Reference:Scene Description Language - Revision history

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New page

{{#indexentry:Scene Description Language|scene, description language}}

The reference section describes the POV-Ray scene description
language. It is supposed to be used as a reference for looking up
things. It does not contain detailed explanations on how scenes are written
or how POV-Ray is used. It just explains all features, their syntax,
applications, limits, drawbacks, etc.

The scene description language allows you to describe the world in a
readable and convenient way. Files are created in plain ASCII text using an
editor of your choice. The input file name is specified using the <code>
Input_File_Name</code>=file option or <code>+I</code>file
switch. By default the files have the extension <code>.pov</code>. POV-Ray
reads the file, processes it by creating an internal model of the scene and
then renders the scene.

The overall syntax of a scene is shown below. See [[Reference:Notation_and_Basic_Assumptions|Notation and Basic Assumptions]]
for more information on syntax notation.
<pre>
SCENE:
SCENE_ITEM...
SCENE_ITEM:
LANGUAGE_DIRECTIVE |
CAMERA |
LIGHT |
OBJECT |
ATMOSPHERIC_EFFECT |
GLOBAL_SETTINGS
</pre>

In plain English, this means that a scene contains one or more scene items
and that a scene item may be any of the five items listed below it. The items
may appear in any order. None is a required item. In addition to the syntax
depicted above, a LANGUAGE_DIRECTIVE may also appear anywhere
embedded in other statements between any two tokens. There are some
restrictions on nesting directives also.

For details on those five items see section [[Reference:Language Directives|Language Directives]], section [[Reference:Object|:Object|Objects]], section [[Reference:Camera|:Camera|Camera]], section [[Atmospheric Effects|:Atmospheric Effects|Atomospheric Effects]] and section [[Global Settings|:global_settings|Global Settings]] for details.

==Language Basics==
The POV-Ray language consists of identifiers, reserved keywords, floating
point expressions, strings, special symbols and comments. The text of a
POV-Ray scene file is free format. You may put statements on separate lines
or on the same line as you desire. You may add blank lines, spaces or
indentations as long as you do not split any keywords or identifiers.

@@ Line 1: / Line 1: @@
-{{#indexentry:Scene Description Language|scene, description language}}
+{{#indexentry:Scene Description Language}}
 <!--<sectiondesc desc=<"language reference">--->
 <p>This section describes the POV-Ray <em>scene description

@@ Line 1: / Line 1: @@
 {{#indexentry:Scene Description Language|scene, description language}}
 <!--<sectiondesc desc=<"language reference">--->
-<p>The reference section describes the POV-Ray <em>scene description
+<p>This section describes the POV-Ray <em>scene description
 language</em>. It is supposed to be used as a reference for looking up
 things. It does not contain detailed explanations on how scenes are written

@@ Line 15: / Line 15: @@
 then renders the scene.</p>
 <p>
-The overall syntax of a scene is shown below. See <!--<linkto "Notation and Basic Assumptions">Notation and Basic Assumptions</linkto>--->[[Reference:Notation_and_Basic_Assumptions|Notation and Basic Assumptions]]
+The overall syntax of a scene is shown below. See [[Reference:Notation and Basic Assumptions|Notation and Basic Assumptions]]
 for more information on syntax notation.</p>
 <pre>
@@ Line 36: / Line 36: @@
 restrictions on nesting directives also.</p>
 <p>
-For details on those five items see section [[Reference:Language Directives|Language Directives]], section [[Reference:Object|:Object|Objects]], section [[Reference:Camera|:Camera|Camera]], section [[Atmospheric Effects|:Atmospheric Effects|Atomospheric Effects]] and section [[Global Settings|:global_settings|Global Settings]] for details.</p>
+For details on those five items see section [[Reference:Language Directives|Language Directives]], section [[Reference:Object|:Object|Objects]], section [[Reference:Camera|:Camera|Camera]], section [[Reference:Atmospheric Effects|:Atmospheric Effects|Atomospheric Effects]] and section [[Reference:Global Settings|:global_settings|Global Settings]] for details.</p>

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