View source for NML:Replace TTD sprites

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Using a <code style="color:darkgreen">replace</code> block, it is possible to replace TTD's built-in sprites or for base grfs to define sprites via the <code style="color:darkgreen">base_graphics</code> block. The syntax is as follows:

 replace(&lt;sprite-id&gt;, &lt;image-file&gt;) {
 	[[#real sprites|list of realsprites]]
 }

and

 base_graphics(&lt;sprite-id&gt;, &lt;image-file&gt;) {
 	[[#real sprites|list of realsprites]]
 }

respectively

The first parameter <code style="color:darkgreen">&lt;sprite-id&gt;</code> indicates the sprite number of the first sprite to replace. Sprite numbers are equal to the sprite numbers in the base graphics file. The [http://mz.openttdcoop.org/opengfx/authors/script.php?feature=spritesbyfile&q=ogfx1_base  OpenGFX author overview] can be used as a reference to look up these sprite numbers. The second parameter <code style="color:darkgreen">&lt;image-file&gt;</code> specifies the image file that contains the new sprites. A series of real sprites has to be specified between the curly braces (<code style="color:darkgreen">{</code> and <code style="color:darkgreen">}</code>). The first sprite in this list replaces the sprite with id <code style="color:darkgreen">sprite-id</code>, the second replaces <code style="color:darkgreen">sprite-id + 1</code> and so on. Sprite templates can be used as well. For example:

<pre style="color:blue">
 // Rail overlays for crossings
 replace (1005, "src/gfx/rails_overlays.png") {
 		[ 20,198, 40,21, -20,  5]
 		[ 71,198, 40,21, -20,  5]
 		[117,198, 40, 7, -20,  5]
 		[165,198, 40, 7, -20, 21]
 		[216,198, 12,19,  10,  5]
 		[248,198, 12,19, -24, 11]
 }
</pre>