dave/openttd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Documentation: Add NML documentation for non-standard NewGRF features

Browse Source
This commit is contained in:
Jonathan G Rennison
2020-10-19 19:43:57 +01:00
parent e51c585f45
commit 98f889f0ab
3 changed files with 92 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
README.md
View File

@@ -273,6 +273,7 @@ See [jgrpp-changelog.md](jgrpp-changelog.md) for changelog.
* Increase per-vehicle order limit from 254 to 64k. (added in v0.38.0). * Increase per-vehicle order limit from 254 to 64k. (added in v0.38.0).
* Various minor fixes, see changelog. * Various minor fixes, see changelog.
* [NewGRF specification additions](docs/newgrf-additions.html) ([online copy](https://htmlpreview.github.io/?https://github.com/JGRennison/OpenTTD-patches/blob/jgrpp/docs/newgrf-additions.html)). * [NewGRF specification additions](docs/newgrf-additions.html) ([online copy](https://htmlpreview.github.io/?https://github.com/JGRennison/OpenTTD-patches/blob/jgrpp/docs/newgrf-additions.html)).
* [NML specification additions](docs/newgrf-additions-nml.html) ([online copy](https://htmlpreview.github.io/?https://github.com/JGRennison/OpenTTD-patches/blob/jgrpp/docs/newgrf-additions-nml.html)).
* [Low-level code/performance changes](docs/jgrpp-low-level-changes.md). * [Low-level code/performance changes](docs/jgrpp-low-level-changes.md).
* Translations * Translations

89
docs/newgrf-additions-nml.html Normal file
View File

@@ -0,0 +1,89 @@
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JGR's Patchpack - Additions to NewGRF Specifications (NML)</title>
<style type="text/css">
td li { white-space: nowrap; text-align: left; }
th { white-space: nowrap; text-align: center; }
td, th { border: 1px solid #CCCCCC; padding: 0px 5px; }
table { border-collapse: collapse; empty-cells: show; }
span.code { font-family: "Courier New", Courier, mono; color: darkgreen; }
dt { font-weight: bold; }
</style>
</head>
<body>
<h2>Additions to NewGRF Specifications in JGR's Patchpack in NML</h2>
<p>This document describes non-standard additions to the <a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Main">Official OpenTTD NML Specifications</a> which are present in this patchpack and the associated <a href="https://github.com/JGRennison/nml">NML fork</a>.
<p>These additions MAY also be present in other patchpacks. They MAY be removed or moved in future, if necessary.</p>
<p>Not all standard NewGRF features are supported by NML, consequently not all non-standard additions to the specifications are supported by this patchpack's associated NML fork, or are listed in this document.<br />
See the associated <a href="newgrf-additions.html">non-NML document</a> for more details.</p>
<p>All of the non-standard features listed below will automatically emit suitable feature tests, conditionals, etc. such that NewGRFs which use these features will work correctly
on OpenTTD versions which do not support these features, including standard trunk OpenTTD and older/other patchpack versions.</p>
<h3><a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Railtypes#Railtype_properties">Railtypes properties</a></h3>
<table>
<tr><th>Property</th><th>Value range</th><th>Comment</th></tr>
<tr><td>enable_programmable_pre_signals</td><td>0 or 1</td>
<td>
Enable programmable pre-signal graphics in <a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Railtypes#signals">railtype signals</a>.<br />
Programmable pre-signals have a signal type (<span class="code">getbits(extra_callback_info2, 16, 8)</span>) of 6.
</td>
</tr>
<tr><td>enable_restricted_signals</td><td>0 or 1</td>
<td>
Enable restricted signal flag in <a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Railtypes#signals">railtype signals</a>.<br />
When enabled, bit 24 of variable <span class="code">extra_callback_info2</span> is set if the signal is restricted (has a routing restriction program attached).<br />
When enabled, the "Show restricted electric signals using default graphics" client setting and signal post recolouring is not applied.<br />
This flag must only be set if a different sprite is returned when bit 24 of <span class="code">extra_callback_info2</span> is set.
</td>
</tr>
</table>
<h3><a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Roadtypes#Roadtype_properties">Roadtype properties</a></h3>
<table>
<tr><th>Property</th><th>Value range</th><th>Comment</th></tr>
<tr><td>roadtype_extra_flags</td><td>bitmask(ROADTYPE_EXTRA_FLAG_XXX, ...)</td>
<td>
<dl>
<dt>NO_SCRIPT_BUILD</dt>
<dd>Scripts (AI/GS) may not build this roadtype</dd>
<dt>NO_TOWN_MODIFY</dt>
<dd>Towns may not modify tiles of this roadtype in any way whatsoever</dd>
</dl>
</td>
</tr>
</table>
<h3><a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Tramtypes#Tramtype_properties">Tramtype properties</a></h3>
<table>
<tr><th>Property</th><th>Value range</th><th>Comment</th></tr>
<tr><td>tramtype_extra_flags</td><td>bitmask(TRAMTYPE_EXTRA_FLAG_XXX, ...)</td>
<td>
<dl>
<dt>NO_SCRIPT_BUILD</dt>
<dd>Scripts (AI/GS) may not build this tramtype</dd>
<dt>NO_TOWN_MODIFY</dt>
<dd>Towns may not modify tiles of this tramtype in any way whatsoever</dd>
</dl>
</td>
</tr>
</table>
<h3><a href="https://newgrf-specs.tt-wiki.net/wiki/NML:Replace_new_sprites">Replace new sprites</a></h3>
<table>
<tr><th>Type</th><th>Number of sprites </th><th>Comment</th></tr>
<tr><td>PROGRAMMABLE_PRE_SIGNAL</td><td>32</td>
<td>
<b>Programmable pre-signals</b>
<p>Signal graphics come in groups of 16. These groups contain sprites in the same order as sprites 1275-1290 in trg1[r].grf and <a href="https://newgrf-specs.tt-wiki.net/wiki/Action5#04_Signal_graphics.">Action 5 type 4 (signals)</a>;
red, then green, for each of: SW-facing, NE-facing, NW-facing, SE-facing, E-facing, W-facing, S-facing, N-facing.
<table>
<tr><th>Group</th><th>Contents</th></tr>
<tr><td>0</td><td>Semaphore programmable pre-signals</td></tr>
<tr><td>1</td><td>Lighted programmable pre-signals</td></tr>
</table>
</td>
</tr>
</table>
</body>
</html>

3
docs/newgrf-additions.html
View File

@@ -21,6 +21,7 @@
<h2>Additions to NewGRF Specifications in JGR's Patchpack</h2> <h2>Additions to NewGRF Specifications in JGR's Patchpack</h2>
<p>This document describes non-standard additions to the <a href="https://newgrf-specs.tt-wiki.net/wiki/Main_Page">Official OpenTTD NewGRF Specifications</a> which are present in this patchpack. <p>This document describes non-standard additions to the <a href="https://newgrf-specs.tt-wiki.net/wiki/Main_Page">Official OpenTTD NewGRF Specifications</a> which are present in this patchpack.
<p>These additions MAY also be present in other patchpacks. They MAY be removed or moved in future, if necessary.</p> <p>These additions MAY also be present in other patchpacks. They MAY be removed or moved in future, if necessary.</p>
<p>A subset of the features listed below are also supported in a fork of NML, see the associated <a href="newgrf-additions-nml.html">NML document</a> for more details.</p>
<p>NewGRFs which use any of these features SHOULD use the <a href="#feature-test">feature testing</a> mechanism described below to check whether individual added features are supported.</p> <p>NewGRFs which use any of these features SHOULD use the <a href="#feature-test">feature testing</a> mechanism described below to check whether individual added features are supported.</p>
<h3 id="feature-test">Action 14 - Feature Tests</h3> <h3 id="feature-test">Action 14 - Feature Tests</h3>
@@ -225,7 +226,7 @@
<h4>Enable restricted signal flag for custom signal sprites (mappable property: railtype_enable_restricted_signals)</h4> <h4>Enable restricted signal flag for custom signal sprites (mappable property: railtype_enable_restricted_signals)</h4>
<p>This applies to <a href="https://newgrf-specs.tt-wiki.net/wiki/Action3/Railtypes#Signal_sprites_.280B.29">Action 2/3 - Railtype custom signal sprites</a>.<br /> <p>This applies to <a href="https://newgrf-specs.tt-wiki.net/wiki/Action3/Railtypes#Signal_sprites_.280B.29">Action 2/3 - Railtype custom signal sprites</a>.<br />
When enabled, bit 24 of variable 18 (extra callback info) is set if the signal is restricted (has a routing restriction program attached).<br /> When enabled, bit 24 of variable 18 (extra callback info) is set if the signal is restricted (has a routing restriction program attached).<br />
When enabled, the "Show restricted electric signals using default graphics" client setting is not applied.<br /> When enabled, the "Show restricted electric signals using default graphics" client setting and signal post recolouring is not applied.<br />
This flag should only be set if the Action 2/3 actually returns a different sprite when bit 24 of variable 18 is set. This flag should only be set if the Action 2/3 actually returns a different sprite when bit 24 of variable 18 is set.
The property length is 1 byte. 0 is disabled (default). 1 is enabled. The property length is 1 byte. 0 is disabled (default). 1 is enabled.
</p> </p>