <span class="preprocessor">#ifndef opengl_glutils_H</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define opengl_glutils_H</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="utils__defs_8h.html">mrpt/utils/utils_defs.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="opengl__fonts_8h.html">mrpt/opengl/opengl_fonts.h</a>></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#ifndef opengl_CRenderizable_H</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor"># include <<a class="code" href="_c_renderizable_8h.html">mrpt/opengl/CRenderizable.h</a>></span>
<a name="l00036"></a>00036 <span class="preprocessor">#endif</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <<a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html">mrpt/opengl/link_pragmas.h</a>></span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">namespace </span>mrpt
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="keyword">namespace </span>opengl
<a name="l00043"></a>00043 {<span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment"> /** A set of auxiliary functions that can be called to render OpenGL primitives from MRPT or user code</span>
<a name="l00045"></a>00045 <span class="comment"> * \ingroup mrpt_opengl_grp</span>
<a name="l00046"></a>00046 <span class="comment"> */</span>
<a name="l00047"></a><a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html">00047</a> <span class="keyword">namespace </span>gl_utils
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment"> /** @name Data types for mrpt::opengl::gl_utils</span>
<a name="l00051"></a>00051 <span class="comment"> @{ */</span>
<a name="l00052"></a>00052 <span class="comment"></span>
<a name="l00053"></a>00053 <span class="comment"> /** Information about the rendering process being issued. \sa See getCurrentRenderingInfo for more details */</span>
<a name="l00054"></a>00054 <span class="keyword">struct </span><a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> TRenderInfo
<a name="l00055"></a>00055 {
<a name="l00056"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a5cf505a0d9e777c2cae52b25557a54b1">00056</a> <span class="keywordtype">int</span> vp_x, <a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a5cf505a0d9e777c2cae52b25557a54b1">vp_y</a>, vp_width, vp_height; <span class="comment">//!< Rendering viewport geometry (in pixels)</span>
<a name="l00057"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a1a53137ea405d91dab5803be318a4732">00057</a> <span class="comment"></span> Eigen::Matrix<float,4,4,Eigen::ColMajor> <a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a1a53137ea405d91dab5803be318a4732" title="The 4x4 projection matrix.">proj_matrix</a>; <span class="comment">//!< The 4x4 projection matrix</span>
<a name="l00058"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a7ad4c97ed57a80515462af449bbe270a">00058</a> <span class="comment"></span> Eigen::Matrix<float,4,4,Eigen::ColMajor> <a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a7ad4c97ed57a80515462af449bbe270a" title="The 4x4 model transformation matrix.">model_matrix</a>; <span class="comment">//!< The 4x4 model transformation matrix</span>
<a name="l00059"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a8f7de23315b40f662c7c42cf0285b4f5">00059</a> <span class="comment"></span> Eigen::Matrix<float,4,4,Eigen::ColMajor> <a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a8f7de23315b40f662c7c42cf0285b4f5" title="PROJ * MODEL.">full_matrix</a>; <span class="comment">//!< PROJ * MODEL</span>
<a name="l00060"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a3762c0bf234341094035c8d3fae77d6d">00060</a> <span class="comment"></span> mrpt<a class="code" href="structmrpt_1_1math_1_1_t_point3_df.html" title="Lightweight 3D point (float version).">::math::TPoint3Df</a> <a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a3762c0bf234341094035c8d3fae77d6d" title="The 3D location of the camera.">camera_position</a>; <span class="comment">//!< The 3D location of the camera</span>
<a name="l00061"></a>00061 <span class="comment"></span><span class="comment"></span>
<a name="l00062"></a>00062 <span class="comment"> /** Computes the normalized coordinates (range=[0,1]) on the current rendering viewport of a</span>
<a name="l00063"></a>00063 <span class="comment"> * point with local coordinates (wrt to the current model matrix) of (x,y,z).</span>
<a name="l00064"></a>00064 <span class="comment"> * The output proj_z_depth is the real distance from the eye to the point.</span>
<a name="l00065"></a>00065 <span class="comment"> */</span>
<a name="l00066"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a93fd7bba02ca8e085e4813297bf17218">00066</a> <span class="keywordtype">void</span> projectPoint(<span class="keywordtype">float</span> x,<span class="keywordtype">float</span> <a class="code" href="namespace_eigen_1_1internal.html#a3d7a581aeb951248dc6fe114e9e05f07">y</a>,<span class="keywordtype">float</span> z, <span class="keywordtype">float</span> &proj_x, <span class="keywordtype">float</span> &proj_y, <span class="keywordtype">float</span> &proj_z_depth)<span class="keyword"> const</span>
<a name="l00067"></a>00067 <span class="keyword"> </span>{
<a name="l00068"></a>00068 <span class="keyword">const</span> Eigen::Matrix<float,4,1,Eigen::ColMajor> proj = full_matrix * Eigen::Matrix<float,4,1,Eigen::ColMajor>(x,<a class="code" href="namespace_eigen_1_1internal.html#a3d7a581aeb951248dc6fe114e9e05f07">y</a>,z,1);
<a name="l00069"></a>00069 proj_x = proj[3] ? proj[0]/proj[3] : 0;
<a name="l00070"></a>00070 proj_y = proj[3] ? proj[1]/proj[3] : 0;
<a name="l00071"></a>00071 proj_z_depth = proj[2];
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 <span class="comment"></span>
<a name="l00074"></a>00074 <span class="comment"> /** Exactly like projectPoint but the (x,y) projected coordinates are given in pixels instead of normalized coordinates. */</span>
<a name="l00075"></a><a class="code" href="structmrpt_1_1opengl_1_1gl__utils_1_1_t_render_info.html#a1bb3cac4455a3f8e6e912c596fb168ff">00075</a> <span class="keywordtype">void</span> projectPointPixels(<span class="keywordtype">float</span> x,<span class="keywordtype">float</span> <a class="code" href="namespace_eigen_1_1internal.html#a3d7a581aeb951248dc6fe114e9e05f07">y</a>,<span class="keywordtype">float</span> z, <span class="keywordtype">float</span> &proj_x_px, <span class="keywordtype">float</span> &proj_y_px, <span class="keywordtype">float</span> &proj_z_depth)<span class="keyword"> const</span>
<a name="l00076"></a>00076 <span class="keyword"> </span>{
<a name="l00077"></a>00077 projectPoint(x,y,z,proj_x_px,proj_y_px,proj_z_depth);
<a name="l00078"></a>00078 proj_x_px = (proj_x_px+1.0f)*(vp_width/2);
<a name="l00079"></a>00079 proj_y_px = (proj_y_px+1.0f)*(vp_height/2);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081 };
<a name="l00082"></a>00082 <span class="comment"></span>
<a name="l00083"></a>00083 <span class="comment"> /** @} */</span> <span class="comment">// -----------------------------------------------------</span>
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment"></span>
<a name="l00086"></a>00086 <span class="comment"> /** @name Miscellaneous rendering methods</span>
<a name="l00087"></a>00087 <span class="comment"> @{ */</span>
<a name="l00088"></a>00088 <span class="comment"></span>
<a name="l00089"></a>00089 <span class="comment"> /** For each object in the list:</span>
<a name="l00090"></a>00090 <span class="comment"> * - checks visibility of each object</span>
<a name="l00091"></a>00091 <span class="comment"> * - prepare the GL_MODELVIEW matrix according to its coordinates</span>
<a name="l00092"></a>00092 <span class="comment"> * - call its ::render()</span>
<a name="l00093"></a>00093 <span class="comment"> * - shows its name (if enabled).</span>
<a name="l00094"></a>00094 <span class="comment"> *</span>
<a name="l00095"></a>00095 <span class="comment"> * \note Used by COpenGLViewport, CSetOfObjects</span>
<a name="l00096"></a>00096 <span class="comment"> */</span>
<a name="l00097"></a>00097 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a6f44cd8895c79190cc855902bdbd1647" title="For each object in the list:">renderSetOfObjects</a>(<span class="keyword">const</span> <a class="code" href="classstd_1_1deque.html">mrpt::opengl::CListOpenGLObjects</a> &objs);
<a name="l00098"></a>00098 <span class="comment"></span>
<a name="l00099"></a>00099 <span class="comment"> /** Checks glGetError and throws an exception if an error situation is found */</span>
<a name="l00100"></a>00100 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a364a7dbde49db4815f8b930d4114871a" title="Checks glGetError and throws an exception if an error situation is found.">checkOpenGLError</a>();
<a name="l00101"></a>00101 <span class="comment"></span>
<a name="l00102"></a>00102 <span class="comment"> /** Can be used by derived classes to draw a triangle with a normal vector computed automatically - to be called within a glBegin()-glEnd() block. */</span>
<a name="l00103"></a>00103 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a463454f7058a13593aeb1c78713a2dc6" title="Can be used by derived classes to draw a triangle with a normal vector computed automatically - to be...">renderTriangleWithNormal</a>( <span class="keyword">const</span> <a class="code" href="structmrpt_1_1math_1_1_t_point3_d.html" title="Lightweight 3D point.">mrpt::math::TPoint3D</a> &p1,<span class="keyword">const</span> <a class="code" href="structmrpt_1_1math_1_1_t_point3_d.html" title="Lightweight 3D point.">mrpt::math::TPoint3D</a> &p2,<span class="keyword">const</span> <a class="code" href="structmrpt_1_1math_1_1_t_point3_d.html" title="Lightweight 3D point.">mrpt::math::TPoint3D</a> &p3 );
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment"></span>
<a name="l00106"></a>00106 <span class="comment"> /** Gather useful information on the render parameters.</span>
<a name="l00107"></a>00107 <span class="comment"> * It can be called from within the render() method of CRenderizable-derived classes, and</span>
<a name="l00108"></a>00108 <span class="comment"> * the returned matrices can be used to determine whether a given point (lx,ly,lz)</span>
<a name="l00109"></a>00109 <span class="comment"> * in local coordinates wrt the object being rendered falls within the screen or not:</span>
<a name="l00110"></a>00110 <span class="comment"> * \code</span>
<a name="l00111"></a>00111 <span class="comment"> * TRenderInfo ri;</span>
<a name="l00112"></a>00112 <span class="comment"> * getCurrentRenderingInfo(ri);</span>
<a name="l00113"></a>00113 <span class="comment"> * Eigen::Matrix<float,4,4> M= ri.proj_matrix * ri.model_matrix * HomogeneousMatrix(lx,ly,lz);</span>
<a name="l00114"></a>00114 <span class="comment"> * const float rend_x = M(0,3)/M(3,3);</span>
<a name="l00115"></a>00115 <span class="comment"> * const float rend_y = M(1,3)/M(3,3);</span>
<a name="l00116"></a>00116 <span class="comment"> * \endcode</span>
<a name="l00117"></a>00117 <span class="comment"> * where (rend_x,rend_y) are both in the range [-1,1].</span>
<a name="l00118"></a>00118 <span class="comment"> */</span>
<a name="l00119"></a>00119 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#adeeda3c1d38cc177f8bf58b77f2b13e6" title="Gather useful information on the render parameters.">getCurrentRenderingInfo</a>(TRenderInfo &ri);
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="comment"></span>
<a name="l00122"></a>00122 <span class="comment"> /** Draws a message box with a centered (possibly multi-lined) text.</span>
<a name="l00123"></a>00123 <span class="comment"> * It consists of a filled rectangle with a frame around and the centered text in the middle.</span>
<a name="l00124"></a>00124 <span class="comment"> *</span>
<a name="l00125"></a>00125 <span class="comment"> * The appearance of the box is highly configurable via parameters.</span>
<a name="l00126"></a>00126 <span class="comment"> *</span>
<a name="l00127"></a>00127 <span class="comment"> * \param[in] msg_x, msg_y The left-lower corner coordinates, in ratio [0,1] of the viewport size. (0,0) if the left-bottom corner of the viewport.</span>
<a name="l00128"></a>00128 <span class="comment"> * \param[in] msg_w, msg_h The width & height, in ratio [0,1] of the viewport size.</span>
<a name="l00129"></a>00129 <span class="comment"> * \param[in] text The text to display. Multiple lines can be drawn with the '\n' character.</span>
<a name="l00130"></a>00130 <span class="comment"> * \param[in] text_scale Size of characters, in ration [0,1] of the viewport size. Note that this size may be scaled automatically reduced to fit the text withtin the rectangle of the message box.</span>
<a name="l00131"></a>00131 <span class="comment"> * \param[in] back_col Color of the rectangle background. Alpha can be <255 to enable transparency.</span>
<a name="l00132"></a>00132 <span class="comment"> * \param[in] border_col Color of the rectangle frame. Alpha can be <255 to enable transparency.</span>
<a name="l00133"></a>00133 <span class="comment"> * \param[in] text_col Color of the text background. Alpha can be <255 to enable transparency.</span>
<a name="l00134"></a>00134 <span class="comment"> * \param[in] border_width Width of the border, in pixels</span>
<a name="l00135"></a>00135 <span class="comment"> * \param[in] text_font, text_style, text_spacing, text_kerning See mrpt::opengl::gl_utils::glDrawText()</span>
<a name="l00136"></a>00136 <span class="comment"> *</span>
<a name="l00137"></a>00137 <span class="comment"> * Example (see directory: 'samples/display3D_custom_render'):</span>
<a name="l00138"></a>00138 <span class="comment"> *</span>
<a name="l00139"></a>00139 <span class="comment"> * <img src="gl_utils_message_box.jpg" ></span>
<a name="l00140"></a>00140 <span class="comment"> */</span>
<a name="l00141"></a>00141 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#ac879b1d810641376723af2928c9a5a19" title="Draws a message box with a centered (possibly multi-lined) text.">renderMessageBox</a>(
<a name="l00142"></a>00142 <span class="keyword">const</span> <span class="keywordtype">float</span> msg_x, <span class="keyword">const</span> <span class="keywordtype">float</span> msg_y,
<a name="l00143"></a>00143 <span class="keyword">const</span> <span class="keywordtype">float</span> msg_w, <span class="keyword">const</span> <span class="keywordtype">float</span> msg_h,
<a name="l00144"></a>00144 <span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> &text,
<a name="l00145"></a>00145 <span class="keywordtype">float</span> text_scale,
<a name="l00146"></a>00146 <span class="keyword">const</span> <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a> back_col = <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a>(0,0,50, 150),
<a name="l00147"></a>00147 <span class="keyword">const</span> <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a> border_col = <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a>(0,0,0, 140),
<a name="l00148"></a>00148 <span class="keyword">const</span> <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a> text_col = <a class="code" href="structmrpt_1_1utils_1_1_t_color.html" title="A RGB color - 8bit.">mrpt::utils::TColor</a>(255,255,255, 220),
<a name="l00149"></a>00149 <span class="keyword">const</span> <span class="keywordtype">float</span> border_width = 4.0f,
<a name="l00150"></a>00150 <span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> & text_font = <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a>(<span class="stringliteral">"sans"</span>),
<a name="l00151"></a>00151 <a class="code" href="namespacemrpt_1_1opengl.html#a2a3950732480ac3cffe2c391a45fb4ef" title="Different style for vectorized font rendering.">mrpt::opengl::TOpenGLFontStyle</a> text_style = <a class="code" href="namespacemrpt_1_1opengl.html#a2a3950732480ac3cffe2c391a45fb4efac078b23ac8c517cf925bd99352a6c00e" title="renders glyphs as filled polygons">mrpt::opengl::FILL</a>,
<a name="l00152"></a>00152 <span class="keyword">const</span> <span class="keywordtype">double</span> text_spacing = 1.5,
<a name="l00153"></a>00153 <span class="keyword">const</span> <span class="keywordtype">double</span> text_kerning = 0.1
<a name="l00154"></a>00154 );
<a name="l00155"></a>00155 <span class="comment"></span>
<a name="l00156"></a>00156 <span class="comment"> /** @} */</span> <span class="comment">// -----------------------------------------------------</span>
<a name="l00157"></a>00157 <span class="comment"></span>
<a name="l00158"></a>00158 <span class="comment"> /** @name OpenGL bitmapped 2D fonts</span>
<a name="l00159"></a>00159 <span class="comment"> @{ */</span>
<a name="l00160"></a>00160 <span class="comment"></span>
<a name="l00161"></a>00161 <span class="comment"> /** This method is safe for calling from within ::render() methods \sa renderTextBitmap */</span>
<a name="l00162"></a>00162 <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a765b951c5dfac68de0300b0884327444" title="This method is safe for calling from within ::render() methods.">renderTextBitmap</a>( <span class="keyword">const</span> <span class="keywordtype">char</span> *str, <span class="keywordtype">void</span> *fontStyle );
<a name="l00163"></a>00163 <span class="comment"></span>
<a name="l00164"></a>00164 <span class="comment"> /** Return the exact width in pixels for a given string, as will be rendered by renderTextBitmap().</span>
<a name="l00165"></a>00165 <span class="comment"> * \sa renderTextBitmap</span>
<a name="l00166"></a>00166 <span class="comment"> */</span>
<a name="l00167"></a>00167 <span class="keywordtype">int</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a9eaa1ac5fcd5347d6a34f257a20bb5db" title="Return the exact width in pixels for a given string, as will be rendered by renderTextBitmap().">textBitmapWidth</a>(
<a name="l00168"></a>00168 <span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> &str,
<a name="l00169"></a>00169 <a class="code" href="group__mrpt__opengl__grp.html#ga4e54252970d0b0a6dd251335064a2346" title="Existing fonts for 2D texts in mrpt::opengl methods.">mrpt::opengl::TOpenGLFont</a> font = <a class="code" href="group__mrpt__opengl__grp.html#gga4e54252970d0b0a6dd251335064a2346a31ebbbe2889bcca4760b90bba40385b8">mrpt::opengl::MRPT_GLUT_BITMAP_TIMES_ROMAN_24</a> );
<a name="l00170"></a>00170 <span class="comment"></span>
<a name="l00171"></a>00171 <span class="comment"> /** @} */</span> <span class="comment">// --------------------------------------------------</span>
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="comment"></span>
<a name="l00174"></a>00174 <span class="comment"> /** @name OpenGL vector 3D fonts</span>
<a name="l00175"></a>00175 <span class="comment"> @{ */</span>
<a name="l00176"></a>00176 <span class="comment"></span>
<a name="l00177"></a>00177 <span class="comment"> /// sets the font to use for future font rendering commands. currently sans, serif and mono are available.</span>
<a name="l00178"></a>00178 <span class="comment"> /// @param fontname string containing font name</span>
<a name="l00179"></a>00179 <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a2fea889ffc3bd42283ce9cd4c922f2ca" title="sets the font to use for future font rendering commands.">glSetFont</a>( <span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> & fontname );
<a name="l00180"></a>00180 <span class="comment"></span>
<a name="l00181"></a>00181 <span class="comment"> /// returns the name of the currently active font</span>
<a name="l00182"></a>00182 <span class="comment"></span> <span class="keyword">const</span> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> std<a class="code" href="classstd_1_1string.html" title="STL class.">::string</a> & <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#ad0749707fbbc6831fa7bf3b7fdb07b09" title="returns the name of the currently active font">glGetFont</a>();
<a name="l00183"></a>00183 <span class="comment"></span>
<a name="l00184"></a>00184 <span class="comment"> /// renders a string in GL using the current settings.</span>
<a name="l00185"></a>00185 <span class="comment"> /// Font coordinates are +X along the line and +Y along the up direction of glyphs.</span>
<a name="l00186"></a>00186 <span class="comment"> /// The origin is at the top baseline at the left of the first character. Characters have a maximum size of 1.</span>
<a name="l00187"></a>00187 <span class="comment"> /// linefeed is interpreted as a new line and the start is offset in -Y direction by @ref spacing . Individual characters</span>
<a name="l00188"></a>00188 <span class="comment"> /// are separated by @ref kerning + plus their individual with.</span>
<a name="l00189"></a>00189 <span class="comment"> /// @param text string to be rendered, unknown characters are replaced with '?'</span>
<a name="l00190"></a>00190 <span class="comment"> /// @param textScale The size of the characters (default=1.0)</span>
<a name="l00191"></a>00191 <span class="comment"> /// @param style rendering style</span>
<a name="l00192"></a>00192 <span class="comment"> /// @param spacing distance between individual text lines</span>
<a name="l00193"></a>00193 <span class="comment"> /// @param kerning distance between characters</span>
<a name="l00194"></a>00194 <span class="comment"> /// \note This functions comes from libcvd (LGPL, http://www.edwardrosten.com/cvd/ )</span>
<a name="l00195"></a>00195 <span class="comment"></span> mrpt<a class="code" href="structmrpt_1_1utils_1_1_t_pixel_coordf.html" title="A pair (x,y) of pixel coordinates (subpixel resolution).">::utils::TPixelCoordf</a> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#adb0f347e8026263cd05fbe3e56631f5d" title="renders a string in GL using the current settings.">glDrawText</a>(<span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> & text, <span class="keyword">const</span> <span class="keywordtype">double</span> textScale, <span class="keyword">enum</span> <a class="code" href="namespacemrpt_1_1opengl.html#a2a3950732480ac3cffe2c391a45fb4ef" title="Different style for vectorized font rendering.">TOpenGLFontStyle</a> style = <a class="code" href="namespacemrpt_1_1opengl.html#a2a3950732480ac3cffe2c391a45fb4efa60e199cb9a72174613c2b15a385bc6e0" title="renders glyphs filled with antialiased outlines">NICE</a>, <span class="keywordtype">double</span> spacing = 1.5, <span class="keywordtype">double</span> kerning = 0.1);
<a name="l00196"></a>00196 <span class="comment"></span>
<a name="l00197"></a>00197 <span class="comment"> /// returns the size of the bounding box of a text to be rendered, similar to @ref glDrawText but without any visual output</span>
<a name="l00198"></a>00198 <span class="comment"> /// \note This functions comes from libcvd (LGPL, http://www.edwardrosten.com/cvd/ )</span>
<a name="l00199"></a>00199 <span class="comment"></span> mrpt<a class="code" href="structmrpt_1_1utils_1_1_t_pixel_coordf.html" title="A pair (x,y) of pixel coordinates (subpixel resolution).">::utils::TPixelCoordf</a> <a class="code" href="opengl_2include_2mrpt_2opengl_2link__pragmas_8h.html#af6a1c8d5d6b3c8c0af00dbeef88ce269">OPENGL_IMPEXP</a> <a class="code" href="namespacemrpt_1_1opengl_1_1gl__utils.html#a6f47f6cabc200bbea57f76265f024161" title="returns the size of the bounding box of a text to be rendered, similar to glDrawText but without any ...">glGetExtends</a>(<span class="keyword">const</span> <a class="code" href="classstd_1_1string.html" title="STL class.">std::string</a> & text, <span class="keyword">const</span> <span class="keywordtype">double</span> textScale, <span class="keywordtype">double</span> spacing = 1.5, <span class="keywordtype">double</span> kerning = 0.1);
<a name="l00200"></a>00200 <span class="comment"></span>
<a name="l00201"></a>00201 <span class="comment"> /** @} */</span> <span class="comment">// --------------------------------------------------</span>
<a name="l00202"></a>00202
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206
<a name="l00207"></a>00207 <span class="preprocessor">#endif</span>
</pre></div></div>
</div>
<br><hr><br> <table border="0" width="100%"> <tr> <td> Page generated by <a href="http://www.doxygen.org" target="_blank">Doxygen 1.7.5</a> for MRPT 0.9.5 SVN: at Sun Sep 25 17:20:18 UTC 2011</td><td></td> <td width="100"> </td> <td width="150"> </td></tr> </table> </body></html>
