Hit entities (#277)

* added readme pt-pt

* added url/querystring deps and fix chat pos/scale

url and querystring were missing in node_modules.
chat scale option wasn't implemented and chat input was on top instead of bottom.

* added bot version text field and guiScale for small screens

text field to choose bot version. gui scale changes on small screens (slider takes no effect then). Removed unused images.

* Update index.js

* bot can now hit entities

Co-authored-by: Romain Beaumont <romain.rom1@gmail.com>

lib/cursor.js

@@ -2,6 +2,14 @@
 
 const { Vec3 } = require('vec3')
 
+function getViewDirection (pitch, yaw) {
+  const csPitch = Math.cos(pitch)
+  const snPitch = Math.sin(pitch)
+  const csYaw = Math.cos(yaw)
+  const snYaw = Math.sin(yaw)
+  return new Vec3(-snYaw * csPitch, snPitch, -csYaw * csPitch)
+}
+
 class Cursor {
   constructor (viewer, renderer, bot) {
     // Init state
@@ -37,9 +45,36 @@ class Cursor {
     document.addEventListener('mouseup', (e) => {
       this.buttons[e.button] = false
     })
+
     document.addEventListener('mousedown', (e) => {
       if (document.pointerLockElement !== renderer.domElement) return
       this.buttons[e.button] = true
+
+      const entity = bot.nearestEntity((e) => {
+        if (e.position.distanceTo(bot.entity.position) <= (bot.player.gamemode === 1 ? 5 : 3)) {
+          const dir = getViewDirection(bot.entity.pitch, bot.entity.yaw)
+          const { width, height } = e
+          const { x: eX, y: eY, z: eZ } = e.position
+          const { x: bX, y: bY, z: bZ } = bot.entity.position
+          const box = new THREE.Box3(
+            new THREE.Vector3(eX - width / 2, eY, eZ - width / 2),
+            new THREE.Vector3(eX + width / 2, eY + height, eZ + width / 2)
+          )
+
+          const r = new THREE.Raycaster(
+            new THREE.Vector3(bX, bY + 1.52, bZ),
+            new THREE.Vector3(dir.x, dir.y, dir.z)
+          )
+          const int = r.ray.intersectBox(box, new THREE.Vector3(eX, eY, eZ))
+          return int !== null
+        }
+
+        return false
+      })
+
+      if (entity) {
+        bot.attack(entity)
+      }
     })
     this.lastPlaced = 4 // ticks since last placed
     bot.on('physicsTick', () => { if (this.lastPlaced < 4) this.lastPlaced++ })