逐步完成前后端服务器

frontend/node_modules/zrender/lib/graphic/shape/Arc.js

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+import { __extends } from "tslib";
+import Path from '../Path.js';
+var ArcShape = (function () {
+    function ArcShape() {
+        this.cx = 0;
+        this.cy = 0;
+        this.r = 0;
+        this.startAngle = 0;
+        this.endAngle = Math.PI * 2;
+        this.clockwise = true;
+    }
+    return ArcShape;
+}());
+export { ArcShape };
+var Arc = (function (_super) {
+    __extends(Arc, _super);
+    function Arc(opts) {
+        return _super.call(this, opts) || this;
+    }
+    Arc.prototype.getDefaultStyle = function () {
+        return {
+            stroke: '#000',
+            fill: null
+        };
+    };
+    Arc.prototype.getDefaultShape = function () {
+        return new ArcShape();
+    };
+    Arc.prototype.buildPath = function (ctx, shape) {
+        var x = shape.cx;
+        var y = shape.cy;
+        var r = Math.max(shape.r, 0);
+        var startAngle = shape.startAngle;
+        var endAngle = shape.endAngle;
+        var clockwise = shape.clockwise;
+        var unitX = Math.cos(startAngle);
+        var unitY = Math.sin(startAngle);
+        ctx.moveTo(unitX * r + x, unitY * r + y);
+        ctx.arc(x, y, r, startAngle, endAngle, !clockwise);
+    };
+    return Arc;
+}(Path));
+Arc.prototype.type = 'arc';
+export default Arc;