feats

src/game.js

@@ -135,8 +135,8 @@ export default function game({ el, onError, onSuccess }) {
   // 射击
   const shooting = () => {
     isShooting = true
-    const { left, width, top } = currentBullet.getBoundingClientRect()
-    currentBullet.position = new Two.Vector(left + width / 2, top + speed)
+    const { top } = currentBullet.getBoundingClientRect()
+    currentBullet.position = new Two.Vector(currentBullet.position.x, top + speed)
 
     const hitted = isHit(currentBullet)
     if (hitted === 'error') {
@@ -171,6 +171,9 @@ export default function game({ el, onError, onSuccess }) {
 
     const cage = cageList.filter((it) => {
       const rect1 = it.getBoundingClientRect();
+
+      // 如果当前子弹的中心点位于目标轿厢矩形范围内
+      // 则代表击中
       return x >= rect1.left && x <= rect1.right &&
           y >= rect1.top && y <= rect1.bottom;
     })[0]