From: Brendan Hansen <brendan.f.hansen@gmail.com>
Date: Sat, 12 Dec 2020 14:31:14 +0000 (-0600)
Subject: added day 12; updated day 11
X-Git-Url: https://git.brendanfh.com/?a=commitdiff_plain;h=e1f01889da014f1bac9a551a1ae53a22f100e6d2;p=onyx-aoc-2020.git

added day 12; updated day 11
---

diff --git a/day11.onyx b/day11.onyx
index b637a5c..2e178ed 100644
--- a/day11.onyx
+++ b/day11.onyx
@@ -17,11 +17,6 @@ gos_get_seat :: proc (use gos: ^GameOfSeats, x: i32, y: i32) -> SeatState {
     return seats[x + y * width];
 }
 
-gos_set_temp :: proc (use gos: ^GameOfSeats, x: i32, y: i32, state: SeatState) {
-    if x < 0 || y < 0 || x >= width || y >= height do return;
-    temp[x + y * width] = state;
-}
-
 gos_neighbors :: proc (use gos: ^GameOfSeats, x: i32, y: i32, state := SeatState.Occupied) -> u32 {
     count := 0;
 
@@ -53,12 +48,12 @@ gos_iter :: proc (use gos: ^GameOfSeats) -> bool {
 
             switch gos_get_seat(gos, x, y) {
                 case SeatState.Empty do if occ_neighbors == 0 {
-                    gos_set_temp(gos, x, y, SeatState.Occupied);
+                    temp[x + y * width] = SeatState.Occupied;
                     changed = true;
                 }
 
                 case SeatState.Occupied do if occ_neighbors >= 5 {
-                    gos_set_temp(gos, x, y, SeatState.Empty);
+                    temp[x + y * width] = SeatState.Empty;
                     changed = true;
                 }
             }
diff --git a/day12.onyx b/day12.onyx
new file mode 100644
index 0000000..338d11f
--- /dev/null
+++ b/day12.onyx
@@ -0,0 +1,72 @@
+#include_file "core/std/wasi"
+
+use package core
+use package core.string.reader as reader
+
+Ship :: struct {
+    x : i32 = 0;
+    y : i32 = 0;
+
+    fx : i32 = 1;
+    fy : i32 = 0;
+}
+
+rotate_left :: proc (ship: ^Ship) {
+    ofx := ship.fx;
+    ofy := ship.fy;
+
+    ship.fx = ofy;
+    ship.fy = -ofx;
+}
+
+rotate_right :: proc (ship: ^Ship) {
+    ofx := ship.fx;
+    ofy := ship.fy;
+
+    ship.fx = -ofy;
+    ship.fy = ofx;
+}
+
+turn_around :: proc (ship: ^Ship) {
+    ship.fx = -ship.fx;
+    ship.fy = -ship.fy;
+}
+
+main :: proc (args: [] cstr) {
+    contents := file.get_contents("input/day12.txt");
+    defer cfree(contents.data);
+
+    file := reader.make(contents);
+
+    ship := Ship.{ fx = 10, fy = -1 };
+    while !reader.empty(^file) {
+        dir := reader.read_byte(^file);
+        val := reader.read_u32(^file);
+        reader.advance_line(^file); 
+        
+        switch dir {
+            case #char "N" do ship.fy -= val;
+            case #char "E" do ship.fx += val;
+            case #char "S" do ship.fy += val;
+            case #char "W" do ship.fx -= val;
+            case #char "F" {
+                ship.x += ship.fx * val;
+                ship.y += ship.fy * val;
+            }
+
+            case #char "L" do switch val {
+                case 90 do rotate_left(^ship);
+                case 180 do turn_around(^ship);
+                case 270 do rotate_right(^ship);
+            }
+
+            case #char "R" do switch val {
+                case 90 do rotate_right(^ship);
+                case 180 do turn_around(^ship);
+                case 270 do rotate_left(^ship);
+            }
+        }
+    }
+
+    printf("Ship distance: %i\n", math.abs(ship.x) + math.abs(ship.y));
+}
diff --git a/input/day12.txt b/input/day12.txt
new file mode 100644
index 0000000..dc64185
--- /dev/null
+++ b/input/day12.txt
@@ -0,0 +1,750 @@
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diff --git a/out.wasm b/out.wasm
index 06c3250..b6a979a 100644
Binary files a/out.wasm and b/out.wasm differ