day 9

year25/day9/part2_mask.go

@@ -1,136 +0,0 @@
-package day9
-
-//)
-//
-//func Part2BF(ctx aoc.Context) (int, error) {
-//	g, err := geometry.ScannerToGrid(ctx.Scanner(), ",", strconv.Atoi)
-//	if err != nil {
-//		return 0, fmt.Errorf("day9: failed to parse intput %w", err)
-//	}
-//	points := geometry.UnsafeGridData(g)
-//
-//	//data := g.Data()
-//	//
-//	//minx, miny := math.MaxInt, math.MaxInt
-//	//for i := range g.Rows() {
-//	//	minx = min(data[i][0], minx)
-//	//	miny = min(data[i][1], miny)
-//	//}
-//	//for i := range g.Rows() {
-//	//	data[i][0] -= minx
-//	//	data[i][1] -= miny
-//	//	if data[i][1] == 0 {
-//	//		fmt.Println()
-//	//	}
-//	//}
-//	//g = geometry.GridFrom(data)
-//
-//	bottomRight := []int{0, 0}
-//	for _, p := range points {
-//		bottomRight[colIndex] = max(bottomRight[colIndex], p[colIndex])
-//		bottomRight[lineIndex] = max(bottomRight[lineIndex], p[lineIndex])
-//	}
-//	bottomRight[colIndex] += 3
-//	bottomRight[lineIndex] += 2
-//
-//	mask := geometry.NewGrid[byte](bottomRight[lineIndex], bottomRight[colIndex])
-//	//data := geometry.UnsafeGridData(mask)
-//	//for i := 0; i < mask.Rows(); i++ {
-//	//	for j := 0; j < mask.Cols(); j++ {
-//	//		data[i][j] = dot
-//	//	}
-//	//}
-//	//mask.Fill(dot)
-//	for _, point := range points {
-//		p := geometry.NewPoint(point[lineIndex], point[colIndex])
-//		mask.Set(p, '#')
-//	}
-//
-//	fillGrid := func(mask geometry.Grid[byte], start, end []int) {
-//		a := geometry.NewPoint(start[lineIndex], start[colIndex]).ToDirectional(0)
-//		b := geometry.NewPoint(end[lineIndex], end[colIndex]).ToDirectional(0)
-//
-//		var d geometry.Direction
-//		if a.GetLine() == b.GetLine() {
-//			if a.GetCol() < b.GetCol() {
-//				d = geometry.DirectionRight
-//			} else {
-//				d = geometry.DirectionLeft
-//			}
-//		} else {
-//			if a.GetLine() < b.GetLine() {
-//				d = geometry.DirectionDown
-//			} else {
-//				d = geometry.DirectionUp
-//			}
-//		}
-//		a = a.SetDirection(d)
-//		b = b.SetDirection(d).MoveBackward()
-//
-//		for a != b {
-//			a = a.MoveForward()
-//			mask.Set(a, 'X')
-//		}
-//	}
-//
-//	var prev = points[len(points)-1]
-//	for i := 0; i < len(points); i++ {
-//		next := points[i]
-//		if prev[colIndex] == next[colIndex] || prev[lineIndex] == next[lineIndex] {
-//			fillGrid(mask, prev, next)
-//		} else {
-//			panic("day9: points out of range")
-//		}
-//		prev = next
-//	}
-//
-//	stack := dsa.NewStack[geometry.Point]()
-//	for i, line := range geometry.UnsafeGridData(mask) {
-//		walls := 0
-//		for j, point := range line {
-//			if point == 'X' || point == '#' {
-//				walls += 1
-//			}
-//			if point == dot && walls == 1 {
-//				stack.Push(geometry.NewPoint(i, j))
-//				break
-//			}
-//		}
-//		if !stack.IsEmpty() {
-//			break
-//		}
-//	}
-//	for !stack.IsEmpty() {
-//		p := stack.Pop()
-//		if mask.At(p) == dot {
-//			mask.Set(p, 'Y')
-//			stack.Push(p.MoveUp())
-//			stack.Push(p.MoveLeft())
-//			stack.Push(p.MoveRight())
-//			stack.Push(p.MoveDown())
-//		}
-//	}
-//
-//	for _, pair := range day9FindRectangles(points) {
-//		p1 := points[pair.Point1]
-//		p2 := points[pair.Point2]
-//
-//		start := geometry.NewPoint(min(p1[lineIndex], p2[lineIndex]), min(p1[colIndex], p2[colIndex]))
-//		end := geometry.NewPoint(max(p1[lineIndex], p2[lineIndex]), max(p1[colIndex], p2[colIndex]))
-//
-//		for i := start.Line; i <= end.Line; i++ {
-//			for j := start.Col; j <= end.Col; j++ {
-//				p := geometry.NewPoint(i, j)
-//				old := mask.At(p)
-//				mask.Set(p, '*')
-//				mask.Set(p, old)
-//				if mask.At(p) == dot {
-//					goto skip
-//				}
-//			}
-//		}
-//		return int(pair.Area), nil
-//	skip:
-//	}
-//	panic("day9: no solution found")
-//}