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<h1>dox/Filtering/vtkTriangle.h</h1><a href="a02388.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*=========================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Program: Visualization Toolkit</span>
<a name="l00004"></a>00004 <span class="comment"> Module: $RCSfile: vtkTriangle.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen</span>
<a name="l00007"></a>00007 <span class="comment"> All rights reserved.</span>
<a name="l00008"></a>00008 <span class="comment"> See Copyright.txt or http://www.kitware.com/Copyright.htm for details.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even</span>
<a name="l00011"></a>00011 <span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR</span>
<a name="l00012"></a>00012 <span class="comment"> PURPOSE. See the above copyright notice for more information.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">=========================================================================*/</span>
<a name="l00025"></a>00025 <span class="preprocessor">#ifndef __vtkTriangle_h</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span><span class="preprocessor">#define __vtkTriangle_h</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="a02203.html">vtkCell.h</a>"</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="a02073.html">vtkMath.h</a>"</span> <span class="comment">// Needed for inline methods</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keyword">class </span><a class="code" href="a00960.html" title="cell represents a 1D line">vtkLine</a>;
<a name="l00033"></a>00033 <span class="keyword">class </span><a class="code" href="a01443.html" title="evaluate implicit quadric function">vtkQuadric</a>;
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="a01760.html">00035</a> <span class="keyword">class </span><a class="code" href="a02170.html#95ced7977a6b6b1bf9f38bf04e3835b6">VTK_FILTERING_EXPORT</a> <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a> : <span class="keyword">public</span> <a class="code" href="a00240.html" title="abstract class to specify cell behavior">vtkCell</a>
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="keyword">public</span>:
<a name="l00038"></a>00038 <span class="keyword">static</span> <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a> *<a class="code" href="a01084.html#4d5b227267c076d6f9e38483370b6612">New</a>();
<a name="l00039"></a><a class="code" href="a01760.html#9b6cedc6230d85cb31ac7b9dae8f9740">00039</a> vtkTypeRevisionMacro(<a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>,<a class="code" href="a00240.html" title="abstract class to specify cell behavior">vtkCell</a>);
<a name="l00040"></a>00040 <span class="keywordtype">void</span> <a class="code" href="a00240.html#7d667f735a985f378632818be5f7d924">PrintSelf</a>(ostream& os, <a class="code" href="a00869.html" title="a simple class to control print indentation">vtkIndent</a> indent);
<a name="l00041"></a>00041
<a name="l00044"></a>00044 <a class="code" href="a00240.html" title="abstract class to specify cell behavior">vtkCell</a> *<a class="code" href="a00240.html#0a483b81bca4b9509ea13837133ca91f">GetEdge</a>(<span class="keywordtype">int</span> edgeId);
<a name="l00045"></a>00045
<a name="l00047"></a>00047
<a name="l00048"></a><a class="code" href="a01760.html#671fef94b6cedc0e2b4637af3da6f2d4">00048</a> <span class="keywordtype">int</span> <a class="code" href="a00240.html#73c9383a1d9214b55886586c8d894e82">GetCellType</a>() {<span class="keywordflow">return</span> <a class="code" href="a02209.html#b1d6fd1f3177b8a2a32bb018807151f844b37cbcec1ade3dd68953d6f9d9b133">VTK_TRIANGLE</a>;};
<a name="l00049"></a><a class="code" href="a01760.html#d6685e3961d95dfa530712e41388cf1d">00049</a> <span class="keywordtype">int</span> <a class="code" href="a00240.html#422bd7bceb55b0c71245c4d772a0673b">GetCellDimension</a>() {<span class="keywordflow">return</span> 2;};
<a name="l00050"></a><a class="code" href="a01760.html#479e02f397ea00dd1ad04356ca3a1636">00050</a> <span class="keywordtype">int</span> <a class="code" href="a00240.html#119b5ad62e598c8c81acf5c8215371c7">GetNumberOfEdges</a>() {<span class="keywordflow">return</span> 3;};
<a name="l00051"></a><a class="code" href="a01760.html#b684cf2252009e2051550a19f5cb60ce">00051</a> <span class="keywordtype">int</span> <a class="code" href="a00240.html#49cffa6eb0e087f1e53ddf6ac1016a59">GetNumberOfFaces</a>() {<span class="keywordflow">return</span> 0;};
<a name="l00052"></a><a class="code" href="a01760.html#ee642ffb18839ab179be866151aebbf1">00052</a> <a class="code" href="a00240.html" title="abstract class to specify cell behavior">vtkCell</a> *<a class="code" href="a00240.html#11b6ba66e9f7e193b204d478379e32ea">GetFace</a>(<span class="keywordtype">int</span>) {<span class="keywordflow">return</span> 0;};
<a name="l00053"></a>00053 <span class="keywordtype">int</span> <a class="code" href="a00240.html#bba3e9aee8d232137a3f5e846973d3b7">CellBoundary</a>(<span class="keywordtype">int</span> subId, <span class="keywordtype">double</span> pcoords[3], <a class="code" href="a00720.html" title="list of point or cell ids">vtkIdList</a> *pts);
<a name="l00054"></a>00054 <span class="keywordtype">void</span> <a class="code" href="a00240.html#941d585f7ede657219f6d3c9f1acd4d0">Contour</a>(<span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2106bf5e5151797630e91167caab3f22b9a">value</a>, <a class="code" href="a00356.html" title="abstract superclass for arrays of numeric data">vtkDataArray</a> *cellScalars,
<a name="l00055"></a>00055 <a class="code" href="a01247.html" title="quickly locate points in 3-space">vtkPointLocator</a> *locator, <a class="code" href="a00242.html" title="object to represent cell connectivity">vtkCellArray</a> *verts,
<a name="l00056"></a>00056 <a class="code" href="a00242.html" title="object to represent cell connectivity">vtkCellArray</a> *lines, <a class="code" href="a00242.html" title="object to represent cell connectivity">vtkCellArray</a> *polys,
<a name="l00057"></a>00057 <a class="code" href="a01242.html" title="represent and manipulate point attribute data">vtkPointData</a> *inPd, <a class="code" href="a01242.html" title="represent and manipulate point attribute data">vtkPointData</a> *outPd,
<a name="l00058"></a>00058 <a class="code" href="a00245.html" title="represent and manipulate cell attribute data">vtkCellData</a> *inCd, <a class="code" href="a02149.html#20bd6b6dedfe1bbb096c50354d52cc7e">vtkIdType</a> cellId, <a class="code" href="a00245.html" title="represent and manipulate cell attribute data">vtkCellData</a> *outCd);
<a name="l00059"></a>00059 <span class="keywordtype">int</span> <a class="code" href="a00240.html#463203095c011df36980b4677e8825b0">EvaluatePosition</a>(<span class="keywordtype">double</span> x[3], <span class="keywordtype">double</span>* closestPoint,
<a name="l00060"></a>00060 <span class="keywordtype">int</span>& subId, <span class="keywordtype">double</span> pcoords[3],
<a name="l00061"></a>00061 <span class="keywordtype">double</span>& dist2, <span class="keywordtype">double</span> *weights);
<a name="l00062"></a>00062 <span class="keywordtype">void</span> <a class="code" href="a00240.html#3c6627f0a1b6e2e76b058c407c72eadf">EvaluateLocation</a>(<span class="keywordtype">int</span>& subId, <span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> x[3],
<a name="l00063"></a>00063 <span class="keywordtype">double</span> *weights);
<a name="l00064"></a>00064 <span class="keywordtype">int</span> <a class="code" href="a00240.html#fece9607d75536910a3d0b154383d641">Triangulate</a>(<span class="keywordtype">int</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210e519c5019582479480124c44722a451f">index</a>, <a class="code" href="a00720.html" title="list of point or cell ids">vtkIdList</a> *ptIds, <a class="code" href="a01250.html" title="represent and manipulate 3D points">vtkPoints</a> *pts);
<a name="l00065"></a>00065 <span class="keywordtype">void</span> <a class="code" href="a00240.html#ff3d8332e9d7d556a9d2e9f91173d068">Derivatives</a>(<span class="keywordtype">int</span> subId, <span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> *values,
<a name="l00066"></a>00066 <span class="keywordtype">int</span> dim, <span class="keywordtype">double</span> *derivs);
<a name="l00067"></a>00067 <span class="keyword">virtual</span> <span class="keywordtype">double</span> *<a class="code" href="a00240.html#a8f46a75c99a0ef318af1c4cd88097f1">GetParametricCoords</a>();
<a name="l00069"></a>00069
<a name="l00071"></a>00071
<a name="l00073"></a>00073 <span class="keywordtype">void</span> <a class="code" href="a00240.html#d6fc087f2f7305a236b12343a1406f84">Clip</a>(<span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2106bf5e5151797630e91167caab3f22b9a">value</a>, <a class="code" href="a00356.html" title="abstract superclass for arrays of numeric data">vtkDataArray</a> *cellScalars,
<a name="l00074"></a>00074 <a class="code" href="a01247.html" title="quickly locate points in 3-space">vtkPointLocator</a> *locator, <a class="code" href="a00242.html" title="object to represent cell connectivity">vtkCellArray</a> *polys,
<a name="l00075"></a>00075 <a class="code" href="a01242.html" title="represent and manipulate point attribute data">vtkPointData</a> *inPd, <a class="code" href="a01242.html" title="represent and manipulate point attribute data">vtkPointData</a> *outPd,
<a name="l00076"></a>00076 <a class="code" href="a00245.html" title="represent and manipulate cell attribute data">vtkCellData</a> *inCd, <a class="code" href="a02149.html#20bd6b6dedfe1bbb096c50354d52cc7e">vtkIdType</a> cellId, <a class="code" href="a00245.html" title="represent and manipulate cell attribute data">vtkCellData</a> *outCd,
<a name="l00077"></a>00077 <span class="keywordtype">int</span> insideOut);
<a name="l00079"></a>00079
<a name="l00081"></a>00081
<a name="l00083"></a>00083 <span class="keyword">static</span> <span class="keywordtype">void</span> InterpolationFunctions(<span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> sf[3]);
<a name="l00084"></a>00084 <span class="comment">// Description:</span>
<a name="l00085"></a>00085 <span class="comment">// @deprecated Replaced by vtkTriangle::InterpolateDerivs as of VTK 5.2</span>
<a name="l00086"></a>00086 <span class="keyword">static</span> <span class="keywordtype">void</span> InterpolationDerivs(<span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> derivs[6]);
<a name="l00087"></a>00087 <span class="comment">// Description:</span>
<a name="l00088"></a>00088 <span class="comment">// Compute the interpolation functions/derivatives</span>
<a name="l00089"></a>00089 <span class="comment">// (aka shape functions/derivatives)</span>
<a name="l00090"></a><a class="code" href="a01760.html#feadd259b43e55302c832947832c0379">00090</a> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="a00240.html#8511c354198e20220fc12babbeadb93a">InterpolateFunctions</a>(<span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> sf[3])
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092 <a class="code" href="a01760.html#87bee4e04fefeb6d5ef1ca3bfceff545">vtkTriangle::InterpolationFunctions</a>(pcoords,sf);
<a name="l00093"></a>00093 }
<a name="l00094"></a><a class="code" href="a01760.html#b1cdc31e7ed5783e123a6c99401a356c">00094</a> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="a00240.html#a09bb50666972c5cfff07f1aca3e161f">InterpolateDerivs</a>(<span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">double</span> derivs[6])
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <a class="code" href="a01760.html#5d506138ab02c87e79d756de45fa2a3f">vtkTriangle::InterpolationDerivs</a>(pcoords,derivs);
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 <span class="comment">// Description:</span>
<a name="l00099"></a>00099 <span class="comment">// Return the ids of the vertices defining edge (`edgeId`).</span>
<a name="l00100"></a>00100 <span class="comment">// Ids are related to the cell, not to the dataset.</span>
<a name="l00101"></a>00101 <span class="keywordtype">int</span> *GetEdgeArray(<span class="keywordtype">int</span> edgeId);
<a name="l00103"></a>00103
<a name="l00105"></a>00105
<a name="l00107"></a>00107 <span class="keywordtype">int</span> <a class="code" href="a00240.html#5a577034bc7a364304689dd016c57467">IntersectWithLine</a>(<span class="keywordtype">double</span> p1[3], <span class="keywordtype">double</span> p2[3], <span class="keywordtype">double</span> tol, <span class="keywordtype">double</span>& t,
<a name="l00108"></a>00108 <span class="keywordtype">double</span> x[3], <span class="keywordtype">double</span> pcoords[3], <span class="keywordtype">int</span>& subId);
<a name="l00110"></a>00110
<a name="l00112"></a>00112 <span class="keywordtype">int</span> <a class="code" href="a00240.html#e6d79848c5b56865eadac6bebbe723a1">GetParametricCenter</a>(<span class="keywordtype">double</span> pcoords[3]);
<a name="l00113"></a>00113
<a name="l00116"></a>00116 <span class="keywordtype">double</span> <a class="code" href="a00240.html#e3991f410acdad3d353b509ea9b68f39">GetParametricDistance</a>(<span class="keywordtype">double</span> pcoords[3]);
<a name="l00117"></a>00117
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keyword">static</span> <span class="keywordtype">void</span> TriangleCenter(<span class="keywordtype">double</span> p1[3], <span class="keywordtype">double</span> p2[3], <span class="keywordtype">double</span> p3[3],
<a name="l00121"></a>00121 <span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2107cf190fdac7e1fa1890c67ec92d414d6">center</a>[3]);
<a name="l00123"></a>00123
<a name="l00125"></a>00125 <span class="keyword">static</span> <span class="keywordtype">double</span> TriangleArea(<span class="keywordtype">double</span> p1[3], <span class="keywordtype">double</span> p2[3], <span class="keywordtype">double</span> p3[3]);
<a name="l00126"></a>00126
<a name="l00128"></a>00128
<a name="l00132"></a>00132 <span class="keyword">static</span> <span class="keywordtype">double</span> Circumcircle(<span class="keywordtype">double</span> p1[2], <span class="keywordtype">double</span> p2[2], <span class="keywordtype">double</span> p3[2],
<a name="l00133"></a>00133 <span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2107cf190fdac7e1fa1890c67ec92d414d6">center</a>[2]);
<a name="l00135"></a>00135
<a name="l00137"></a>00137
<a name="l00148"></a>00148 <span class="keyword">static</span> <span class="keywordtype">int</span> BarycentricCoords(<span class="keywordtype">double</span> x[2], <span class="keywordtype">double</span> x1[2], <span class="keywordtype">double</span> x2[2],
<a name="l00149"></a>00149 <span class="keywordtype">double</span> x3[2], <span class="keywordtype">double</span> bcoords[3]);
<a name="l00151"></a>00151
<a name="l00152"></a>00152
<a name="l00154"></a>00154
<a name="l00157"></a>00157 <span class="keyword">static</span> <span class="keywordtype">int</span> ProjectTo2D(<span class="keywordtype">double</span> x1[3], <span class="keywordtype">double</span> x2[3], <span class="keywordtype">double</span> x3[3],
<a name="l00158"></a>00158 <span class="keywordtype">double</span> v1[2], <span class="keywordtype">double</span> v2[2], <span class="keywordtype">double</span> v3[2]);
<a name="l00160"></a>00160
<a name="l00162"></a>00162
<a name="l00164"></a>00164 <span class="keyword">static</span> <span class="keywordtype">void</span> ComputeNormal(<a class="code" href="a01250.html" title="represent and manipulate 3D points">vtkPoints</a> *p, <span class="keywordtype">int</span> numPts, <a class="code" href="a02149.html#20bd6b6dedfe1bbb096c50354d52cc7e">vtkIdType</a> *pts,
<a name="l00165"></a>00165 <span class="keywordtype">double</span> n[3]);
<a name="l00167"></a>00167
<a name="l00169"></a>00169 <span class="keyword">static</span> <span class="keywordtype">void</span> ComputeNormal(<span class="keywordtype">double</span> v1[3], <span class="keywordtype">double</span> v2[3], <span class="keywordtype">double</span> v3[3], <span class="keywordtype">double</span> n[3]);
<a name="l00170"></a>00170
<a name="l00172"></a>00172
<a name="l00174"></a>00174 <span class="keyword">static</span> <span class="keywordtype">void</span> ComputeNormalDirection(<span class="keywordtype">double</span> v1[3], <span class="keywordtype">double</span> v2[3], <span class="keywordtype">double</span> v3[3],
<a name="l00175"></a>00175 <span class="keywordtype">double</span> n[3]);
<a name="l00177"></a>00177
<a name="l00179"></a>00179
<a name="l00184"></a>00184 <span class="keyword">static</span> <span class="keywordtype">int</span> PointInTriangle(<span class="keywordtype">double</span> x[3], <span class="keywordtype">double</span> x1[3],
<a name="l00185"></a>00185 <span class="keywordtype">double</span> x2[3], <span class="keywordtype">double</span> x3[3],
<a name="l00186"></a>00186 <span class="keywordtype">double</span> tol2);
<a name="l00188"></a>00188
<a name="l00190"></a>00190
<a name="l00193"></a>00193 <span class="keyword">static</span> <span class="keywordtype">void</span> ComputeQuadric(<span class="keywordtype">double</span> x1[3], <span class="keywordtype">double</span> x2[3], <span class="keywordtype">double</span> x3[3],
<a name="l00194"></a>00194 <span class="keywordtype">double</span> quadric[4][4]);
<a name="l00195"></a>00195 <span class="keyword">static</span> <span class="keywordtype">void</span> ComputeQuadric(<span class="keywordtype">double</span> x1[3], <span class="keywordtype">double</span> x2[3], <span class="keywordtype">double</span> x3[3],
<a name="l00196"></a>00196 <a class="code" href="a01443.html" title="evaluate implicit quadric function">vtkQuadric</a> *quadric);
<a name="l00198"></a>00198
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keyword">protected</span>:
<a name="l00201"></a>00201 <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>();
<a name="l00202"></a>00202 ~<a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>();
<a name="l00203"></a>00203
<a name="l00204"></a><a class="code" href="a01760.html#60a52ed7055f64104ba0754687bf160f">00204</a> <a class="code" href="a00960.html" title="cell represents a 1D line">vtkLine</a> *Line;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keyword">private</span>:
<a name="l00207"></a>00207 <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>(<span class="keyword">const</span> <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>&); <span class="comment">// Not implemented.</span>
<a name="l00208"></a>00208 <span class="keywordtype">void</span> operator=(<span class="keyword">const</span> <a class="code" href="a01760.html" title="a cell that represents a triangle">vtkTriangle</a>&); <span class="comment">// Not implemented.</span>
<a name="l00209"></a>00209 };
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00212"></a><a class="code" href="a01760.html#6f12c5b3d801960ec62bcc3e8efbdec9">00212</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="a01760.html#6f12c5b3d801960ec62bcc3e8efbdec9">vtkTriangle::GetParametricCenter</a>(<span class="keywordtype">double</span> pcoords[3])
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 pcoords[0] = pcoords[1] = 1./3; pcoords[2] = 0.0;
<a name="l00215"></a>00215 <span class="keywordflow">return</span> 0;
<a name="l00216"></a>00216 }
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00219"></a><a class="code" href="a01760.html#83b16ffe9a8e0c8c0fc17051d1b60eb5">00219</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="a01760.html#83b16ffe9a8e0c8c0fc17051d1b60eb5">vtkTriangle::ComputeNormalDirection</a>(<span class="keywordtype">double</span> v1[3], <span class="keywordtype">double</span> v2[3],
<a name="l00220"></a>00220 <span class="keywordtype">double</span> v3[3], <span class="keywordtype">double</span> n[3])
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 <span class="keywordtype">double</span> ax, ay, az, bx, by, bz;
<a name="l00223"></a>00223
<a name="l00224"></a>00224 <span class="comment">// order is important!!! maintain consistency with triangle vertex order</span>
<a name="l00225"></a>00225 ax = v3[0] - v2[0]; ay = v3[1] - v2[1]; az = v3[2] - v2[2];
<a name="l00226"></a>00226 bx = v1[0] - v2[0]; by = v1[1] - v2[1]; bz = v1[2] - v2[2];
<a name="l00227"></a>00227
<a name="l00228"></a>00228 n[0] = (ay * bz - az * by);
<a name="l00229"></a>00229 n[1] = (az * bx - ax * bz);
<a name="l00230"></a>00230 n[2] = (ax * by - ay * bx);
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00234"></a><a class="code" href="a01760.html#1fb18b46ba1844db68cdc4ddb0f13fe7">00234</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="a01760.html#94f40b6e93ef52236e95bd208460716d">vtkTriangle::ComputeNormal</a>(<span class="keywordtype">double</span> v1[3], <span class="keywordtype">double</span> v2[3],
<a name="l00235"></a>00235 <span class="keywordtype">double</span> v3[3], <span class="keywordtype">double</span> n[3])
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 <span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d21042c5d76c3275f5d17bc1b329d83ab003">length</a>;
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <a class="code" href="a01760.html#83b16ffe9a8e0c8c0fc17051d1b60eb5">vtkTriangle::ComputeNormalDirection</a>(v1, v2, v3, n);
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="keywordflow">if</span> ( (length = sqrt((n[0]*n[0] + n[1]*n[1] + n[2]*n[2]))) != 0.0 )
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 n[0] /= length;
<a name="l00244"></a>00244 n[1] /= length;
<a name="l00245"></a>00245 n[2] /= length;
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248
<a name="l00249"></a>00249 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00250"></a><a class="code" href="a01760.html#02f86dc0969df2e56b270dca390ae34a">00250</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="a01760.html#02f86dc0969df2e56b270dca390ae34a">vtkTriangle::TriangleCenter</a>(<span class="keywordtype">double</span> p1[3], <span class="keywordtype">double</span> p2[3],
<a name="l00251"></a>00251 <span class="keywordtype">double</span> p3[3], <span class="keywordtype">double</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d2107cf190fdac7e1fa1890c67ec92d414d6">center</a>[3])
<a name="l00252"></a>00252 {
<a name="l00253"></a>00253 center[0] = (p1[0]+p2[0]+p3[0]) / 3.0;
<a name="l00254"></a>00254 center[1] = (p1[1]+p2[1]+p3[1]) / 3.0;
<a name="l00255"></a>00255 center[2] = (p1[2]+p2[2]+p3[2]) / 3.0;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00259"></a><a class="code" href="a01760.html#17c25a458ee012fe2bee2b73a7dec5cc">00259</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="a01760.html#17c25a458ee012fe2bee2b73a7dec5cc">vtkTriangle::TriangleArea</a>(<span class="keywordtype">double</span> p1[3], <span class="keywordtype">double</span> p2[3], <span class="keywordtype">double</span> p3[3])
<a name="l00260"></a>00260 {
<a name="l00261"></a>00261 <span class="keywordtype">double</span> a,b,c;
<a name="l00262"></a>00262 a = <a class="code" href="a00996.html#11944eda4bd17e4e57bcd1e49c2f9446">vtkMath::Distance2BetweenPoints</a>(p1,p2);
<a name="l00263"></a>00263 b = <a class="code" href="a00996.html#11944eda4bd17e4e57bcd1e49c2f9446">vtkMath::Distance2BetweenPoints</a>(p2,p3);
<a name="l00264"></a>00264 c = <a class="code" href="a00996.html#11944eda4bd17e4e57bcd1e49c2f9446">vtkMath::Distance2BetweenPoints</a>(p3,p1);
<a name="l00265"></a>00265 <span class="keywordflow">return</span> (0.25* sqrt(fabs(4.0*a*c - (a-b+c)*(a-b+c))));
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267
<a name="l00268"></a>00268 <span class="preprocessor">#endif</span>
<a name="l00269"></a>00269 <span class="preprocessor"></span>
<a name="l00270"></a>00270
</pre></div></div>
<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 18:35:18 2009 for VTK by
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