How can i make the enemy go to the character position?

问题

What my game has is a character in a preset position in a 2d-game mobile(x=0.33, y=9.48, z=0). I have enemys that are spawn from different angles of the screen with a movement script. But i have to modify the script so it moves towards the character position always.

Tried to set the position of the enemy = with character position. but that doesnt work.

Anyone has any idea how can i do that?

here is the script:

///
//Speed - essential : true ?
let speed;
let enabled = false;
let phys;
function init() {
    speed =4;
//let d = Math.sqrt( Math.pow((enemy.x-playerPos.x), 2) + Math.pow((enemy.y-playerPos.y), 2) );


}
function update(dt) {
    dt = 1 / 60.0; // fixed delta time
    let enemy = this.entity().position();
    let player = this.scene().find('Actor')[0];
    let playerPos = player.worldPosition();
    let d = new Vec3(
                playerPos.x - enemy.x,
                playerPos.y - enemy.y,
                playerPos.z - enemy.z
            )

    const length = Math.sqrt(d.x * d.x + d.y * d.y);

    let dirTowardsPlayer = new Vec3 (
        d.x / length,
        d.y / length,
        d.z / length
    )

    this.entity().setPosition(
                dt * dirTowardsPlayer.x * speed,
                dt * dirTowardsPlayer.y * speed,
                dt * dirTowardsPlayer.z * speed);
    log(dirTowardsPlayer)

}
function signal(name, value) {
    enabled = value;
}

i am expecting the enemy to move towards the character preseted position

来源：https://stackoverflow.com/questions/58075898/how-can-i-make-the-enemy-go-to-the-character-position