逐步完成前后端服务器

frontend/node_modules/zrender/lib/graphic/helper/poly.js

@@ -0,0 +1,25 @@
+import smoothBezier from './smoothBezier.js';
+export function buildPath(ctx, shape, closePath) {
+    var smooth = shape.smooth;
+    var points = shape.points;
+    if (points && points.length >= 2) {
+        if (smooth) {
+            var controlPoints = smoothBezier(points, smooth, closePath, shape.smoothConstraint);
+            ctx.moveTo(points[0][0], points[0][1]);
+            var len = points.length;
+            for (var i = 0; i < (closePath ? len : len - 1); i++) {
+                var cp1 = controlPoints[i * 2];
+                var cp2 = controlPoints[i * 2 + 1];
+                var p = points[(i + 1) % len];
+                ctx.bezierCurveTo(cp1[0], cp1[1], cp2[0], cp2[1], p[0], p[1]);
+            }
+        }
+        else {
+            ctx.moveTo(points[0][0], points[0][1]);
+            for (var i = 1, l = points.length; i < l; i++) {
+                ctx.lineTo(points[i][0], points[i][1]);
+            }
+        }
+        closePath && ctx.closePath();
+    }
+}