b612
9ee2163cc7
- 新增月掩恒星和行星：支持搜索、掩甚点、全球掩带及固定地点轨迹计算 - 支持恒星星表坐标转换、有限盘面行星接触事件和月掩 SVG 输出 - 新增日月食及月掩全球投影图、时间标记和 GeoJSON 地理数据接口 - 扩展日食中心线、南北界及偏食足迹采样，支持极区投影 - 修正站心时角、月出月落、月球视半径、折射和恒星自行计算 - 优化内外行星事件搜索、边界选择、极端输入处理和计算稳定性
58 lines
2.1 KiB
Go
58 lines
2.1 KiB
Go
package svg
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import "b612.me/astro/internal/svgmap"
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// EclipseMapProjection 控制全球日月食地图投影；零值根据事件几何选择投影。
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// EclipseMapProjection controls a global eclipse map projection. The zero value selects the projection from the event geometry.
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type EclipseMapProjection string
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const (
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// EclipseMapProjectionAuto 根据事件几何自动选择投影。
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// EclipseMapProjectionAuto selects a projection from event geometry.
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EclipseMapProjectionAuto EclipseMapProjection = ""
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// EclipseMapProjectionEquirectangular 使用等经纬投影。
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// EclipseMapProjectionEquirectangular uses the equirectangular projection.
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EclipseMapProjectionEquirectangular EclipseMapProjection = "equirectangular"
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// EclipseMapProjectionNorthPolar 使用北极方位等距投影。
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// EclipseMapProjectionNorthPolar uses the north-polar azimuthal equidistant projection.
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EclipseMapProjectionNorthPolar EclipseMapProjection = "north-polar"
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// EclipseMapProjectionSouthPolar 使用南极方位等距投影。
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// EclipseMapProjectionSouthPolar uses the south-polar azimuthal equidistant projection.
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EclipseMapProjectionSouthPolar EclipseMapProjection = "south-polar"
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)
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func internalEclipseMapProjection(value EclipseMapProjection) svgmap.Projection {
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return svgmap.Projection(value)
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}
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func validEclipseMapProjection(value EclipseMapProjection) bool {
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switch value {
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case EclipseMapProjectionAuto, EclipseMapProjectionEquirectangular,
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EclipseMapProjectionNorthPolar, EclipseMapProjectionSouthPolar:
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return true
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default:
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return false
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}
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}
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func eclipseMapProjectionLabel(projection svgmap.Projection, language string) string {
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if language == "en" {
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switch projection {
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case svgmap.ProjectionNorthPolar:
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return "North-polar azimuthal equidistant projection"
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case svgmap.ProjectionSouthPolar:
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return "South-polar azimuthal equidistant projection"
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default:
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return "Equirectangular projection"
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}
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}
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switch projection {
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case svgmap.ProjectionNorthPolar:
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return "北极方位等距投影"
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case svgmap.ProjectionSouthPolar:
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return "南极方位等距投影"
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default:
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return "等经纬投影"
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}
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}
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