Unity基础之代码篇 —— 摄像机控制、物体控制、触发器、射线、导航代理等

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public class CameraController : MonoBehaviour {

	// store a public reference to the Player game object, so we can refer to it's Transform
	public GameObject player;

	// Store a Vector3 offset from the player (a distance to place the camera from the player at all times)
	private Vector3 offset;

	// At the start of the game..
	void Start ()
	{
		// Create an offset by subtracting the Camera's position from the player's position
		offset = transform.position - player.transform.position;
	}

	// After the standard 'Update()' loop runs, and just before each frame is rendered..
	void LateUpdate ()
	{
		// Set the position of the Camera (the game object this script is attached to)
		// to the player's position, plus the offset amount
		transform.position = player.transform.position + offset;
	}
}

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 public float smoothing = 5f;        // The speed with which the camera will be following.
        Vector3 offset;                     // The initial offset from the target.

        void Start ()
        {
            // Calculate the initial offset.
            offset = transform.position - target.position;
        }
        void FixedUpdate ()
        {
            // Create a postion the camera is aiming for based on the offset from the target.
            Vector3 targetCamPos = target.position + offset;

            // Smoothly interpolate between the camera's current position and it's target position.
            transform.position = Vector3.Lerp (transform.position, targetCamPos, smoothing * Time.deltaTime