How to program a new item into the game?

Game Talk The Drawing Board
1

I’m trying to make a Steam machine that’ll gentrate power for your car’s battery by burning wood and using up water.

Right now, I’m stuck on one part…Finding the ID list. I need to go to the Minireactor’s ID and a engine’s ID to chop them up and build a proper steampunk machine ID that’ll make power from logs and draw from your supply of clean water like gas.

The power it makes is 1/3 of the power the truck alternator makes due to the energy density of wood compared to gas. I still need to polish that bit a little, do some more math based on the weight of each logs in the game. How much do one unit of gas weights?

I might also need to take a look at the location list to be sure that I don’t have to add logs to that list or something. Make it so one unit of log burns for x time, etc.

(Old, see edit at end of this post)
“type” : “vehicle_part”,
“id” : “minireactor”,
“name” : “Steam Furnace Rig”,
“symbol” : “F”,
“color” : “light_green”,
“broken_symbol” : “#”,
“broken_color” : “red”,
“damage_modifier” : 80,
“durability” : 580,
“size” : 10000,
“epower” : 746,
“fuel_type” : “log”,
“item” : “minireactor”,
“difficulty” : 5,
“location” : “fuel_source”,
“flags” : [“FUEL_TANK”],
“breaks_into” : [
{“item”: “steel_lump”, “min”: 6, “max”: 11},
{“item”: “steel_chunk”, “min”: 6, “max”: 11},
{“item”: “scrap”, “min”: 6, “max”: 11}

Once that wall’s overcame, I’ll edit this thing a bit more, spit and polish then throw it back here for feedbacks.

Edit: My process so far.

[spoiler]
In the main data folder, Vehicle_Parts.Json, I added this.

{
“type” : “vehicle_part”,
“id” : “steampunkrig”,
“name” : “Steam Furnace Rig”,
“symbol” : “F”,
“color” : “light_green”,
“broken_symbol” : “#”,
“broken_color” : “red”,
“damage_modifier” : 80,
“durability” : 580,
“size” : 10000,
“epower” : 746,
“fuel_type” : “log”,
“item” : “steampunkrig”,
“difficulty” : 5,
“location” : “fuel_source”,
“flags” : [“FUEL_TANK”],
“breaks_into” : [
{“item”: “steel_lump”, “min”: 12, “max”: 30},
{“item”: “steel_chunk”, “min”: 12, “max”: 30},
{“item”: “scrap”, “min”: 12, “max”: 30}
},

And in the data/item/Vehicle_parts.json, I added this.

{
“type”:“GENERIC”,
“id” : “steampunkrig”,
“name” : “Steam Furnace Rig”,
“description” : “A Steam Furnace that boils water into steam to turn fans to generate power. Uses clean water and logs.”,
“weight” : 58215,
“to_hit” : -4,
“color” : “light_green”,
“symbol” : “f”,
“material” : [“steel”],
“volume” : 6,
“bashing” : 7,
“cutting” : 0,
“category” : “veh_parts”,
“price” : 40000
},

And in Data/Recipes/Recipe_electronics, I added this.

{
“type” : “recipe”,
“result”: “steampunkrig”, (This is right? Put the ID of the item here?)
“category”: “CC_ELECTRONIC”,
“subcategory”: “CSC_ELECTRONIC_PARTS”,
“skill_used”: “mechanics”,
“skills_required”: [“electronics”,7],
“difficulty”: 4,
“time”: 60000, Need to edit this to ten hours. What’s the units here?
“reversible”: false,
“decomp_learn”: 4,
“autolearn”: false,
“book_learn”: [[“textbook_mechanics”, 6] , [“textbook_electronics”, 8] , [“textbook_fabrication”, 8] , [“welding_book”, 5]],
“qualities”:[
{“id”:“HAMMER”,“level”:2,“amount”:1},
{“id”:“SAW_M”,“level”:1,“amount”:1},
{“id”:“WRENCH”,“level”:1,“amount”:1}
], “tools”: [
[
[ “goggles_welding”, -1 ]
],
[
[ “welder”, 100 ],
[ “welder_crude”, 150 ],
[ “toolset”, 150 ]
]
],
“components”: [
[
[ “frame”, 1 ]
],
[
[“soldering_iron”, 1]
],
[
[“steel_lump”, 12],
[ “steel_chunk”, 50 ],
[ “scrap”, 150 ]
[ “copper_wire”, 300]
],
[
[“cable”, 5]
]
]
},

I still can’t find the .json that controls how much fuel engines draws on, etc. I need help! Seems that I’m more than halfway finished here.[/spoiler]

2

Fairly sure that you can just type “habfhubfkhuabkfb” into the ID list and it’ll work because IDs define the item itself, nothing else.

3

“id” can be anything you want (preferably all lowercase and with underscores instead of spaces).

As I understand it the “item” field is the “id” value of the item that you “install” to make the defined vehicle part (which has it’s own definition in the items folder).

4

Oh yeah, don’t forget that. I learned that the hard way…

5

[quote=“i2amroy, post:3, topic:8156”]“id” can be anything you want (preferably all lowercase and with underscores instead of spaces).

As I understand it the “item” field is the “id” value of the item that you “install” to make the defined vehicle part (which has it’s own definition in the items folder).[/quote]

Ooh, here we go. Thanks!

I’ll be wanting to ask how to turn this into a add-on, a mod for the game after I make the new “item”.

6

Okay.

In the main data folder, Vehicle_Parts.Json, I added this.

{
“type” : “vehicle_part”,
“id” : “steampunkrig”,
“name” : “Steam Furnace Rig”,
“symbol” : “F”,
“color” : “light_green”,
“broken_symbol” : “#”,
“broken_color” : “red”,
“damage_modifier” : 80,
“durability” : 580,
“size” : 10000,
“epower” : 746,
“fuel_type” : “log”,
“item” : “steampunkrig”,
“difficulty” : 5,
“location” : “fuel_source”,
“flags” : [“FUEL_TANK”],
“breaks_into” : [
{“item”: “steel_lump”, “min”: 12, “max”: 30},
{“item”: “steel_chunk”, “min”: 12, “max”: 30},
{“item”: “scrap”, “min”: 12, “max”: 30}
},

And in the data/item/Vehicle_parts.json, I added this.

{
“type”:“GENERIC”,
“id” : “steampunkrig”,
“name” : “Steam Furnace Rig”,
“description” : “A Steam Furnace that boils water into steam to turn fans to generate power. Uses clean water and logs.”,
“weight” : 58215,
“to_hit” : -4,
“color” : “light_green”,
“symbol” : “f”,
“material” : [“steel”],
“volume” : 6,
“bashing” : 7,
“cutting” : 0,
“category” : “veh_parts”,
“price” : 40000
},

And in Data/Recipes/Recipe_electronics, I added this.

{
“type” : “recipe”,
“result”: “steampunkrig”, (This is right? Put the ID of the item here?)
“category”: “CC_ELECTRONIC”,
“subcategory”: “CSC_ELECTRONIC_PARTS”,
“skill_used”: “mechanics”,
“skills_required”: [“electronics”,7],
“difficulty”: 4,
“time”: 60000, Need to edit this to ten hours. What’s the units here?
“reversible”: false,
“decomp_learn”: 4,
“autolearn”: false,
“book_learn”: [[“textbook_mechanics”, 6] , [“textbook_electronics”, 8] , [“textbook_fabrication”, 8] , [“welding_book”, 5]],
“qualities”:[
{“id”:“HAMMER”,“level”:2,“amount”:1},
{“id”:“SAW_M”,“level”:1,“amount”:1},
{“id”:“WRENCH”,“level”:1,“amount”:1}
], “tools”: [
[
[ “goggles_welding”, -1 ]
],
[
[ “welder”, 100 ],
[ “welder_crude”, 150 ],
[ “toolset”, 150 ]
]
],
“components”: [
[
[ “frame”, 1 ]
],
[
[“soldering_iron”, 1]
],
[
[“steel_lump”, 12],
[ “steel_chunk”, 50 ],
[ “scrap”, 150 ]
[ “copper_wire”, 300]
],
[
[“cable”, 5]
]
]
},

I still can’t find the .json that controls how much fuel engines draws on, etc. I need help! Seems that I’m more than halfway finished here.

7

It’s a bit more complicated.

You need to mess with src/vehicle.cpp.

Fuel consumption multipliers are hardcoded at the moment, you can’t edit them from json level.

But this is a bit more complex than that, because your engine should also consume water. It might be as easy as adding appropriate "if"s in consume_fuel and fuel_left functions (if fuel_type == wood) or it may require a bit more.