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| author | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
|---|---|---|
| committer | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
| commit | 0ea5fc66924303d1bf73ba283a383e2aadee02f2 (patch) | |
| tree | 2568e71a7ccc44ec23b8bb3f0ff97fb6bf2ed709 /docs/doxygen/nel/plane_8cpp-source.html | |
| download | nevrax-website-self-hostable-0ea5fc66924303d1bf73ba283a383e2aadee02f2.tar.xz nevrax-website-self-hostable-0ea5fc66924303d1bf73ba283a383e2aadee02f2.zip | |
Initial commit
Diffstat (limited to '')
| -rw-r--r-- | docs/doxygen/nel/plane_8cpp-source.html | 241 |
1 files changed, 241 insertions, 0 deletions
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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>plane.cpp</h1><a href="plane_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2000 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="stdmisc_8h.html">stdmisc.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="plane_8h.html">nel/misc/plane.h</a>"</font> +00029 +00030 +00031 <font class="keyword">namespace </font>NLMISC +00032 { +00033 +00034 +00035 <font class="comment">//============================================================</font> +<a name="l00036"></a><a class="code" href="classNLMISC_1_1CPlane.html#z305_0">00036</a> <font class="keywordtype">void</font> CPlane::make(<font class="keyword">const</font> CVector &normal, <font class="keyword">const</font> CVector &p) +00037 { +00038 CVector <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>= normal.normed(); +00039 <a class="code" href="classNLMISC_1_1CPlane.html#m0">a</a>= <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>.x; +00040 <a class="code" href="classNLMISC_1_1CPlane.html#m1">b</a>= <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>.y; +00041 <a class="code" href="classNLMISC_1_1CPlane.html#m2">c</a>= <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>.z; +00042 <a class="code" href="classNLMISC_1_1CPlane.html#m3">d</a>=-(<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>*p); <font class="comment">// d=- (ax+by+cz).</font> +00043 } +<a name="l00044"></a><a class="code" href="classNLMISC_1_1CPlane.html#z305_1">00044</a> <font class="keywordtype">void</font> CPlane::make(<font class="keyword">const</font> CVector &p0, <font class="keyword">const</font> CVector &p1, <font class="keyword">const</font> CVector &p2) +00045 { +00046 CVector <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>; +00047 +00048 <a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>=(p1-p0)^(p2-p1); +00049 <a class="code" href="classNLMISC_1_1CPlane.html#z305_0">make</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>,p1); +00050 } +00051 +00052 +00053 <font class="comment">//============================================================</font> +<a name="l00054"></a><a class="code" href="classNLMISC_1_1CPlane.html#z306_4">00054</a> <font class="keywordtype">bool</font> CPlane::clipSegmentBack(CVector &p0, CVector &p1)<font class="keyword"> const</font> +00055 <font class="keyword"></font>{ +00056 <font class="keywordtype">float</font> d0,d1,decal; +00057 CVector proj; +00058 +00059 d0= (*this)*p0; +00060 d1= (*this)*p1; +00061 <font class="keywordflow">if</font>(d0<0 && d1<0) +00062 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00063 <font class="keywordflow">if</font>(d0>=0 && d1>=0) +00064 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00065 <font class="comment">// Clip line.</font> +00066 decal= (0-d0) / (d1-d0); +00067 proj= p0+ (p1-p0)*decal; +00068 <font class="keywordflow">if</font>(d0>=0) +00069 p0=proj; +00070 <font class="keywordflow">else</font> +00071 p1=proj; +00072 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00073 } +<a name="l00074"></a><a class="code" href="classNLMISC_1_1CPlane.html#z306_5">00074</a> <font class="keywordtype">bool</font> CPlane::clipSegmentFront(CVector &p0, CVector &p1)<font class="keyword"> const</font> +00075 <font class="keyword"></font>{ +00076 <font class="keywordtype">float</font> d0,d1,decal; +00077 CVector proj; +00078 +00079 d0= (*this)*p0; +00080 d1= (*this)*p1; +00081 <font class="keywordflow">if</font>(d0>=0 && d1>=0) +00082 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00083 <font class="keywordflow">if</font>(d0<0 && d1<0) +00084 <font class="keywordflow">return</font> <font class="keyword">false</font>; +00085 <font class="comment">// Clip line.</font> +00086 decal= (0-d0) / (d1-d0); +00087 proj= p0+ (p1-p0)*decal; +00088 <font class="keywordflow">if</font>(d0<0) +00089 p0=proj; +00090 <font class="keywordflow">else</font> +00091 p1=proj; +00092 <font class="keywordflow">return</font> <font class="keyword">true</font>; +00093 } +00094 +00095 +00096 <font class="comment">//============================================================</font> +<a name="l00097"></a><a class="code" href="classNLMISC_1_1CPlane.html#z306_6">00097</a> sint CPlane::clipPolygonBack(CVector <a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[], CVector out[], sint nIn)<font class="keyword"> const</font> +00098 <font class="keyword"></font>{ +00099 sint nOut=0,<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>,p,i; +00100 <font class="keywordflow">if</font>(nIn<=2) <font class="keywordflow">return</font> 0; +00101 +00102 <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>=nIn-1; +00103 +00104 <font class="keywordflow">for</font> (i=0;i<nIn;i++) +00105 { +00106 p=i; +00107 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p] < 0 ) +00108 { +00109 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>] > 0 ) +00110 out[nOut++]= <a class="code" href="classNLMISC_1_1CPlane.html#z306_2">intersect</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>],<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]); +00111 out[nOut++]=<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]; +00112 } +00113 <font class="keywordflow">else</font> +00114 { +00115 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>] < 0 ) +00116 out[nOut++]= <a class="code" href="classNLMISC_1_1CPlane.html#z306_2">intersect</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>],<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]); +00117 } +00118 <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>=p; +00119 } +00120 +00121 <font class="keywordflow">return</font> nOut; +00122 } +00123 +00124 <font class="comment">//============================================================</font> +<a name="l00125"></a><a class="code" href="classNLMISC_1_1CPlane.html#z306_7">00125</a> sint CPlane::clipPolygonFront(CVector <a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[], CVector out[], sint nIn)<font class="keyword"> const</font> +00126 <font class="keyword"></font>{ +00127 sint nOut=0,<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>,p,i; +00128 <font class="keywordflow">if</font>(nIn<=2) <font class="keywordflow">return</font> 0; +00129 +00130 <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>=nIn-1; +00131 +00132 <font class="keywordflow">for</font> (i=0;i<nIn;i++) +00133 { +00134 p=i; +00135 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p] > 0 ) +00136 { +00137 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>] < 0 ) +00138 out[nOut++]= <a class="code" href="classNLMISC_1_1CPlane.html#z306_2">intersect</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>],<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]); +00139 out[nOut++]=<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]; +00140 } +00141 <font class="keywordflow">else</font> +00142 { +00143 <font class="keywordflow">if</font> ( (*this)*<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>] > 0 ) +00144 out[nOut++]= <a class="code" href="classNLMISC_1_1CPlane.html#z306_2">intersect</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>],<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>[p]); +00145 } +00146 <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>=p; +00147 } +00148 +00149 <font class="keywordflow">return</font> nOut; +00150 } +00151 +00152 +00153 <font class="comment">//============================================================</font> +<a name="l00154"></a><a class="code" href="classNLMISC_1_1CPlane.html#z307_0">00154</a> CPlane CPlane::inverted()<font class="keyword"> const</font> +00155 <font class="keyword"></font>{ +00156 <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CPlane.html#z304_0">CPlane</a>(-<a class="code" href="classNLMISC_1_1CPlane.html#m0">a</a>, -<a class="code" href="classNLMISC_1_1CPlane.html#m1">b</a>, -<a class="code" href="classNLMISC_1_1CPlane.html#m2">c</a>, -<a class="code" href="classNLMISC_1_1CPlane.html#m3">d</a>); +00157 } +00158 +00159 <font class="comment">//============================================================</font> +<a name="l00160"></a><a class="code" href="classNLMISC_1_1CPlane.html#z307_1">00160</a> <font class="keywordtype">void</font> CPlane::invert() +00161 { +00162 <a class="code" href="classNLMISC_1_1CPlane.html#m0">a</a> = -<a class="code" href="classNLMISC_1_1CPlane.html#m0">a</a>; +00163 <a class="code" href="classNLMISC_1_1CPlane.html#m1">b</a> = -<a class="code" href="classNLMISC_1_1CPlane.html#m1">b</a>; +00164 <a class="code" href="classNLMISC_1_1CPlane.html#m2">c</a> = -<a class="code" href="classNLMISC_1_1CPlane.html#m2">c</a>; +00165 <a class="code" href="classNLMISC_1_1CPlane.html#m3">d</a> = -<a class="code" href="classNLMISC_1_1CPlane.html#m3">d</a>; +00166 } +00167 +00168 +00169 +00170 +00171 } +00172 +</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> |