@vtx/cs-map/lib/_util/heightAndZoom.js

React components for Vortex

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.zoomToHeight = exports.heightToZoom = void 0;
var A = 40487.57;
var B = 0.00007096758;
var C = 91610.74;
var D = -40467.74;

// 根据camera高度近似计算当前层级
var heightToZoom = exports.heightToZoom = function heightToZoom(height) {
  return Math.round(D + (A - D) / (1 + Math.pow(height / C, B)));
};

// 根据当前层级近似计算camera高度
var zoomToHeight = exports.zoomToHeight = function zoomToHeight(zoom) {
  return Math.round(C * Math.pow((A - D) / (zoom - D) - 1, 1 / B));
};
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