feat: 完善时标与天象几何计算并扩展输出接口
- 新增时标、ΔT 模型、质心时间与 UT1 支持 - 改进日月食、月掩、行星事件及路径边界计算 - 完善恒星三维自行与动态距离传播 - 扩展 SVG、GeoJSON、KML 输出与底层距离换算工具 - 整理中英文手册、示例资源及回归测试
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package formula
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import "b612.me/astro/tools"
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// DistanceUnit 距离输入单位,与 tools 共用同一套枚举 / a unit accepted for distance input, shared with tools.
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type DistanceUnit = tools.DistanceUnit
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const (
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// DistanceParsec 秒差距 / parsec.
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DistanceParsec = tools.DistanceParsec
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// DistanceLightYear 光年 / light-year.
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DistanceLightYear = tools.DistanceLightYear
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// DistanceAU 天文单位 / astronomical unit.
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DistanceAU = tools.DistanceAU
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)
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// Distance 把给定单位的距离换算为秒差距 / converts a distance in the given unit to parsecs.
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//
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// 换算基元位于 tools,本函数只是对外转发;非正数、NaN 与未知单位返回 NaN。
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func Distance(value float64, unit DistanceUnit) float64 {
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return tools.DistanceToParsecs(value, unit)
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}
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