1 files changed, 9 insertions, 1 deletions
diff --git a/engine/components/Velocity.ts b/engine/components/Velocity.ts
index 119427d..068d8cd 100644
--- a/engine/components/Velocity.ts
+++ b/engine/components/Velocity.ts
@@ -6,10 +6,18 @@ export class Velocity extends Component {
   public dCartesian: Velocity2D;
   public dTheta: number;
 
-  constructor(dCartesian: Velocity2D, dTheta: number) {
+  constructor(dCartesian: Velocity2D = { dx: 0, dy: 0 }, dTheta: number = 0) {
     super(ComponentNames.Velocity);
 
     this.dCartesian = dCartesian;
     this.dTheta = dTheta;
   }
+
+  public add(velocity?: Velocity) {
+    if (velocity) {
+      this.dCartesian.dx += velocity.dCartesian.dx;
+      this.dCartesian.dy += velocity.dCartesian.dy;
+      this.dTheta += velocity.dTheta;
+    }
+  }
 }