@arcgis/core
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ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API
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JavaScript
/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.33/esri/copyright.txt for details.
*/
import{tBaseLine as o,tAscensionZoomOnly as e,tAscensionZoomPan as n,tPanion as a,tDescensionZoomOnly as t,tDescensionZoomPan as s,dtAscensionZoomOnly as c,dtAscensionZoomPan as i,dtPanion as r,dtDescensionZoomOnly as m,dtDescensionZoomPan as u,ddtAscensionZoomOnly as l,ddtAscensionZoomPan as d,ddtPanion as p,ddtDescensionZoomOnly as x,ddtDescensionZoomPan as F}from"./functions.js";function f(f,Z){let b=D(f,Z);const h={ascensionFactor:null!=Z.ascensionFactor?Z.ascensionFactor:.5,descensionFactor:null!=Z.descensionFactor?Z.descensionFactor:.5},M=0===h.ascensionFactor,N=0===h.descensionFactor,P=M?e:n,g=M?c:i,k=M?l:d,j=N?t:s,w=N?m:u,z=N?x:F,A=o=>P(f,o,h)+a(f,o,h)+j(f,o,h),I=o=>g(f,o,h)+r(f,o,h)+w(f,o,h),S=o=>k(f,o,h)+p(f,o,h)+z(f,o,h);let q=A(b);const v=o(f);let y;const B=Z.maximumIterations||20,C=null!=Z.maximumDistance?Z.maximumDistance:1/0;for(y=0;y<B;y++){const o=Z.desiredSlope??1e-6;let e=I(b);Math.abs(e)>o&&(e+=o);const n=e/S(b);if(isNaN(n)||b>=C&&n<0){if(!isFinite(C))return null;b=C,q=A(b);break}if(b-=n,b<=f.compared.sourceZoom||b<=f.compared.targetZoom)return null;const a=A(b);if(Math.abs(a-q)/q<=.005)break;q=a}const E=.3;return isNaN(q)||q>v*(1-E)||b<=f.compared.sourceZoom||b<=f.compared.targetZoom?null:b}function D(o,e){const n=Math.max(o.compared.sourceZoom,o.compared.targetZoom),a=o.source.zoomAtPixelsPerPan(o.desiredPixelFlow/o.compared.pan)/2;return a<n?null!=e.maximumDistance?n+(e.maximumDistance-n)/2:1.5*n:e.maximumDistance?Math.min(e.maximumDistance,a):a}export{f as optimalDistance};