gisviewer-vue3-arcgis
Version:
在应用中引入私服的包， 项目根目录下 新建文件 .npmrc 在 .npmrc 中对包源进行配置：
68 lines (67 loc) • 1.81 kB
JavaScript
import c from "@arcgis/core/geometry/Extent.js";
class u {
// private duration: number;
constructor(t) {
this.viewer = t.viewer, this.points = t.points;
}
/**
* 移动到可视角度
*
* @returns
* @memberof FlyToPoints
*/
flyToPoints() {
if (this.points.length == 0)
return;
const t = this.calculateExtent(this.points), n = t.center, i = Math.abs(t.xmax - t.xmin), o = Math.abs(t.ymax - t.ymin), a = 0.6, e = i * a, l = o * a, h = new c({
xmin: t.xmin - e,
ymin: t.ymin - l,
xmax: t.xmax + e,
ymax: t.ymax + l,
spatialReference: t.spatialReference
}), m = this.calculateZoomLevel(
h,
this.viewer.width,
this.viewer.height
);
this.viewer.goTo({
target: h,
zoom: m,
center: n
});
}
calculateZoomLevel(t, n, i) {
const o = Math.abs(t.xmax - t.xmin), a = Math.abs(t.ymax - t.ymin), e = Math.log2(360 * (n / o) / 256), l = Math.log2(180 * (i / a) / 256);
return Math.floor(Math.min(e, l));
}
calculateExtent(t) {
let n = Number.MAX_VALUE, i = Number.MAX_VALUE, o = Number.MIN_VALUE, a = Number.MIN_VALUE;
for (let e = 0; e < t.length; e++) {
const l = t[e];
n = Math.min(n, l.longitude), i = Math.min(i, l.latitude), o = Math.max(o, l.longitude), a = Math.max(a, l.latitude);
}
return new c({
xmin: n,
ymin: i,
xmax: o,
ymax: a,
spatialReference: {
wkid: 4326
// Assuming WGS84 spatial reference system
}
});
}
calculateCenterPoint(t) {
let n = 0, i = 0;
for (let e = 0; e < t.length; e++)
n += t[e].longitude, i += t[e].latitude;
const o = n / t.length, a = i / t.length;
return {
longitude: o,
latitude: a
};
}
}
export {
u as default
};