starainrt
d40c4dfcd9
- 将 planetViews 从包级初始化改为 sync.Once 懒加载，避免 TinyGo interp 在编译期处理大型 float64 表切片索引时触发 unsupported fcmp - 将行星视图构建失败改为内部返回 error，并由兼容层统一 panic - 补充无效行星数据切片边界测试
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package planet
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import (
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"fmt"
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"sync"
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)
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type coordSeriesView struct {
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orders [6][]float64
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}
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type planetView struct {
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scale float64
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coords [3]coordSeriesView
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}
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var (
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planetViewsOnce sync.Once
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planetViewsCache []planetView
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planetViewsErr error
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)
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func planetViews() []planetView {
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planetViewsOnce.Do(func() {
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planetViewsCache, planetViewsErr = buildPlanetViews(planetRawData)
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})
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if planetViewsErr != nil {
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panic(planetViewsErr)
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}
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return planetViewsCache
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}
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func buildPlanetViews(rawData [][]float64) ([]planetView, error) {
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views := make([]planetView, len(rawData))
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for bodyIndex, raw := range rawData {
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if len(raw) < 20 {
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return nil, fmt.Errorf("planet raw data %d too short: %d", bodyIndex, len(raw))
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}
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view := planetView{scale: raw[0]}
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for zn := 0; zn < 3; zn++ {
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pn := zn*6 + 1
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for order := 0; order < 6; order++ {
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start := int(raw[pn+order])
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end := int(raw[pn+order+1])
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if start < 0 || end < start || end > len(raw) {
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return nil, fmt.Errorf("planet raw data %d coord %d order %d invalid cut: %d..%d (len=%d)", bodyIndex, zn, order, start, end, len(raw))
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}
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view.coords[zn].orders[order] = raw[start:end]
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}
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}
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views[bodyIndex] = view
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}
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return views, nil
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}
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