45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
|
package basic
|
||
|
|
|
||
|
|
import (
|
||
|
|
"math"
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
. "b612.me/astro/tools"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestEclipticToEquatorialCachedObliquityMatchesRepeatedEvaluation(t *testing.T) {
|
||
|
|
for _, test := range []struct {
|
||
|
|
jde float64
|
||
|
|
lo float64
|
||
|
|
bo float64
|
||
|
|
}{
|
||
|
|
{jde: 2451545.0, lo: 0, bo: 0},
|
||
|
|
{jde: 2460832.0, lo: 193.25, bo: -5.75},
|
||
|
|
{jde: 2378496.5, lo: 359.999, bo: 87.5},
|
||
|
|
} {
|
||
|
|
legacyDec := ArcSin(
|
||
|
|
Sin(test.bo)*Cos(TrueObliquity(test.jde)) +
|
||
|
|
Cos(test.bo)*Sin(TrueObliquity(test.jde))*Sin(test.lo),
|
||
|
|
)
|
||
|
|
legacyRA := math.Atan2(
|
||
|
|
Sin(test.lo)*Cos(TrueObliquity(test.jde))-Tan(test.bo)*Sin(TrueObliquity(test.jde)),
|
||
|
|
Cos(test.lo),
|
||
|
|
) * 180 / math.Pi
|
||
|
|
if legacyRA < 0 {
|
||
|
|
legacyRA += 360
|
||
|
|
}
|
||
|
|
|
||
|
|
ra, dec := LoBoToRaDec(test.jde, test.lo, test.bo)
|
||
|
|
if ra != legacyRA || dec != legacyDec {
|
||
|
|
t.Fatalf("LoBoToRaDec(%v, %v, %v) = %.15g %.15g, want %.15g %.15g",
|
||
|
|
test.jde, test.lo, test.bo, ra, dec, legacyRA, legacyDec)
|
||
|
|
}
|
||
|
|
if got := LoToRa(test.jde, test.lo, test.bo); got != legacyRA {
|
||
|
|
t.Fatalf("LoToRa(%v, %v, %v) = %.15g, want %.15g", test.jde, test.lo, test.bo, got, legacyRA)
|
||
|
|
}
|
||
|
|
if got := BoToDec(test.jde, test.lo, test.bo); got != legacyDec {
|
||
|
|
t.Fatalf("BoToDec(%v, %v, %v) = %.15g, want %.15g", test.jde, test.lo, test.bo, got, legacyDec)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|