ReadingOtherGRFParameters: Difference between revisions

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Latest revision as of 16:55, 18 March 2015

Introduction

Since TTDPatch 2.0.1 alpha 16, it has been possible to use action D to read the parameters of other GRF files. With this, you can try to use the settings for another related GRF before falling back to a hard coded default.

Format

 <Sprite-number> * <Length> 0D <target> 00 <param> FE <GRFID>

Element	Size	Description
0D	B	Defines action 0D
<target>	B	Target parameter
<param>	B	Parameter number of the other GRF file that you want to read
FE	B	Defines a special variable access
<GRFID>	D	The GRFID whose parameter you want to read

This will store parameter <param> of the GRF file with GRFID <GRFID> into the <target>

With parameter FE you can read the action 14 NewGRF version of another NewGRF in OpenTTD. It returns 0 if no NewGRF version has been set by an action 14.

If the GRFID cannot be found, or if the parameter is not defined, a value of 0 is used instead (no matter whether bit 7 of the operation is set or not).

@@ Line 1: / Line 1: @@
+==Introduction==
+Since TTDPatch 2.0.1 alpha 16, it has been possible to use action D to read the parameters of other GRF files. With this, you can try to use the settings for another related GRF before falling back to a hard coded default.
-'''''Reading another GRF file's parameters'''''
+== Format ==
-==Reading another GRF file's parameters==
+<pre> &lt;Sprite-number&gt; * &lt;Length&gt; 0D &lt;target&gt; 00 &lt;param&gt; FE &lt;GRFID&gt;</pre>
--=Introduction=-
+{| class="wikitable"
-Since 2.0.1 alpha 16, it has been possible to use action D to read the parameters of other GRF files. With this, you can try to use the settings for another related GRF before falling back to a hard coded default.
+|-
+!'''Element'''
+![[GRFActionsDetailed|'''Size''']]
+!'''Description'''
+|-
+|0D
+|B
+|Defines action 0D
+|-
+|&lt;target&gt;
+|B
+|Target parameter
+|-
+|&lt;param&gt;
+|B
+|Parameter number of the other GRF file that you want to read
+|-
+|FE
+|B
+|Defines a special variable access
+|-
+|&lt;GRFID&gt;
+|D
+|The GRFID whose parameter you want to read
+|}
+This will store parameter &lt;param&gt; of the GRF file with GRFID &lt;GRFID&gt; into the &lt;target&gt;
--=Format=-
-<pre> -+&lt;Sprite-number&gt; * &lt;Length&gt; 0D &lt;target&gt; &lt;operation&gt; &lt;param&gt; FE &lt;grfid&gt;+-</pre>
-||'''Element'''|[[GRFActionsDetailed|'''Size''']]|'''Description'''
-D|B|Defines action 0D
-&lt;target&gt;|B|Target parameter
-&lt;operation&gt;|B|As for [[ActionD#operation|action D]], but only assignment is valid.
-&lt;param&gt;|B|Parameter number of the other GRF file that you want to read
-FE|B|Defines a special variable access
-&lt;grfid&gt;|D|The GRFID whose parameter you want to read||
-This will store parameter &lt;param&gt; of the GRF file with grfid &lt;grfid&gt; into the &lt;target&gt;
 With parameter FE you can read the action 14 NewGRF version of another NewGRF in OpenTTD. It returns 0 if no NewGRF version has been set by an action 14.
-If the GRF ID cannot be found, or if the parameter is not defined, a value of 0 is used instead (no matter whether bit 7 of the operation is set or not).
+If the GRFID cannot be found, or if the parameter is not defined, a value of 0 is used instead (no matter whether bit 7 of the operation is set or not).

ReadingOtherGRFParameters: Difference between revisions

Latest revision as of 16:55, 18 March 2015

Introduction

Format

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