Add/use spawn zones; reduce physics step

Engine/src/states/Game.ts

@@ -101,6 +101,7 @@ export function GameState(ctx: ContextI): StateI {
   let layers: Layer[] = []
   let entities: Entity[] = []
   let zones: Zone[] = []
+  let spawnZones: Record<string, Zone[]> = {}
 
   let enter = () => {
     lastTime = performance.now()
@@ -174,18 +175,33 @@ export function GameState(ctx: ContextI): StateI {
       addZone(new Zone(z))
     }
 
-    // Add player entity
-    player = new AnimalEntity(animals.deer)
-    player.isPlayer = true
-    addEntity(player, 'objects', 300, 100)
+    let playerSpawn = getSpawnZone('spawn')
+    if (!playerSpawn) {
+      // return to menu with an error?
+    } else {
+      let bounds = playerSpawn.bounds
+      let x = bounds[0] + Math.floor(Math.random() * bounds[2])
+      let y = bounds[1] + Math.floor(Math.random() * bounds[3])
+      // Add player entity
+      player = new AnimalEntity(animals.deer)
+      player.isPlayer = true
+      addEntity(player, 'objects', x, y)
+    }
 
     // Add fake others
-    addEntity(new AnimalEntity(animals.turkey), 'objects', 200, 200)
-    addEntity(new AnimalEntity(animals.nutria), 'objects', Math.random()*w.width, Math.random()*w.height)
-    addEntity(new AnimalEntity(animals.deer), 'objects', Math.random()*w.width, Math.random()*w.height)
-    addEntity(new AnimalEntity(animals.salamander), 'objects', Math.random()*w.width, Math.random()*w.height)
-    addEntity(new AnimalEntity(animals.rabbit), 'objects', Math.random()*w.width, Math.random()*w.height)
+    // MOVE ME
+    for (let animal of ['turkey','nutria','deer','salamander','rabbit']) {
+      let count = 2 + Math.floor(Math.random() * 8)
+      for (let i = 0; i < count; i++) {
+        let spawn = getSpawnZone(animal)
+        if (!spawn) break
+        let bounds = spawn.bounds
+        let x = bounds[0] + Math.floor(Math.random() * bounds[2])
+        let y = bounds[1] + Math.floor(Math.random() * bounds[3])
 
+        addEntity(new AnimalEntity(animals[animal]), 'objects', x, y)
+      }
+    }
     ctx.app.stage.addChild(rootContainer)
   }
   let leave = () => {
@@ -211,9 +227,9 @@ export function GameState(ctx: ContextI): StateI {
       nightfall(true)
     }
     // Run world sim.
-    while (elapsed >= 1/60) {
-      world.step(1/60)
-      elapsed -= 1/60
+    while (elapsed >= 1/5) {
+      world.step(1/5)
+      elapsed -= 1/5
     }
     // Update/render.
     for (let layer of layers) {
@@ -243,9 +259,7 @@ export function GameState(ctx: ContextI): StateI {
   }
 
   let addEntity = (entity: Entity, layerTitle: string, x: number, y: number) => {
-    console.log('add called with', x, y)
     if (entities.find(v=>v===entity)) return
-    console.log('add somethin', entity)
     entities.push(entity)
     let layer = layers.find(v=>v.title===layerTitle)
     if (!layer) layer = playLayer
@@ -280,23 +294,26 @@ export function GameState(ctx: ContextI): StateI {
           defaultLong = entity.def.animal.scent
           defaultShort = entity.def.animal.sight
         }
-        // Create a short sensor (vision).
-        let senseFixture = body.createFixture({
-          shape: planck.Circle(planck.Vec2(entity.x, entity.y), defaultShort),
-          isSensor: true,
-        })
-        senseFixture.setUserData(new Sensor(entity, senseFixture, 'short'))
-        // Create a long sensor (scent).
-        let longSenseFixture = body.createFixture({
-          shape: planck.Circle(planck.Vec2(entity.x, entity.y), defaultLong),
-          isSensor: true,
-        })
-        longSenseFixture.setUserData(new Sensor(entity, longSenseFixture, 'long'))
+        if (entity instanceof AnimalEntity && !entity.isPlayer) {
+          // Create a short sensor (vision).
+          let senseFixture = body.createFixture({
+            shape: planck.Circle(planck.Vec2(entity.x, entity.y), defaultShort),
+            isSensor: true,
+            filterGroupIndex: -8
+          })
+          senseFixture.setUserData(new Sensor(entity, senseFixture, 'short'))
+          // Create a long sensor (scent).
+          let longSenseFixture = body.createFixture({
+            shape: planck.Circle(planck.Vec2(entity.x, entity.y), defaultLong),
+            isSensor: true,
+            filterGroupIndex: -8
+          })
+          longSenseFixture.setUserData(new Sensor(entity, longSenseFixture, 'long'))
+        }
       }
     }
     entity.x = x
     entity.y = y
-    console.log('set entity xy', entity.x, entity.y)
   }
   let removeEntity = (entity: Entity) => {
     entities = entities.filter(v=>v!==entity)
@@ -310,14 +327,23 @@ export function GameState(ctx: ContextI): StateI {
   // Zonage
   let addZone = (zone: Zone) => {
     if (zones.find(v=>v===zone)) return
-    let shape = planck.Polygon(zone.points.map(v=>planck.Vec2(v[0],v[1])))
-    zone.fixture = worldBody.createFixture({
-      shape: shape,
-    })
-    if (zone.type === 'fluid') {
-      zone.fixture.setSensor(true)
+    // We're using triggers for spawning due to laziness.
+    if (zone.type === 'trigger') {
+      if (!spawnZones[zone.event]) {
+        spawnZones[zone.event] = []
+      }
+      spawnZones[zone.event].push(zone)
+    } else {
+      let shape = planck.Polygon(zone.points.map(v=>planck.Vec2(v[0],v[1])))
+      zone.fixture = worldBody.createFixture({
+        shape: shape,
+      })
+      if (zone.type === 'fluid') {
+        zone.fixture.setSensor(true)
+      }
+      zone.fixture.setUserData(zone)
     }
-    zone.fixture.setUserData(zone)
+    zones.push(zone)
   }
   let removeZone = (zone: Zone) => {
     zones = zones.filter(v=>v!==zone)
@@ -325,6 +351,12 @@ export function GameState(ctx: ContextI): StateI {
       worldBody.destroyFixture(zone.fixture)
     }
   }
+  let getSpawnZone = (name: string): Zone|undefined => {
+    if (!spawnZones[name] || !spawnZones[name].length) {
+      return undefined
+    }
+    return spawnZones[name][Math.floor(Math.random()*spawnZones[name].length)]
+  }
 
   let worldContext: WorldContext = {
     addEntity,