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<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&lt;0)
00062                         sgn++, a=-a;
00063                 <font class="keywordflow">if</font>(b&lt;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&gt;&gt;32) * (b&gt;&gt;32);
00071                 low=  (a&amp;mask32) * (b&amp;mask32);
00072                 hl1=  (a&amp;mask32) * (b&gt;&gt;32);
00073                 hl2=  (a&gt;&gt;32) * (b&amp;mask32);
00074                 <font class="comment">// add/adc hl1.</font>
00075                 oldLow= low;
00076                 low+= (hl1&amp;mask32) &lt;&lt; 32;
00077                 <font class="keywordflow">if</font>(low&lt;oldLow)
00078                         high++;
00079                 high+= (hl1&gt;&gt;32);
00080                 <font class="comment">// add/adc hl2.</font>
00081                 oldLow= low;
00082                 low+= (hl2&amp;mask32) &lt;&lt; 32;
00083                 <font class="keywordflow">if</font>(low&lt;oldLow)
00084                         high++;
00085                 high+= (hl2&gt;&gt;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&lt;</a>(<font class="keyword">const</font> CInt128 &amp;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>&lt;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>&lt;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 &amp;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 &amp;&amp; <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&gt;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&lt;</a>(<font class="keyword">const</font> <a class="code" href="classNLPACS_1_1CRational64.html#a0">CRational64</a> &amp;o)<font class="keyword"> const</font>
00152 <font class="keyword">        </font>{
00153                 CInt128         n0, n1;
00154                 <font class="comment">// a/b &lt; c/d  &lt;=&gt;  a*d &lt; 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&lt;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> &amp;o)<font class="keyword"> const</font>
00162 <font class="keyword">        </font>{
00163                 CInt128         n0, n1;
00164                 <font class="comment">// a/b == c/d  &lt;=&gt;  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 &amp;p0, <font class="keyword">const</font> CVector2f &amp;p1);
00196 
00204         CRational64     <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a1">testPointMove</a>(<font class="keyword">const</font> CVector2f &amp;start, <font class="keyword">const</font> CVector2f &amp;end, <a class="code" href="classNLPACS_1_1CEdgeCollide.html#s6">TPointMoveProblem</a> &amp;moveBug);
00209         <font class="keywordtype">float</font>           <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a2">testCircleMove</a>(<font class="keyword">const</font> CVector2f &amp;start, <font class="keyword">const</font> CVector2f &amp;delta, <font class="keywordtype">float</font> radius, CVector2f &amp;normal);
00215         <font class="keywordtype">float</font>           <a class="code" href="classNLPACS_1_1CEdgeCollide.html#a3">testBBoxMove</a>(<font class="keyword">const</font> CVector2f &amp;start, <font class="keyword">const</font> CVector2f &amp;delta, <font class="keyword">const</font> CVector2f bbox[4], CVector2f &amp;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 &amp;q0, <font class="keyword">const</font> CVector2f &amp;q1, <font class="keyword">const</font> CVector2f &amp;delta, <font class="keywordtype">float</font> &amp;tMin, <font class="keywordtype">float</font> &amp;tMax, <font class="keywordtype">bool</font> &amp;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>

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