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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>NeL: NL3D::CLandscapeVegetableBlockCreateContext class Reference</title>
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<h1>NL3D::CLandscapeVegetableBlockCreateContext Class Reference</h1><code>#include &lt;<a class="el" href="a05877.html">landscape_vegetable_block.h</a>&gt;</code>
<p>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Information for instanciation of vegetable IG. NB: there is one <a class="el" href="a02717.html">CLandscapeVegetableBlock</a> per landscape TessBlock. <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="a05877.html#l00127">127</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.<table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContexta0">CLandscapeVegetableBlockCreateContext</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top>void&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContexta1">eval</a> (<a class="el" href="a04558.html#a15">uint</a> ts, <a class="el" href="a04558.html#a15">uint</a> tt, float <a class="el" href="a04223.html#a572">x</a>, float <a class="el" href="a04223.html#a573">y</a>, <a class="el" href="a03128.html">CVector</a> &amp;pos)</td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top>void&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContexta2">init</a> (<a class="el" href="a03057.html">CPatch</a> *patch, <a class="el" href="a04558.html#a15">uint</a> ts, <a class="el" href="a04558.html#a15">uint</a> tt)</td></tr>

<tr><td colspan=2><br><h2>Private Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>bool&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">_Empty</a></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a03057.html">CPatch</a> *&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a></td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a03128.html">CVector</a>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr2">_Pos</a> [9]</td></tr>

<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr3">_Ts</a></td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Coordinate of the lower-left tile. 2x2 tile vegetables are generated.  <a href="#NL3D_1_1CLandscapeVegetableBlockCreateContextr3"></a><br><br></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr4">_Tt</a></td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Coordinate of the lower-left tile. 2x2 tile vegetables are generated.  <a href="#NL3D_1_1CLandscapeVegetableBlockCreateContextr4"></a><br><br></td></tr>
</table>
<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContexta0" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::CLandscapeVegetableBlockCreateContext" ></a><p>
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          <td class="md" nowrap valign="top"> NL3D::CLandscapeVegetableBlockCreateContext::CLandscapeVegetableBlockCreateContext </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
        </tr>

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    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="a05876.html#l00277">277</a> of file <a class="el" href="a05876.html">landscape_vegetable_block.cpp</a>.
<p>
<div class="fragment"><pre>00278 {
00279         <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a>= NULL;
00280 }
</pre></div>    </td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContexta1" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::eval" ></a><p>
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          <td class="md" nowrap valign="top"> void NL3D::CLandscapeVegetableBlockCreateContext::eval </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>ts</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>tt</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>float&nbsp;</td>
          <td class="mdname" nowrap> <em>x</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>float&nbsp;</td>
          <td class="mdname" nowrap> <em>y</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap><a class="el" href="a03128.html">CVector</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>pos</em></td>
        </tr>
        <tr>
          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
        </tr>

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    </td>
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    <td>
      &nbsp;
    </td>
    <td>

<p>
If Empty, create all the necessary information from patch. Then compute requested Pos, from the tile ts,tt, and pos in this tile. <dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign=top><em>ts,tt</em>&nbsp;</td><td>coordinate of the tile. </td></tr>
    <tr><td valign=top><em>x,y</em>&nbsp;</td><td>coordinate [0..1] in the tile.</td></tr>
  </table>
</dl>

<p>
Definition at line <a class="el" href="a05876.html#l00295">295</a> of file <a class="el" href="a05876.html">landscape_vegetable_block.cpp</a>.
<p>
References <a class="el" href="a05877.html#l00144">_Empty</a>, <a class="el" href="a06155.html#l01338">NL3D::CPatch::computeVertex()</a>, <a class="el" href="a06156.html#l00392">NL3D::CPatch::getOrderS()</a>, <a class="el" href="a06156.html#l00393">NL3D::CPatch::getOrderT()</a>, <a class="el" href="a06492.html#l00045">NL3D_TESSBLOCK_TILESIZE</a>, <a class="el" href="a05622.html#l00290">nlassert</a>, <a class="el" href="a05646.html#l00977">s</a>, <a class="el" href="a05646.html#l00985">t</a>, <a class="el" href="a05981.html#l00105">uint</a>, <a class="el" href="a05646.html#l00236">x</a>, and <a class="el" href="a05646.html#l00236">y</a>.
<p>
Referenced by <a class="el" href="a06162.html#l00050">NL3D::CPatch::generateTileVegetable()</a>.
<p>
<div class="fragment"><pre>00296 {
00297         <a class="code" href="a04199.html#a6">nlassert</a>(NL3D_TESSBLOCK_TILESIZE==4);
00298 
00299         <span class="comment">// If never created, do it now</span>
00300         <span class="comment">// ==================</span>
00301         <span class="keywordflow">if</span>(<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">_Empty</a>)
00302         {
00303                 <span class="comment">// Eval Position and normals for the 9 vertices (around the 2x2 tiles)</span>
00304                 <span class="keywordflow">for</span>(<a class="code" href="a04558.html#a15">uint</a> j=0; j&lt;3;j++)
00305                 {
00306                         <span class="keywordtype">float</span>   <a class="code" href="a04223.html#a627">t</a>= (<span class="keywordtype">float</span>)(<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr4">_Tt</a>+j)/<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a>-&gt;getOrderT();
00307                         <span class="keywordflow">for</span>(<a class="code" href="a04558.html#a15">uint</a> i=0; i&lt;3;i++)
00308                         {
00309                                 <span class="keywordtype">float</span>   <a class="code" href="a04223.html#a626">s</a>= (<span class="keywordtype">float</span>)(<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr3">_Ts</a>+i)/<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a>-&gt;getOrderS();
00310                                 <span class="comment">// eval position.</span>
00311                                 <span class="comment">// use computeVertex() and not bpatch-&gt;eval() because vegetables must follow the </span>
00312                                 <span class="comment">// noise (at least at tile precision...). It is slower but necessary.</span>
00313                                 <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr2">_Pos</a>[j*3+i]= <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a>-&gt;computeVertex(s, t);
00314                         }
00315                 }
00316 
00317                 <span class="comment">// Ok, it's done</span>
00318                 <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">_Empty</a>= <span class="keyword">false</span>;
00319         }
00320 
00321 
00322         <span class="comment">// Eval, with simple bilinear</span>
00323         <span class="comment">// ==================</span>
00324         <a class="code" href="a04199.html#a6">nlassert</a>(ts==_Ts || ts==_Ts+1);
00325         <a class="code" href="a04199.html#a6">nlassert</a>(tt==_Tt || tt==_Tt+1);
00326         <a class="code" href="a04558.html#a15">uint</a>    ds= ts-<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr3">_Ts</a>;
00327         <a class="code" href="a04558.html#a15">uint</a>    dt= tt-<a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr4">_Tt</a>;
00328         <span class="comment">// Indices.</span>
00329         <a class="code" href="a04558.html#a15">uint</a>    v00= dt*3 + ds;
00330         <a class="code" href="a04558.html#a15">uint</a>    v10= v00 + 1;
00331         <a class="code" href="a04558.html#a15">uint</a>    v01= v00 + 3;
00332         <a class="code" href="a04558.html#a15">uint</a>    v11= v00 + 4;
00333         <span class="comment">// BiLinearFactor.</span>
00334         <span class="keywordtype">float</span>   dxdy= (1-<a class="code" href="a04223.html#a572">x</a>)*(1-<a class="code" href="a04223.html#a573">y</a>);
00335         <span class="keywordtype">float</span>   dx2dy= <a class="code" href="a04223.html#a572">x</a>*(1-<a class="code" href="a04223.html#a573">y</a>);
00336         <span class="keywordtype">float</span>   dxdy2= (1-<a class="code" href="a04223.html#a572">x</a>)*<a class="code" href="a04223.html#a573">y</a>;
00337         <span class="keywordtype">float</span>   dx2dy2= <a class="code" href="a04223.html#a572">x</a>*<a class="code" href="a04223.html#a573">y</a>;
00338 
00339         <span class="comment">// Compute Pos.</span>
00340         pos = <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr2">_Pos</a>[v00] * dxdy;
00341         pos+= _Pos[v10] * dx2dy;
00342         pos+= _Pos[v01] * dxdy2;
00343         pos+= _Pos[v11] * dx2dy2;
00344 }
</pre></div>    </td>
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<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContexta2" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::init" ></a><p>
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          <td class="md" nowrap valign="top"> void NL3D::CLandscapeVegetableBlockCreateContext::init </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="a03057.html">CPatch</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>patch</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>ts</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap><a class="el" href="a04558.html#a15">uint</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>tt</em></td>
        </tr>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>

<p>
Definition at line <a class="el" href="a05876.html#l00284">284</a> of file <a class="el" href="a05876.html">landscape_vegetable_block.cpp</a>.
<p>
References <a class="el" href="a05877.html#l00144">_Empty</a>, <a class="el" href="a05622.html#l00290">nlassert</a>, and <a class="el" href="a05981.html#l00105">uint</a>.
<p>
Referenced by <a class="el" href="a05876.html#l00155">NL3D::CLandscapeVegetableBlock::update()</a>.
<p>
<div class="fragment"><pre>00285 {
00286         <a class="code" href="a04199.html#a6">nlassert</a>(patch);
00287         <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">_Empty</a>= <span class="keyword">true</span>;
00288         <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">_Patch</a>= patch;
00289         <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr3">_Ts</a>= ts;
00290         <a class="code" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr4">_Tt</a>= tt;
00291 }
</pre></div>    </td>
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<hr><h2>Field Documentation</h2>
<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr0" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Empty" ></a><p>
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          <td class="md" nowrap valign="top"> bool <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">NL3D::CLandscapeVegetableBlockCreateContext::_Empty</a><code> [private]</code>
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<p>

<p>
Definition at line <a class="el" href="a05877.html#l00144">144</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.
<p>
Referenced by <a class="el" href="a05876.html#l00295">eval()</a>, and <a class="el" href="a05876.html#l00284">init()</a>.    </td>
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<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr1" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Patch" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="a03057.html">CPatch</a>* <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr1">NL3D::CLandscapeVegetableBlockCreateContext::_Patch</a><code> [private]</code>
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Definition at line <a class="el" href="a05877.html#l00145">145</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.    </td>
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<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr2" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Pos" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="a03128.html">CVector</a> <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr2">NL3D::CLandscapeVegetableBlockCreateContext::_Pos</a>[ 9 ]<code> [private]</code>
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Definition at line <a class="el" href="a05877.html#l00149">149</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.    </td>
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<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr3" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Ts" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="a04558.html#a15">uint</a> <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr3">NL3D::CLandscapeVegetableBlockCreateContext::_Ts</a><code> [private]</code>
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Coordinate of the lower-left tile. 2x2 tile vegetables are generated. 
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Definition at line <a class="el" href="a05877.html#l00147">147</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.    </td>
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<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr4" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Tt" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="a04558.html#a15">uint</a> <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr4">NL3D::CLandscapeVegetableBlockCreateContext::_Tt</a><code> [private]</code>
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Coordinate of the lower-left tile. 2x2 tile vegetables are generated. 
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Definition at line <a class="el" href="a05877.html#l00147">147</a> of file <a class="el" href="a05877.html">landscape_vegetable_block.h</a>.    </td>
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a05877.html">landscape_vegetable_block.h</a><li><a class="el" href="a05876.html">landscape_vegetable_block.cpp</a></ul>
<hr size="1"><address style="align: right;"><small>Generated on Tue Mar 16 06:49:18 2004 for NeL by
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