NMLTutorial/Version check - Revision history

FooBar: /* If block */ is possible inside item block

2014-08-02T19:45:49Z

If block: is possible inside item block

← Older revision		Revision as of 19:45, 2 August 2014
Line 15:		Line 15:
	</pre>		</pre>

	The <code><condition></code> usually is a [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables general variable] or GRF parameter compared against a static value, a different variable or a different parameter. The <code><code_executed_when_condition_true></code> can be anything you would normally write in an NML file, so you can have one or more blocks inside an if block. However, you cannot have if blocks inside other blocks (except other if or else blocks). The code inside the if block is only executed when the <code><condition></code> is true.		The <code><condition></code> usually is a [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables general variable] or GRF parameter compared against a static value, a different variable or a different parameter. The <code><code_executed_when_condition_true></code> can be anything you would normally write in an NML file, so you can have one or more blocks inside an if block. However, you cannot have if blocks inside other blocks (except other if or else blocks and item blocks). The code inside the if block is only executed when the <code><condition></code> is true.

	=== <condition> ===		=== <condition> ===
Line 93:		Line 93:

	With this, if the first comparison is false, you make a different comparison and when even that is false you get the ''else''. You can have as many else if blocks between an if block and an else block as you want. Again no other code may appear inbetween those blocks (but of course you can have any code you like inside these blocks).		With this, if the first comparison is false, you make a different comparison and when even that is false you get the ''else''. You can have as many else if blocks between an if block and an else block as you want. Again no other code may appear inbetween those blocks (but of course you can have any code you like inside these blocks).


	== Error function ==		== Error function ==

FooBar: expand with if block and error function theory

2011-08-29T18:11:29Z

expand with if block and error function theory

Show changes

FooBar: Add bottom navbar

2011-08-27T21:50:34Z

Add bottom navbar

← Older revision		Revision as of 21:50, 27 August 2011
Line 33:		Line 33:
	}		}
	</pre>		</pre>

			{{NMLTutorialNavbar\|Object graphics\|Object slopes}}

Planetmaker: add NMLTutoral menu

2011-08-26T09:02:39Z

add NMLTutoral menu

← Older revision		Revision as of 09:02, 26 August 2011
Line 1:		Line 1:
			{{NMLTutorial}}

	Version checks in NML are actually pretty straight forward.		Version checks in NML are actually pretty straight forward.

Planetmaker: use common style for


2011-08-26T09:01:15Z
use common style for <code>

				
				
				
				
				
				← Older revision
				Revision as of 09:01, 26 August 2011
				

  Line 1:
  Line 1:


  
  Version checks in NML are actually pretty straight forward.
  
  Version checks in NML are actually pretty straight forward.


  
  

  
  



  
  NML provides the [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables global variables] <code style="color:darkgreen">openttd_version</code> and <code style="color:darkgreen">ttd_platform</code>. Concerning version checks the built-in [http://newgrf-specs.tt-wiki.net/wiki/NML:Builtin_functions function] <code style="color:darkgreen">version_openttd</code> comes in very handy as it provides an easy means to specify the version instead of manually constructing the version number corresponding to a specific version.
  
  NML provides the [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables global variables] <code>openttd_version</code> and <code>ttd_platform</code>. Concerning version checks the built-in [http://newgrf-specs.tt-wiki.net/wiki/NML:Builtin_functions function] <code>version_openttd</code> comes in very handy as it provides an easy means to specify the version instead of manually constructing the version number corresponding to a specific version.


  
  

  
  



  
  Thus checking for the TTD platform is simply done by an if block:
  
  Thus checking for the TTD platform is simply done by an if block:



Planetmaker: how to do version checks
2011-08-26T07:58:24Z
how to do version checks
New page
Version checks in NML are actually pretty straight forward.



NML provides the [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables global variables] <code style="color:darkgreen">openttd_version</code> and <code style="color:darkgreen">ttd_platform</code>. Concerning version checks the built-in [http://newgrf-specs.tt-wiki.net/wiki/NML:Builtin_functions function] <code style="color:darkgreen">version_openttd</code> comes in very handy as it provides an easy means to specify the version instead of manually constructing the version number corresponding to a specific version.



Thus checking for the TTD platform is simply done by an if block:

<pre>

if (ttd_platform != PLATFORM_OPENTTD) {

	error(FATAL, REQUIRES_OPENTTD, string(STR_MIN_OPENTTD_VERSION));

	exit;

}

</pre>



as is the check for a specific OpenTTD (and similarily TTDPatch) version:

<pre>

/* Only define cargo_age_period when that property is available */

if (openttd_version > version_openttd(1, 2, 0, 22713)) {

	item (FEAT_TRAINS, my_engine) {

		property {

			cargo_age_period: 200;

		}

	}

}

</pre>



It's also possible to combine these checks into a single block:

<pre>

/* Long date string codes require OpenTTD > 1.2.0 or r22780 */

if (ttd_platform != PLATFORM_OPENTTD || openttd_version < version_openttd(1, 2, 0, 22780)) {

	error(FATAL, REQUIRES_OPENTTD, string(STR_MIN_OPENTTD_VERSION));

	exit;

}

</pre>

← Older revision		Revision as of 09:01, 26 August 2011
Line 1:		Line 1:
	Version checks in NML are actually pretty straight forward.		Version checks in NML are actually pretty straight forward.

	NML provides the [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables global variables] <code ~~style="color:darkgreen"~~>openttd_version</code> and <code ~~style="color:darkgreen"~~>ttd_platform</code>. Concerning version checks the built-in [http://newgrf-specs.tt-wiki.net/wiki/NML:Builtin_functions function] <code ~~style="color:darkgreen"~~>version_openttd</code> comes in very handy as it provides an easy means to specify the version instead of manually constructing the version number corresponding to a specific version.		NML provides the [http://newgrf-specs.tt-wiki.net/wiki/NML:General#General_variables global variables] <code>openttd_version</code> and <code>ttd_platform</code>. Concerning version checks the built-in [http://newgrf-specs.tt-wiki.net/wiki/NML:Builtin_functions function] <code>version_openttd</code> comes in very handy as it provides an easy means to specify the version instead of manually constructing the version number corresponding to a specific version.

	Thus checking for the TTD platform is simply done by an if block:		Thus checking for the TTD platform is simply done by an if block: