add tower builing game

public/tower_game-master/src/tutorial.js

@@ -0,0 +1,35 @@
+import { getHookStatus } from './utils'
+import * as constant from './constant'
+
+export const tutorialAction = (instance, engine, time) => {
+  const { width, height } = engine
+  const { name } = instance
+  if (!instance.ready) {
+    instance.ready = true
+    const tutorialWidth = width * 0.2
+    instance.updateWidth(tutorialWidth)
+    instance.height = tutorialWidth * 0.46
+    instance.x = engine.calWidth - instance.calWidth
+    instance.y = height * 0.45
+    if (name !== 'tutorial') {
+      instance.y += instance.height * 1.2
+    }
+  }
+  if (name !== 'tutorial') {
+    instance.y += Math.cos(time / 200) * instance.height * 0.01
+  }
+}
+
+export const tutorialPainter = (instance, engine) => {
+  if (engine.checkTimeMovement(constant.tutorialMovement)) {
+    return
+  }
+  if (getHookStatus(engine) !== constant.hookNormal) {
+    return
+  }
+  const { ctx } = engine
+  const { name } = instance
+  const t = engine.getImg(name)
+  ctx.drawImage(t, instance.x, instance.y, instance.width, instance.height)
+}
+