@modoki/engine / index / Zone2D

Variable: Zone2D

const Zone2D: Trait<{ color: number; shape: "box" | "circle" | "capsule"; }>

Zone2D — a 2D spatial zone area for GAME logic (trigger regions, spawn areas, kill zones), the 2D twin of Zone3D. Drawn as an editor-only wireframe (in the 2D scene view) so a human can position + size it with the standard transform gizmo. It is NOT rendered in the built game. Pure geometric containment — needs NO physics collider.

The area IS the entity's Transform: position = centre (x, y); rotation = rz; how the scale maps to the area depends on shape:

• 'circle' — radius = sx
• 'box' — full size = scale (half-extents sx/2, sy/2)
• 'capsule' — radius = sx, total height = sy (a vertical pill along local Y) An occupant (tagged ZoneOccupant) is tested in the zone's LOCAL frame, so a rotated box/capsule contains correctly. Pure scalar trait — presentation/kind only.