60 lines
864 B
Go
60 lines
864 B
Go
// Package box provides a model and methods for junction boxes.
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package box
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import (
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"math"
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"strconv"
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"strings"
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)
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type Box interface {
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Y() int
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X() int
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Z() int
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DistanceFrom(neighbor Box) float64
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}
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type box struct {
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x int
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y int
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z int
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}
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func (b box) X() int {
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return b.x
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}
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func (b box) Y() int {
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return b.y
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}
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func (b box) Z() int {
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return b.z
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}
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func (b box) DistanceFrom(neighbor Box) float64 {
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xDiff := math.Pow(float64(b.x-neighbor.X()), 2)
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yDiff := math.Pow(float64(b.y-neighbor.Y()), 2)
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zDiff := math.Pow(float64(b.z-neighbor.Z()), 2)
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return math.Sqrt(xDiff + yDiff + zDiff)
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}
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func From(str string) Box {
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parts := strings.Split(str, ",")
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if len(parts) != 3 {
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panic("invalid junction box")
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}
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x, _ := strconv.Atoi(parts[0])
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y, _ := strconv.Atoi(parts[1])
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z, _ := strconv.Atoi(parts[2])
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return box{
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x: x,
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y: y,
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z: z,
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}
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}
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