49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
|
package geojson_test
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/json"
|
||
|
|
"math"
|
||
|
|
"testing"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"b612.me/astro/eclipse"
|
||
|
|
"b612.me/astro/geojson"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestSolarHybridThinComponentsDoNotCross(t *testing.T) {
|
||
|
|
for _, date := range [][3]int{{881, 3, 4}, {985, 7, 20}, {1703, 1, 17}, {2386, 4, 29}, {3405, 7, 18}, {3667, 1, 7}} {
|
||
|
|
day := time.Date(date[0], time.Month(date[1]), date[2], 0, 0, 0, 0, time.UTC)
|
||
|
|
t.Run(day.Format("2006-01-02"), func(t *testing.T) {
|
||
|
|
partial, ok := eclipse.SolarEclipsePartialFootprints(day, eclipse.SolarEclipsePartialFootprintOptions{
|
||
|
|
Step: 5 * time.Minute, CentralShadowStep: 5 * time.Minute, RiseSetStep: 2 * time.Minute, BoundaryPoints: 96,
|
||
|
|
})
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("missing solar eclipse")
|
||
|
|
}
|
||
|
|
data, err := geojson.MarshalSolarEclipse(partial, nil)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
band := featureWithRole(t, decodeCollection(t, data), "central-band")
|
||
|
|
var polygons [][][][]float64
|
||
|
|
if err := json.Unmarshal(band.Geometry.Coordinates, &polygons); err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
for pi, polygon := range polygons {
|
||
|
|
for _, ring := range polygon {
|
||
|
|
for i := 0; i+1 < len(ring); i++ {
|
||
|
|
for j := i + 2; j+1 < len(ring); j++ {
|
||
|
|
if i == 0 && j+1 == len(ring)-1 || math.Abs(ring[i][0]) == 180 && math.Abs(ring[i+1][0]) == 180 || math.Abs(ring[j][0]) == 180 && math.Abs(ring[j+1][0]) == 180 {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if geoJSONSegmentsCross(ring[i], ring[i+1], ring[j], ring[j+1]) {
|
||
|
|
t.Fatalf("component %d crosses itself at edges %d/%d", pi, i, j)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|