From ecbdbe0446d2b34d7c6db6fd0aefe83ecb11d810 Mon Sep 17 00:00:00 2001
From: jiaming <743192023@qq.com>
Date: Thu, 13 Dec 2018 18:48:12 +0800
Subject: [PATCH] optmization

---
 src/plugins/canvasExtend.js | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/plugins/canvasExtend.js b/src/plugins/canvasExtend.js
index 86be556..f5a93ce 100644
--- a/src/plugins/canvasExtend.js
+++ b/src/plugins/canvasExtend.js
@@ -41,16 +41,23 @@ export function drawPolyline (ctx, points, lineWidth = 2, lineColor = '#000', cl
 }
 
 export function drawSmoothlinePath (ctx, points, close = false, newPath = false, moveTo = false) {
-  if (!ctx || points.length < 3) return
-
   const canDrawPoints = filterNull(points)
 
+  if (!ctx || canDrawPoints.length < 2) return
+
   close && canDrawPoints.push(canDrawPoints[0])
 
-  const lastPointIndex = canDrawPoints.length - 1
-
   newPath && ctx.beginPath()
 
+  if (canDrawPoints.length === 2) {
+    ctx.moveTo(...canDrawPoints[0])
+    ctx.lineTo(...canDrawPoints[1])
+
+    return
+  }
+
+  const lastPointIndex = canDrawPoints.length - 1
+
   moveTo && ctx.moveTo(...canDrawPoints[0])
 
   canDrawPoints.forEach((t, i) =>