How can I Made Smooth Transition of the Object

Hi All

I am new bie to Unity . In my project i have to do when i click the arrow key the object should move to certain distance and come back to the same position. I have a code for that.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class NewBehaviourScript : MonoBehaviour {
5.  
6.     // Use this for initialization
7.     public int speed=20;
8.     void Start () {
9.  
10.     }
11.  
12.     // Update is called once per frame
13.     void Update()
14.     {
15.        }
16.  
17.         if (Input.GetKeyDown(KeyCode.LeftArrow))
18.         {
19.             transform.position += Vector3.right * -speed * Time.deltaTime;
20.         }
21.         if (Input.GetKeyUp(KeyCode.LeftArrow))
22.         {
23.             transform.position += Vector3.right * speed * Time.deltaTime;
24.         }
25.      
26. }

But the object goes fast and comes soon.But i want smooth transition. In forums i have found can use Lerp. But no examples. Could any one can help me .How can i do it.

 

Take a look over this: http://answers.unity3d.com/questions/192438/coroutines-and-lerp-how-to-make-them-friends.html
Maybe it will help you. There is both c# and JavaScript example

 

check out MoveTowards and the example they provide: http://docs.unity3d.com/ScriptReference/Vector3.MoveTowards.html

 

Hi All Thanks troyfury and Cloud Kid for your reply. I have found a solution for smooth transition of an object.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class NewBehaviourScript : MonoBehaviour
5. {
6.  
7. Vector3 startPos;
8.  
9.     public float amplitude = 10f;
10.     public float period = 5f;
11.  
12.     protected void Start()
13.     {
14.         startPos = transform.position;
15.     }
16.  
17.     protected void Update()
18.     {
19.         float theta = Time.timeSinceLevelLoad / period;
20.         float distance = amplitude * Mathf.Sin(theta);      
21.         transform.position = startPos + Vector3.left * distance;
22.     }
23.  
24.  
25. }

The object is going and coming back to the same position. But I have another problem. In my project i dont want use Mathf.Sin(theta) function. I have to change the code.Could any one can help me..What else i should code instead of
float distance = amplitude * Mathf.Sin(theta); or any other code also welcome. The object should go smoothly and should come back to same position. Thanks in Advance.

 

Hi All I have found an Solution.I have attached the Code

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class NewBehaviourScript4 : MonoBehaviour
5. {
6.  
7.  
8.  
9.     float m_distanceTraveled = 0f;
10.     void Update()
11.     {
12.  
13.         if (Input.GetKeyDown("right"))
14.         {
15.             StartCoroutine(DoScaleThing());
16.         }
17.         if (Input.GetKeyDown("left"))
18.             StartCoroutine(DoScaleThing1());
19.         if (Input.GetKeyDown("down"))
20.             StartCoroutine(DoScaleThing2());
21.         if (Input.GetKeyDown("up"))
22.             StartCoroutine(DoScaleThing3());
23.  
24.     }
25.  
26.     public IEnumerator DoScaleThing()
27.     {
28.         while (m_distanceTraveled < 4f)
29.         {
30.             Vector3 oldPosition = transform.position;
31.             transform.Translate(Vector3.right * Time.deltaTime);
32.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
33.             yield return null;
34.         }
35.         while (m_distanceTraveled > 4f && m_distanceTraveled < 8f)
36.         {
37.             Vector3 oldPosition = transform.position;
38.             transform.Translate(Vector3.right * Time.deltaTime * -1);
39.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
40.             yield return null;
41.         }
42.  
43.     }
44.     public IEnumerator DoScaleThing1()
45.     {
46.         while (m_distanceTraveled < 4f)
47.         {
48.             Vector3 oldPosition = transform.position;
49.             transform.Translate(Vector3.left * Time.deltaTime);
50.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
51.             yield return null;
52.         }
53.         while (m_distanceTraveled > 4f && m_distanceTraveled < 8f)
54.         {
55.             Vector3 oldPosition = transform.position;
56.             transform.Translate(Vector3.left * Time.deltaTime * -1);
57.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
58.             yield return null;
59.         }
60.  
61.     }
62.     public IEnumerator DoScaleThing2()
63.     {
64.         while (m_distanceTraveled < 4f)
65.         {
66.             Vector3 oldPosition = transform.position;
67.             transform.Translate(Vector3.back * Time.deltaTime);
68.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
69.             yield return null;
70.         }
71.         while (m_distanceTraveled > 4f && m_distanceTraveled < 8f)
72.         {
73.             Vector3 oldPosition = transform.position;
74.             transform.Translate(Vector3.back * Time.deltaTime * -1);
75.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
76.             yield return null;
77.         }
78.  
79.     }
80.     public IEnumerator DoScaleThing3()
81.     {
82.         while (m_distanceTraveled < 4f)
83.         {
84.             Vector3 oldPosition = transform.position;
85.             transform.Translate(Vector3.forward * Time.deltaTime);
86.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
87.             yield return null;
88.         }
89.         while (m_distanceTraveled > 4f && m_distanceTraveled < 8f)
90.         {
91.             Vector3 oldPosition = transform.position;
92.             transform.Translate(Vector3.forward * Time.deltaTime * -1);
93.             m_distanceTraveled += Vector3.Distance(oldPosition, transform.position);
94.             yield return null;
95.         }
96.  
97.     }
98.  
99. }

When i clicked the four arrow key the object going smoothly going and coming soon.

But I have another problem. Once i run the code . I can able to click only once.(for eg . In out of 4 keys if i click right arrow the object going right and come back.but after that i click any key it does not work).It Strucks.
Once again i have to run the project . I have to avoid it.
In my project i need Each and every time if i click any arrow key. the object should go and come soon.
It should not struck after the first time . In my code I can run only Once in myproject. What i have to change the code for getting output. Each and Every Time i click any keys the object should go and come smoothly...

 

Hi all Any idea of why there is strucking. In my above code i can able to click only once. After that once again i have to run the project. I dont know whats wrong in the code. Could any one help me.

ANY OTHER CODE ALSO WELCOME. IF I CLICK ARROW KEY ONLY ONCE. THE OBJECT SHOULD GO FRONT (few distance upto 4f) and should come back to the original position.