// Animates the position in an arc between sunrise and sunset.
    
    var sunrise : Transform;
    var sunset : Transform;
    
    // Time to move from sunrise to sunset position, in seconds.
    var journeyTime = 1.0;
    
    // The time at which the animation started.
    private var startTime: float;
    
    
    function Start() {
        // Note the time at the start of the animation.
        startTime = Time.time;
    }
    
    
    function Update () {
        // The center of the arc
        var center = (sunrise.position + sunset.position) * 0.5;
        // move the center a bit downwards to make the arc vertical
        center -= Vector3(0,1,0);
    
        // Interpolate over the arc relative to center
        var riseRelCenter = sunrise.position - center;
        var setRelCenter = sunset.position - center;
        
        // The fraction of the animation that has happened so far is
        // equal to the elapsed time divided by the desired time for
        // the total journey.
        var fracComplete = (Time.time - startTime) / journeyTime;
        transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, fracComplete);
        transform.position += center;
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Transform sunrise;
    public Transform sunset;
    public float journeyTime = 1.0F;
    private float startTime;
    void Start() {
        startTime = Time.time;
    }
    void Update() {
        Vector3 center = (sunrise.position + sunset.position) * 0.5F;
        center -= new Vector3(0, 1, 0);
        Vector3 riseRelCenter = sunrise.position - center;
        Vector3 setRelCenter = sunset.position - center;
        float fracComplete = (Time.time - startTime) / journeyTime;
        transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, fracComplete);
        transform.position += center;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public sunrise as Transform

    public sunset as Transform

    public journeyTime as single = 1.0F

    private startTime as single

    def Start():
        startTime = Time.time

    def Update():
        center as Vector3 = ((sunrise.position + sunset.position) * 0.5F)
        center -= Vector3(0, 1, 0)
        riseRelCenter as Vector3 = (sunrise.position - center)
        setRelCenter as Vector3 = (sunset.position - center)
        fracComplete as single = ((Time.time - startTime) / journeyTime)
        transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, fracComplete)
        transform.position += center