survivors: adding first version

absurd-survivors/src/utils.ts

@@ -0,0 +1,18 @@
+import {Vector} from "./base.ts";
+
+export function drawDot(position: Vector, size: number, color: string, ctx: CanvasRenderingContext2D) {
+    ctx.beginPath();
+    ctx.fillStyle = color;
+    ctx.arc(position.x, position.y, size, 0, 2 * Math.PI);
+    ctx.fill();
+}
+
+export function moveInDirectionOf(position: Vector, target: Vector, speedFactor): Vector {
+    let playerVector = Vector.createVector(target, position);
+    let direction = playerVector.normalize()
+    return position.add(direction.multiply(speedFactor))
+}
+
+export function straightMove(position: Vector, speed: Vector): Vector {
+    return position.add(speed)
+}