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41 lines
692 B
Go
41 lines
692 B
Go
package main
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import (
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"fmt"
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"math"
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log "github.com/sirupsen/logrus"
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)
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func debugPrint() {
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for _, points := range pointsArray {
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for _, point := range points.points {
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if contains(loop, point.coords) {
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fmt.Printf("%c ", point.identifier)
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} else {
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fmt.Printf(". ")
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}
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}
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fmt.Printf("\n")
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}
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}
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var loop []coords
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// two returns the number of coords that sit inside the polygon
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func two(lines []string) int {
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if log.GetLevel() == log.DebugLevel {
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debugPrint()
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}
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area := 0
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for i := 0; i < len(loop); i++ {
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next := loop[(i+1)%len(loop)]
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area += loop[i].X*next.Y - loop[i].Y*next.X
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}
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area = int(math.Abs(float64(area))) / 2
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return area - len(loop)/2 + 1
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}
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