Difference between revisions of "ReadingOtherGRFParameters"

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(if only assignment is valid, then put it directly into the syntax)
 
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==Introduction==
   
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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.
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'''''Reading another GRF file's parameters'''''
  
   
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== Format ==
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==Reading another GRF file's parameters==
  
   
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<pre> &lt;Sprite-number&gt; * &lt;Length&gt; 0D &lt;target&gt; 00 &lt;param&gt; FE &lt;GRFID&gt;</pre>
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-=Introduction=-
  
   
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{| 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.
  
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|-
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!'''Element'''
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![[GRFActionsDetailed|'''Size''']]
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!'''Description'''
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|-
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|0D
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|B
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|Defines action 0D
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|-
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|&lt;target&gt;
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|B
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|Target parameter
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|-
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|&lt;param&gt;
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|B
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|Parameter number of the other GRF file that you want to read
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|-
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|FE
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|B
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|Defines a special variable access
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|-
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|&lt;GRFID&gt;
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|D
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|The GRFID whose parameter you want to read
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|}
   
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This will store parameter &lt;param&gt; of the GRF file with GRFID &lt;GRFID&gt; into the &lt;target&gt;
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-=Format=-
  
   
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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.
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<pre> -+&lt;Sprite-number&gt; * &lt;Length&gt; 0D &lt;target&gt; &lt;operation&gt; &lt;param&gt; FE &lt;grfid&gt;+-</pre>
  
   
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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).
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||'''Element'''|[[GRFActionsDetailed|'''Size''']]|'''Description'''
  
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0D|B|Defines action 0D
  
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&lt;target&gt;|B|Target parameter
  
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&lt;operation&gt;|B|As for [[ActionD#operation|action D]], but only assignment is valid.
  
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&lt;param&gt;|B|Parameter number of the other GRF file that you want to read
  
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FE|B|Defines a special variable access
  
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&lt;grfid&gt;|D|The GRFID whose parameter you want to read||
  
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This will store parameter &lt;param&gt; of the GRF file with grfid &lt;grfid&gt; into the &lt;target&gt;
  
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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).
  

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).

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