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苏尹岚
2021-03-09 13:54:01 +08:00
parent 3c355a16c5
commit 660de753d4
1 changed files with 4 additions and 2 deletions
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6
business/jxstore/report/report.go
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@@ -471,9 +471,11 @@ func CalculateCoverArea(coordinate []string, vendorID int) (area float64) {
}
var sum float64
for i := 0; i < len(xyList)-1; i++ {
sum += (xyList[i+1][0] - xyList[i][0]) * (xyList[i+1][1] + xyList[i][1])
// sum += (xyList[i+1][0] - xyList[i][0]) * (xyList[i+1][1] + xyList[i][1])
sum += xyList[i][0]*xyList[i+1][1] - xyList[i+1][0]*xyList[i][1]
}
sum += (xyList[0][0] - xyList[len(xyList)-1][0]) * (xyList[0][1] + xyList[len(xyList)-1][1])
// sum += (xyList[0][0] - xyList[len(xyList)-1][0]) * (xyList[0][1] + xyList[len(xyList)-1][1])
sum += xyList[len(xyList)-1][0]*xyList[0][1] - xyList[0][0]*xyList[len(xyList)-1][1]
sum /= float64(2)
area, _ = decimal.NewFromFloat(sum).Round(3).Float64()
return area