Transport Tycoon Forums

Hi,
We (a friend and I) are currently developing a NewGRF with some French locos and we are going to pack them in a NewGRF.
We use the NML language to generate the NewGRF and it works fine.
However, we would like to have it on 32bpp graphics (as we design the locos with blender) but we don't manage to see them in game.
Here is the code:

grf {
  // Some stuff
}

railtypetable {
  RAIL, ELRL, HSTR
}

template tmpl_z2_train() {
  // Dimensions of the graphics
}

template tmpl_z1_train() {
  // Dimensions of the graphics
}

template tmpl_z0_train() {
   // Dimensions of the graphics
}

template tmpl_8bpp_train() {
  // Dimensions of the graphics
}

template tmpl_single_train() {
  [1, 161, 53, 14, -25, -10] //xpos ypos xsize ysize xrel yrel
}

spriteset(nez_casse_sprite, "img/nez_casse_mask.png") { tmpl_8bpp_train() }
spriteset(nez_casse_purch, "img/nez_casse_mask.png") { tmpl_single_train() }

// 32-bpp support
alternative_sprites(nez_casse_sprite, ZOOM_LEVEL_Z0, "img/nez_casse.png") { tmpl_z0_train() }
alternative_sprites(nez_casse_sprite, ZOOM_LEVEL_Z1, "img/nez_casse.png") { tmpl_z1_train() }
alternative_sprites(nez_casse_sprite, ZOOM_LEVEL_Z2, "img/nez_casse.png") { tmpl_z2_train() }

item(FEAT_TRAINS, nez_casse1) {
  property {
    // Parameters of the loco
  }
  graphics {
    default: nez_casse_sprite;
    purchase: nez_casse_purch;
  }
}

The img/nez_casse.png is a full-red RGBA image (we don't have generated the images from blender yet) and the img/nez_casse_mask.png is a palette-bases image that contains a 8bpp loco in the Windows palette (this is actually the example loco from NML doc).

In game, with OpenTTD 1.1.0 32bpp-patched, the loco just appears as 8bpp, the alternative_sprites section seems ignored.

Does anybody have a clue to solve this?
Regards,
felixzero

32bpp graphics use TAR files rather than PNGs, im not sure how this affects it on a coding level, but i understand that if you try to use PNGs you will only get 8bpp graphics.

_________________

|UK Roads /w Signs|British Rail Openttd Set (BROS)|
|Road Types NewGRF Specification|Leanden's Screenshots|

But in this case, what would be the use of alternative_sprites ?

It splits the original png files in correctly numbered png files with proper encoding. NML places those files in a "sprites/" directory. Those png files should be in "sprites/<name_of_newgrf>/*.png" instead of "sprites/*.png".

Oh! Thank you! I just didn't realized that nmlc created this folder. Now it just works fine.
I hope I will be back with a nice train set then.