From 572ab8a917f1d53f9fc115e17186d161f04ce1db Mon Sep 17 00:00:00 2001
From: Zakarya <zakaryacarroll.contact@gmail.com>
Date: Tue, 5 Sep 2023 20:17:56 -0700
Subject: [PATCH] initial commit

---
 engine.js | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 engine.js

diff --git a/engine.js b/engine.js
new file mode 100644
index 0000000..50f25da
--- /dev/null
+++ b/engine.js
@@ -0,0 +1,109 @@
+var nodes = new Set();
+var characters = new Set();
+
+
+class vector {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+  }
+  distance_to(other_vector) {
+    var distance = Math.sqrt((Math.pow(other_vector.x-this.x,2))+(Math.pow(other_vector.y-this.y,2)));
+    return distance;
+  }
+  rotation_to(other_vector) {
+    var rotation = Math.atan2((other_vector.y-this.y), (other_vector.x-this.x)) + (Math.PI * 0.5);
+    return rotation;
+  }
+  add(other_vector) {
+    this.x += other_vector.x;
+    this.y += other_vector.y;
+  }
+  rotate(rad) {
+    var cos = Math.cos(rad);
+    var sin = Math.sin(rad);
+    //this.x = Math.round(10000*(this.x*cos-this.y*sin))/10000;
+    //this.y = Math.round(10000*(this.x*sin+this.y*cos))/10000;
+    this.x = this.x*cos-this.y*sin;
+    this.y = this.x*sin+this.y*cos;
+  }
+}
+
+class node {
+  constructor(position, rotation, radius, size, type) {
+    this.position = position;
+    this.rotation = rotation;
+    this.radius = radius;
+    this.size = size;
+    this.type = type;
+
+    nodes.add(this);
+  }
+  translate(translate_vector) {
+    this.position.add(translate_vector);
+  }
+  destroy() {
+    nodes.delete(this);
+  }
+}
+
+class character {
+  constructor(position, rotation, variant, username, socket=null) {
+    this.position = position;
+    this.rotation = rotation;
+    this.radius = 40;
+    this.scale = 1;
+    this.variant = variant;
+    this.username = username;
+    this.socket = socket;
+    this.max_health = 100;
+    this.health = 100;
+    this.max_stamina = 100;
+    this.stamina = 100;
+
+    characters.add(this);
+  }
+  translate(translate_vector) {
+    this.position.add(translate_vector);
+  }
+  scale(scale) {
+    this.scale *= scale;
+  }
+  destroy() {
+    characters.delete(this);
+  }
+}
+
+function collide(object_1, object_2) { //object_2 gets moved
+  let min_distance = object_1.radius + object_2.radius;
+  if (object_1.position.distance_to(object_2.position) < min_distance) {
+    let move = object_1.position.distance_to(object_2.position) - min_distance;
+    if (object_1.position.x < object_2.position.x) {
+      object_2.position.x -= move;
+    }
+    else {
+      object_2.position.x += move;
+    }
+    if (object_1.position.y < object_2.position.y) {
+      object_2.position.y -= move;
+    }
+    else {
+      object_2.position.y += move;
+    }
+  }
+}
+
+function create_id() {
+	let ID = "";
+	let characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+	for (var i = 0; i < 12; i++) {
+		ID += characters.charAt(Math.floor(Math.random() * 36));
+	}
+	return ID;
+}
+
+if (typeof module === "undefined") {
+  var module = new Object();
+}
+
+module.exports = { create_id, collide, character, node, vector };