More work on 2021 day 19
This commit is contained in:
parent
3bf29e69ae
commit
586ec1330e
122
2021/day19/main.go.old.2
Normal file
122
2021/day19/main.go.old.2
Normal file
@ -0,0 +1,122 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"strings"
|
||||
|
||||
h "git.bullercodeworks.com/brian/adventofcode/helpers"
|
||||
)
|
||||
|
||||
func main() {
|
||||
fmt.Println("vim-go")
|
||||
inp := h.StdinToStringSlice()
|
||||
part1(inp)
|
||||
}
|
||||
|
||||
func part1(inp []string) {
|
||||
scanners := parseScanners(inp)
|
||||
m, l := matchScanners(scanners)
|
||||
fmt.Println(m)
|
||||
fmt.Println(l)
|
||||
}
|
||||
|
||||
func parseScanners(inp []string) []Scanner {
|
||||
var scanners []Scanner
|
||||
for i := range inp {
|
||||
if strings.HasPrefix(inp[i], "---") {
|
||||
// Find the next empty line
|
||||
end := i
|
||||
for ; end < len(inp); end++ {
|
||||
if inp[end] == "" {
|
||||
break
|
||||
}
|
||||
}
|
||||
// a new scanner
|
||||
wrk, err := NewScannerFromInput(inp[i:end])
|
||||
if err == nil {
|
||||
scanners = append(scanners, wrk)
|
||||
} else {
|
||||
fmt.Println("Error parsing scanners")
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
}
|
||||
return scanners
|
||||
}
|
||||
|
||||
type Match struct {
|
||||
beacon Beacon
|
||||
rotation int
|
||||
}
|
||||
|
||||
func matchScanners(scanners []Scanner) (map[Pair]Match, []int) {
|
||||
matched := make(map[Pair]Match)
|
||||
newMatch := []int{0}
|
||||
remaining := make(map[int]bool)
|
||||
for i := 1; i < len(scanners); i++ {
|
||||
remaining[i] = true
|
||||
}
|
||||
prev := make([]int, len(scanners))
|
||||
for len(remaining) > 0 {
|
||||
fmt.Println("Remaining:", len(remaining))
|
||||
next := []int{}
|
||||
for _, mID := range newMatch {
|
||||
fmt.Println(" Working", mID)
|
||||
for uID := range remaining {
|
||||
fmt.Println(" ->", uID)
|
||||
if _, ok := matched[Pair{mID, uID}]; ok {
|
||||
continue
|
||||
}
|
||||
for _, finger := range scanners[mID].prints {
|
||||
for _, fWrk := range scanners[uID].prints {
|
||||
if finger.area == fWrk.area && finger.circumference == fWrk.circumference {
|
||||
// Found a matching print in both scanners, figure out orientation
|
||||
tx := findTranslations(finger, fWrk)
|
||||
fmt.Println("Translations:", tx)
|
||||
//fb, fRotID := findTranslation(finger, fWrk)
|
||||
for k, v := range tx {
|
||||
if len(v) >= 3 {
|
||||
fmt.Println("Found:", v)
|
||||
prev[uID] = mID
|
||||
matched[Pair{mID, uID}] = Match{k, v[0].rotID}
|
||||
next = append(next, uID)
|
||||
delete(remaining, uID)
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
newMatch = next
|
||||
}
|
||||
return matched, prev
|
||||
}
|
||||
|
||||
func findTranslations(f1, f2 Triangle) map[Beacon][]Translation {
|
||||
//func findTranslation(f1, f2 Triangle) (Beacon, int) {
|
||||
tx := make(map[Beacon][]Translation)
|
||||
for rID := 0; rID < 24; rID++ {
|
||||
for oIdx, orig := range []Beacon{f1.a, f1.b, f1.c} {
|
||||
for fIdx, foreign := range []Beacon{f2.a, f2.b, f2.c} {
|
||||
diff := foreign.Rotate(rID).Sub(orig)
|
||||
t := Translation{oIdx, fIdx, rID}
|
||||
if v, ok := tx[diff]; ok {
|
||||
v = append(v, t)
|
||||
tx[diff] = v
|
||||
} else {
|
||||
tx[diff] = []Translation{t}
|
||||
}
|
||||
}
|
||||
}
|
||||
for _, v := range tx {
|
||||
// If we find 3, we have a match
|
||||
if len(v) >= 3 {
|
||||
return tx
|
||||
}
|
||||
}
|
||||
}
|
||||
return tx
|
||||
}
|
||||
126
2021/day19/structs.go
Normal file
126
2021/day19/structs.go
Normal file
@ -0,0 +1,126 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
h "git.bullercodeworks.com/brian/adventofcode/helpers"
|
||||
)
|
||||
|
||||
type scanner struct {
|
||||
number int
|
||||
region map[h.Coordinate]bool
|
||||
beacons []beacon
|
||||
}
|
||||
|
||||
func NewScanner(b []beacon) scanner {
|
||||
return scanner{beacons: b}
|
||||
}
|
||||
|
||||
func NewScannerFromInput(inp []string) (scanner, error) {
|
||||
s := scanner{}
|
||||
r := strings.NewReader(inp[0])
|
||||
_, err := fmt.Fscanf(r, "--- scanner %d ---", &s.number)
|
||||
if err != nil {
|
||||
return s, errors.New("No Scanner ID")
|
||||
}
|
||||
for _, v := range inp[1:] {
|
||||
r = strings.NewReader(v)
|
||||
b := beacon{}
|
||||
_, err := fmt.Fscanf(r, "%d,%d,%d", &b.x, &b.y, &b.z)
|
||||
if err == nil {
|
||||
s.beacons = append(s.beacons, b)
|
||||
}
|
||||
}
|
||||
return s, nil
|
||||
}
|
||||
|
||||
func (s scanner) allRotations() []scanner {
|
||||
var ret []scanner
|
||||
var beacons [][]beacon
|
||||
for i := range s.beacons {
|
||||
beacons = append(beacons, s.beacons[i].allRotations())
|
||||
}
|
||||
for i := range beacons {
|
||||
ret = append(ret, NewScanner(beacons[i]))
|
||||
}
|
||||
return ret
|
||||
}
|
||||
|
||||
func (s scanner) getTransformedIfOverlap(w scanner) (transformedScanner, error) {
|
||||
for _, otherReoriented := range w.allRotations() {
|
||||
for _, first := range s.beacons {
|
||||
for _, second := range otherReoriented.beacons {
|
||||
otherPosition := first.sub(second)
|
||||
var otherTransformed []beacon
|
||||
for _, it := range otherReoriented.beacons {
|
||||
otherTransformed = append(otherTransformed, otherPosition.add(it))
|
||||
}
|
||||
// Check if otherTransformed has at least 12 beacons in common with s
|
||||
var count int
|
||||
for _, chkI := range otherTransformed {
|
||||
for _, chkJ := range s.beacons {
|
||||
if chkI.equals(chkJ) {
|
||||
count++
|
||||
if count >= 12 {
|
||||
return transformedScanner{
|
||||
beacons: otherTransformed,
|
||||
position: otherPosition,
|
||||
}, nil
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return transformedScanner{}, errors.New("Scanners don't overlap")
|
||||
}
|
||||
|
||||
func (s scanner) String() string {
|
||||
return fmt.Sprintf("-- Scanner %d (%d beacons) ---", s.number, len(s.beacons))
|
||||
}
|
||||
|
||||
type beacon struct {
|
||||
x, y, z int
|
||||
}
|
||||
|
||||
func (b beacon) sub(c beacon) beacon {
|
||||
return beacon{
|
||||
x: b.x - c.x,
|
||||
y: b.y - c.y,
|
||||
z: b.z - c.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b beacon) add(c beacon) beacon {
|
||||
return beacon{
|
||||
x: b.x + c.x,
|
||||
y: b.y + c.y,
|
||||
z: b.z + c.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b beacon) equals(c beacon) bool {
|
||||
return b.x == c.x && b.y == c.y && b.z == c.z
|
||||
}
|
||||
|
||||
func (b beacon) allRotations() []beacon {
|
||||
return []beacon{
|
||||
{b.x, b.y, b.z}, {b.x, -b.z, b.y}, {b.x, -b.y, -b.z}, {b.x, b.z, -b.y}, {-b.x, -b.y, b.z},
|
||||
{-b.x, -b.z, -b.y}, {-b.x, b.y, -b.z}, {-b.x, b.z, b.y}, {-b.z, b.x, -b.y}, {b.y, b.x, -b.z},
|
||||
{b.z, b.x, b.y}, {-b.y, b.x, b.z}, {b.z, -b.x, -b.y}, {b.y, -b.x, b.z}, {-b.z, -b.x, b.y},
|
||||
{-b.y, -b.x, -b.z}, {-b.y, -b.z, b.x}, {b.z, -b.y, b.x}, {b.y, b.z, b.x}, {-b.z, b.y, b.x},
|
||||
{b.z, b.y, -b.x}, {-b.y, b.z, -b.x}, {-b.z, -b.y, -b.x}, {b.y, -b.z, -b.x},
|
||||
}
|
||||
}
|
||||
|
||||
func (b beacon) String() string {
|
||||
return fmt.Sprintf("{%d,%d,%d}", b.x, b.y, b.z)
|
||||
}
|
||||
|
||||
type transformedScanner struct {
|
||||
beacons []beacon
|
||||
position beacon
|
||||
}
|
||||
192
2021/day19/structs.go.old.2
Normal file
192
2021/day19/structs.go.old.2
Normal file
@ -0,0 +1,192 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"sort"
|
||||
"strings"
|
||||
|
||||
h "git.bullercodeworks.com/brian/adventofcode/helpers"
|
||||
)
|
||||
|
||||
type Pair struct {
|
||||
a int
|
||||
b int
|
||||
}
|
||||
|
||||
type Translation struct {
|
||||
orig, foreign, rotID int
|
||||
}
|
||||
|
||||
type Triangle struct {
|
||||
a, b, c Beacon
|
||||
circumference, area int
|
||||
}
|
||||
|
||||
func NewTriangle(a, b, c Beacon) Triangle {
|
||||
t := Triangle{a: a, b: b, c: c}
|
||||
t.circumference = findCircumference(a, b, c)
|
||||
t.area = findArea(a, b, c)
|
||||
return t
|
||||
}
|
||||
|
||||
type Scanner struct {
|
||||
number int
|
||||
beacons []Beacon
|
||||
prints []Triangle
|
||||
}
|
||||
|
||||
func NewScannerFromInput(inp []string) (Scanner, error) {
|
||||
s := Scanner{}
|
||||
r := strings.NewReader(inp[0])
|
||||
_, err := fmt.Fscanf(r, "--- scanner %d ---", &s.number)
|
||||
if err != nil {
|
||||
return s, errors.New("No Scanner ID")
|
||||
}
|
||||
for _, v := range inp[1:] {
|
||||
r = strings.NewReader(v)
|
||||
b := Beacon{}
|
||||
_, err := fmt.Fscanf(r, "%d,%d,%d", &b.x, &b.y, &b.z)
|
||||
if err == nil {
|
||||
s.beacons = append(s.beacons, b)
|
||||
}
|
||||
}
|
||||
prints := make([]Triangle, 0, len(s.beacons))
|
||||
dupes := make(map[Pair]struct{})
|
||||
for _, b := range s.beacons {
|
||||
c1, c2 := b.findNearestTwo(s.beacons)
|
||||
t := NewTriangle(b, c1, c2)
|
||||
p := Pair{t.area, t.circumference}
|
||||
if _, ok := dupes[p]; !ok {
|
||||
prints = append(prints, t)
|
||||
}
|
||||
dupes[p] = struct{}{}
|
||||
}
|
||||
|
||||
return s, nil
|
||||
}
|
||||
|
||||
type Beacon struct {
|
||||
x, y, z int
|
||||
}
|
||||
|
||||
func (b Beacon) Add(c Beacon) Beacon {
|
||||
return Beacon{
|
||||
x: b.x + c.x,
|
||||
y: b.y + c.y,
|
||||
z: b.z + c.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) Sub(c Beacon) Beacon {
|
||||
return Beacon{
|
||||
x: b.x - c.x,
|
||||
y: b.y - c.y,
|
||||
z: b.z - c.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) Negate() Beacon {
|
||||
return Beacon{
|
||||
x: -b.x,
|
||||
y: -b.y,
|
||||
z: -b.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) Equals(c Beacon) bool {
|
||||
return b.x == c.x && b.y == c.y && b.z == c.z
|
||||
}
|
||||
|
||||
func (b Beacon) RotateX90() Beacon {
|
||||
return Beacon{
|
||||
x: b.x,
|
||||
y: -b.z,
|
||||
z: b.y,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) RotateY90() Beacon {
|
||||
return Beacon{
|
||||
x: -b.z,
|
||||
y: b.y,
|
||||
z: b.x,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) RotateZ90() Beacon {
|
||||
return Beacon{
|
||||
x: b.y,
|
||||
y: -b.x,
|
||||
z: b.z,
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) AllRotations() []Beacon {
|
||||
return []Beacon{
|
||||
{b.x, b.y, b.z},
|
||||
{b.x, -b.z, b.y},
|
||||
{b.x, -b.y, -b.z},
|
||||
{b.x, b.z, -b.y},
|
||||
{-b.x, -b.y, b.z},
|
||||
{-b.x, -b.z, -b.y},
|
||||
{-b.x, b.y, -b.z},
|
||||
{-b.x, b.z, b.y},
|
||||
{-b.z, b.x, -b.y},
|
||||
{b.y, b.x, -b.z},
|
||||
{b.z, b.x, b.y},
|
||||
{-b.y, b.x, b.z},
|
||||
{b.z, -b.x, -b.y},
|
||||
{b.y, -b.x, b.z},
|
||||
{-b.z, -b.x, b.y},
|
||||
{-b.y, -b.x, -b.z},
|
||||
{-b.y, -b.z, b.x},
|
||||
{b.z, -b.y, b.x},
|
||||
{b.y, b.z, b.x},
|
||||
{-b.z, b.y, b.x},
|
||||
{b.z, b.y, -b.x},
|
||||
{-b.y, b.z, -b.x},
|
||||
{-b.z, -b.y, -b.x},
|
||||
{b.y, -b.z, -b.x},
|
||||
}
|
||||
}
|
||||
|
||||
func (b Beacon) Rotate(rid int) Beacon {
|
||||
l := b.AllRotations()
|
||||
if rid < len(l) {
|
||||
return l[rid]
|
||||
}
|
||||
return b
|
||||
}
|
||||
|
||||
func (b Beacon) Distance(c Beacon) int {
|
||||
return h.Abs(b.x-c.x) + h.Abs(b.y-c.y) + h.Abs(b.z-c.z)
|
||||
}
|
||||
|
||||
func (b Beacon) findNearestTwo(list []Beacon) (Beacon, Beacon) {
|
||||
var distances []Pair
|
||||
for k, v := range list {
|
||||
if !b.Equals(v) {
|
||||
distances = append(distances, Pair{a: b.Distance(v), b: k})
|
||||
}
|
||||
}
|
||||
sort.Slice(distances, func(i, j int) bool { return distances[i].a < distances[j].a })
|
||||
return list[distances[0].b], list[distances[1].b]
|
||||
}
|
||||
|
||||
func findCircumference(a, b, c Beacon) int {
|
||||
return a.Distance(b) + b.Distance(c) + c.Distance(a)
|
||||
}
|
||||
|
||||
func findArea(a, b, c Beacon) int {
|
||||
wrk := crossProduct(b.Sub(a), c.Sub(a))
|
||||
return h.Abs(wrk.x) + h.Abs(wrk.y) + h.Abs(wrk.z)
|
||||
}
|
||||
|
||||
func crossProduct(a, b Beacon) Beacon {
|
||||
return Beacon{
|
||||
x: a.y*b.z - a.z*b.y,
|
||||
y: a.z*b.x - a.x*b.z,
|
||||
z: a.x*b.y - a.y*b.x,
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user