Working version of train following spline path

drawing/circle.ts

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+import { Constants } from "../math/constants.ts";
+import { Vector } from "../math/vector.ts";
+
+const circle = (ctx: CanvasRenderingContext2D, center: Vector, radius: number) => {
+  ctx.beginPath();
+  ctx.arc(center.x, center.y, radius, 0, Constants.TWO_PI);
+}
+
+export const drawCircle = (ctx: CanvasRenderingContext2D, center: Vector, radius: number) => {
+  circle(ctx, center, radius);
+  ctx.stroke();
+}
+export const fillCircle = (ctx: CanvasRenderingContext2D, center: Vector, radius: number) => {
+  circle(ctx, center, radius);
+  ctx.fill();
+}

drawing/index.ts

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+export { drawCircle, fillCircle } from './circle.ts'

drawing/line.ts

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+export const drawLine = (ctx: CanvasRenderingContext2D, x1:number, y1:number, x2:number, y2: number) => {
+  ctx.beginPath();
+  ctx.moveTo(x1,y1);
+  ctx.lineTo(x2,y2);
+  ctx.stroke();
+}