52 lines
1.8 KiB
Go
52 lines
1.8 KiB
Go
|
package basic
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"testing"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestSolarEclipseAnnularEnvelopeContainsShadow(t *testing.T) {
|
||
|
|
for _, date := range [][3]int{{4005, 4, 22}, {4329, 6, 12}} {
|
||
|
|
t.Run(fmt.Sprintf("%04d-%02d-%02d", date[0], date[1], date[2]), func(t *testing.T) {
|
||
|
|
result := SolarEclipsePartialFootprints(JDECalc(date[0], date[1], float64(date[2])), SolarEclipsePartialFootprintOptions{
|
||
|
|
StepDays: 2.0 / 1440, BoundaryPoints: 96, CentralShadowStepDays: 1.0 / 1440,
|
||
|
|
})
|
||
|
|
if len(result.CentralBandSegments) == 0 {
|
||
|
|
t.Fatal("missing central envelope")
|
||
|
|
}
|
||
|
|
// The static horizon caps describe visible local greatest. Shadow
|
||
|
|
// slices at the limb also include sites whose greatest is below the
|
||
|
|
// horizon; use fully risen samples to audit the two side envelopes.
|
||
|
|
var visible []SolarEclipsePartialFootprint
|
||
|
|
for _, footprint := range result.CentralShadowFootprints {
|
||
|
|
for _, boundary := range footprint.Boundaries {
|
||
|
|
for _, point := range boundary {
|
||
|
|
if point.SunAltitude > 0.5 {
|
||
|
|
visible = append(visible, SolarEclipsePartialFootprint{Boundaries: [][]SolarEclipsePathPoint{{point}}})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if len(visible) == 0 {
|
||
|
|
t.Fatal("missing visible shadow witnesses")
|
||
|
|
}
|
||
|
|
miss := solarEclipseBandFootprintMissDistanceKM(result.CentralBandSegments, visible)
|
||
|
|
if miss > 2 {
|
||
|
|
t.Fatalf("central envelope excludes instantaneous shadow by %.3f km", miss)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkSolarEclipseCentralEnvelopePath(b *testing.B) {
|
||
|
|
for _, date := range [][3]int{{4005, 4, 22}, {4329, 6, 12}, {2024, 4, 8}} {
|
||
|
|
b.Run(fmt.Sprint(date), func(b *testing.B) {
|
||
|
|
seed := JDECalc(date[0], date[1], float64(date[2]))
|
||
|
|
b.ReportAllocs()
|
||
|
|
for i := 0; i < b.N; i++ {
|
||
|
|
SolarEclipseCentralPath(seed, SolarEclipsePathOptions{StepDays: 2.0 / 1440, TargetSpacingKM: 150})
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|