2023 day 10

2023/10/part2/lib/lib.go

@@ -0,0 +1,84 @@
+
+package part2
+
+import (
+	"git.tristans.cloud/tristan/aoc/2023/10/part1/lib"
+	"fmt"
+)
+
+type Loop map[[2]int]bool
+
+func GetLoop(pipeMap []string) ( loop Loop ) {
+	x,y := part1.FindStart(pipeMap)
+	loop = Loop{{x,y}: true}
+	side,x,y := part1.FindFirst(pipeMap, x,y)
+	for pipeMap[y][x] != 'S' {
+		loop[[2]int{x,y}] = true
+		side,x,y = part1.FindNext(pipeMap, side, x,y)
+	}
+	return
+}
+
+func GetShapeOfS(pipeMap []string) () {
+	return 
+}
+
+const CLEAR = "\u001b[0;0m";
+const OUT_OF_LOOP = CLEAR;
+const ON_LOOP = "\u001b[0;31m";
+const IN_LOOP = "\u001b[0;33m";
+
+func GetVolume(pipeMap []string) int {
+	loop := GetLoop(pipeMap)
+	count := 0
+	for y,line := range pipeMap {
+		inLoop := false
+		onDownEdge := false
+		onUpEdge := false
+		for x,c := range line {
+			_,onLoop := loop[[2]int{x,y}]
+
+			if onLoop {
+				switch c {
+				case '|':
+					inLoop = !inLoop
+				case 'L':
+					onDownEdge = true
+				case 'F':
+					onUpEdge = true
+				case '7':
+					if onDownEdge {
+						onDownEdge = false
+						inLoop = !inLoop
+					} else if onUpEdge {
+						onUpEdge = false
+					}
+				case 'J':
+					if onUpEdge {
+						onUpEdge = false
+						inLoop = !inLoop
+					} else if onDownEdge {
+						onDownEdge = false
+					}
+
+				}
+
+			}
+			color := OUT_OF_LOOP
+			if onLoop {
+				color = ON_LOOP
+			}
+			if inLoop && !onLoop {
+				count++
+				color = IN_LOOP
+			}
+			if c == 'S' {
+				color = "\u001b[41;30m"
+			}
+			fmt.Printf("%v%c", color, c)
+		}
+		println(CLEAR)
+	}
+	return count
+}
+