aoc2023/day-16/mover.go

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2023-12-17 15:31:11 +00:00
package main
import (
"fmt"
)
type coords struct {
X int
Y int
}
func newCoords(x, y int) coords {
return coords{X: x, Y: y}
}
// node represents a single node with coordinates and direction
type node struct {
coords
direction int
}
func newNode(x, y int, direction int) node {
return node{coords: newCoords(x, y), direction: direction}
}
// String implements the fmt.Stringer interface
func (n node) String() string {
return fmt.Sprintf("%v%s", n.coords, dirs[n.direction])
}
type mover struct {
node
nodes []node
}
// newMover sets the start coordinates and direction
// it returns a mover type
func newMover(n node) *mover {
return &mover{node: n, nodes: make([]node, 0)}
}
// direction returns the current node direction
func (m *mover) direction() int {
return m.node.direction
}
// setDirection sets the current node direction
func (m *mover) setDirection(val int) {
m.node.direction = val
}
// move shifts the X,Y coordinate by one depending on direction
func (m *mover) move() {
switch m.node.direction {
case N:
m.Y--
case S:
m.Y++
case W:
m.X--
case E:
m.X++
}
}