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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
+<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>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <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>
+ </tr>
+</table>
+<hr><h2>Member Function Documentation</h2>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContexta1" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::eval" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <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>
+ </tr>
+</table>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContexta2" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::init" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+ <tr>
+ <td></td>
+ <td class="md">)&nbsp;</td>
+ <td class="md" colspan="2"></td>
+ </tr>
+
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<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>
+ </tr>
+</table>
+<hr><h2>Field Documentation</h2>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr0" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Empty" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <td class="md" nowrap valign="top"> bool <a class="el" href="a02719.html#NL3D_1_1CLandscapeVegetableBlockCreateContextr0">NL3D::CLandscapeVegetableBlockCreateContext::_Empty</a><code> [private]</code>
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<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>
+ </tr>
+</table>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr1" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Patch" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<p>
+
+<p>
+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>
+ </tr>
+</table>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr2" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Pos" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<p>
+
+<p>
+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>
+ </tr>
+</table>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr3" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Ts" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<p>
+Coordinate of the lower-left tile. 2x2 tile vegetables are generated.
+<p>
+
+<p>
+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>
+ </tr>
+</table>
+<a class="anchor" name="NL3D_1_1CLandscapeVegetableBlockCreateContextr4" doxytag="NL3D::CLandscapeVegetableBlockCreateContext::_Tt" ></a><p>
+<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
+ <tr>
+ <td class="mdRow">
+ <table cellpadding="0" cellspacing="0" border="0">
+ <tr>
+ <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>
+ </table>
+ </td>
+ </tr>
+</table>
+<table cellspacing=5 cellpadding=0 border=0>
+ <tr>
+ <td>
+ &nbsp;
+ </td>
+ <td>
+
+<p>
+Coordinate of the lower-left tile. 2x2 tile vegetables are generated.
+<p>
+
+<p>
+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>
+ </tr>
+</table>
+<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
+<a href="http://www.doxygen.org/index.html">
+<img src="doxygen.png" alt="doxygen" align="middle" border=0 >
+</a>1.3.6 </small></address>
+</body>
+</html>