let dt = 0;
let oldTime = 0;

export function clearScreen(ctx, color) {
    ctx.fillStyle = color;
    ctx.fillRect(0, 0, ctx.canvas.clientWidth, ctx.canvas.clientHeight);
}

export function random(min, max) {
    return Math.floor(Math.random() * (max - min)) + min;
}

export function getDeltaTime(time) {
    dt = time - oldTime;
    oldTime = time;

    if (dt != 0) {
        dt = dt * 0.001;
    }

    return dt;
}