let vehicle1;
let vehicle2;
let path;

function setup() {
    cursor(CROSS);
    createCanvas(600, 600);
    vehicle1 = new Vehicle(300, 300, "#CCCCCC");
    vehicle1.velocity = createVector(6, 0);
    vehicle2 = new Vehicle(300, 300, "#CC3333");
    vehicle2.velocity = randomVector(6);
    path = new Path(0, 300, 600, 300, 20);
}

function draw() {
    // 追逐鼠标();
    // 逃避鼠标();
    // 小车追逐();
    // 小车巡游();
    小车巡线();
    // 道路追逐();
}

function 追逐鼠标() {
    background(64);
    vehicle1.seek(createVector(mouseX, mouseY));
    vehicle1.move();
    vehicle1.turn();
    vehicle1.drawPath();
    vehicle1.show();
}

function 逃避鼠标() {
    background(64);
    vehicle1.flee(createVector(mouseX, mouseY));
    vehicle1.move();
    vehicle1.turn();
    vehicle1.drawPath();
    vehicle1.show();
}

function 小车追逐() {
    background(64);
    vehicle1.seek(vehicle2.position, 20);
    vehicle2.move();
    vehicle1.move();
    if (vehicle2.turn()) vehicle2.velocity = randomVector(random(2, 5));
    vehicle1.turn();
    vehicle1.drawPath();
    vehicle2.show("point");
    vehicle1.show();
}

function 小车巡游() {
    background(64);
    vehicle1.wander();
    vehicle1.move();
    vehicle1.turn();
    vehicle1.drawPath();
    vehicle1.show();
}

function 小车巡线() {
    background(0);
    path.end.y = mouseY;
    vehicle1.follow(path, 20);
    vehicle1.move();
    vehicle1.turn();
    path.show();
    vehicle1.drawPath();
    vehicle1.show();
}

/**
 * 未完成
 */
function 道路追逐() {
    background(0);
    // path.end.y = mouseY;
    vehicle2.follow(path, 50);
    vehicle1.seek(vehicle2.position, 100);
    vehicle2.flee(vehicle1.position, 100);

    vehicle2.move();
    vehicle1.move();
    vehicle2.turn();
    vehicle1.turn();
    path.show();
    vehicle2.drawPath();
    vehicle1.drawPath();
    vehicle2.show();
    vehicle1.show();
}