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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<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>
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