大量指数接近动画改为基于时间而不是帧

parts/scenes/app_dtw.lua

@@ -280,13 +280,13 @@ function scene.touchDown(x)
     end
 end
 
-function scene.update()
+function scene.update(dt)
     if state==1 then
         local t=TIME()
         time=t-startTime
         local v=0
         for i=2,20 do v=v+i*(i-1)*.3/(t-keyTime[i])end
-        speed=speed*.99+v*.01
+        speed=MATH.expApproach(speed,v,dt)
         if speed>maxSpeed then maxSpeed=speed end
 
         if arcade then