✨ Add day 12 part 1

2019-12-12 14:09:52 +01:00
parent 1273f4388b
commit 1ac5b20e1e
4 changed files with 301 additions and 0 deletions
--- a/day_12/functions.php
+++ b/day_12/functions.php
@@ -0,0 +1,66 @@
+<?php
+
+
+/**
+ * @param Moon[] $moons
+ */
+function calculateVelocity(array $moons)
+{
+    foreach ($moons as $i => $base_moon) {
+        foreach ($moons as $j => $target_moon) {
+            if ($i === $j) {
+                // same planet
+                continue;
+            }
+
+            $velocity_x = $base_moon->getVelocity()->getX();
+            $velocity_y = $base_moon->getVelocity()->getY();
+            $velocity_z = $base_moon->getVelocity()->getZ();
+            if ($base_moon->getX() > $target_moon->getX()) {
+                --$velocity_x;
+            } elseif ($base_moon->getX() < $target_moon->getX()) {
+                ++$velocity_x;
+            }
+            if ($base_moon->getY() > $target_moon->getY()) {
+                --$velocity_y;
+            } elseif ($base_moon->getY() < $target_moon->getY()) {
+                ++$velocity_y;
+            }
+            if ($base_moon->getZ() > $target_moon->getZ()) {
+                --$velocity_z;
+            } elseif ($base_moon->getZ() < $target_moon->getZ()) {
+                ++$velocity_z;
+            }
+            $base_moon->getVelocity()->setX($velocity_x)->setY($velocity_y)->setZ($velocity_z);
+        }
+    }
+}
+
+/**
+ * @param Moon[] $moons
+ */
+function updateCoordinates(array $moons)
+{
+    foreach ($moons as $moon) {
+        $moon->setX($moon->getX() + $moon->getVelocity()->getX());
+        $moon->setY($moon->getY() + $moon->getVelocity()->getY());
+        $moon->setZ($moon->getZ() + $moon->getVelocity()->getZ());
+    }
+}
+
+/**
+ * @param Moon[] $moons
+ * @return float|int
+ */
+function calculateEnergy(array $moons)
+{
+    $energy = 0;
+    foreach ($moons as $moon) {
+        $pot = abs($moon->getX()) + abs($moon->getY()) + abs($moon->getZ());
+        $velocity = $moon->getVelocity();
+        $kin = abs($velocity->getX()) + abs($velocity->getY()) + abs($velocity->getZ());
+        $energy += $pot * $kin;
+    }
+
+    return $energy;
+}