NML:Alternative sprites
Vehicles, Stations, Canals, Bridges, Towns, Houses, Industries (Tiles), Cargos, Airports+Tiles, Objects, Railtypes, Roadtypes, Tramtypes, Terrain
A alternative_sprites block allows you to specify alternative sprites (zoom levels and / or 32bpp) that are drop-in replacements for some real sprites in your grf. The syntax is as follows:
alternative_sprites(block_name, zoom_level, type[, filename[, mask_filename]]) {
list of realsprites
}
block_name is the name of the replace / base_graphics, replace_new, font_glyph or spriteset-block for which you want to provide alternative sprites. zoom_level can be
| name | tile size | description |
|---|---|---|
ZOOM_LEVEL_IN_4X |
256 x 124 | 4x zoom in |
ZOOM_LEVEL_IN_2X |
128 x 62 | 2x zoom in |
ZOOM_LEVEL_NORMAL |
64 x 31 | normal tile size |
ZOOM_LEVEL_OUT_2X |
32 x 15 | 2x zoom out |
ZOOM_LEVEL_OUT_4X |
16 x 7 | 4x zoom out |
ZOOM_LEVEL_OUT_8X |
8 x 3 | 8x zoom out |
The type argument specifies which kind of sprite follows. This may be either BIT_DEPTH_8BPP or BIT_DEPTH_32BPP.
Specifying a filename is optional, it's only useful if you have multiple sprites in the same file. If every sprite is in a separate file you'll have to specify the filename for each realsprite anyway, so you can leave it out of the alternative_sprites-block.
For 32bpp only, you can also specify a default filename to use for mask sprites. These (8bpp) sprites have the same size and offsets as the normal sprites and are used for recolouring purposes. See the real sprites page for more info.
The block then contains a list of real and/or recolour sprites. An example for an implementation
// Foster Express tram
spriteset(foster_express_set, "opengfx_generic_trams1.pcx") {
[ 48,56, 8,18, -3,-10]
[ 64,56, 20,19, -14, -5]
[ 96,56, 28,15, -14, -8]
[144,56, 20,19, -6, -7]
[176,56, 8,18, -3,-10]
[192,56, 20,19, -14, -9]
[224,56, 28,15, -14, -8]
[272,56, 20,19, -6, -7]
}
alternative_sprites(foster_express_set, ZOOM_LEVEL_IN_2X, BIT_DEPTH_8BPP, "opengfx_generic_trams1.pcx") {
[ 48,56, 8,18, -3,-10]
[ 64,56, 20,19, -14, -5]
[ 96,56, 28,15, -14, -8]
[144,56, 20,19, -6, -7]
[176,56, 8,18, -3,-10]
[192,56, 20,19, -14, -9]
[224,56, 28,15, -14, -8]
[272,56, 20,19, -6, -7]
}
alternative_sprites(foster_express_set, ZOOM_LEVEL_NORMAL, BIT_DEPTH_32BPP, "opengfx_generic_trams1.png") {
[ 48,56, 8,18, -3,-10]
[ 64,56, 20,19, -14, -5]
[ 96,56, 28,15, -14, -8]
[144,56, 20,19, -6, -7]
[176,56, 8,18, -3,-10]
[192,56, 20,19, -14, -9]
[224,56, 28,15, -14, -8]
[272,56, 20,19, -6, -7]
}
