https://wiki.blender.jp/index.php?action=history&feed=atom&title=Doc%3AGlossary%2FNabla 2026-05-19T21:32:12Z このウィキのこのページに関する変更履歴 MediaWiki 1.31.0 https://wiki.blender.jp/index.php?title=Doc:Glossary/Nabla&diff=99737&oldid=prev 2018-06-28T19:38:56Z

<p>1版 をインポートしました</p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr class="diff-title" lang="ja"> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">← 古い版</td> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">2018年6月28日 (木) 19:38時点における版</td> </tr><tr><td colspan="2" class="diff-notice" lang="ja"><div class="mw-diff-empty">(相違点なし)</div> </td></tr></table>

Yamyam https://wiki.blender.jp/index.php?title=Doc:Glossary/Nabla&diff=99736&oldid=prev 2011-10-15T09:54:57Z

<p>moved <a href="/Doc:Reference/Glossary/Nabla" class="mw-redirect" title="Doc:Reference/Glossary/Nabla">Doc:Reference/Glossary/Nabla</a> to <a href="/Doc:Glossary/Nabla" title="Doc:Glossary/Nabla">Doc:Glossary/Nabla</a></p> <p><b>新規ページ</b></p><div>&lt;noinclude&gt;&lt;/noinclude&gt;<br /> &lt;noinclude&gt;<br /> [[Category:Mesh]]<br /> &lt;/noinclude&gt;<br /> == Nabla ==<br /> Almost all procedural textures in Blender use derivatives for calculating normals for texture mapping (with as exception [[#Blend|Blend]] and [[#Magic|Magic]]). The texture normal, the derivative, is calculated by using four samples in the texture formula:<br /> <br /> &lt;source lang=&quot;python&quot;&gt;<br /> s0= texture(x, y, z)<br /> s1= texture(x+nabla, y, z)<br /> s2= texture(x, y+nabla, z)<br /> s3= texture(x, y, z+nabla)<br /> <br /> normal[0]= s0-s1<br /> normal[1]= s0-s2<br /> normal[2]= s0-s3 <br /> &lt;/source&gt;<br /> <br /> Up to now, the &quot;nabla&quot; offset was a constant (0.025) which worked fine in most cases, but doesn't give proper control over the way a texture is sampled, for example to make the effect smoother or sharper. This feature especially is useful in combination with the ColorBand feature.</div>

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