feat: 扩展天文计算能力
- 新增日食、月食、本地可见性、中心线、半影区域、SVG 图示与沙罗周期信息 - 新增行星冲合、留、方照、物理星历、视直径、相位、亮肢角、轨道节点等计算 - 新增木星伽利略卫星位置、现象与接触事件计算 - 新增恒星星表、星座判定、自行修正与观测辅助能力 - 新增 coord、formula、orbit、sundial、lite/sun、lite/moon 等扩展包 - 完善农历年号、月相英文别名、视差角、大气质量、折射、日晷与双星计算 - 增加 NASA、JPL Horizons、IMCCE 等回归测试数据与基线测试 - 重构基础算法文件组织，补充大量公开 API 注释和语义回归测试 - 更新中文和英文 README，补充示例、精度说明、SVG 配图
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package astro_test
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import (
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"encoding/json"
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"math"
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"os"
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"testing"
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"b612.me/astro/basic"
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"b612.me/astro/planet"
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)
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type lowPrecisionSunSnapshot struct {
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LoBits uint64 `json:"lo_bits"`
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MBits uint64 `json:"m_bits"`
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EccBits uint64 `json:"ecc_bits"`
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PeriBits uint64 `json:"peri_bits"`
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MidBits uint64 `json:"mid_bits"`
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TrueLoBits uint64 `json:"true_lo_bits"`
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ApparentLoBits uint64 `json:"apparent_lo_bits"`
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ApparentRaBits uint64 `json:"apparent_ra_bits"`
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ApparentDecBits uint64 `json:"apparent_dec_bits"`
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TrueRaBits uint64 `json:"true_ra_bits"`
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TrueDecBits uint64 `json:"true_dec_bits"`
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DistanceBits uint64 `json:"distance_bits"`
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}
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type lowPrecisionMoonSnapshot struct {
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LoBits uint64 `json:"lo_bits"`
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SunAngleBits uint64 `json:"sun_angle_bits"`
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MBits uint64 `json:"m_bits"`
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LonXBits uint64 `json:"lonx_bits"`
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IBits uint64 `json:"i_bits"`
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RBits uint64 `json:"r_bits"`
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BBits uint64 `json:"b_bits"`
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TrueLoBits uint64 `json:"true_lo_bits"`
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TrueBoBits uint64 `json:"true_bo_bits"`
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AwayBits uint64 `json:"away_bits"`
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ApparentLoBits uint64 `json:"apparent_lo_bits"`
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TrueRaBits uint64 `json:"true_ra_bits"`
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TrueDecBits uint64 `json:"true_dec_bits"`
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}
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type lowPrecisionSample struct {
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UTC string `json:"utc"`
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TTJD float64 `json:"tt_jd"`
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Sun lowPrecisionSunSnapshot `json:"sun"`
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Moon lowPrecisionMoonSnapshot `json:"moon"`
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}
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func loadLowPrecisionSamples(t *testing.T) []lowPrecisionSample {
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t.Helper()
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data, err := os.ReadFile("testdata/low_precision_sun_moon_baseline.json")
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if err != nil {
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t.Fatal(err)
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}
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var samples []lowPrecisionSample
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if err := json.Unmarshal(data, &samples); err != nil {
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t.Fatal(err)
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}
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if len(samples) == 0 {
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t.Fatal("empty low precision baseline samples")
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}
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return samples
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}
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func TestLowPrecisionSunMoonBaselineRegression(t *testing.T) {
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samples := loadLowPrecisionSamples(t)
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assertBits := func(t *testing.T, name, utc string, got float64, want uint64) {
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t.Helper()
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if math.Float64bits(got) != want {
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t.Fatalf("%s regression at %s", name, utc)
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}
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}
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for _, sample := range samples {
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jd := sample.TTJD
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assertBits(t, "planet.SunLo", sample.UTC, planet.SunLo(jd), sample.Sun.LoBits)
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assertBits(t, "basic.SunLo", sample.UTC, basic.SunLo(jd), sample.Sun.LoBits)
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assertBits(t, "planet.SunM", sample.UTC, planet.SunM(jd), sample.Sun.MBits)
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assertBits(t, "basic.SunM", sample.UTC, basic.SunM(jd), sample.Sun.MBits)
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assertBits(t, "planet.Earthe", sample.UTC, planet.Earthe(jd), sample.Sun.EccBits)
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assertBits(t, "basic.Earthe", sample.UTC, basic.Earthe(jd), sample.Sun.EccBits)
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assertBits(t, "planet.EarthPI", sample.UTC, planet.EarthPI(jd), sample.Sun.PeriBits)
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assertBits(t, "basic.EarthPI", sample.UTC, basic.EarthPI(jd), sample.Sun.PeriBits)
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assertBits(t, "planet.SunMidFun", sample.UTC, planet.SunMidFun(jd), sample.Sun.MidBits)
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assertBits(t, "basic.SunMidFun", sample.UTC, basic.SunMidFun(jd), sample.Sun.MidBits)
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assertBits(t, "planet.SunTrueLo", sample.UTC, planet.SunTrueLo(jd), sample.Sun.TrueLoBits)
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assertBits(t, "basic.SunTrueLo", sample.UTC, basic.SunTrueLo(jd), sample.Sun.TrueLoBits)
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assertBits(t, "planet.SunApparentLo", sample.UTC, planet.SunApparentLo(jd), sample.Sun.ApparentLoBits)
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assertBits(t, "basic.SunApparentLo", sample.UTC, basic.SunApparentLo(jd), sample.Sun.ApparentLoBits)
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assertBits(t, "basic.SunApparentRa", sample.UTC, basic.SunApparentRa(jd), sample.Sun.ApparentRaBits)
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assertBits(t, "basic.SunApparentDec", sample.UTC, basic.SunApparentDec(jd), sample.Sun.ApparentDecBits)
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assertBits(t, "basic.SunTrueRa", sample.UTC, basic.SunTrueRa(jd), sample.Sun.TrueRaBits)
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assertBits(t, "basic.SunTrueDec", sample.UTC, basic.SunTrueDec(jd), sample.Sun.TrueDecBits)
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assertBits(t, "planet.Distance", sample.UTC, planet.Distance(jd), sample.Sun.DistanceBits)
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assertBits(t, "basic.Distance", sample.UTC, basic.Distance(jd), sample.Sun.DistanceBits)
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assertBits(t, "planet.MoonLo", sample.UTC, planet.MoonLo(jd), sample.Moon.LoBits)
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assertBits(t, "basic.MoonLo", sample.UTC, basic.MoonLo(jd), sample.Moon.LoBits)
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assertBits(t, "planet.SunMoonAngle", sample.UTC, planet.SunMoonAngle(jd), sample.Moon.SunAngleBits)
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assertBits(t, "basic.SunMoonAngle", sample.UTC, basic.SunMoonAngle(jd), sample.Moon.SunAngleBits)
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assertBits(t, "planet.MoonM", sample.UTC, planet.MoonM(jd), sample.Moon.MBits)
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assertBits(t, "basic.MoonM", sample.UTC, basic.MoonM(jd), sample.Moon.MBits)
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assertBits(t, "planet.MoonLonX", sample.UTC, planet.MoonLonX(jd), sample.Moon.LonXBits)
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assertBits(t, "basic.MoonLonX", sample.UTC, basic.MoonLonX(jd), sample.Moon.LonXBits)
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assertBits(t, "planet.MoonI", sample.UTC, planet.MoonI(jd), sample.Moon.IBits)
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assertBits(t, "basic.MoonI", sample.UTC, basic.MoonI(jd), sample.Moon.IBits)
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assertBits(t, "planet.MoonR", sample.UTC, planet.MoonR(jd), sample.Moon.RBits)
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assertBits(t, "basic.MoonR", sample.UTC, basic.MoonR(jd), sample.Moon.RBits)
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assertBits(t, "planet.MoonB", sample.UTC, planet.MoonB(jd), sample.Moon.BBits)
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assertBits(t, "basic.MoonB", sample.UTC, basic.MoonB(jd), sample.Moon.BBits)
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assertBits(t, "planet.MoonTrueLo", sample.UTC, planet.MoonTrueLo(jd), sample.Moon.TrueLoBits)
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assertBits(t, "basic.MoonTrueLo", sample.UTC, basic.MoonTrueLo(jd), sample.Moon.TrueLoBits)
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assertBits(t, "planet.MoonTrueBo", sample.UTC, planet.MoonTrueBo(jd), sample.Moon.TrueBoBits)
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assertBits(t, "basic.MoonTrueBo", sample.UTC, basic.MoonTrueBo(jd), sample.Moon.TrueBoBits)
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assertBits(t, "planet.MoonAway", sample.UTC, planet.MoonAway(jd), sample.Moon.AwayBits)
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assertBits(t, "basic.MoonAway", sample.UTC, basic.MoonAway(jd), sample.Moon.AwayBits)
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assertBits(t, "basic.MoonApparentLo", sample.UTC, basic.MoonApparentLo(jd), sample.Moon.ApparentLoBits)
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assertBits(t, "basic.MoonTrueRa", sample.UTC, basic.MoonTrueRa(jd), sample.Moon.TrueRaBits)
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assertBits(t, "basic.MoonTrueDec", sample.UTC, basic.MoonTrueDec(jd), sample.Moon.TrueDecBits)
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}
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}
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func TestDerivedHighPrecisionTruncationFullMatchesDefault(t *testing.T) {
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jd := 2469808.7654321
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lon := 116.391
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lat := 39.907
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tz := 8.0
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assertSame := func(name string, got, want float64) {
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t.Helper()
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if math.Float64bits(got) != math.Float64bits(want) {
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t.Fatalf("%s full-n mismatch", name)
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}
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}
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assertSamePair := func(name string, got1, got2, want1, want2 float64) {
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t.Helper()
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assertSame(name+".1", got1, want1)
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assertSame(name+".2", got2, want2)
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}
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assertSame("HSunTrueLo", basic.HSunTrueLo(jd), basic.HSunTrueLoN(jd, -1))
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assertSame("HSunTrueBo", basic.HSunTrueBo(jd), basic.HSunTrueBoN(jd, -1))
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assertSame("HSunApparentLo", basic.HSunApparentLo(jd), basic.HSunApparentLoN(jd, -1))
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assertSame("SunLoGXC", basic.SunLoGXC(jd), basic.SunLoGXCN(jd, -1))
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assertSame("EarthAway", basic.EarthAway(jd), basic.EarthAwayN(jd, -1))
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assertSame("HSunApparentRa", basic.HSunApparentRa(jd), basic.HSunApparentRaN(jd, -1))
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assertSame("HSunTrueRa", basic.HSunTrueRa(jd), basic.HSunTrueRaN(jd, -1))
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assertSame("HSunApparentDec", basic.HSunApparentDec(jd), basic.HSunApparentDecN(jd, -1))
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assertSame("HSunTrueDec", basic.HSunTrueDec(jd), basic.HSunTrueDecN(jd, -1))
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ra1, dec1 := basic.HSunApparentRaDec(jd)
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ra2, dec2 := basic.HSunApparentRaDecN(jd, -1)
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assertSamePair("HSunApparentRaDec", ra1, dec1, ra2, dec2)
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assertSame("HMoonTrueLo", basic.HMoonTrueLo(jd), basic.HMoonTrueLoN(jd, -1))
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assertSame("HMoonTrueBo", basic.HMoonTrueBo(jd), basic.HMoonTrueBoN(jd, -1))
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assertSame("HMoonAway", basic.HMoonAway(jd), basic.HMoonAwayN(jd, -1))
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assertSame("HMoonApparentLo", basic.HMoonApparentLo(jd), basic.HMoonApparentLoN(jd, -1))
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assertSame("HMoonTrueRa", basic.HMoonTrueRa(jd), basic.HMoonTrueRaN(jd, -1))
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assertSame("HMoonTrueDec", basic.HMoonTrueDec(jd), basic.HMoonTrueDecN(jd, -1))
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ra1, dec1 = basic.HMoonTrueRaDec(jd)
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ra2, dec2 = basic.HMoonTrueRaDecN(jd, -1)
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assertSamePair("HMoonTrueRaDec", ra1, dec1, ra2, dec2)
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ra1, dec1 = basic.HMoonApparentRaDec(jd, lon, lat, tz)
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ra2, dec2 = basic.HMoonApparentRaDecN(jd, lon, lat, tz, -1)
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assertSamePair("HMoonApparentRaDec", ra1, dec1, ra2, dec2)
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assertSame("HMoonApparentRa", basic.HMoonApparentRa(jd, lon, lat, tz), basic.HMoonApparentRaN(jd, lon, lat, tz, -1))
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assertSame("HMoonApparentDec", basic.HMoonApparentDec(jd, lon, lat, tz), basic.HMoonApparentDecN(jd, lon, lat, tz, -1))
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assertSame("HMoonAzimuth", basic.HMoonAzimuth(jd, lon, lat, tz), basic.HMoonAzimuthN(jd, lon, lat, tz, -1))
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assertSame("HMoonHeight", basic.HMoonHeight(jd, lon, lat, tz), basic.HMoonHeightN(jd, lon, lat, tz, -1))
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}
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