Hi,

I am trying to make a plain side scrolling spaceship shooter R-Type style (if someone doesn't know about this legend here is a youtube link: link text)

What this means is that : 1. camera is slowly moving from left to right (x axis in my case) 2. player cannot control camera movement 3. spaceship is constantly passively moving with the camera (he won't be "left behind") 4. spaceship has a freedom to actively move inside the camera viewport boundaries

So far i have made a simple script that tries to implement this behaviour but i am not very happy with it. Not happy at all.

The problem i am having is defining camera viewport boundaries. While i have been more or less successful in preventing it moving up or down off the screen (+-y axis in my case) i can still see some microbounciness of my ship, especially when trying to prevent it to move right off the screen (+x axis) where i needed to introduce a bounceRight variable to further compensate the bounciness (i am not smart enough to calculate the compensation so i used the trail and error method). Where i almost completely failed is to prevent it to move left of the screen (-x axis). Unless i define a really big bounceLeft variable, which launches my ship into bouncy frenzy...it simply floats of the screen.

Is there a better way to do this? Or can i somehow improve my script?

var speed : float = 6.0;
var cameraSpeed : float = 1.0;
var bounceRight : float = 1.0;
var bounceLeft : float = 1.0;


function Update() {
    //player movement
    var controller : CharacterController = GetComponent(CharacterController);
        moveDirection = Vector3(Input.GetAxis("Horizontal"),Input.GetAxis("Vertical"),0);
        moveDirection *= speed;
        moveDirection.x += cameraSpeed;
        controller.Move(moveDirection * Time.deltaTime);

    //camera movement
    Camera.main.transform.Translate(Vector3(cameraSpeed*Time.deltaTime,0,0));

    //viewport boundaries
        var viewPos = Camera.main.WorldToViewportPoint (transform.position);

        if( viewPos.x < 0 ) {
            controller.Move(Vector3(-moveDirection.x * bounceLeft * Time.deltaTime,0,0));
        }
        else if( viewPos.x > 1 ) {
            controller.Move(Vector3(-moveDirection.x * bounceRight * Time.deltaTime,0,0));

        }
        if( viewPos.y < 0 ) {
            controller.Move(Vector3(0,-moveDirection.y * Time.deltaTime,0));

        }
        else if( viewPos.y > 1 ) {
            controller.Move(Vector3(0,-moveDirection.y * Time.deltaTime,0));
        } 


}