Implement day 8 2024 in Terraform

2024/bonus/day08/freq/main.tf

@@ -0,0 +1,52 @@
+variable "width" {
+  type = number
+}
+
+variable "height" {
+  type = number
+}
+
+variable "antennae" {
+  type = list(tuple([number, number]))
+}
+
+locals {
+  pairs = concat([
+    for i in range(length(var.antennae)) :
+    [
+      for j in range(i + 1, length(var.antennae)) : [var.antennae[i], var.antennae[j]]
+    ]
+  ]...)
+}
+
+module "pair" {
+  source = "./pair"
+  count  = length(local.pairs)
+
+  first  = local.pairs[count.index][0]
+  second = local.pairs[count.index][1]
+  width  = var.width
+  height = var.height
+}
+
+output "nodes1" {
+  value = setunion([
+    for i in range(length(local.pairs)) :
+    [
+      for v in module.pair[i].nodes1 :
+      v
+      if v[0] >= 0 && v[0] < var.width && v[1] >= 0 && v[1] < var.height
+    ]
+  ]...)
+}
+
+output "nodes2" {
+  value = setunion([
+    for i in range(length(local.pairs)) :
+    [
+      for v in module.pair[i].nodes2 :
+      v
+      if v[0] >= 0 && v[0] < var.width && v[1] >= 0 && v[1] < var.height
+    ]
+  ]...)
+}

2024/bonus/day08/freq/pair/main.tf

@@ -0,0 +1,34 @@
+variable "first" {
+  type = tuple([number, number])
+}
+
+variable "second" {
+  type = tuple([number, number])
+}
+
+variable "width" {
+  type = number
+}
+
+variable "height" {
+  type = number
+}
+
+locals {
+  dx = var.second[0] - var.first[0]
+  dy = var.second[1] - var.first[1]
+}
+
+output "nodes1" {
+  value = [
+    [var.first[0] - local.dx, var.first[1] - local.dy],
+    [var.second[0] + local.dx, var.second[1] + local.dy],
+  ]
+}
+
+output "nodes2" {
+  value = concat(
+    [for i in range(max(var.width, var.height)) : [var.first[0] - i * local.dx, var.first[1] - i * local.dy]],
+    [for i in range(max(var.width, var.height)) : [var.second[0] + i * local.dx, var.second[1] + i * local.dy]]
+  )
+}