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91<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) 2002-2012 Nikolaus Gebhardt</span>
92<a name="l00002"></a>00002 <span class="comment">// This file is part of the &quot;Irrlicht Engine&quot;.</span>
93<a name="l00003"></a>00003 <span class="comment">// For conditions of distribution and use, see copyright notice in irrlicht.h</span>
94<a name="l00004"></a>00004
95<a name="l00005"></a>00005 <span class="preprocessor">#ifndef __IRR_TRIANGLE_3D_H_INCLUDED__</span>
96<a name="l00006"></a>00006 <span class="preprocessor"></span><span class="preprocessor">#define __IRR_TRIANGLE_3D_H_INCLUDED__</span>
97<a name="l00007"></a>00007 <span class="preprocessor"></span>
98<a name="l00008"></a>00008 <span class="preprocessor">#include &quot;<a class="code" href="vector3d_8h.html">vector3d.h</a>&quot;</span>
99<a name="l00009"></a>00009 <span class="preprocessor">#include &quot;<a class="code" href="line3d_8h.html">line3d.h</a>&quot;</span>
100<a name="l00010"></a>00010 <span class="preprocessor">#include &quot;<a class="code" href="plane3d_8h.html">plane3d.h</a>&quot;</span>
101<a name="l00011"></a>00011 <span class="preprocessor">#include &quot;<a class="code" href="aabbox3d_8h.html">aabbox3d.h</a>&quot;</span>
102<a name="l00012"></a>00012
103<a name="l00013"></a>00013 <span class="keyword">namespace </span>irr
104<a name="l00014"></a>00014 {
105<a name="l00015"></a>00015 <span class="keyword">namespace </span>core
106<a name="l00016"></a>00016 {
107<a name="l00017"></a>00017
108<a name="l00019"></a>00019 <span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;
109<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>
110<a name="l00021"></a>00021 {
111<a name="l00022"></a>00022 <span class="keyword">public</span>:
112<a name="l00023"></a>00023
113<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>() {}
114<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&lt;T&gt;</a> v1, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> v2, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</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) {}
115<a name="l00028"></a>00028
116<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&lt;T&gt;</a>&amp; other)<span class="keyword"> const</span>
117<a name="l00031"></a>00031 <span class="keyword"> </span>{
118<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> &amp;&amp; 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> &amp;&amp; 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>;
119<a name="l00033"></a>00033 }
120<a name="l00034"></a>00034
121<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&lt;T&gt;</a>&amp; other)<span class="keyword"> const</span>
122<a name="l00037"></a>00037 <span class="keyword"> </span>{
123<a name="l00038"></a>00038 <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==other);
124<a name="l00039"></a>00039 }
125<a name="l00040"></a>00040
126<a name="l00042"></a>00042
127<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&lt;T&gt;</a>&amp; box)<span class="keyword"> const</span>
128<a name="l00045"></a>00045 <span class="keyword"> </span>{
129<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>) &amp;&amp;
130<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>) &amp;&amp;
131<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>));
132<a name="l00049"></a>00049 }
133<a name="l00050"></a>00050
134<a name="l00052"></a>00052
135<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&lt;T&gt;</a>&amp; box)<span class="keyword"> const</span>
136<a name="l00055"></a>00055 <span class="keyword"> </span>{
137<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 &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X) ||
138<a name="l00057"></a>00057
139<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 &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y) ||
140<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 &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z) ||
141<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 &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X) ||
142<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 &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y) ||
143<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 &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z));
144<a name="l00063"></a>00063 }
145<a name="l00064"></a>00064
146<a name="l00066"></a>00066
147<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&lt;T&gt;</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&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
148<a name="l00069"></a>00069 <span class="keyword"> </span>{
149<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&lt;T&gt;</a> rab = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</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);
150<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&lt;T&gt;</a> rbc = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</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);
151<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&lt;T&gt;</a> rca = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</a>(<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>).getClosestPoint(p);
152<a name="l00073"></a>00073
153<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);
154<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);
155<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);
156<a name="l00077"></a>00077
157<a name="l00078"></a>00078 <span class="keywordflow">if</span> (d1 &lt; d2)
158<a name="l00079"></a>00079 <span class="keywordflow">return</span> d1 &lt; d3 ? rab : rca;
159<a name="l00080"></a>00080
160<a name="l00081"></a>00081 <span class="keywordflow">return</span> d2 &lt; d3 ? rbc : rca;
161<a name="l00082"></a>00082 }
162<a name="l00083"></a>00083
163<a name="l00085"></a>00085 <span class="comment">/*</span>
164<a name="l00086"></a>00086 <span class="comment"> \param p Point to test. Assumes that this point is already</span>
165<a name="l00087"></a>00087 <span class="comment"> on the plane of the triangle.</span>
166<a name="l00088"></a>00088 <span class="comment"> \return True if the point is inside the triangle, otherwise false. */</span>
167<a name="l00089"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9">00089</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 (border-points count also as inside)">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&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
168<a name="l00090"></a>00090 <span class="keyword"> </span>{
169<a name="l00091"></a>00091 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> af64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z);
170<a name="l00092"></a>00092 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> bf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z);
171<a name="l00093"></a>00093 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z);
172<a name="l00094"></a>00094 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> pf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
173<a name="l00095"></a>00095 <span class="keywordflow">return</span> (isOnSameSide(pf64, af64, bf64, cf64) &amp;&amp;
174<a name="l00096"></a>00096 isOnSameSide(pf64, bf64, af64, cf64) &amp;&amp;
175<a name="l00097"></a>00097 isOnSameSide(pf64, cf64, af64, bf64));
176<a name="l00098"></a>00098 }
177<a name="l00099"></a>00099
178<a name="l00101"></a>00101
179<a name="l00108"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a80986af43b5a104bef2c75f74fcf7465">00108</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 (border-points count also as inside)">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&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
180<a name="l00109"></a>00109 <span class="keyword"> </span>{
181<a name="l00110"></a>00110 <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&lt;T&gt;</a> a = <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>;
182<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&lt;T&gt;</a> b = <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>;
183<a name="l00112"></a>00112 <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&lt;T&gt;</a> c = p - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
184<a name="l00113"></a>00113
185<a name="l00114"></a>00114 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAA = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( a);
186<a name="l00115"></a>00115 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAB = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( b);
187<a name="l00116"></a>00116 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAC = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( c);
188<a name="l00117"></a>00117 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotBB = b.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( b);
189<a name="l00118"></a>00118 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotBC = b.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( c);
190<a name="l00119"></a>00119
191<a name="l00120"></a>00120 <span class="comment">// get coordinates in barycentric coordinate system</span>
192<a name="l00121"></a>00121 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> invDenom = 1/(dotAA * dotBB - dotAB * dotAB);
193<a name="l00122"></a>00122 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> u = (dotBB * dotAC - dotAB * dotBC) * invDenom;
194<a name="l00123"></a>00123 <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> v = (dotAA * dotBC - dotAB * dotAC ) * invDenom;
195<a name="l00124"></a>00124
196<a name="l00125"></a>00125 <span class="comment">// We count border-points as inside to keep downward compatibility.</span>
197<a name="l00126"></a>00126 <span class="comment">// Rounding-error also needed for some test-cases.</span>
198<a name="l00127"></a>00127 <span class="keywordflow">return</span> (u &gt; -<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>) &amp;&amp; (v &gt;= 0) &amp;&amp; (u + v &lt; 1+<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>);
199<a name="l00128"></a>00128
200<a name="l00129"></a>00129 }
201<a name="l00130"></a>00130
202<a name="l00131"></a>00131
203<a name="l00133"></a>00133
204<a name="l00136"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ab29f327aac047e9984256b11ace27318">00136</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&lt;T&gt;</a>&amp; line,
205<a name="l00137"></a>00137 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
206<a name="l00138"></a>00138 <span class="keyword"> </span>{
207<a name="l00139"></a>00139 <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>,
208<a name="l00140"></a>00140 line.<a class="code" href="classirr_1_1core_1_1line3d.html#a1394b59b713cec4044259d1999bbcc80" title="Get vector of line.">getVector</a>(), outIntersection) &amp;&amp;
209<a name="l00141"></a>00141 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>);
210<a name="l00142"></a>00142 }
211<a name="l00143"></a>00143
212<a name="l00144"></a>00144
213<a name="l00146"></a>00146
214<a name="l00154"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506">00154</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&lt;T&gt;</a>&amp; linePoint,
215<a name="l00155"></a>00155 <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&lt;T&gt;</a>&amp; lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
216<a name="l00156"></a>00156 <span class="keyword"> </span>{
217<a name="l00157"></a>00157 <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))
218<a name="l00158"></a>00158 <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 (border-points count also as inside)">isPointInside</a>(outIntersection);
219<a name="l00159"></a>00159
220<a name="l00160"></a>00160 <span class="keywordflow">return</span> <span class="keyword">false</span>;
221<a name="l00161"></a>00161 }
222<a name="l00162"></a>00162
223<a name="l00163"></a>00163
224<a name="l00165"></a>00165
225<a name="l00169"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a">00169</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&lt;T&gt;</a>&amp; linePoint,
226<a name="l00170"></a>00170 <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&lt;T&gt;</a>&amp; lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
227<a name="l00171"></a>00171 <span class="keyword"> </span>{
228<a name="l00172"></a>00172 <span class="comment">// Work with f64 to get more precise results (makes enough difference to be worth the casts).</span>
229<a name="l00173"></a>00173 <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&lt;f64&gt;</a> linePointf64(linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
230<a name="l00174"></a>00174 <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&lt;f64&gt;</a> lineVectf64(lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
231<a name="l00175"></a>00175 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> outIntersectionf64;
232<a name="l00176"></a>00176
233<a name="l00177"></a>00177 <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">core::triangle3d&lt;irr::f64&gt;</a> trianglef64(<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z)
234<a name="l00178"></a>00178 ,<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z)
235<a name="l00179"></a>00179 , <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z));
236<a name="l00180"></a>00180 <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&lt;irr::f64&gt;</a> normalf64 = trianglef64.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
237<a name="l00181"></a>00181 <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> t2;
238<a name="l00182"></a>00182
239<a name="l00183"></a>00183 <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 = normalf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lineVectf64) ) )
240<a name="l00184"></a>00184 <span class="keywordflow">return</span> <span class="keyword">false</span>;
241<a name="l00185"></a>00185
242<a name="l00186"></a>00186 <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> d = trianglef64.<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.dotProduct(normalf64);
243<a name="l00187"></a>00187 <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> t = -(normalf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(linePointf64) - d) / t2;
244<a name="l00188"></a>00188 outIntersectionf64 = linePointf64 + (lineVectf64 * t);
245<a name="l00189"></a>00189
246<a name="l00190"></a>00190 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>;
247<a name="l00191"></a>00191 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>;
248<a name="l00192"></a>00192 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>;
249<a name="l00193"></a>00193 <span class="keywordflow">return</span> <span class="keyword">true</span>;
250<a name="l00194"></a>00194 }
251<a name="l00195"></a>00195
252<a name="l00196"></a>00196
253<a name="l00198"></a>00198
254<a name="l00199"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2">00199</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</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>
255<a name="l00200"></a>00200 <span class="keyword"> </span>{
256<a name="l00201"></a>00201 <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>);
257<a name="l00202"></a>00202 }
258<a name="l00203"></a>00203
259<a name="l00205"></a>00205
260<a name="l00210"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#acec0805b8512d9c3b0d5fe4b2cdb8562">00210</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&lt;T&gt;</a>&amp; lookDirection)<span class="keyword"> const</span>
261<a name="l00211"></a>00211 <span class="keyword"> </span>{
262<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&lt;T&gt;</a> n = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
263<a name="l00213"></a>00213 <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);
264<a name="l00214"></a>00214 <span class="keywordflow">return</span> <a class="code" href="irr_math_8h.html#a26bc42a9cc1fc775bc588052c32ff9a0">F32_LOWER_EQUAL_0</a>(d);
265<a name="l00215"></a>00215 }
266<a name="l00216"></a>00216
267<a name="l00218"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8cec7cdb0c9caa0b41f819eac2ad51aa">00218</a> <a class="code" href="classirr_1_1core_1_1plane3d.html" title="Template plane class with some intersection testing methods.">plane3d&lt;T&gt;</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>
268<a name="l00219"></a>00219 <span class="keyword"> </span>{
269<a name="l00220"></a>00220 <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&lt;T&gt;</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>);
270<a name="l00221"></a>00221 }
271<a name="l00222"></a>00222
272<a name="l00224"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2394228f2da6063eb8fedf1f3da9facc">00224</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>
273<a name="l00225"></a>00225 <span class="keyword"> </span>{
274<a name="l00226"></a>00226 <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;
275<a name="l00227"></a>00227
276<a name="l00228"></a>00228 }
277<a name="l00229"></a>00229
278<a name="l00231"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#aebcd3f29fcbf9008dac95810c81f152c">00231</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&lt;T&gt;</a>&amp; 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&lt;T&gt;</a>&amp; 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&lt;T&gt;</a>&amp; c)
279<a name="l00232"></a>00232 {
280<a name="l00233"></a>00233 <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> = a;
281<a name="l00234"></a>00234 <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> = b;
282<a name="l00235"></a>00235 <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> = c;
283<a name="l00236"></a>00236 }
284<a name="l00237"></a>00237
285<a name="l00239"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b">00239</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
286<a name="l00240"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">00240</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>;
287<a name="l00241"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">00241</a> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>;
288<a name="l00242"></a>00242
289<a name="l00243"></a>00243 <span class="keyword">private</span>:
290<a name="l00244"></a>00244 <span class="comment">// Using f64 instead of &lt;T&gt; to avoid integer overflows when T=int (maybe also less floating point troubles).</span>
291<a name="l00245"></a>00245 <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&lt;f64&gt;</a>&amp; 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&lt;f64&gt;</a>&amp; p2,
292<a name="l00246"></a>00246 <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&lt;f64&gt;</a>&amp; 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&lt;f64&gt;</a>&amp; b)<span class="keyword"> const</span>
293<a name="l00247"></a>00247 <span class="keyword"> </span>{
294<a name="l00248"></a>00248 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> bminusa = b - a;
295<a name="l00249"></a>00249 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</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);
296<a name="l00250"></a>00250 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</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);
297<a name="l00251"></a>00251 <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> res = cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(cp2);
298<a name="l00252"></a>00252 <span class="keywordflow">if</span> ( res &lt; 0 )
299<a name="l00253"></a>00253 {
300<a name="l00254"></a>00254 <span class="comment">// This catches some floating point troubles.</span>
301<a name="l00255"></a>00255 <span class="comment">// Unfortunately slightly expensive and we don&#39;t really know the best epsilon for iszero.</span>
302<a name="l00256"></a>00256 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cp1 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#a84a1861464ef70e6965c146732103c09" title="Normalizes the vector.">normalize</a>().crossProduct((p1 - a).normalize());
303<a name="l00257"></a>00257 <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>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>)
304<a name="l00258"></a>00258 &amp;&amp; <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)ROUNDING_ERROR_f32)
305<a name="l00259"></a>00259 &amp;&amp; <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)ROUNDING_ERROR_f32) )
306<a name="l00260"></a>00260 {
307<a name="l00261"></a>00261 res = 0.f;
308<a name="l00262"></a>00262 }
309<a name="l00263"></a>00263 }
310<a name="l00264"></a>00264 <span class="keywordflow">return</span> (res &gt;= 0.0f);
311<a name="l00265"></a>00265 }
312<a name="l00266"></a>00266 };
313<a name="l00267"></a>00267
314<a name="l00268"></a>00268
315<a name="l00270"></a><a class="code" href="namespaceirr_1_1core.html#a1112835405bbec5dadf031dc7934e7d0">00270</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&lt;f32&gt;</a> <a class="code" href="namespaceirr_1_1core.html#a1112835405bbec5dadf031dc7934e7d0" title="Typedef for a f32 3d triangle.">triangle3df</a>;
316<a name="l00271"></a>00271
317<a name="l00273"></a><a class="code" href="namespaceirr_1_1core.html#a72a3206800849803d401d34764c40c21">00273</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&lt;s32&gt;</a> <a class="code" href="namespaceirr_1_1core.html#a72a3206800849803d401d34764c40c21" title="Typedef for an integer 3d triangle.">triangle3di</a>;
318<a name="l00274"></a>00274
319<a name="l00275"></a>00275 } <span class="comment">// end namespace core</span>
320<a name="l00276"></a>00276 } <span class="comment">// end namespace irr</span>
321<a name="l00277"></a>00277
322<a name="l00278"></a>00278 <span class="preprocessor">#endif</span>
323<a name="l00279"></a>00279 <span class="preprocessor"></span>
324</pre></div></div>
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