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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>height_map.cpp</h1><a href="height__map_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 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="height__map_8h.html">nel/3d/height_map.h</a>"</font> +00029 +00030 +00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC; +00032 +00033 +00034 <font class="keyword">namespace </font>NL3D +00035 { +00036 +00037 +00038 <font class="comment">// ***************************************************************************</font> +<a name="l00039"></a><a class="code" href="classNL3D_1_1CHeightMap.html#a1">00039</a> <font class="keywordtype">void</font> CHeightMap::resize(uint <a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>, uint h) +00040 { +00041 <a class="code" href="height__map_8h.html#a0">NL3D_MEM_HMAP</a> +00042 <a class="code" href="classNL3D_1_1CHeightMap.html#o0">_Width</a>= <a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>; +00043 <a class="code" href="classNL3D_1_1CHeightMap.html#o1">_Height</a>= h; +00044 <a class="code" href="classNL3D_1_1CHeightMap.html#m0">Heights</a>.resize(<a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>*h); +00045 } +00046 +00047 +00048 <font class="comment">// ***************************************************************************</font> +<a name="l00049"></a><a class="code" href="classNL3D_1_1CHeightMap.html#a5">00049</a> <font class="keywordtype">void</font> CHeightMap::buildFromBitmap(<font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CBitmap.html">NLMISC::CBitmap</a> &bitmap0) +00050 { +00051 <a class="code" href="height__map_8h.html#a0">NL3D_MEM_HMAP</a> +00052 <font class="comment">// copy bitmap.</font> +00053 CBitmap bitmap= bitmap0; +00054 <font class="comment">// convert to luminance.</font> +00055 bitmap.<a class="code" href="classNLMISC_1_1CBitmap.html#a4">convertToType</a>(CBitmap::Luminance); +00056 +00057 <font class="comment">// resize array.</font> +00058 uint <a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>, h; +00059 <a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>= bitmap.getWidth(); +00060 h= bitmap.getHeight(); +00061 <a class="code" href="classNL3D_1_1CHeightMap.html#a1">resize</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>,h); +00062 +00063 <font class="comment">// get luminance image.</font> +00064 std::vector<uint8> &array= bitmap.getPixels(); +00065 <font class="comment">// invert the image in Y.</font> +00066 <font class="keywordflow">for</font>(uint <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>=0;<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a><h;<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>++) +00067 { +00068 <font class="keywordflow">for</font>(uint <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>=0;<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a><<a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>;<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>++) +00069 { +00070 uint8 <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>= array[(h-1-<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>)*<a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>]; +00071 <a class="code" href="classNL3D_1_1CHeightMap.html#m0">Heights</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*<a class="code" href="driver__opengl__extension__def_8h.html#a367">w</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>]= <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>; +00072 } +00073 } +00074 } +00075 +00076 +00077 <font class="comment">// ***************************************************************************</font> +<a name="l00078"></a><a class="code" href="classNL3D_1_1CHeightMap.html#a4">00078</a> <font class="keywordtype">float</font> CHeightMap::getZ(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>)<font class="keyword"> const</font> +00079 <font class="keyword"></font>{ +00080 <a class="code" href="height__map_8h.html#a0">NL3D_MEM_HMAP</a> +00081 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a><<a class="code" href="classNL3D_1_1CHeightMap.html#o0">_Width</a> && <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a><<a class="code" href="classNL3D_1_1CHeightMap.html#o1">_Height</a>); +00082 <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CHeightMap.html#m0">Heights</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>*<a class="code" href="classNL3D_1_1CHeightMap.html#o0">_Width</a>+<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>]*<a class="code" href="classNL3D_1_1CHeightMap.html#m5">MaxZ</a>/255; +00083 } +00084 +00085 +00086 +00087 } <font class="comment">// NL3D</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |