refactor: move world concepts into engine

game/actors/mobs/Bee.ts

@@ -1,15 +1,28 @@
-import { Terrain } from "../../Terrain"
-import type { Mesh } from "../../../engine/scene/Mesh"
-import type { Mob } from "../Mob"
-import type { Entity } from "../../../engine/scene/Actor"
+import { Terrain, type Terrain as Ground } from "../../../engine/world/Terrain"
+import { Mesh, type Mesh as Geometry } from "../../../engine/scene/Mesh"
+import type { Material } from "../../../engine/render/Material"
+import type { ActorDefinition } from "../../../engine/scene/Actor"
+import { Mob, type MobState } from "../Mob"
 import { ellipsoid, nextRand, ovoidZ, wanderHeading, wing } from "./mobkit"
 
-export const bee: Entity<Mob, Terrain> = {
-  name: "bee",
-  build,
-  update,
-  boundingRadius: 0.5,
-  bodyHeight: 0.5,
+export type Bee = ActorDefinition<MobState, Ground>
+
+export namespace Bee {
+  export function create(material: Material): Bee {
+    const mesh = Mesh.create()
+    build(mesh)
+    return {
+      prototype: {
+        groups: [{ mesh, material }],
+        radius: 0.6,
+        minY: -0.5,
+        maxY: 1,
+      },
+      update,
+      transform: Mob.transform,
+      collider: (state) => Mob.collider(state, 0.5, 0.5, false),
+    }
+  }
 }
 
 const LEASH = 6
@@ -20,7 +33,7 @@ const HOVER = 1.1
 const BOB_AMP = 0.18
 const BOB_FREQ = 3
 
-function build(mesh: Mesh): void {
+function build(mesh: Geometry): void {
   // Fore-aft ovoid body striped along its length, a dark head at the front, two
   // pale wings. UVs: bee texture is stripe bands (left), head-dark (mid), wing-pale
   // (right); the body maps v along z so the stripes band across it.
@@ -30,7 +43,7 @@ function build(mesh: Mesh): void {
   wing(mesh, -1, 0.83, 0.99, 0, 1)
 }
 
-function update(mob: Mob, dt: number, terrain: Terrain): void {
+function update(mob: MobState, dt: number, terrain: Ground): void {
   mob.phase += dt
   mob.timer -= dt
   if (mob.timer <= 0) {