City-Lifeline-Cockpit/.scratch/cockpit-shell-panel-layout/verify/t03-antimeridian-probe.mjs

import * as c from '../../../src/modules/cockpit/domain/camera.js'

/** 把经度序列解缠成连续弧长（每步取最短弧增量累加）。 */
function unwrap(lons) {
    let acc = 0
    const out = [0]
    for (let i = 1; i < lons.length; i += 1) {
        acc += c.shortestAngleDelta(lons[i - 1], lons[i])
        out.push(acc)
    }
    return out
}

const from = { lon: 179.9, lat: 10, height: 0 }
const to = { lon: -179.9, lat: 10, height: 0 }

console.log('== 换中心 lerpPivot 跨 ±180 ==')
const seq = []
for (let i = 0; i <= 10; i += 1) seq.push(c.lerpPivot(from, to, i / 10).lon)
const arc = unwrap(seq)
console.log('落点：', seq.map((v) => v.toFixed(3)).join(' → '))
console.log('弧长：', arc.map((v) => v.toFixed(3)).join(' → '))
console.log('总弧长 °：', arc[arc.length - 1].toFixed(3), '（0.2 才对；-359.8 表示绕了一圈）')
console.log('单调推进：', arc.every((v, i) => i === 0 || v >= arc[i - 1] - 1e-12))

console.log('')
console.log('== 阻尼 approachPivot 跨 ±180 ==')
let shown = { lon: 179.99, lat: 10, height: 0 }
const target = { lon: -179.99, lat: 10, height: 0 }
const seq2 = [shown.lon]
for (let i = 0; i < 10; i += 1) {
    shown = c.approachPivot(shown, target, 0.3)
    seq2.push(shown.lon)
}
const arc2 = unwrap(seq2)
console.log('落点：', seq2.map((v) => v.toFixed(3)).join(' → '))
console.log('总弧长 °：', arc2[arc2.length - 1].toFixed(3), '（应 ≈ -0.02）')
console.log('单调推进：', arc2.every((v, i) => i === 0 || Math.abs(v) >= Math.abs(arc2[i - 1]) - 1e-12))

console.log('')
console.log('== 反方向（-179.9 → 179.9）==')
const seq3 = []
for (let i = 0; i <= 10; i += 1) seq3.push(c.lerpPivot({ lon: -179.9, lat: 0 }, { lon: 179.9, lat: 0 }, i / 10).lon)
const arc3 = unwrap(seq3)
console.log('落点：', seq3.map((v) => v.toFixed(3)).join(' → '))
console.log('总弧长 °：', arc3[arc3.length - 1].toFixed(3), '（应 ≈ +0.2）')