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Add implementation of multi-aspect signalling and GRF support

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Requires realistic braking

See: #247
This commit is contained in:
Jonathan G Rennison
2021-08-28 12:51:06 +01:00
parent 6546f6deba
commit b2ef6c0de8
28 changed files with 917 additions and 35 deletions
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32
docs/newgrf-additions.html
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@@ -241,6 +241,22 @@
</table></p>
<p>The property length is 1 byte. 0 is disabled (default). 1 is enabled.</p>
<p>This is indicated by the feature name: <font face="monospace">action0_railtype_recolour</font>, version 1</p>
<h4 id="railtype_extra_aspects">Set number of additional signal aspects (mappable property: railtype_extra_aspects)</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 />
The value is the number of additional signal aspects to use (e.g. 4-aspect signalling should use a value of 2).<br />
When set, the lowest byte of variable 0x18 (SS: signal state) may have the given number of additional values starting from 02:
<table>
<tr><th>Value</th><th>Meaning</th></tr>
<tr><td>00</td><td>Red signal</td></tr>
<tr><td>01</td><td>Green signal</td></tr>
<tr><td>02</td><td>1st extra aspect (e.g. yellow)</td></tr>
<tr><td>03</td><td>2nd extra aspect (e.g. double yellow)</td></tr>
<tr><td>...</td><td>Further extra aspects...</td></tr>
</table></p>
<p>The property length is 1 byte.<br />
The provided value is currently clamped to be within the range 0 - 6 (inclusive).</p>
<p>N.B. Realistic braking must be enabled for additional signal aspects to be used.</p>
<p>This is indicated by the feature name: <font face="monospace">action0_railtype_extra_aspects</font>, version 1</p>
<h4 id="railtype_disable_realistic_braking">Disable use of realistic braking with this rail type (mappable property: railtype_disable_realistic_braking)</h4>
<p>When this property is set realistic braking is disabled for trains of this railtype even when realistic braking is otherwise in effect.<br />
The property length is 1 byte. 0 is realistic braking is not disabled for this railtype. 1 is disable realistic braking for this railtype.
@@ -319,6 +335,22 @@
The Action 0 Id field is not used, the value is ignored.
</p>
<p>This is indicated by the feature name: <font face="monospace">action0_signals_recolour</font>, version 1</p>
<h4 id="signals_extra_aspects">Set number of additional signal aspects (mappable property: signals_extra_aspects)</h4>
<p>This applies to <a href="#a3signals_custom_signal_sprites">Action 2/3 Signals (Feature 0E) custom signal sprites</a> for this GRF.<br />
The value is the number of additional signal aspects to use (e.g. 4-aspect signalling should use a value of 2).<br />
When set, the lowest byte of variable 0x18 (SS: signal state) may have the given number of additional values starting from 02:
<table>
<tr><th>Value</th><th>Meaning</th></tr>
<tr><td>00</td><td>Red signal</td></tr>
<tr><td>01</td><td>Green signal</td></tr>
<tr><td>02</td><td>1st extra aspect (e.g. yellow)</td></tr>
<tr><td>03</td><td>2nd extra aspect (e.g. double yellow)</td></tr>
<tr><td>...</td><td>Further extra aspects...</td></tr>
</table></p>
<p>The property length is 1 byte.<br />
The provided value is currently clamped to be within the range 0 - 6 (inclusive).</p>
<p>N.B. Realistic braking must be enabled for additional signal aspects to be used.</p>
<p>This is indicated by the feature name: <font face="monospace">action0_signals_extra_aspects</font>, version 1</p>
<br />
<br />
<h3 id="varaction2_station"><a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/Stations">Variational Action 2 - Stations</a></h3>