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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>edge_collide.h</h1><a href="edge__collide_8h.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">#ifndef NL_EDGE_COLLIDE_H</font> +00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_EDGE_COLLIDE_H</font> +00028 <font class="preprocessor"></font> +00029 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font> +00030 <font class="preprocessor">#include "<a class="code" href="vector__2f_8h.html">nel/misc/vector_2f.h</a>"</font> +00031 +00032 +00033 <font class="keyword">namespace </font>NLPACS +00034 { +00035 +00036 +00037 <font class="keyword">using</font> <a class="code" href="classNLMISC_1_1CVector2f.html">NLMISC::CVector2f</a>; +00038 +00039 +00040 +00041 <font class="comment">// ***************************************************************************</font> +<a name="l00048"></a><a class="code" href="classNLPACS_1_1CInt128.html">00048</a> <font class="comment"></font><font class="keyword">class </font>CInt128 +00049 { +00050 <font class="keyword">public</font>: +<a name="l00051"></a><a class="code" href="classNLPACS_1_1CInt128.html#m0">00051</a> <a class="code" href="types__nl_8h.html#a10">sint64</a> <a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>; +<a name="l00052"></a><a class="code" href="classNLPACS_1_1CInt128.html#m1">00052</a> <a class="code" href="types__nl_8h.html#a10">sint64</a> <a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a>; +00053 +00054 <font class="keyword">public</font>: +00055 +<a name="l00057"></a><a class="code" href="classNLPACS_1_1CInt128.html#a0">00057</a> <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CInt128.html#a0">setMul</a>(<a class="code" href="types__nl_8h.html#a10">sint64</a> a, <a class="code" href="types__nl_8h.html#a10">sint64</a> b) +00058 { +00059 <font class="comment">// reset and backup sign.</font> +00060 <a class="code" href="types__nl_8h.html#a12">sint</a> sgn=0; +00061 <font class="keywordflow">if</font>(a<0) +00062 sgn++, a=-a; +00063 <font class="keywordflow">if</font>(b<0) +00064 sgn--, b=-b; +00065 +00066 +00067 <font class="comment">// compute unsigned version.</font> +00068 <a class="code" href="types__nl_8h.html#a11">uint64</a> high, low, hl1, hl2, oldLow; +00069 <a class="code" href="types__nl_8h.html#a9">uint32</a> mask32= 0xFFFFFFFF; +00070 high= (a>>32) * (b>>32); +00071 low= (a&mask32) * (b&mask32); +00072 hl1= (a&mask32) * (b>>32); +00073 hl2= (a>>32) * (b&mask32); +00074 <font class="comment">// add/adc hl1.</font> +00075 oldLow= low; +00076 low+= (hl1&mask32) << 32; +00077 <font class="keywordflow">if</font>(low<oldLow) +00078 high++; +00079 high+= (hl1>>32); +00080 <font class="comment">// add/adc hl2.</font> +00081 oldLow= low; +00082 low+= (hl2&mask32) << 32; +00083 <font class="keywordflow">if</font>(low<oldLow) +00084 high++; +00085 high+= (hl2>>32); +00086 +00087 +00088 <font class="comment">// extend with sign.</font> +00089 <a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>= high; +00090 <a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a>= low; +00091 <font class="keywordflow">if</font>(sgn!=0) +00092 { +00093 <a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>= -<a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>; +00094 <a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a>= -<a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a>; +00095 } +00096 } +00097 +<a name="l00099"></a><a class="code" href="classNLPACS_1_1CInt128.html#a1">00099</a> <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CInt128.html#a1">operator<</a>(<font class="keyword">const</font> CInt128 &o)<font class="keyword"> const</font> +00100 <font class="keyword"> </font>{ +00101 <font class="keywordflow">if</font>(<a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>!=o.High) +00102 <font class="keywordflow">return</font> <a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a><o.High; +00103 <font class="keywordflow">else</font> +00104 <font class="keywordflow">return</font> <a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a><o.Low; +00105 } +00106 +<a name="l00108"></a><a class="code" href="classNLPACS_1_1CInt128.html#a2">00108</a> <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CInt128.html#a2">operator==</a>(<font class="keyword">const</font> CInt128 &o)<font class="keyword"> const</font> +00109 <font class="keyword"> </font>{ +00110 <font class="keywordflow">return</font> <a class="code" href="classNLPACS_1_1CInt128.html#m0">High</a>==o.High && <a class="code" href="classNLPACS_1_1CInt128.html#m1">Low</a>==o.Low; +00111 } +00112 +00113 }; +00114 +00115 +00116 <font class="comment">// ***************************************************************************</font> +<a name="l00123"></a><a class="code" href="classNLPACS_1_1CRational64.html">00123</a> <font class="comment"></font><font class="keyword">class </font>CRational64 +00124 { +00125 <font class="keyword">public</font>: +<a name="l00127"></a><a class="code" href="classNLPACS_1_1CRational64.html#m0">00127</a> <a class="code" href="types__nl_8h.html#a10">sint64</a> <a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>; +<a name="l00129"></a><a class="code" href="classNLPACS_1_1CRational64.html#m1">00129</a> <a class="code" href="types__nl_8h.html#a10">sint64</a> <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>; +00130 +00131 +00132 <font class="keyword">public</font>: +00133 +<a name="l00134"></a><a class="code" href="classNLPACS_1_1CRational64.html#a0">00134</a> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a>() {} +<a name="l00135"></a><a class="code" href="classNLPACS_1_1CRational64.html#a1">00135</a> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a>(<a class="code" href="types__nl_8h.html#a10">sint64</a> a) : <a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>(a), <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>(1) {} +<a name="l00136"></a><a class="code" href="classNLPACS_1_1CRational64.html#a2">00136</a> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a>(<a class="code" href="types__nl_8h.html#a10">sint64</a> num, <a class="code" href="types__nl_8h.html#a10">sint64</a> den) +00137 { +00138 <font class="keywordflow">if</font>(den>0) +00139 { +00140 <a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>= num; +00141 <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>= den; +00142 } +00143 <font class="keywordflow">else</font> +00144 { +00145 <a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>= -num; +00146 <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>= -den; +00147 } +00148 } +00149 +<a name="l00151"></a><a class="code" href="classNLPACS_1_1CRational64.html#a3">00151</a> <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CRational64.html#a3">operator<</a>(<font class="keyword">const</font> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a> &o)<font class="keyword"> const</font> +00152 <font class="keyword"> </font>{ +00153 CInt128 n0, n1; +00154 <font class="comment">// a/b < c/d <=> a*d < c*b</font> +00155 n0.setMul(<a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>, o.Denominator); +00156 n1.setMul(o.Numerator, <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>); +00157 <font class="keywordflow">return</font> n0<n1; +00158 } +00159 +<a name="l00161"></a><a class="code" href="classNLPACS_1_1CRational64.html#a4">00161</a> <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CRational64.html#a4">operator==</a>(<font class="keyword">const</font> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a> &o)<font class="keyword"> const</font> +00162 <font class="keyword"> </font>{ +00163 CInt128 n0, n1; +00164 <font class="comment">// a/b == c/d <=> a*d == c*b</font> +00165 n0.setMul(<a class="code" href="classNLPACS_1_1CRational64.html#m0">Numerator</a>, o.Denominator); +00166 n1.setMul(o.Numerator, <a class="code" href="classNLPACS_1_1CRational64.html#m1">Denominator</a>); +00167 <font class="keywordflow">return</font> n0==n1; +00168 } +00169 +00170 }; +00171 +00172 +00173 <font class="comment">// ***************************************************************************</font> +<a name="l00180"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html">00180</a> <font class="comment"></font><font class="keyword">class </font>CEdgeCollide +00181 { +00182 <font class="keyword">public</font>: +<a name="l00183"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6">00183</a> <font class="keyword">enum</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6">TPointMoveProblem</a> {<a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s0">ParallelEdges</a>=0, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s1">StartOnEdge</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s2">StopOnEdge</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s3">TraverseEndPoint</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s4">EdgeNull</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6s5">PointMoveProblemCount</a>}; +00184 +00185 +00186 <font class="keyword">public</font>: +<a name="l00187"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#m0">00187</a> CVector2f <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m0">P0</a>; +<a name="l00188"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#m1">00188</a> CVector2f <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m1">P1</a>; +<a name="l00189"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#m3">00189</a> CVector2f <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m2">Dir</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m3">Norm</a>; +<a name="l00190"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#m5">00190</a> <font class="keywordtype">float</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m4">A0</a>, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m5">A1</a>; +<a name="l00191"></a><a class="code" href="classNLPACS_1_1CEdgeCollide.html#m6">00191</a> <font class="keywordtype">float</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#m6">C</a>; +00192 +00193 <font class="keyword">public</font>: +00194 +00195 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a0">make</a>(<font class="keyword">const</font> CVector2f &p0, <font class="keyword">const</font> CVector2f &p1); +00196 +00204 CRational64 <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a1">testPointMove</a>(<font class="keyword">const</font> CVector2f &start, <font class="keyword">const</font> CVector2f &end, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6">TPointMoveProblem</a> &moveBug); +00209 <font class="keywordtype">float</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a2">testCircleMove</a>(<font class="keyword">const</font> CVector2f &start, <font class="keyword">const</font> CVector2f &delta, <font class="keywordtype">float</font> radius, CVector2f &normal); +00215 <font class="keywordtype">float</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a3">testBBoxMove</a>(<font class="keyword">const</font> CVector2f &start, <font class="keyword">const</font> CVector2f &delta, <font class="keyword">const</font> CVector2f bbox[4], CVector2f &normal); +00220 <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a4">testBBoxCollide</a>(<font class="keyword">const</font> CVector2f bbox[4]); +00221 +00222 +00223 <font class="comment">// ****************************</font> +00224 <font class="keyword">private</font>: +00225 +00229 <font class="keywordtype">bool</font> <a class="code" href="classNLPACS_1_1CEdgeCollide.html#c0">testEdgeMove</a>(<font class="keyword">const</font> CVector2f &q0, <font class="keyword">const</font> CVector2f &q1, <font class="keyword">const</font> CVector2f &delta, <font class="keywordtype">float</font> &tMin, <font class="keywordtype">float</font> &tMax, <font class="keywordtype">bool</font> &normalOnBox); +00230 +00231 }; +00232 +00233 +00234 +00235 } <font class="comment">// NLPACS</font> +00236 +00237 +00238 <font class="preprocessor">#endif // NL_EDGE_COLLIDE_H</font> +00239 <font class="preprocessor"></font> +00240 <font class="comment">/* End of edge_collide.h */</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> |