Documentation:Tutorial Section 3.2 - Revision history

Clipka: Indexentries fix

2016-12-16T14:20:04Z

Indexentries fix

2016-12-07T21:26:08Z

navigation

2016-12-07T21:22:51Z

added out of place section

2012-08-08T13:11:22Z

1 revision: reference layout changes

2012-08-07T01:32:01Z

cleanup round 2

2012-07-23T19:27:50Z

1 revision: link repair

2012-07-21T11:19:19Z

link repair

2012-07-02T22:16:30Z

move tag to outside of link

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@@ Line 7: / Line 7: @@
 <br>
 <!--</wikitalk>--->
 {{#indexentry:isosurface, tutorial}}
 <p>Isosurfaces are shapes described by mathematical functions.</p>
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 <p>Make sure your <code>contained_by</code> object fits as tightly as possible. An oversized container can sky-rocket the render time. When the container has a lot of empty space around the actual isosurface, POV-Ray has to do a lot of superfluous sampling: especially with complex functions this can become very time consuming. On top of this, the <code>max_gradient</code> needed to get a proper surface will also increase rapidly, almost proportional to the oversize! You could use a transparent copy of the container (using exactly the same transformations) to check how it fits. Getting the <code>min_extent</code> and <code>max_extent</code> of the isosurface is not useful because it only gives the extent of the container and not of the actual isosurface.</p>
 {{#indexentry:poly, tutorial}}
 <p>The polynomial object (and its <em>shortcut</em> versions: <!--<linkto "cubic">cubic</linkto>---><code>[[Reference:Cubic|cubic]]</code>, <!--<linkto "quartic">quartic</linkto>---><code>[[Reference:Quartic|quartic]]</code> and <!--<linkto "quadric">quadric</linkto>---><code>[[Reference:Quadric|quadric]]</code>)
 of POV-Ray is one of the most complex and mathematical primitives of the program. One could think that it is seldom

@@ Line 1,075: / Line 1,075: @@
 <table width=100% border=0 cellspacing=0 cellpadding=5>
 <tr><td width=50% bgcolor=#EEEEEF>
-[[Documentation:Tutorial Section 3.1#Isosurface Object|Isosurface Object]]</td>
+[[Documentation:Tutorial Section 3.1#Height Field Object|Height Field Object]]</td>
 <td width=50% bgcolor=#EEEEEF align=right>
 [[Documentation:Tutorial Section 3.3#Superquadric Ellipsoid Object|Superquadric Ellipsoid Object]]</td></tr>

@@ Line 7: / Line 7: @@
 <br>
 <!--</wikitalk>--->
-<!--REMOVE--->====Isosurface Object====<!--THIS--->
+{{#indexentry:isosurface, tutorial}}
 =====Simple functions=====
 <p>Let's begin with something simple. In this first series of images, let's explore the <!--<linkto "Functions, user-defined">user defined function</linkto>--->[[Reference:Function|user defined function]] shown as <code>function&nbsp;{&nbsp;x&nbsp;}</code> that we see in the code example below. It produces the first image on the left, a simple box. The container, which is a requirement for the isosurface object, is represented by the box object and the <code>contained_by</code> keyword in the isosurface definition.</p>

@@ Line 284: / Line 284: @@
 =====Combining isosurface functions=====
-<p>We can also simulate some Constructive Solid Geometry with isosurface functions.  If you do not know about CSG we suggest you have a look at <em>[[Documentation:Tutorial Section 2#What is CSG?|What is CSG?]]</em> or the corresponding part of the [[Reference:Object#Constructive Solid Geometry|reference section]] first.</p>
+<p>We can also simulate some Constructive Solid Geometry with isosurface functions.  If you do not know about CSG we suggest you have a look at <em>[[Documentation:Tutorial Section 2#What is CSG?|What is CSG?]]</em> or the corresponding part of the [[Reference:Constructive Solid Geometry|reference section]] first.</p>
 <p>For this next group of images, consider the two functions for a cylinder and a rotated box:</p>

@@ Line 374: / Line 374: @@
 <ul>
 <li><code>f_noise3d(x,y,z)</code><br>
-uses the [[Reference:Pattern#Noise Generators|noise generator]] specified in <code>global_settings</code> and generates structures like the bozo pattern.</li>
+uses the [[Reference:Pattern Modifiers#Noise Generators|noise generator]] specified in <code>global_settings</code> and generates structures like the bozo pattern.</li>
 <li><code>f_noise_generator(x, y, z, noise_generator)</code><br>
 generates noise with a specified noise generator.</li>

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