ludic/docs/language/ecs/fn-world_count.md
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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-29 17:53:22 +03:00

1.2 KiB

id name category kind tokens sig tip order
fn-world_count world_count ecs builtin world_count world_count() -> int The total number of live model instances in the world. 50

world_count returns the total number of live model instances in the world, as an int — a quick census without walking the world yourself. It takes no arguments and counts every spawned instance regardless of which properties it carries, so it is handy for a mod or debug overlay that wants a running tally of everything alive using the reflection ABI rather than a query loop. To resolve names to numeric ids for the other reflection calls, see world_prop_id; to read a specific instance's fields by id, see world_get.

program Census {
  property Position { column: int = 0, row: int = 0 }
  model Enemy { Position }

  handler SpawnEnemies phase Start {
    spawn Enemy { Position { column: 3, row: 3 } }
    spawn Enemy { Position { column: 9, row: 3 } }
  }

  handler DrawWorld phase Render {
    Screen.clear(Color.MidnightBlue)
    let alive = world_count()
    Screen.draw_number(x: 8, y: 8, value: alive, color: Color.Gold, scale: 2)
    Screen.show()
  }
}