src/examples/enemy-patrols-on-platform.html

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  <head>
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      name="viewport"
      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"
    />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Enemy Patrols on Platform</title>
    <link rel="stylesheet" href="/css/examples.css?ver=1.0.0" />
    <script src="/js/examples.js?ver=1.1.1"></script>
    <script src="/lib/phaser.min.js?ver=3.52.0"></script>
    <script src="/lib/enable3d/enable3d.phaserExtension.0.25.4.min.js"></script>
  </head>

  <body>
    <script>
      const { enable3d, Scene3D, Canvas, ExtendedObject3D, THREE } = ENABLE3D

      class MainScene extends Scene3D {
        constructor() {
          super({ key: 'MainScene' })
        }

        init() {
          this.accessThirdDimension()
        }

        async create() {
          const { ground } = await this.third.warpSpeed()

          // These assets are from mixamo.com
          // The the Idle.fbx contains the skin and the idle animation.

          // this.third.physics.debug.enable()

          this.third.camera.position.set(10, 10, 20)
          this.third.camera.lookAt(0, 0, 0)

          this.robot = new ExtendedObject3D()
          const pos = { x: 3, y: 2, z: -7 }

          this.third.physics.debug.enable()

          const sensor = this.third.physics.add.box(
            {
              x: pos.x - 4,
              y: pos.y - 0.5,
              z: pos.z - 2,
              width: 0.5,
              height: 3,
              depth: 0.5,
              collisionFlags: 1, // set the flag to static
              mass: 0.001
            },
            { lambert: { color: 0xff00ff, transparent: true, opacity: 0.2 } }
          )
          sensor.castShadow = sensor.receiveShadow = false

          this.third.load.fbx('/assets/fbx/Idle.fbx').then(object => {
            // set the flag to ghost
            sensor.body.setCollisionFlags(4)

            this.robot.add(object)

            this.third.animationMixers.add(this.robot.animation.mixer)

            this.robot.animation.add('Idle', object.animations[0])
            this.robot.animation.play('Idle')

            this.robot.traverse(child => {
              if (child.isMesh) child.castShadow = child.receiveShadow = true
            })

            this.robot.scale.set(0.02, 0.02, 0.02)
            this.robot.position.set(pos.x, pos.y, pos.z)
            this.robot.rotation.set(0, -Math.PI / 2, 0)

            this.third.add.existing(this.robot)
            this.third.physics.add.existing(this.robot, {
              shape: 'box',
              ignoreScale: true,
              width: 1,
              depth: 1,
              offset: { y: -0.5 }
            })

            this.third.physics.add.constraints.lock(this.robot.body, sensor.body)

            this.third.physics.add.collider(sensor, ground, event => {
              // console.log(event)
              if (event === 'end') this.robot.body.setAngularVelocityY(5)
              else this.robot.body.setAngularVelocityY(0)
            })

            // load Walking animations
            this.third.load.fbx(`/assets/fbx/Walking.fbx`).then(object => {
              console.log('loaded')
              this.robot.animation.add('Walking', object.animations[0])
              this.robot.animation.play('Walking')
            })
          })
        }

        update() {
          if (this.robot && this.robot.body) {
            const speed = 4
            const rotation = this.robot.getWorldDirection(
              new THREE.Vector3()?.setFromEuler?.(this.robot.rotation) || this.robot.rotation.toVector3()
            )
            const theta = Math.atan2(rotation.x, rotation.z)

            const x = Math.sin(theta) * speed,
              y = this.robot.body.velocity.y,
              z = Math.cos(theta) * speed

            this.robot.body.setVelocity(x, y, z)
          }
        }
      }

      const config = {
        type: Phaser.WEBGL,
        transparent: true,
        scale: {
          mode: Phaser.Scale.FIT,
          autoCenter: Phaser.Scale.CENTER_BOTH,
          width: window.innerWidth * Math.max(1, window.devicePixelRatio / 2),
          height: window.innerHeight * Math.max(1, window.devicePixelRatio / 2)
        },
        scene: [MainScene],
        ...Canvas()
      }

      window.addEventListener('load', () => {
        enable3d(() => new Phaser.Game(config)).withPhysics('/lib/ammo/kripken')
      })
    </script>
  </body>
</html>