b612
044f2f4381
- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算 - 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询 - 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出 - 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解 - 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤 - 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持 - 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理 - 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package ephem
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import (
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"errors"
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"reflect"
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)
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// Body NAIF 天体编号 / NAIF body code.
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type Body int
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const (
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SSB Body = 0
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Mercury Body = 1
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Venus Body = 2
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EMB Body = 3
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Mars Body = 4
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Jupiter Body = 5
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Saturn Body = 6
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Uranus Body = 7
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Neptune Body = 8
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Sun Body = 10
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Moon Body = 301
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Earth Body = 399
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)
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var (
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// ErrOutOfRange 时刻超出星历覆盖 / epoch outside the ephemeris coverage.
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ErrOutOfRange = errors.New("ephem: epoch outside coverage")
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// ErrUnsupportedBody 星历不含该天体 / body not provided by the ephemeris.
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ErrUnsupportedBody = errors.New("ephem: unsupported body")
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// ErrNoEngine 实例未配置引擎 / instance has no engine.
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ErrNoEngine = errors.New("ephem: instance has no engine")
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// ErrUnsupportedApparent 引擎不支持视位置 / engine does not support apparent positions.
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ErrUnsupportedApparent = errors.New("ephem: apparent positions are unsupported")
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)
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// Engine 几何星历：ICRF 赤道，km 与 km/日，时间 TDB；只读、可并发 / geometric ephemeris in ICRF, km and km/day, TDB.
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type Engine interface {
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State(target, center Body, jdTDB float64) (pos, vel [3]float64, err error)
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Coverage(target Body) (start, end float64, ok bool)
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}
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// IsNilEngine 引擎为 nil 或持有 nil 指针等空值 / engine is nil or wraps a nil value.
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func IsNilEngine(engine Engine) bool {
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if engine == nil {
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return true
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}
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value := reflect.ValueOf(engine)
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switch value.Kind() {
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case reflect.Ptr, reflect.Map, reflect.Slice, reflect.Func, reflect.Interface:
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return value.IsNil()
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}
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return false
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}
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