b612
2bf8478639
- 新增日月食中心带、偏食带、阴影足迹、等时线、食分线及升落边界计算，支持极区与混合食拓扑 - 新增日食单时刻阴影求解器、站心状态查询、批量采样和 ΔT 覆盖接口 - 重构恒星与行星月掩路径，补充有限盘面接触、站心修正、掩带宽度、极区投影及升落边界 - 扩展 SVG 与 GeoJSON 输出，支持详细面板、全球/极区/地球投影、边界闭合、时间标记和拓扑签名 - 扩展日月食候选搜索、局地搜索、沙罗序列预计算与范围外推，补充系列锚点和成员一致性校验 - 补齐古历纪年、儒略历独有闰日、多公历候选、历法改革跨日及精确日期运算接口 - 优化 ΔT、章动、恒星时、月球地平线、事件根搜索和本地星历缓存，降低重复计算开销并提升边界稳定
33 lines
1.6 KiB
Go
33 lines
1.6 KiB
Go
package svg
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import "b612.me/astro/internal/svgmap"
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// MapProjection 控制全球月掩地图使用的投影。
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// 零值根据事件几何自动选择投影。
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// 与 eclipse/svg.EclipseMapProjection 是同一概念的两套名字，取值字符串逐对相同。
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// MapProjection controls the projection used by a global occultation map.
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// The zero value selects a projection from the event geometry.
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type MapProjection string
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const (
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// MapProjectionAuto 根据事件几何自动选择投影。
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// MapProjectionAuto selects a projection from event geometry.
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MapProjectionAuto MapProjection = ""
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// MapProjectionEquirectangular 使用等经纬投影。
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// MapProjectionEquirectangular uses the equirectangular projection.
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MapProjectionEquirectangular MapProjection = "equirectangular"
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// MapProjectionNorthPolar 使用北极方位等距投影。
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// MapProjectionNorthPolar uses the north-polar azimuthal equidistant projection.
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MapProjectionNorthPolar MapProjection = "north-polar"
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// MapProjectionSouthPolar 使用南极方位等距投影。
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// MapProjectionSouthPolar uses the south-polar azimuthal equidistant projection.
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MapProjectionSouthPolar MapProjection = "south-polar"
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// MapProjectionOrthographic 使用正射球面投影，视点取事件中心，只画朝向观察者的半球。
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// MapProjectionOrthographic uses the orthographic globe, viewed from the event centre; only the facing hemisphere is drawn.
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MapProjectionOrthographic MapProjection = "orthographic"
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)
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func internalMapProjection(value MapProjection) svgmap.Projection {
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return svgmap.Projection(value)
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}
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