City-Lifeline-Cockpit/src/modules/cockpit/domain/detailBands.js

/** Select already nearest-first candidates under the global budget.
 * The previous near-band quota rejected close buildings but admitted farther ones.
 * Crossing 300m could therefore unload a cached near region and leave permanent coarse blocks.
 * LOD refinement belongs to Cesium's tile tree, not to a region eviction quota.
 */
export function selectByDistanceBands(candidates, options = {}) {
    const list = Array.isArray(candidates) ? candidates.filter(Boolean) : []
    const number = (value, fallback) => Number.isFinite(Number(value)) ? Number(value) : fallback
    const maxContents = number(options.maxContents, 1200)
    const maxBytes = number(options.maxDecodedBytes, 256 * 1024 * 1024)
    const maxRegions = number(options.maxRegions, Infinity)
    const selected = []
    let contents = 0, bytes = 0
    for (const region of list) {
        if (selected.length >= maxRegions) break
        const count = number(region.contentCount, 0), size = number(region.decodedGeometryBytes, 0)
        if (contents + count > maxContents || bytes + size > maxBytes) continue
        selected.push(region.id); contents += count; bytes += size
    }
    return selected
}