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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) 2002-2009 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#4626559294771a8a2fb0cbbaedb6c5f9">00025</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#4626559294771a8a2fb0cbbaedb6c5f9" title="Constructor for an all 0 triangle.">triangle3d</a>() {}
<a name="l00027"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#489813c59bd130d256640ba4e2745505">00027</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#4626559294771a8a2fb0cbbaedb6c5f9" title="Constructor for an all 0 triangle.">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#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>(v1), <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>(v2), <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>(v3) {}
<a name="l00028"></a>00028
<a name="l00030"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#1541eda9f2baabc1f23eecb520c6fef2">00030</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#1541eda9f2baabc1f23eecb520c6fef2" 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#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> && other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> && other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">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#5a3b0b9e0ae5bc1c4c9bf11c06e9d30d">00036</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#5a3b0b9e0ae5bc1c4c9bf11c06e9d30d" 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#9e7a8bba12fb314da35a9c249761a170">00044</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#9e7a8bba12fb314da35a9c249761a170" 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#ee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" 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#ee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>) &&
<a name="l00048"></a>00048 box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#ee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">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#0318b5951c702a306223b0dff7c83128">00054</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#0318b5951c702a306223b0dff7c83128" 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="l00055"></a>00055 <span class="keyword"> </span>{
<a name="l00056"></a>00056 <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#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>).getClosestPoint(p);
<a name="l00057"></a>00057 <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#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>).getClosestPoint(p);
<a name="l00058"></a>00058 <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#08e65517102b6d04f0537b876e152466">pointC</a>, pointA).getClosestPoint(p);
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keyword">const</span> T d1 = rab.<a class="code" href="classirr_1_1core_1_1vector3d.html#fd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00061"></a>00061 <span class="keyword">const</span> T d2 = rbc.<a class="code" href="classirr_1_1core_1_1vector3d.html#fd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00062"></a>00062 <span class="keyword">const</span> T d3 = rca.<a class="code" href="classirr_1_1core_1_1vector3d.html#fd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="keywordflow">if</span> (d1 < d2)
<a name="l00065"></a>00065 <span class="keywordflow">return</span> d1 < d3 ? rab : rca;
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordflow">return</span> d2 < d3 ? rbc : rca;
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00071"></a>00071
<a name="l00074"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#2a35b829f8389c5548e19e28157979c9">00074</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#2a35b829f8389c5548e19e28157979c9" 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="l00075"></a>00075 <span class="keyword"> </span>{
<a name="l00076"></a>00076 <span class="keywordflow">return</span> (isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>) &&
<a name="l00077"></a>00077 isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>) &&
<a name="l00078"></a>00078 isOnSameSide(p, <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>));
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00082"></a>00082
<a name="l00088"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#80986af43b5a104bef2c75f74fcf7465">00088</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#80986af43b5a104bef2c75f74fcf7465" 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="l00089"></a>00089 <span class="keyword"> </span>{
<a name="l00090"></a>00090 <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#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00091"></a>00091 <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#08e65517102b6d04f0537b876e152466">pointC</a> - pointA;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> a = f.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(f);
<a name="l00094"></a>00094 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> b = f.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00095"></a>00095 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> c = g.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <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="l00098"></a>00098 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> d = vp.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(f);
<a name="l00099"></a>00099 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> e = vp.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(g);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> x = (d*c)-(e*b);
<a name="l00102"></a>00102 <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> y = (e*a)-(d*b);
<a name="l00103"></a>00103 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> ac_bb = (a*c)-(b*b);
<a name="l00104"></a>00104 <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> z = x+y-ac_bb;
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="comment">// return sign(z) && !(sign(x)||sign(y))</span>
<a name="l00107"></a>00107 <span class="keywordflow">return</span> (( (<a class="code" href="namespaceirr_1_1core.html#ff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(z)) & ~((<a class="code" href="namespaceirr_1_1core.html#ff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(x))|(<a class="code" href="namespaceirr_1_1core.html#ff42ea2c4d80cb7b45b71d1f63c6a226">IR</a>(y))) ) & 0x80000000)!=0;
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110
<a name="l00112"></a>00112
<a name="l00115"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#b29f327aac047e9984256b11ace27318">00115</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#b29f327aac047e9984256b11ace27318" 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="l00116"></a>00116 <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="l00117"></a>00117 <span class="keyword"> </span>{
<a name="l00118"></a>00118 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#8507e3af8385b006ca026173fad33506" title="Get an intersection with a 3d line.">getIntersectionWithLine</a>(line.<a class="code" href="classirr_1_1core_1_1line3d.html#8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>,
<a name="l00119"></a>00119 line.<a class="code" href="classirr_1_1core_1_1line3d.html#1394b59b713cec4044259d1999bbcc80" title="Get vector of line.">getVector</a>(), outIntersection) &&
<a name="l00120"></a>00120 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#ce05ee3b68b47c2ec6baff0d9d64de98" 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#8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>, line.<a class="code" href="classirr_1_1core_1_1line3d.html#ea19cb33971bb20e1d736facdae8a8f0" title="End point of line.">end</a>);
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123
<a name="l00125"></a>00125
<a name="l00133"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#8507e3af8385b006ca026173fad33506">00133</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#8507e3af8385b006ca026173fad33506" 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="l00134"></a>00134 <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="l00135"></a>00135 <span class="keyword"> </span>{
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#0ac5455e0215040cc93475baa543303a" title="Calculates the intersection between a 3d line and the plane the triangle is on.">getIntersectionOfPlaneWithLine</a>(linePoint, lineVect, outIntersection))
<a name="l00137"></a>00137 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#2a35b829f8389c5548e19e28157979c9" title="Check if a point is inside the triangle.">isPointInside</a>(outIntersection);
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142
<a name="l00144"></a>00144
<a name="l00148"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#0ac5455e0215040cc93475baa543303a">00148</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#0ac5455e0215040cc93475baa543303a" 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="l00149"></a>00149 <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="l00150"></a>00150 <span class="keyword"> </span>{
<a name="l00151"></a>00151 <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#14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00152"></a>00152 T t2;
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="keywordflow">if</span> ( <a class="code" href="namespaceirr_1_1core.html#fc24e6ba26469ec7ca7001ed272dc3b2" 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#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lineVect) ) )
<a name="l00155"></a>00155 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00156"></a>00156
<a name="l00157"></a>00157 T d = <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.dotProduct(normal);
<a name="l00158"></a>00158 T t = -(normal.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(linePoint) - d) / t2;
<a name="l00159"></a>00159 outIntersection = linePoint + (lineVect * t);
<a name="l00160"></a>00160 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163
<a name="l00165"></a>00165
<a name="l00166"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#14298103d89ba5eae37d82d8556f07e2">00166</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#14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>()<span class="keyword"> const</span>
<a name="l00167"></a>00167 <span class="keyword"> </span>{
<a name="l00168"></a>00168 <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>);
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00172"></a>00172
<a name="l00177"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#cec0805b8512d9c3b0d5fe4b2cdb8562">00177</a> <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#cec0805b8512d9c3b0d5fe4b2cdb8562" 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="l00178"></a>00178 <span class="keyword"> </span>{
<a name="l00179"></a>00179 <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#14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00180"></a>00180 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> d = (<a class="code" href="namespaceirr.html#0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a>)n.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lookDirection);
<a name="l00181"></a>00181 <span class="keywordflow">return</span> <a class="code" href="irr_math_8h.html#26bc42a9cc1fc775bc588052c32ff9a0">F32_LOWER_EQUAL_0</a>(d);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00185"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#8cec7cdb0c9caa0b41f819eac2ad51aa">00185</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#8cec7cdb0c9caa0b41f819eac2ad51aa" title="Get the plane of this triangle.">getPlane</a>()<span class="keyword"> const</span>
<a name="l00186"></a>00186 <span class="keyword"> </span>{
<a name="l00187"></a>00187 <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#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a>);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00191"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#2394228f2da6063eb8fedf1f3da9facc">00191</a> T <a class="code" href="classirr_1_1core_1_1triangle3d.html#2394228f2da6063eb8fedf1f3da9facc" title="Get the area of the triangle.">getArea</a>()<span class="keyword"> const</span>
<a name="l00192"></a>00192 <span class="keyword"> </span>{
<a name="l00193"></a>00193 <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).getLength() * 0.5;
<a name="l00194"></a>00194
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196
<a name="l00198"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ebcd3f29fcbf9008dac95810c81f152c">00198</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="l00199"></a>00199 {
<a name="l00200"></a>00200 <a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> = a;
<a name="l00201"></a>00201 <a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> = b;
<a name="l00202"></a>00202 <a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">pointC</a> = c;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00206"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#d4113299162b5855bccf8465b31ff78b">00206</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#d4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00207"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#3ed5276e50f3d3b6a1e2483dffa822ac">00207</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#3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>;
<a name="l00208"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#08e65517102b6d04f0537b876e152466">00208</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#08e65517102b6d04f0537b876e152466">pointC</a>;
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keyword">private</span>:
<a name="l00211"></a>00211 <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="l00212"></a>00212 <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="l00213"></a>00213 <span class="keyword"> </span>{
<a name="l00214"></a>00214 <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="l00215"></a>00215 <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#a2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p1 - a);
<a name="l00216"></a>00216 <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#a2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p2 - a);
<a name="l00217"></a>00217 <span class="keywordflow">return</span> (cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(cp2) >= 0.0f);
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 };
<a name="l00220"></a>00220
<a name="l00221"></a>00221
<a name="l00223"></a><a class="code" href="namespaceirr_1_1core.html#1112835405bbec5dadf031dc7934e7d0">00223</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="l00224"></a>00224
<a name="l00226"></a><a class="code" href="namespaceirr_1_1core.html#72a3206800849803d401d34764c40c21">00226</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="l00227"></a>00227
<a name="l00228"></a>00228 } <span class="comment">// end namespace core</span>
<a name="l00229"></a>00229 } <span class="comment">// end namespace irr</span>
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="preprocessor">#endif</span>
<a name="l00232"></a>00232 <span class="preprocessor"></span>
</pre></div></div>
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