Add random yelling

Engine/src/live/AnimalEntity.ts

@@ -1,5 +1,6 @@
 import * as planck from 'planck'
 import { AnimalDefinition, CreatureDefinition } from '../data/animals'
+import { playSong, playSound } from '../shared/audio'
 import { Action, adjustAction } from "./Action"
 import { Entity, Sensor } from "./Entity"
 import { PuddleEntity } from './PuddleEntity'
@@ -18,6 +19,9 @@ export class AnimalEntity extends Entity {
   def: AnimalDefinition
   mode: CreatureDefinition
   desiredActions: Action[] = []
+  stepSoundElapsed: number = 0
+  lastYellElapsed: number = 0
+  nextYell: number = 1000
 
   constructor(def: AnimalDefinition) {
     super(`${def.name}.animal.stand.west.0`)
@@ -40,6 +44,7 @@ export class AnimalEntity extends Entity {
   }
   update(delta: number, ctx: WorldContext) {
     super.update(delta)
+    this.lastYellElapsed += delta
 
     let waterZones = this.zones.filter(v=>v.type==='fluid')
     if (waterZones.length) {
@@ -98,6 +103,9 @@ export class AnimalEntity extends Entity {
           }
           shouldMove = true
           break
+        case 'attack':
+          this.yell(1)
+          break
       }
       if (this.direction > 360) {
         this.direction = 0
@@ -107,6 +115,7 @@ export class AnimalEntity extends Entity {
     }
 
     if (shouldMove) {
+      this.stepSoundElapsed += delta
       let r = this.direction * (Math.PI/180)
       if (Math.abs(this.velocity[0]) < this.mode.maxSpeed) {
         this.velocity[0] -= Math.cos(r) * this.mode.acceleration
@@ -119,6 +128,11 @@ export class AnimalEntity extends Entity {
       if (this.sprite.subsetKey !== cardinal || this.sprite.subsetKey !== 'run') {
         this.sprite.setCtor(`${this.sprite.spriteKey}.${this.sprite.animationKey}.${this.sprite.setKey}.${cardinal}.${this.sprite.frameIndex}`)
       }
+      if (this.stepSoundElapsed >= 200) {
+        let v = 1+Math.round(Math.random()*3)
+        playSound('action/footstep-tiny-v'+v, 0.5)
+        this.stepSoundElapsed = 0
+      }
       this.sprite.animate = true
     } else {
       this.sprite.animate = false
@@ -162,6 +176,7 @@ export class AnimalEntity extends Entity {
           }
           this.desiredActions = adjustAction([], this.getCardinal(a), 0.85)
           this.desiredActions = adjustAction(this.desiredActions, this.getCardinal(Math.random()*360), Math.random())
+          this.yell(1)
         } else if (this.smelledTarget) {
           let r = Math.atan2(this.y-this.smelledTarget.y, this.x-this.smelledTarget.x)
           let a = r * (180 / Math.PI)
@@ -185,6 +200,9 @@ export class AnimalEntity extends Entity {
             } else {
               this.desiredActions = adjustAction([], this.getCardinal(Math.random()*360), 1)
             }
+            if (Math.random() > 1 - this.mode.noisiness) {
+              this.yell(0.25)
+            }
             this.wanderTimer = 0
           }
         }
@@ -229,6 +247,18 @@ export class AnimalEntity extends Entity {
       this.seenTarget = undefined
     }
   }
+  yell(volume: number) {
+    if (this.lastYellElapsed > this.nextYell) {
+      this.nextYell = 500 + Math.random()*3000
+      this.lastYellElapsed = 0
+      let v = 1+Math.round(Math.random()*2)
+      if (this.isMonster) {
+        playSound(`monsters/evil-${this.def.name}-v${v}`, volume)
+      } else {
+        playSound(`animals/${this.def.name}-v${v}`, volume)
+      }
+    }
+  }
 }
 
 export function isAnimalEntity(o: any): o is AnimalEntity {