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<h1>OgrePlaneBoundedVolume.h</h1><a href="OgrePlaneBoundedVolume_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="comment">/*</span>
00002 <span class="comment">-----------------------------------------------------------------------------</span>
00003 <span class="comment">This source file is part of OGRE</span>
00004 <span class="comment">(Object-oriented Graphics Rendering Engine)</span>
00005 <span class="comment">For the latest info, see http://www.ogre3d.org/</span>
00006 <span class="comment"></span>
00007 <span class="comment">Copyright (c) 2000-2005 The OGRE Team</span>
00008 <span class="comment">Also see acknowledgements in Readme.html</span>
00009 <span class="comment"></span>
00010 <span class="comment">This program is free software; you can redistribute it and/or modify it under</span>
00011 <span class="comment">the terms of the GNU Lesser General Public License as published by the Free Software</span>
00012 <span class="comment">Foundation; either version 2 of the License, or (at your option) any later</span>
00013 <span class="comment">version.</span>
00014 <span class="comment"></span>
00015 <span class="comment">This program is distributed in the hope that it will be useful, but WITHOUT</span>
00016 <span class="comment">ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span>
00017 <span class="comment">FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.</span>
00018 <span class="comment"></span>
00019 <span class="comment">You should have received a copy of the GNU Lesser General Public License along with</span>
00020 <span class="comment">this program; if not, write to the Free Software Foundation, Inc., 59 Temple</span>
00021 <span class="comment">Place - Suite 330, Boston, MA 02111-1307, USA, or go to</span>
00022 <span class="comment">http://www.gnu.org/copyleft/lesser.txt.</span>
00023 <span class="comment">-----------------------------------------------------------------------------</span>
00024 <span class="comment">*/</span>
00025 <span class="preprocessor">#ifndef __PlaneBoundedVolume_H_</span>
00026 <span class="preprocessor"></span><span class="preprocessor">#define __PlaneBoundedVolume_H_</span>
00027 <span class="preprocessor"></span>
00028 <span class="comment">// Precompiler options</span>
00029 <span class="preprocessor">#include "<a class="code" href="OgrePrerequisites_8h.html">OgrePrerequisites.h</a>"</span>
00030 <span class="preprocessor">#include "<a class="code" href="OgreAxisAlignedBox_8h.html">OgreAxisAlignedBox.h</a>"</span>
00031 <span class="preprocessor">#include "<a class="code" href="OgreSphere_8h.html">OgreSphere.h</a>"</span>
00032 <span class="preprocessor">#include "<a class="code" href="OgreMath_8h.html">OgreMath.h</a>"</span>
00033 <span class="preprocessor">#include "<a class="code" href="OgrePlane_8h.html">OgrePlane.h</a>"</span>
00034
00035 <span class="keyword">namespace </span>Ogre {
00036
<a name="l00039"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html">00039</a> <span class="keyword">class </span><a class="code" href="OgrePlatform_8h.html#a13">_OgreExport</a> PlaneBoundedVolume
00040 {
00041 <span class="keyword">public</span>:
<a name="l00042"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumew0">00042</a> <span class="keyword">typedef</span> std::vector<Plane> <a class="code" href="namespaceOgre.html#a410">PlaneList</a>;
<a name="l00044"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumeo0">00044</a> <a class="code" href="namespaceOgre.html#a410">PlaneList</a> planes;
<a name="l00045"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumeo1">00045</a> Plane::Side outside;
00046
<a name="l00047"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumea0">00047</a> PlaneBoundedVolume() :outside(<a class="code" href="classOgre_1_1Plane.html">Plane</a>::NEGATIVE_SIDE) {}
<a name="l00049"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumea1">00049</a> PlaneBoundedVolume(Plane::Side theOutside)
00050 : outside(theOutside) {}
00051
<a name="l00055"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumea2">00055</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> intersects(<span class="keyword">const</span> <a class="code" href="classOgre_1_1AxisAlignedBox.html">AxisAlignedBox</a>& box)<span class="keyword"> const</span>
00056 <span class="keyword"> </span>{
00057 <span class="keywordflow">if</span> (box.<a class="code" href="classOgre_1_1AxisAlignedBox.html#Ogre_1_1AxisAlignedBoxa16">isNull</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;
00058 <span class="comment">// If all points are on outside of any plane, we fail</span>
00059 <span class="keyword">const</span> <a class="code" href="classOgre_1_1Vector3.html">Vector3</a>* points = box.<a class="code" href="classOgre_1_1AxisAlignedBox.html#Ogre_1_1AxisAlignedBoxa11">getAllCorners</a>();
00060 PlaneList::const_iterator i, iend;
00061 iend = planes.end();
00062 <span class="keywordflow">for</span> (i = planes.begin(); i != iend; ++i)
00063 {
00064 <span class="keyword">const</span> <a class="code" href="classOgre_1_1Plane.html">Plane</a>& plane = *i;
00065
00066 <span class="comment">// Test which side of the plane the corners are</span>
00067 <span class="comment">// Intersection fails when at all corners are on the</span>
00068 <span class="comment">// outside of one plane</span>
00069 <span class="keywordtype">bool</span> splittingPlane = <span class="keyword">true</span>;
00070 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> corner = 0; corner < 8; ++corner)
00071 {
00072 <span class="keywordflow">if</span> (plane.<a class="code" href="classOgre_1_1Plane.html#Ogre_1_1Planea5">getSide</a>(points[corner]) != outside)
00073 {
00074 <span class="comment">// this point is on the wrong side</span>
00075 splittingPlane = <span class="keyword">false</span>;
00076 <span class="keywordflow">break</span>;
00077 }
00078 }
00079 <span class="keywordflow">if</span> (splittingPlane)
00080 {
00081 <span class="comment">// Found a splitting plane therefore return not intersecting</span>
00082 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00083 }
00084 }
00085
00086 <span class="comment">// couldn't find a splitting plane, assume intersecting</span>
00087 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00088
00089 }
<a name="l00093"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumea3">00093</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> intersects(<span class="keyword">const</span> <a class="code" href="classOgre_1_1Sphere.html">Sphere</a>& sphere)<span class="keyword"> const</span>
00094 <span class="keyword"> </span>{
00095 PlaneList::const_iterator i, iend;
00096 iend = planes.end();
00097 <span class="keywordflow">for</span> (i = planes.begin(); i != iend; ++i)
00098 {
00099 <span class="keyword">const</span> <a class="code" href="classOgre_1_1Plane.html">Plane</a>& plane = *i;
00100
00101 <span class="comment">// Test which side of the plane the sphere is</span>
00102 <a class="code" href="namespaceOgre.html#a420">Real</a> d = plane.<a class="code" href="classOgre_1_1Plane.html#Ogre_1_1Planea6">getDistance</a>(sphere.<a class="code" href="classOgre_1_1Sphere.html#Ogre_1_1Spherea4">getCenter</a>());
00103 <span class="comment">// Negate d if planes point inwards</span>
00104 <span class="keywordflow">if</span> (outside == Plane::NEGATIVE_SIDE) d = -d;
00105
00106 <span class="keywordflow">if</span> ( (d - sphere.<a class="code" href="classOgre_1_1Sphere.html#Ogre_1_1Spherea2">getRadius</a>()) > 0)
00107 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00108 }
00109
00110 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00111
00112 }
00113
<a name="l00118"></a><a class="code" href="classOgre_1_1PlaneBoundedVolume.html#Ogre_1_1PlaneBoundedVolumea4">00118</a> <span class="keyword">inline</span> std::pair<bool, Real> intersects(<span class="keyword">const</span> <a class="code" href="classOgre_1_1Ray.html">Ray</a>& ray)
00119 {
00120 <span class="keywordflow">return</span> Math::intersects(ray, planes, outside == Plane::POSITIVE_SIDE);
00121 }
00122
00123 };
00124
<a name="l00125"></a><a class="code" href="namespaceOgre.html#a411">00125</a> <span class="keyword">typedef</span> std::vector<PlaneBoundedVolume> <a class="code" href="namespaceOgre.html#a411">PlaneBoundedVolumeList</a>;
00126
00127
00128 }
00129
00130 <span class="preprocessor">#endif</span>
00131 <span class="preprocessor"></span>
</pre></div><p>
Copyright © 2000-2005 by The OGRE Team<br />
Last modified Wed Feb 23 00:19:11 2005
</p>
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