Adding PlayerMovement class to interpolate/extrapolate position along tests (installing Jasmine)

front/src/Phaser/Game/PlayerMovement.ts

@@ -0,0 +1,23 @@
+import {HasMovedEvent} from "./GameManager";
+import {MAX_EXTRAPOLATION_TIME} from "../../Enum/EnvironmentVariable";
+
+export class PlayerMovement {
+    public constructor(private startPosition: HasMovedEvent, private startTick: number, private endPosition: HasMovedEvent, private endTick: number) {
+    }
+
+    public isOutdated(tick: number): boolean {
+        return tick > this.endTick + MAX_EXTRAPOLATION_TIME;
+    }
+
+    public getPosition(tick: number): HasMovedEvent {
+        let x = (this.endPosition.x - this.startPosition.x) * ((tick - this.startTick) / (this.endTick - this.startTick)) + this.startPosition.x;
+        let y = (this.endPosition.y - this.startPosition.y) * ((tick - this.startTick) / (this.endTick - this.startTick)) + this.startPosition.y;
+
+        return {
+            x,
+            y,
+            direction: this.endPosition.direction,
+            moving: this.endPosition.moving
+        }
+    }
+}