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<h1>triangle3d.h</h1><a href="triangle3d_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (C) 2002-2010 Nikolaus Gebhardt</span>
<a name="l00002"></a>00002 <span class="comment">// This file is part of the "Irrlicht Engine".</span>
<a name="l00003"></a>00003 <span class="comment">// For conditions of distribution and use, see copyright notice in irrlicht.h</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005 <span class="preprocessor">#ifndef __IRR_TRIANGLE_3D_H_INCLUDED__</span>
<a name="l00006"></a>00006 <span class="preprocessor"></span><span class="preprocessor">#define __IRR_TRIANGLE_3D_H_INCLUDED__</span>
<a name="l00007"></a>00007 <span class="preprocessor"></span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "<a class="code" href="vector3d_8h.html">vector3d.h</a>"</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include "<a class="code" href="line3d_8h.html">line3d.h</a>"</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include "<a class="code" href="plane3d_8h.html">plane3d.h</a>"</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include "<a class="code" href="aabbox3d_8h.html">aabbox3d.h</a>"</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="keyword">namespace </span>irr
<a name="l00014"></a>00014 {
<a name="l00015"></a>00015 <span class="keyword">namespace </span>core
<a name="l00016"></a>00016 {
<a name="l00017"></a>00017
<a name="l00019"></a>00019 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00020"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html">00020</a> <span class="keyword">class </span><a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d</a>
<a name="l00021"></a>00021 {
<a name="l00022"></a>00022 <span class="keyword">public</span>:
<a name="l00023"></a>00023
<a name="l00025"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a4626559294771a8a2fb0cbbaedb6c5f9">00025</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a4626559294771a8a2fb0cbbaedb6c5f9" title="Constructor for an all 0 triangle.">triangle3d</a>() {}
<a name="l00027"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a489813c59bd130d256640ba4e2745505">00027</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a489813c59bd130d256640ba4e2745505" title="Constructor for triangle with given three vertices.">triangle3d</a>(<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> v1, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> v2, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> v3) : <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>(v1), <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>(v2), <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>(v3) {}
<a name="l00028"></a>00028
<a name="l00030"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a1541eda9f2baabc1f23eecb520c6fef2">00030</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a1541eda9f2baabc1f23eecb520c6fef2" title="Equality operator.">operator==</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d<T></a>& other)<span class="keyword"> const</span>
<a name="l00031"></a>00031 <span class="keyword"> </span>{
<a name="l00032"></a>00032 <span class="keywordflow">return</span> other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> && other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> && other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>;
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034
<a name="l00036"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a5a3b0b9e0ae5bc1c4c9bf11c06e9d30d">00036</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a5a3b0b9e0ae5bc1c4c9bf11c06e9d30d" title="Inequality operator.">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d<T></a>& other)<span class="keyword"> const</span>
<a name="l00037"></a>00037 <span class="keyword"> </span>{
<a name="l00038"></a>00038 <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==other);
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040
<a name="l00042"></a>00042
<a name="l00044"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a9e7a8bba12fb314da35a9c249761a170">00044</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a9e7a8bba12fb314da35a9c249761a170" title="Determines if the triangle is totally inside a bounding box.">isTotalInsideBox</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1aabbox3d.html" title="Axis aligned bounding box in 3d dimensional space.">aabbox3d<T></a>& box)<span class="keyword"> const</span>
<a name="l00045"></a>00045 <span class="keyword"> </span>{
<a name="l00046"></a>00046 <span class="keywordflow">return</span> (box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>) &&
<a name="l00047"></a>00047 box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>) &&
<a name="l00048"></a>00048 box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>));
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050
<a name="l00052"></a>00052
<a name="l00054"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a37e1822a18d88b08b2f9de9ed7e4ff84">00054</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a37e1822a18d88b08b2f9de9ed7e4ff84" title="Determines if the triangle is totally outside a bounding box.">isTotalOutsideBox</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1aabbox3d.html" title="Axis aligned bounding box in 3d dimensional space.">aabbox3d<T></a>& box)<span class="keyword"> const</span>
<a name="l00055"></a>00055 <span class="keyword"> </span>{
<a name="l00056"></a>00056 <span class="keywordflow">return</span> ((<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X) ||
<a name="l00057"></a>00057
<a name="l00058"></a>00058 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y) ||
<a name="l00059"></a>00059 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z > box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z) ||
<a name="l00060"></a>00060 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X) ||
<a name="l00061"></a>00061 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y) ||
<a name="l00062"></a>00062 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z && <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z < box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z));
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00066"></a>00066
<a name="l00068"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a0318b5951c702a306223b0dff7c83128">00068</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a0318b5951c702a306223b0dff7c83128" title="Get the closest point on a triangle to a point on the same plane.">closestPointOnTriangle</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a>& p)<span class="keyword"> const</span>
<a name="l00069"></a>00069 <span class="keyword"> </span>{
<a name="l00070"></a>00070 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a> rab = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d<T></a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>).getClosestPoint(p);
<a name="l00071"></a>00071 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a> rbc = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d<T></a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>).getClosestPoint(p);
<a name="l00072"></a>00072 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a> rca = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d<T></a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>, pointA).getClosestPoint(p);
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keyword">const</span> T d1 = rab.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00075"></a>00075 <span class="keyword">const</span> T d2 = rbc.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00076"></a>00076 <span class="keyword">const</span> T d3 = rca.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordflow">if</span> (d1 < d2)
<a name="l00079"></a>00079 <span class="keywordflow">return</span> d1 < d3 ? rab : rca;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keywordflow">return</span> d2 < d3 ? rbc : rca;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00085"></a>00085
<a name="l00088"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9">00088</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9" title="Check if a point is inside the triangle.">isPointInside</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& p)<span class="keyword"> const</span>
<a name="l00089"></a>00089 <span class="keyword"> </span>{
<a name="l00090"></a>00090 <span class="keywordflow">return</span> (isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>) &&
<a name="l00091"></a>00091 isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>) &&
<a name="l00092"></a>00092 isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>));
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00096"></a>00096
<a name="l00102"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a80986af43b5a104bef2c75f74fcf7465">00102</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a80986af43b5a104bef2c75f74fcf7465" title="Check if a point is inside the triangle.">isPointInsideFast</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& p)<span class="keyword"> const</span>
<a name="l00103"></a>00103 <span class="keyword"> </span>{
<a name="l00104"></a>00104 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> f = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00105"></a>00105 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> g = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - pointA;
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> a = f.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(f);
<a name="l00108"></a>00108 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> b = f.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00109"></a>00109 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> c = g.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> vp = p - pointA;
<a name="l00112"></a>00112 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> d = vp.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(f);
<a name="l00113"></a>00113 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> e = vp.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> x = (d*c)-(e*b);
<a name="l00116"></a>00116 <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> y = (e*a)-(d*b);
<a name="l00117"></a>00117 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> ac_bb = (a*c)-(b*b);
<a name="l00118"></a>00118 <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> z = x+y-ac_bb;
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="comment">// return sign(z) && !(sign(x)||sign(y))</span>
<a name="l00121"></a>00121 <span class="keywordflow">return</span> (( (<a class="code" href="namespaceirr_1_1core.html#aff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(z)) & ~((<a class="code" href="namespaceirr_1_1core.html#aff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(x))|(<a class="code" href="namespaceirr_1_1core.html#aff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(y))) ) & 0x80000000)!=0;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124
<a name="l00126"></a>00126
<a name="l00129"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ab29f327aac047e9984256b11ace27318">00129</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#ab29f327aac047e9984256b11ace27318" title="Get an intersection with a 3d line.">getIntersectionWithLimitedLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d<T></a>& line,
<a name="l00130"></a>00130 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& outIntersection)<span class="keyword"> const</span>
<a name="l00131"></a>00131 <span class="keyword"> </span>{
<a name="l00132"></a>00132 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506" title="Get an intersection with a 3d line.">getIntersectionWithLine</a>(line.<a class="code" href="classirr_1_1core_1_1line3d.html#a8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>,
<a name="l00133"></a>00133 line.<a class="code" href="classirr_1_1core_1_1line3d.html#a1394b59b713cec4044259d1999bbcc80" title="Get vector of line.">getVector</a>(), outIntersection) &&
<a name="l00134"></a>00134 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#ace05ee3b68b47c2ec6baff0d9d64de98" title="Returns if this vector interpreted as a point is on a line between two other points...">isBetweenPoints</a>(line.<a class="code" href="classirr_1_1core_1_1line3d.html#a8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>, line.<a class="code" href="classirr_1_1core_1_1line3d.html#aea19cb33971bb20e1d736facdae8a8f0" title="End point of line.">end</a>);
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137
<a name="l00139"></a>00139
<a name="l00147"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506">00147</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506" title="Get an intersection with a 3d line.">getIntersectionWithLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& linePoint,
<a name="l00148"></a>00148 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& outIntersection)<span class="keyword"> const</span>
<a name="l00149"></a>00149 <span class="keyword"> </span>{
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a" title="Calculates the intersection between a 3d line and the plane the triangle is on.">getIntersectionOfPlaneWithLine</a>(linePoint, lineVect, outIntersection))
<a name="l00151"></a>00151 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9" title="Check if a point is inside the triangle.">isPointInside</a>(outIntersection);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155
<a name="l00156"></a>00156
<a name="l00158"></a>00158
<a name="l00162"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a">00162</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a" title="Calculates the intersection between a 3d line and the plane the triangle is on.">getIntersectionOfPlaneWithLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& linePoint,
<a name="l00163"></a>00163 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& outIntersection)<span class="keyword"> const</span>
<a name="l00164"></a>00164 <span class="keyword"> </span>{
<a name="l00165"></a>00165 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> normal = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00166"></a>00166 T t2;
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keywordflow">if</span> ( <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a> ( t2 = normal.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lineVect) ) )
<a name="l00169"></a>00169 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00170"></a>00170
<a name="l00171"></a>00171 T d = <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.dotProduct(normal);
<a name="l00172"></a>00172 T t = -(normal.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(linePoint) - d) / t2;
<a name="l00173"></a>00173 outIntersection = linePoint + (lineVect * t);
<a name="l00174"></a>00174 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177
<a name="l00179"></a>00179
<a name="l00180"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2">00180</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>()<span class="keyword"> const</span>
<a name="l00181"></a>00181 <span class="keyword"> </span>{
<a name="l00182"></a>00182 <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>);
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00186"></a>00186
<a name="l00191"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#acec0805b8512d9c3b0d5fe4b2cdb8562">00191</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#acec0805b8512d9c3b0d5fe4b2cdb8562" title="Test if the triangle would be front or backfacing from any point.">isFrontFacing</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& lookDirection)<span class="keyword"> const</span>
<a name="l00192"></a>00192 <span class="keyword"> </span>{
<a name="l00193"></a>00193 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> n = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00194"></a>00194 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> d = (<a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a>)n.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lookDirection);
<a name="l00195"></a>00195 <span class="keywordflow">return</span> <a class="code" href="irr_math_8h.html#a26bc42a9cc1fc775bc588052c32ff9a0">F32_LOWER_EQUAL_0</a>(d);
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00199"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8cec7cdb0c9caa0b41f819eac2ad51aa">00199</a> <a class="code" href="classirr_1_1core_1_1plane3d.html" title="Template plane class with some intersection testing methods.">plane3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8cec7cdb0c9caa0b41f819eac2ad51aa" title="Get the plane of this triangle.">getPlane</a>()<span class="keyword"> const</span>
<a name="l00200"></a>00200 <span class="keyword"> </span>{
<a name="l00201"></a>00201 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1plane3d.html" title="Template plane class with some intersection testing methods.">plane3d<T></a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>);
<a name="l00202"></a>00202 }
<a name="l00203"></a>00203
<a name="l00205"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2394228f2da6063eb8fedf1f3da9facc">00205</a> T <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2394228f2da6063eb8fedf1f3da9facc" title="Get the area of the triangle.">getArea</a>()<span class="keyword"> const</span>
<a name="l00206"></a>00206 <span class="keyword"> </span>{
<a name="l00207"></a>00207 <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).getLength() * 0.5f;
<a name="l00208"></a>00208
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00212"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#aebcd3f29fcbf9008dac95810c81f152c">00212</a> <span class="keywordtype">void</span> <span class="keyword">set</span>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a>& a, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a>& b, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d<T></a>& c)
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> = a;
<a name="l00215"></a>00215 <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> = b;
<a name="l00216"></a>00216 <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> = c;
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218
<a name="l00220"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b">00220</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00221"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">00221</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>;
<a name="l00222"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">00222</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>;
<a name="l00223"></a>00223
<a name="l00224"></a>00224 <span class="keyword">private</span>:
<a name="l00225"></a>00225 <span class="keywordtype">bool</span> isOnSameSide(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& p1, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& p2,
<a name="l00226"></a>00226 <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& a, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a>& b)<span class="keyword"> const</span>
<a name="l00227"></a>00227 <span class="keyword"> </span>{
<a name="l00228"></a>00228 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> bminusa = b - a;
<a name="l00229"></a>00229 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> cp1 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#aa2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p1 - a);
<a name="l00230"></a>00230 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d<T></a> cp2 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#aa2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p2 - a);
<a name="l00231"></a>00231 <span class="keywordflow">return</span> (cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(cp2) >= 0.0f);
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 };
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00237"></a><a class="code" href="namespaceirr_1_1core.html#a1112835405bbec5dadf031dc7934e7d0">00237</a> <span class="keyword">typedef</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d<f32></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3df</a>;
<a name="l00238"></a>00238
<a name="l00240"></a><a class="code" href="namespaceirr_1_1core.html#a72a3206800849803d401d34764c40c21">00240</a> <span class="keyword">typedef</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d<s32></a> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3di</a>;
<a name="l00241"></a>00241
<a name="l00242"></a>00242 } <span class="comment">// end namespace core</span>
<a name="l00243"></a>00243 } <span class="comment">// end namespace irr</span>
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="preprocessor">#endif</span>
<a name="l00246"></a>00246 <span class="preprocessor"></span>
</pre></div></div>
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