NML:Testing for other NewGRFs

NewGRF Meta Language

Preface

Getting started

Graphics files

Blocks

Units

Expressions

Elementary values

Builtin functions

Language files

Lists of props, vars and CBs

Warnings

Additional references

NewGRF compatibility

Deprecated syntax

Changes from NML 0.2 to 0.3

Changes from NML 0.3 to 0.4

Changes from NML 0.4 to 0.5

Vehicles, Stations, Canals, Bridges, Towns, Houses, Industries (Tiles), Cargos, Airports+Tiles, Objects, Railtypes, Roadtypes, Tramtypes, Terrain

NML Tutorial

Block Syntax

GRF

• GRF parameters

Item

• Property
• Graphics
• Livery override

Realsprites

Recolour sprites

Template

Spriteset

Spritegroup

Spritelayout

Tilelayout

Switch

Produce

Random switch

Cargotable

Railtypetable / Roadtypetable / Tramtypetable

If/else

While

Error

Disable items

Deactivate other NewGRFs

Testing for other NewGRFs

Overriding vehicles in other NewGRFs

Sprite replacement

• Replace TTD sprites
• Replace new sprites
• Add font glyphs

Alternative (32bpp) sprites

Town names

• Town names parts

Snow line

Parameter assignment

Setting base costs

Sorting vehicles in the purchase list

See the builtin functions for the functions grf_XXX. Additionally - when the presence of a NewGRF is established - their parameters can be of interest and queried. The general syntax is

identifier = param[<grfID>, <param#>]

For example

 other_newgrfs_param0 = param["NML\01", 0];
 other_newgrf_no_high_cost = param["NML\01", 1] < 5;

reads parameter 1 (the first one, counting starts at 0) from the NewGRF with the grfID "NML\01".

There's a special parameter, 254: That reports back the version of that NewGRF as set in its grf definition (e.g. via the version property in the grf block)