day8: solved puzzle 2

fxnn · fxnn · commit f28d50ea5ad9 · 2024-12-08T13:25:08.000+01:00
diff --git a/day8/example1.txt b/day8/example1.txt
diff --git a/day8/example2.txt b/day8/example2.txt
@@ -0,0 +1,10 @@
+T....#....
+...T......
+.T....#...
+.........#
+..#.......
+..........
+...#......
+..........
+....#.....
+..........
diff --git a/day8/main.go b/day8/main.go
@@ -38,14 +38,20 @@ func discoverAntinodes(antennaPoints map[byte][]util.Point, mapHeight int, mapWi
 				if i == j {
 					continue
 				}
+				antinodes[point] = util.Void{}
+				antinodes[otherPoint] = util.Void{}
 				var delta = point.Subtract(otherPoint)
+
 				var antinode1 = point.Add(delta)
-				if antinode1.IsInBounds(mapHeight, mapWidth) {
+				for antinode1.IsInBounds(mapHeight, mapWidth) {
 					antinodes[antinode1] = util.Void{}
+					antinode1 = antinode1.Add(delta)
 				}
+
 				var antinode2 = otherPoint.Subtract(delta)
-				if antinode2.IsInBounds(mapHeight, mapWidth) {
+				for antinode2.IsInBounds(mapHeight, mapWidth) {
 					antinodes[antinode2] = util.Void{}
+					antinode2 = antinode2.Subtract(delta)
 				}
 			}
 		}

Original file line number	Diff line number	Diff line change
`@@ -38,14 +38,20 @@ func discoverAntinodes(antennaPoints map[byte][]util.Point, mapHeight int, mapWi`
`38`	`38`	`if i == j {`
`39`	`39`	`continue`
`40`	`40`	`}`
	`41`	`+ antinodes[point] = util.Void{}`
	`42`	`+ antinodes[otherPoint] = util.Void{}`
`41`	`43`	`var delta = point.Subtract(otherPoint)`
	`44`	`+`
`42`	`45`	`var antinode1 = point.Add(delta)`
`43`		`- if antinode1.IsInBounds(mapHeight, mapWidth) {`
	`46`	`+ for antinode1.IsInBounds(mapHeight, mapWidth) {`
`44`	`47`	`antinodes[antinode1] = util.Void{}`
	`48`	`+ antinode1 = antinode1.Add(delta)`
`45`	`49`	`}`
	`50`	`+`
`46`	`51`	`var antinode2 = otherPoint.Subtract(delta)`
`47`		`- if antinode2.IsInBounds(mapHeight, mapWidth) {`
	`52`	`+ for antinode2.IsInBounds(mapHeight, mapWidth) {`
`48`	`53`	`antinodes[antinode2] = util.Void{}`
	`54`	`+ antinode2 = antinode2.Subtract(delta)`
`49`	`55`	`}`
`50`	`56`	`}`
`51`	`57`	`}`