Help learning NML

[oberhümer]

The coordinates of the top left point of the first sprite in the set, which is also on the (top) left.

And there is no direct way to set the tractive effort, if you want a specific value x you need to set the coefficient to x / (10 * (weight of the vehicle in tons) * 255), keep in mind that the maximum is ten times the vehicle weight (i.e. (coefficient) = 255 1).

[NekoMaster]

Well I tried setting tractive_effort_coefficient to 1 and I got like... 2010 kN TE when the vehicle weight was 121 Tons (I think thats what a EMD E9 Weighs)

EDIT : I set the coordinates to 0, 0 and nothing happened, its still the Jubilie sprite in the game.

[oberhümer]

Whoops, sorry, I was thinking of NFO. In NML, you leave out the multiplication by 255, so 1 is actually the maximum value.

And if you want to use your own sprites, you need to set "sprite_id" to SPRITE_ID_NEW_TRAIN.

[NekoMaster]

Well how do i get a lower value then 1 if 1 is the max? I tried a negative and a decimal but nothing works.... im sure the EMD e9 didn't have 1205 kn TE

[oberhümer]

Use decimals, and show me how exactly your code looks at the moment.

[NekoMaster]

Well I figured out how to do the decimals, it needs a 0.## not a .##

Though I still have that sprite problem

Code: Select all

grf {
   grfid : "NML1";
   name:      string(STR_GRF_NAME);
   desc:      string(STR_GRF_DESCRIPTION);
   version:   1;
   min_compatible_version:   5;
}

template template_train(x, y) {
   //[left_x,   upper_y,    width,    height,    offset_x,    offset_y]
   [x,        y,        10,      28,         -4,         -11]
   [x+ 20,    y,          26,      28,        -17,       -14]
   [x+ 50,    y,          36,      28,        -18,       -20]
   [x+ 90,    y,          26,      28,         -9,       -15]
   [x+120,    y,        10,      28,         -4,         -11]
   [x+140,    y,          26,      28,        -16,       -16]
   [x+170,    y,          36,      28,        -18,       -20]
   [x+210,    y,          26,      28,         -8,       -16]
}

spriteset(spriteset_train_graphics, "gfx/train.png") {
   template_train(0, 0)
}

spritegroup spritegroup_train_graphics {
   //graphics for loaded and not loaded are the same
   loading: spriteset_train_graphics;
   loaded: spriteset_train_graphics;
}

item (FEAT_TRAINS, rail_engine) {
   property {
      sprite_id:                  01;
      name:                     string(STR_NAME_TRAIN);
      climates_available:          ALL_CLIMATES;
      introduction_date:            date(1954,1,1);
      model_life:                  20;
      retire_early:               0;
      vehicle_life:               30;
      cost_factor:               226;
      running_cost_factor:         242;
      speed:                     177 km/h;
      power:                      2400 hp;
      weight:                   121 ton;
      cargo_capacity:             0;
      tractive_effort_coefficient:    0.01;
   }
   
   graphics {
      spritegroup_train_graphics;
   }
}

[oberhümer]

[... 1 is actually the maximum value.]

And if you want to use your own sprites, you need to set "sprite_id" to SPRITE_ID_NEW_TRAIN.

You may also find that 0.01 is a bit low, the default is 0.3.

[FooBar]

As for the sprite problem, you need to tweak the left_x, width and height values. They are still from what I use in the Dutch Tram Set, but your sprite sheet is different. Width and height are the width and height of each sprite. The x+... values indicate the difference between the top left corner of the first sprite and the top left corner of the sprite you're at, so that will be x+16, x+48, x+96 etc.

When that's done you can use the ingame sprite aligner to figure out the offset_x and offset_y values. Ctrl+B also helps here to get the sprite in the middle of the bounding box. A good starting point is taking the negative of half the sprite width resp. height for offset_x resp offset_y.