From 23bdc3e89937ac74466ef4e63c77dd845305e1fb Mon Sep 17 00:00:00 2001
From: liqikun <liqikun@3dnest.cn>
Date: Tue, 28 May 2024 11:06:02 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E7=BB=98=E5=88=B6=E5=A4=9A=E8=BE=B9?=
=?UTF-8?q?=E5=BD=A2=E7=BB=88=E7=82=B9=E5=90=B8=E9=99=84=E6=95=88=E6=9E=9C?=
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---
src/polygon/polygon.ts | 41 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/src/polygon/polygon.ts b/src/polygon/polygon.ts
index 2726caa..d069ec0 100644
--- a/src/polygon/polygon.ts
+++ b/src/polygon/polygon.ts
@@ -22,17 +22,54 @@ export default class Polygon extends Base {
* Add points only on click events
*/
addPoint(cartesian: Cartesian3) {
- this.points.push(cartesian);
+ let endPoint = cartesian;
+ if (this.points.length > 2) {
+ endPoint = this.getEndPoint(cartesian);
+ }
+ this.points.push(endPoint);
if (this.points.length === 1) {
this.onMouseMove();
}
+ if (this.points.length > 2 && this.comparePositions(this.points[0], endPoint)) {
+ this.finishDrawing();
+ }
+ }
+
+ /**
+ * Compare whether the positions of two points are equal.
+ */
+ comparePositions(point1: Cartesian3, point2: Cartesian3) {
+ const lnglat1 = this.cartesianToLnglat(point1);
+ const lnglat2 = this.cartesianToLnglat(point2);
+ return lnglat1[0] === lnglat2[0] && lnglat1[1] === lnglat2[1];
+ }
+
+ /**
+ * Calculate the distance between two points
+ */
+ calculateDistance(point1: Cartesian3, point2: Cartesian3) {
+ return this.cesium.Cartesian3.distance(point1, point2);
+ }
+
+ /**
+ * get end point
+ */
+ getEndPoint(cartesian: Cartesian3) {
+ let endPoint = cartesian;
+ let distance = this.calculateDistance(this.points[0], cartesian);
+ if (distance < 100) endPoint = this.points[0];
+ return endPoint;
}
/**
* Draw a shape based on mouse movement points during the initial drawing.
*/
updateMovingPoint(cartesian: Cartesian3) {
- const tempPoints = [...this.points, cartesian];
+ let endPoint = cartesian;
+ if (this.points.length > 2) {
+ endPoint = this.getEndPoint(cartesian);
+ }
+ const tempPoints = [...this.points, endPoint];
this.setGeometryPoints(tempPoints);
if (tempPoints.length === 2) {
this.addTempLine();