逐步完成前后端服务器

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

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+import { __extends } from "tslib";
+import Path from '../Path.js';
+var EllipseShape = (function () {
+    function EllipseShape() {
+        this.cx = 0;
+        this.cy = 0;
+        this.rx = 0;
+        this.ry = 0;
+    }
+    return EllipseShape;
+}());
+export { EllipseShape };
+var Ellipse = (function (_super) {
+    __extends(Ellipse, _super);
+    function Ellipse(opts) {
+        return _super.call(this, opts) || this;
+    }
+    Ellipse.prototype.getDefaultShape = function () {
+        return new EllipseShape();
+    };
+    Ellipse.prototype.buildPath = function (ctx, shape) {
+        var k = 0.5522848;
+        var x = shape.cx;
+        var y = shape.cy;
+        var a = shape.rx;
+        var b = shape.ry;
+        var ox = a * k;
+        var oy = b * k;
+        ctx.moveTo(x - a, y);
+        ctx.bezierCurveTo(x - a, y - oy, x - ox, y - b, x, y - b);
+        ctx.bezierCurveTo(x + ox, y - b, x + a, y - oy, x + a, y);
+        ctx.bezierCurveTo(x + a, y + oy, x + ox, y + b, x, y + b);
+        ctx.bezierCurveTo(x - ox, y + b, x - a, y + oy, x - a, y);
+        ctx.closePath();
+    };
+    return Ellipse;
+}(Path));
+Ellipse.prototype.type = 'ellipse';
+export default Ellipse;