Add basic zone implementation

Engine/src/states/Game.ts

@@ -6,12 +6,23 @@ import * as planck from 'planck'
 import { DecorationInstance } from "../shared/decors"
 import { SpriteInstance, sprites } from "../shared/sprites"
 import { ShapeCircle, ShapePoints } from "../data/sprite"
+import { SegmentZone } from "../data/segment"
 
 interface Action {
   type: string
   priority: number
 }
 
+class Zone {
+  fixture: planck.Fixture|undefined
+  type: 'solid'|'fluid'
+  points: [number, number][]
+  constructor(z: SegmentZone) {
+    this.type = z.type
+    this.points = z.points.map(v=>[v[0], v[1]])
+  }
+}
+
 class Entity {
   sprite: SpriteInstance
   body?: planck.Body
@@ -197,10 +208,14 @@ export function GameState(ctx: ContextI): StateI {
   let world: planck.World = planck.World({
     gravity: planck.Vec2(0, 0),
   })
+  let worldBody: planck.Body = world.createBody({
+    type: 'static',
+  })
 
   let rootContainer = new PIXI.Container()
   let decorations: DecorationInstance[] = []
   let entities: Entity[] = []
+  let zones: Zone[] = []
 
   let enter = () => {
     hookKeyboard()
@@ -247,6 +262,10 @@ export function GameState(ctx: ContextI): StateI {
       rootContainer.addChild(container)
     }
 
+    for (let z of w.zones) {
+      addZone(new Zone(z))
+    }
+
     // Add bogus entity
     //addEntity(new PlayerEntity('animals.deer.animal.west.0'), 0, 0)
     addEntity(new PlayerEntity('bogus-arrows.player.normal.w.0'), 0, 0)
@@ -326,6 +345,24 @@ export function GameState(ctx: ContextI): StateI {
     }
   }
 
+  // Zonage
+  let addZone = (zone: Zone) => {
+    if (zones.find(v=>v===zone)) return
+    let shape = planck.Chain(zone.points.map(v=>planck.Vec2(v[0],v[1])))
+    zone.fixture = worldBody.createFixture({
+      shape: shape,
+    })
+    if (zone.type === 'fluid') {
+      zone.fixture.setSensor(true)
+    }
+  }
+  let removeZone = (zone: Zone) => {
+    zones = zones.filter(v=>v!==zone)
+    if (zone.fixture) {
+      worldBody.destroyFixture(zone.fixture)
+    }
+  }
+
   let desiredActions: Action[] = []
   let adjustAction = (type: string, v: number) => {
     let action = desiredActions.find(v=>v.type===type)