adventofcode/helpers/coordinate.go

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2019-12-10 15:17:50 +00:00
package aoc
import (
"fmt"
"math"
"strings"
)
type Coordinate struct {
X, Y int
}
func CoordinateFromString(str string) *Coordinate {
c := Coordinate{}
r := strings.NewReader(str)
_, err := fmt.Fscanf(r, "[%d, %d]", c.X, c.Y)
if err != nil {
panic(err)
}
return &c
}
func (c Coordinate) Angle(t Coordinate) float64 {
ret := math.Atan2(float64(t.X-c.X), float64(c.Y-t.Y)) * 180 / math.Pi
if ret < 0 {
ret = ret + 360
}
return ret
}
func (c Coordinate) String() string {
return fmt.Sprintf("[%d, %d]", c.X, c.Y)
}
func (c Coordinate) Distance(t Coordinate) int {
return AbsInt(c.X-t.X) + AbsInt(c.Y-t.Y)
}