Difference between revisions of "ReadingOtherGRFParameters"
From GRFSpecs
Jump to navigationJump to searchm (Removed extra title at top) |
(if only assignment is valid, then put it directly into the syntax) |
||
| (4 intermediate revisions by one other user not shown) | |||
| Line 1: | Line 1: | ||
==Introduction== |
==Introduction== |
||
| − | 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. |
+ | 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== |
+ | == Format == |
| − | <pre> |
+ | <pre> <Sprite-number> * <Length> 0D <target> 00 <param> FE <GRFID></pre> |
{| class="wikitable" |
{| class="wikitable" |
||
| Line 20: | Line 20: | ||
|B |
|B |
||
|Target parameter |
|Target parameter |
||
| − | |- |
||
| − | |<operation> |
||
| − | |B |
||
| − | |As for [[ActionD#operation|action D]], but only assignment is valid. |
||
|- |
|- |
||
|<param> |
|<param> |
||
| Line 33: | Line 29: | ||
|Defines a special variable access |
|Defines a special variable access |
||
|- |
|- |
||
| − | |< |
+ | |<GRFID> |
|D |
|D |
||
|The GRFID whose parameter you want to read |
|The GRFID whose parameter you want to read |
||
|} |
|} |
||
| − | This will store parameter <param> of the GRF file with |
+ | 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. |
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 |
+ | 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). |
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).
