A server-side dependency mod that allows JSON mods and patching to control various spawn conditions; does nothing on its own!

AdditionalSpawnConstraints will look for an additionalSpawnConstraints object inside an entity's /attributes object. This can be included on new entity JSON files, or patched in via JSON.

An example for some properties is below, applied via a patch to drifter.json:

[
	{
		"side": "Server",
		"file": "game:entities/land/drifter.json",
		"op": "addmerge",
		"path": "/attributes/additionalSpawnConstraints",
		"value": {
			"changeTemporalStormSpawnMechanics": true,
			"canSpawnOn":[
				"game:sand-*",
				"game:gravel-*",
				"game:dirtygravel",
				"game:sludgygravel",
				"game:muddygravel",
				"game:soil-*",
				"game:forestfloor-*",
				"game:peat-*",
				"game:rock-*",
				"game:crackedrock-*",
				"game:regolith-*",
				"game:ore-gem-*",
				"game:ore-graded-*",
				"game:ore-ungraded-*"
			]
		}
	}
]

The properties that can be set within additionalSpawnConstraints are:

• "minRegionStability" : The minimum region stablity required when spawning the entity; does not take into account rifts nor rift proximity.

• "maxRegionStability" : The maximum region stablity required when spawning the entity; does not take into account rifts nor rift proximity.

• "canSpawnOn" : A list of block codes that are valid for spawning the entity on; supports globs and regex to handle variants.

• "cannotSpawnOn" : A list of block codes that are not valid for spawning the entity on; supports globs and regex to handle variants.

• "changeTemporalStormSpawnMechanics" : Determines if other properties can affect temporal storm spawning, where applicable; default is false if unspecified. Does not apply to "minRegionStability" or "maxRegionStability". Only affects entities that are spawned during storms.

• Properties related to health scaling on spawn.

• None, atm.

• Natural Spawns : Limits drifters to spawning on soil and other natural blocks, even during storms.

• Thanks to Thalius for testing help.