Items have more mass than the sum of their parts

[Bejofo]

Describe the bug

Some items in game seem to defy conservation of matter when disassembled or assembled

Steps To Reproduce

Steps to reproduce the behavior:

1. Disassemble a sand bag.
2. Note the decreased mass ( 24.41 kg-> 0.49 kg)

Expected behavior

Things to remain more or less similar in mass.

Versions and configuration

• OS: Windows
  • OS Version: 10.0 1903
• Game Version: 0.D-9376-gb17746f [64-bit]
• Graphics Version: Tiles
• Mods loaded: [ Dark Days Ahead [dda], Disable NPC Needs [no_npc_food], Mythical Martial Arts [MMA], EZ-Mode Medical [fast_healing], Hydroponics [hydroponics], Mutant NPCs [mutant_npcs], Vehicle Additions Pack [blazemod], Roadheader and other mining vehicles [Heavy miners], Folding Parts pack [deoxymod], Tanks and Other Vehicles [Tanks], Aftershock [aftershock], Craftable Gun Pack [craftgp], DeadLeaves' Fictional Guns [FIC_Weapons], Icecoon's Arsenal [ew_pack], Makeshift Items Mod [makeshift], Medieval and Historic Classes and Shields [Medieval_Stuff], More Survival Tools [More_Survival_Tools], Mundane Zombies [Mundane_Zombies], No Acid Zombies [No_Acid_Zombies], No Ants [No_Anthills], No Bees [No_Bees], No Monsters [Only_Wildlife], No Fungal Monsters [No_Fungi], No Big Zombies [No_Big_Zombies], No Explosive Zombies [No_Explosive_Zombies], No Spiders [No_Spiders], Whitelist [Whitelist], Classes and Scenarios Mod [more_classes_scenarios], Classic Roguelike Classes [RL_Classes], Fuji's Military Profession Pack [fuji_mpp], Manual Bionic Installation [manualbionicinstall], No Filthy Clothing [no_filthy_clothing], Prevent Zombie Revivication [no_reviving_zombies], Safe Autodoc [safeautodoc], Simplified Nutrition [novitamins], No Rail Stations [No_Rail_Stations] ]

Additional context

I wrote a script to try and find other such cases. I'am fairly certain it missed quite a few, and some of the numbers are off, but I think it's a start.

Item Weight	Calculated weight (g)	Actual weight (g)	Δ (g)	Percent diff
washing_machine	8093	31752	23659	292.34
sandbag	895	24415	23520	2627.93
amplifier_head	1323	11339	10016	757.07
hard_plate	24000	32640	8640	36.00
multi_cooker	2728	11339	8611	315.65
welder_crude	1002	7250	6248	623.55
blunderbuss	2741	8267	5526	201.61
steel_plate	8000	12880	4880	61.00
extinguisher	5509	9071	3562	64.66
voltmeter	468	3000	2532	541.03
fan	329	2857	2528	768.39
char_smoker	1005	2600	1595	158.71
coilgun	1817	3341	1524	83.87
oxygen_tank	900	2268	1368	152.00
sm_extinguisher	900	2267	1367	151.89
rifle_223	2741	4080	1339	48.85
camera_pro	978	2268	1290	131.90
leather_harness_dog	997	2145	1148	115.15
vac_sealer	1309	2449	1140	87.09

[snipercup]

Nice, I did a similar thing with the weight analyser in https://github.com/snipercup/CCDA-JS-data-browser except from a recipe perspective, looks like you are coming from a disassemble perspective. I did some balancing then, for example #34916. It all spawned from issue #33327.

Basically you want the item to conseve mass when constructing and deconstructing. You already indexed some items where the mass is not preserved in deconstructing. In issue #33327 there was talk of enforcing the conservation of mass trough c++ but I only invested in balancing the current items in preperation for that.