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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
committerneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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+<hr><h1>track_bezier.h</h1><a href="track__bezier_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
+00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
+00008 <font class="comment"> *</font>
+00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
+00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
+00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
+00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
+00013 <font class="comment"> * any later version.</font>
+00014 <font class="comment"></font>
+00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
+00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
+00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
+00018 <font class="comment"> * General Public License for more details.</font>
+00019 <font class="comment"></font>
+00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
+00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
+00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
+00023 <font class="comment"> * MA 02111-1307, USA.</font>
+00024 <font class="comment"> */</font>
+00025
+00026
+00027 <font class="preprocessor">#ifndef NL_TRACK_KEYFRAMER_H</font>
+00028 <font class="preprocessor"></font><font class="preprocessor">#error "internal file included from track_keyframer.h"</font>
+00029 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
+00030 <font class="preprocessor"></font>
+00031
+00032
+00033 <font class="comment">// ***************************************************************************</font>
+00034 <font class="comment">// ***************************************************************************</font>
+00035 <font class="comment">// Bezier Keyframer.</font>
+00036 <font class="comment">// ***************************************************************************</font>
+00037 <font class="comment">// ***************************************************************************</font>
+00038
+00039
+00040 <font class="comment">// ***************************************************************************</font>
+00048 <font class="comment"></font><font class="keyword">template</font>&lt;<font class="keyword">class</font> CKeyT, <font class="keyword">class</font> T&gt;
+<a name="l00049"></a><a class="code" href="classCTrackKeyFramerBezier.html">00049</a> <font class="keyword">class </font><a class="code" href="classCTrackKeyFramerBezier.html">CTrackKeyFramerBezier</a> : <font class="keyword">public</font> ITrackKeyFramer&lt;CKeyT&gt;
+00050 {
+00051 <font class="keyword">public</font>:
+00052
+<a name="l00054"></a><a class="code" href="classCTrackKeyFramerBezier.html#a0">00054</a> <font class="keyword">virtual</font> <font class="keyword">const</font> IAnimatedValue&amp; <a class="code" href="classCTrackKeyFramerBezier.html#a0">getValue</a> ()<font class="keyword"> const</font>
+00055 <font class="keyword"> </font>{
+00056 <font class="keywordflow">return</font> <a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>;
+00057 }
+00058
+00059 <font class="keyword">protected</font>:
+00060
+<a name="l00061"></a><a class="code" href="classCTrackKeyFramerBezier.html#t0">00061</a> <font class="keyword">typedef</font> <font class="keyword">typename</font> CKeyT::TValueType <a class="code" href="classCTrackKeyFramerBezier.html#t0">TKeyValueType</a>;
+00062
+00063
+00065 <font class="comment">// @{</font>
+00066
+<a name="l00068"></a><a class="code" href="classCTrackKeyFramerBezier.html#z835_0">00068</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="classCTrackKeyFramerBezier.html#z835_0">evalKey</a> ( <font class="keyword">const</font> CKeyT* previous, <font class="keyword">const</font> CKeyT* next,
+00069 <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> datePrevious, <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> dateNext,
+00070 <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> date )
+00071 {
+00072 <font class="keywordflow">if</font>(previous &amp;&amp; next &amp;&amp; !previous-&gt;Step)
+00073 {
+00074 <font class="comment">// lerp from previous to cur.</font>
+00075 date-= datePrevious;
+00076 date*= previous-&gt;OODeltaTime;
+00077 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(date, 0,1);
+00078
+00079 <font class="comment">// Bezier interpolation.</font>
+00080 <font class="keywordtype">float</font> <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>= date;
+00081 <font class="keywordtype">float</font> s2 = <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a> * <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>;
+00082 <font class="keywordtype">float</font> s3 = s2 * <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>;
+00083 <font class="keywordtype">float</font> u = 1.0f - <a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>;
+00084 <font class="keywordtype">float</font> u2 = u * u;
+00085 <font class="keywordtype">float</font> u3 = u2 * u;
+00086
+00087 <font class="comment">// compute Bezier control points from tangents.</font>
+00088 <a class="code" href="classCTrackKeyFramerBezier.html#t0">TKeyValueType</a> cp0, cp1;
+00089
+00090 <font class="comment">// NB: loop case: dateNext is always &gt; datePrevious....</font>
+00091 cp0 = previous-&gt;Value + previous-&gt;OutTan * (dateNext-datePrevious) / 3.0f;
+00092 cp1 = next-&gt;Value + next-&gt;InTan * (dateNext-datePrevious) / 3.0f;
+00093
+00094 copyToValue(<a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value, previous-&gt;Value*u3 + cp0*3.0f*u2*<a class="code" href="driver__opengl__extension__def_8h.html#a383">s</a>
+00095 + cp1*3.0f*u*s2 + next-&gt;Value*s3);
+00096 }
+00097 <font class="keywordflow">else</font>
+00098 {
+00099 <font class="keywordflow">if</font> (previous)
+00100 copyToValue(<a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value, previous-&gt;Value);
+00101 <font class="keywordflow">else</font>
+00102 <font class="keywordflow">if</font> (next)
+00103 copyToValue(<a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value, next-&gt;Value);
+00104 }
+00105 }
+00106
+<a name="l00108"></a><a class="code" href="classCTrackKeyFramerBezier.html#z835_1">00108</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="classCTrackKeyFramerBezier.html#z835_1">compile</a>()
+00109 {
+00110 ITrackKeyFramer&lt;CKeyT&gt;::compile();
+00111
+00112 <font class="comment">// Nothing else to do!! Tangents are given from user.</font>
+00113 }
+00114
+00115 <font class="comment">// @}</font>
+00116
+00117 <font class="keyword">private</font>:
+<a name="l00118"></a><a class="code" href="classCTrackKeyFramerBezier.html#o0">00118</a> CAnimatedValueBlendable&lt;T&gt; <a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>;
+00119 };
+00120
+00121
+00122
+00123 <font class="comment">// ***************************************************************************</font>
+<a name="l00131"></a><a class="code" href="classCTrackKeyFramerBezier_3_01CKeyBezierQuat_00_01CQuat_01_4.html">00131</a> <font class="comment"></font><font class="keyword">class </font><a class="code" href="classCTrackKeyFramerBezier.html">CTrackKeyFramerBezier</a>&lt;CKeyBezierQuat, CQuat&gt; : <font class="keyword">public</font> ITrackKeyFramer&lt;CKeyBezierQuat&gt;
+00132 {
+00133 <font class="keyword">public</font>:
+00134
+<a name="l00136"></a><a class="code" href="classCTrackKeyFramerBezier_3_01CKeyBezierQuat_00_01CQuat_01_4.html#a0">00136</a> <font class="keyword">virtual</font> <font class="keyword">const</font> IAnimatedValue&amp; <a class="code" href="classCTrackKeyFramerBezier.html#a0">getValue</a> ()<font class="keyword"> const</font>
+00137 <font class="keyword"> </font>{
+00138 <font class="keywordflow">return</font> <a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>;
+00139 }
+00140
+00141 <font class="keyword">protected</font>:
+00142
+00144 <font class="comment">// @{</font>
+00145
+<a name="l00147"></a><a class="code" href="classCTrackKeyFramerBezier_3_01CKeyBezierQuat_00_01CQuat_01_4.html#z836_0">00147</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="classCTrackKeyFramerBezier.html#z835_0">evalKey</a> ( <font class="keyword">const</font> CKeyBezierQuat* previous, <font class="keyword">const</font> CKeyBezierQuat* next,
+00148 <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> datePrevious, <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> dateNext,
+00149 <a class="code" href="namespaceNL3D.html#a1">TAnimationTime</a> date )
+00150 {
+00151 <font class="keywordflow">if</font>(previous &amp;&amp; next)
+00152 {
+00153 <font class="comment">// lerp from previous to cur.</font>
+00154 date-= datePrevious;
+00155 date*= previous-&gt;OODeltaTime;
+00156 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(date, 0,1);
+00157
+00158 <font class="comment">// quad slerp.</font>
+00159 <a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value = CQuat::squad(previous-&gt;Value, previous-&gt;A, next-&gt;A, next-&gt;Value, date);
+00160 }
+00161 <font class="keywordflow">else</font>
+00162 {
+00163 <font class="keywordflow">if</font> (previous)
+00164 copyToValue(<a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value, previous-&gt;Value);
+00165 <font class="keywordflow">else</font>
+00166 <font class="keywordflow">if</font> (next)
+00167 copyToValue(<a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>.Value, next-&gt;Value);
+00168 }
+00169 }
+00170
+<a name="l00172"></a><a class="code" href="classCTrackKeyFramerBezier_3_01CKeyBezierQuat_00_01CQuat_01_4.html#z836_1">00172</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="classCTrackKeyFramerBezier.html#z835_1">compile</a>()
+00173 {
+00174 ITrackKeyFramer&lt;CKeyBezierQuat&gt;::compile();
+00175
+00176 <font class="comment">// makeclosest quaternions, Tangents Precompute.</font>
+00177 sint nKeys= _MapKey.size();
+00178 <font class="keywordflow">if</font>(nKeys&lt;=1)
+00179 <font class="keywordflow">return</font>;
+00180
+00181 TMapTimeCKey::iterator it;
+00182 TMapTimeCKey::iterator itNext;
+00183 TMapTimeCKey::iterator itPrev;
+00184
+00185 it= _MapKey.begin(); <font class="comment">// first key.</font>
+00186 itNext= it; itNext++; <font class="comment">// second key.</font>
+00187 itPrev= _MapKey.end(); <font class="comment">// end key.</font>
+00188
+00189 <font class="comment">// Compute all keys.</font>
+00190 <font class="keywordflow">for</font>(;it!=_MapKey.end();)
+00191 {
+00192
+00193 CKeyBezierQuat &amp;key= it-&gt;second;
+00194 CQuat &amp;cur= key.Value;
+00195
+00196 <font class="keywordflow">if</font>(itPrev!= _MapKey.end())
+00197 {
+00198 cur.makeClosest(itPrev-&gt;second.Value);
+00199 }
+00200
+00201 CQuat prev, next;
+00202
+00203 <font class="comment">// compute prev / next.</font>
+00204 <font class="keywordflow">if</font>(itPrev!= _MapKey.end())
+00205 prev= itPrev-&gt;second.Value;
+00206 <font class="keywordflow">else</font>
+00207 prev= itNext-&gt;second.Value;
+00208 <font class="keywordflow">if</font>(itNext!= _MapKey.end())
+00209 next= itNext-&gt;second.Value;
+00210 <font class="keywordflow">else</font>
+00211 next= itPrev-&gt;second.Value;
+00212
+00213 <font class="comment">// Compute A.</font>
+00214 CQuat qm,qp,<a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a>;
+00215
+00216 qm = CQuat::lnDif(cur, prev);
+00217 qp = CQuat::lnDif(cur, next);
+00218 <a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a> = -.25f*(qm+qp);
+00219 key.A= cur*(<a class="code" href="driver__opengl__extension__def_8h.html#a385">r</a>.exp());
+00220
+00221 <font class="comment">// Next key!!</font>
+00222 itPrev= it;
+00223 it++;
+00224
+00225 <font class="keywordflow">if</font>(itNext!= _MapKey.end())
+00226 itNext++;
+00227 }
+00228
+00229 }
+00230
+00231 <font class="comment">// @}</font>
+00232
+00233 <font class="keyword">private</font>:
+<a name="l00234"></a><a class="code" href="classCTrackKeyFramerBezier_3_01CKeyBezierQuat_00_01CQuat_01_4.html#o0">00234</a> CAnimatedValueBlendable&lt;CQuat&gt; <a class="code" href="classCTrackKeyFramerBezier.html#o0">_Value</a>;
+00235 };
+</pre></div>
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