initial commit

resources/js/engine/Vector2D.js

@@ -0,0 +1,67 @@
+export class Vector2D {
+  constructor(x = 0, y = 0) {
+    this.x = x;
+    this.y = y;
+  }
+
+  mulS(scalar) {
+    return new Vector2D(this.x * scalar, this.y * scalar);
+  }
+
+  mulV(vector) {
+    return new Vector2D(this.x * vector.x, this.y * vector.y);
+  }
+
+  divS(scalar) {
+    return new Vector2D(this.x / scalar, this.y / scalar);
+  }
+
+  divV(vector) {
+    return new Vector2D(this.x / vector.x, this.y / vector.y);
+  }
+
+  addS(scalar) {
+    return new Vector2D(this.x + scalar, this.y + scalar);
+  }
+
+  addV(vector) {
+    return new Vector2D(this.x + vector.x, this.y + vector.y);
+  }
+
+  subS(scalar) {
+    return new Vector2D(this.x - scalar, this.y - scalar);
+  }
+
+  subV(vector) {
+    return new Vector2D(this.x - vector.x, this.y - vector.y);
+  }
+
+  dot(vector) {
+    return this.x * vector.x + this.y * vector.y;
+  }
+
+  abs() {
+    return new Vector2D(Math.abs(this.x), Math.abs(this.y));
+  }
+
+  length() {
+    return Math.sqrt(this.dot(this));
+  }
+
+  lengthSqrt() {
+    return this.dot(this);
+  }
+
+  normalize() {
+    const length = this.length();
+    this.x /= length;
+    this.y /= length;
+    return this;
+  }
+
+  rotate(angle) {
+    const cos = Math.cos(angle);
+    const sin = Math.sin(angle);
+    return new Vector2D(this.x * cos - this.y * sin, this.x * sin + this.y * cos);
+  }
+}