keyword
spawn
spawn Label { Prop { field: v }; … }
A spawn creates a new model instance and attaches the listed properties, each field starting from its default and then taking any overrides you give. The Label after spawn is just a readable name for the instance at that call site — it does not have to be a declared model — while the {Prop { … }; …} block is what actually determines which properties the instance carries. If you spawn a declared model, every property in that model comes along automatically. A newly spawned instance is visible to matching queries immediately, and one spawned mid-loop at a higher id is even visited in the same tick, so spawn into a later phase if you want to defer that.
Example
program Waves {
property Position { column: int = 0, row: int = 0 }
property Velocity { delta_x: int = 0, delta_y: int = 0 }
property Health { current: int = 100, maximum: int = 100 }
model Enemy { Position, Velocity, Health }
handler SpawnWave phase Start {
spawn Grunt { Position { column: 18, row: 4 }; Velocity { delta_x: -1 }; Health { current: 20 } }
spawn Brute { Position { column: 18, row: 9 }; Velocity { delta_x: -1 }; Health { current: 60 } }
}
}