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<h1>NLMISC::CNoiseColorGradient Class Reference</h1><code>#include <<a class="el" href="a06106.html">noise_value.h</a>></code>
<p>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A noisy color generator <dl compact><dt><b>Author:</b></dt><dd>Lionel Berenguier <p>
Nevrax France </dd></dl>
<dl compact><dt><b>Date:</b></dt><dd>2001 </dd></dl>
<p>
<p>
Definition at line <a class="el" href="a06106.html#l00089">89</a> of file <a class="el" href="a06106.html">noise_value.h</a>.<table border=0 cellpadding=0 cellspacing=0>
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<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradienta0">eval</a> (const <a class="el" href="a03128.html">CVector</a> &posInWorld, <a class="el" href="a03338.html">CRGBAF</a> &result) const </td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradienta1">serial</a> (<a class="el" href="a02270.html">IStream</a> &f)</td></tr>
<tr><td colspan=2><br><h2>Data Fields</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>std::vector< <a class="el" href="a03338.html">CRGBAF</a> > </td><td class="memItemRight" valign=bottom><a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradiento0">Gradients</a></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a02990.html">CNoiseValue</a> </td><td class="memItemRight" valign=bottom><a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradiento1">NoiseValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Abs and Rand should be 0 and 1 here. If not, some colors may not be generated... <a href="#NLMISC_1_1CNoiseColorGradiento1"></a><br><br></td></tr>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="NLMISC_1_1CNoiseColorGradienta0" doxytag="NLMISC::CNoiseColorGradient::eval" ></a><p>
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<td class="md" nowrap valign="top"> void NLMISC::CNoiseColorGradient::eval </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="a03128.html">CVector</a> & </td>
<td class="mdname" nowrap> <em>posInWorld</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="a03338.html">CRGBAF</a> & </td>
<td class="mdname" nowrap> <em>result</em></td>
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<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const</td>
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<p>
Use NoiseValue to compute a PerlinNoise E [0..1], and peek in Gradients, with linear interpolation. result unmodified if no colors. If only one color, copied into result. Warning! Use <a class="el" href="a05378.html#a397">OptFastFloor()</a>! So call must be enclosed with a <a class="el" href="a05378.html#a395">OptFastFloorBegin()</a>/OptFastFloorEnd().
<p>
Definition at line <a class="el" href="a06105.html#l00309">309</a> of file <a class="el" href="a06105.html">noise_value.cpp</a>.
<p>
References <a class="el" href="a05587.html#l00115">NLMISC::clamp()</a>, <a class="el" href="a06105.html#l00276">NLMISC::CNoiseValue::eval()</a>, <a class="el" href="a06106.html#l00094">Gradients</a>, <a class="el" href="a06106.html#l00093">NoiseValue</a>, <a class="el" href="a05701.html#l00125">NLMISC::OptFastFloor()</a>, and <a class="el" href="a05981.html#l00105">uint</a>.
<p>
Referenced by <a class="el" href="a06686.html#l00306">NL3D::CVegetable::generateInstance()</a>.
<p>
<div class="fragment"><pre>00310 {
00311 <span class="comment">// test if not null grads.</span>
00312 <a class="code" href="a04558.html#a15">uint</a> nGrads= <a class="code" href="a02989.html#NLMISC_1_1CNoiseColorGradiento0">Gradients</a>.size();
00313 <span class="keywordflow">if</span>(nGrads==0)
00314 <span class="keywordflow">return</span>;
00315 <span class="comment">// if only one color, easy</span>
00316 <span class="keywordflow">if</span>(nGrads==1)
00317 {
00318 result= <a class="code" href="a02989.html#NLMISC_1_1CNoiseColorGradiento0">Gradients</a>[0];
00319 }
00320 <span class="keywordflow">else</span>
00321 {
00322 <span class="comment">// eval noise</span>
00323 <span class="keywordtype">float</span> f= <a class="code" href="a02989.html#NLMISC_1_1CNoiseColorGradiento1">NoiseValue</a>.eval(posInWorld) * (nGrads-1);
00324 <a class="code" href="a05378.html#a374">clamp</a>(f, 0.f, (<span class="keywordtype">float</span>)(nGrads-1));
00325 <span class="comment">// look up in table of gradients.</span>
00326 <a class="code" href="a04558.html#a15">uint</a> <span class="keywordtype">id</span>= <a class="code" href="a05378.html#a397">OptFastFloor</a>(f);
00327 <a class="code" href="a05378.html#a374">clamp</a>(<span class="keywordtype">id</span>, 0U, nGrads-2);
00328 <span class="comment">// fractionnal part.</span>
00329 f= f-<span class="keywordtype">id</span>;
00330 <a class="code" href="a05378.html#a374">clamp</a>(f, 0, 1);
00331 <span class="comment">// interpolate the gradient.</span>
00332 result= <a class="code" href="a02989.html#NLMISC_1_1CNoiseColorGradiento0">Gradients</a>[<span class="keywordtype">id</span>]*(1-f) + Gradients[<span class="keywordtype">id</span>+1]*f;
00333 }
00334 }
</pre></div> </td>
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<a class="anchor" name="NLMISC_1_1CNoiseColorGradienta1" doxytag="NLMISC::CNoiseColorGradient::serial" ></a><p>
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<td class="md" nowrap valign="top"> void NLMISC::CNoiseColorGradient::serial </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="a02270.html">IStream</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>f</em> </td>
<td class="md" valign="top"> ) </td>
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<p>
Definition at line <a class="el" href="a06105.html#l00337">337</a> of file <a class="el" href="a06105.html">noise_value.cpp</a>.
<p>
References <a class="el" href="a06106.html#l00094">Gradients</a>, <a class="el" href="a06106.html#l00093">NoiseValue</a>, <a class="el" href="a06462.html#l00232">NLMISC::IStream::serial()</a>, <a class="el" href="a06462.html#l00324">NLMISC::IStream::serialCont()</a>, and <a class="el" href="a06461.html#l00266">NLMISC::IStream::serialVersion()</a>.
<p>
<div class="fragment"><pre>00338 {
00339 (<span class="keywordtype">void</span>)f.serialVersion(0);
00340 f.serial(NoiseValue);
00341 f.serialCont(Gradients);
00342 }
</pre></div> </td>
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<hr><h2>Field Documentation</h2>
<a class="anchor" name="NLMISC_1_1CNoiseColorGradiento0" doxytag="NLMISC::CNoiseColorGradient::Gradients" ></a><p>
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<td class="md" nowrap valign="top"> std::vector<<a class="el" href="a03338.html">CRGBAF</a>> <a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradiento0">NLMISC::CNoiseColorGradient::Gradients</a>
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<p>
Definition at line <a class="el" href="a06106.html#l00094">94</a> of file <a class="el" href="a06106.html">noise_value.h</a>.
<p>
Referenced by <a class="el" href="a06105.html#l00309">eval()</a>, and <a class="el" href="a06105.html#l00337">serial()</a>. </td>
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<a class="anchor" name="NLMISC_1_1CNoiseColorGradiento1" doxytag="NLMISC::CNoiseColorGradient::NoiseValue" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="a02990.html">CNoiseValue</a> <a class="el" href="a02989.html#NLMISC_1_1CNoiseColorGradiento1">NLMISC::CNoiseColorGradient::NoiseValue</a>
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<p>
Abs and Rand should be 0 and 1 here. If not, some colors may not be generated...
<p>
<p>
Definition at line <a class="el" href="a06106.html#l00093">93</a> of file <a class="el" href="a06106.html">noise_value.h</a>.
<p>
Referenced by <a class="el" href="a06105.html#l00309">eval()</a>, and <a class="el" href="a06105.html#l00337">serial()</a>. </td>
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a06106.html">noise_value.h</a><li><a class="el" href="a06105.html">noise_value.cpp</a></ul>
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