mirror of
https://github.com/onyx-and-iris/aoc2023.git
synced 2025-11-04 06:41:45 +00:00
41 lines
692 B
Go
41 lines
692 B
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
func debugPrint() {
|
|
for _, points := range pointsArray {
|
|
for _, point := range points.points {
|
|
if contains(loop, point.coords) {
|
|
fmt.Printf("%c ", point.identifier)
|
|
} else {
|
|
fmt.Printf(". ")
|
|
}
|
|
}
|
|
fmt.Printf("\n")
|
|
}
|
|
}
|
|
|
|
var loop []coords
|
|
|
|
// two returns the number of coords that sit inside the polygon
|
|
func two(lines []string) int {
|
|
if log.GetLevel() == log.DebugLevel {
|
|
debugPrint()
|
|
}
|
|
|
|
area := 0
|
|
for i := 0; i < len(loop); i++ {
|
|
next := loop[(i+1)%len(loop)]
|
|
area += loop[i].X*next.Y - loop[i].Y*next.X
|
|
}
|
|
|
|
area = int(math.Abs(float64(area))) / 2
|
|
|
|
return area - len(loop)/2 + 1
|
|
}
|