b612
16c62a97d5
- 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
46 lines
1.8 KiB
Go
46 lines
1.8 KiB
Go
package basic
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"b612.me/astro/internal/geodata"
|
|
)
|
|
|
|
// TestSolarEclipse18741010GrazingAnnularBandContainsSweep pins the other end of
|
|
// the grazing annular family: a one-limit path whose analytic sweep returns a
|
|
// band that still terminates 48 km inside its own sampled umbra. The band must
|
|
// be rebuilt from those samples instead of being exported as the short ribbon.
|
|
func TestSolarEclipse18741010GrazingAnnularBandContainsSweep(t *testing.T) {
|
|
result := SolarEclipsePartialFootprints(
|
|
JDCalc(1874, 10, 10),
|
|
SolarEclipsePartialFootprintOptions{
|
|
StepDays: 2.0 / 1440.0, BoundaryPoints: 96, RiseSetStepDays: 2.0 / 1440.0,
|
|
},
|
|
)
|
|
if result.Eclipse.Type != SolarEclipseAnnular ||
|
|
result.Eclipse.Centrality != SolarEclipseCentralOneLimit {
|
|
t.Fatalf("type=%s centrality=%s, want a one-limit annular eclipse",
|
|
result.Eclipse.Type, result.Eclipse.Centrality)
|
|
}
|
|
if len(result.CentralBandSegments) != 1 {
|
|
t.Fatalf("central-band segments=%d, want one closed band", len(result.CentralBandSegments))
|
|
}
|
|
ring := result.CentralBandSegments[0]
|
|
if len(ring) < 4 || solarEclipsePathDistanceKM(ring[0], ring[len(ring)-1]) > 0.01 {
|
|
t.Fatal("central-band envelope is not closed")
|
|
}
|
|
if !solarEclipseBandContainsFootprintsWithinKM(
|
|
result.CentralBandSegments, result.CentralBandFootprints,
|
|
solarEclipseCentralBandUnionContainmentToleranceKM,
|
|
) {
|
|
t.Fatal("central band does not contain the sampled umbral footprints")
|
|
}
|
|
// A station with two minutes of annular phase, 14 degrees above the horizon,
|
|
// used to fall outside the exported band by more than 400 km.
|
|
matrix := [][]geodata.GeoPoint{geodataRingFromPath(ring)}
|
|
point := []geodata.GeoPoint{{Longitude: 60.5, Latitude: 57.5}}
|
|
if !geodata.SphericalPolygonsContainPoints(matrix, point)[0] {
|
|
t.Fatal("central band misses the visible annular region at (60.5,57.5)")
|
|
}
|
|
}
|