MonoDevelop does not Accept List despite using Collections.Generic Namespace...

Hey Guys,

I am trying to use a very simple script:
http://www.theappguruz.com/blog/display-projectile-trajectory-path-in-unity

But Unity wont allow me to render the game cause it thinks there is no reference to List:
"Assets/Scripts/shooter.cs(18,17): error CS0246: The type or namespace name `List' could not be found. Are you missing a using directive or an assembly reference?"

But as you can see in the Source, there is already a namespace for that?!

Anyone an idea?

Thanks

 

You want to post the code here? The link is broken on mobile devices.

 

Sure:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4. public class CannonScript : MonoBehaviour
5. {
6. // TrajectoryPoint and Ball will be instantiated
7.     public GameObject TrajectoryPointPrefeb;
8.     public GameObject BallPrefb;
9.  
10.     private GameObject ball;
11.     private bool isPressed, isBallThrown;
12.     private float power = 25;
13.     private int numOfTrajectoryPoints = 30;
14.     private List trajectoryPoints;
15.     //---------------------------------------  
16.     void Start ()
17.     {
18.         trajectoryPoints = new List();
19.         isPressed = isBallThrown =false;
20. //   TrajectoryPoints are instatiated
21.         for(int i=0;i<numOfTrajectoryPoints;i++)
22.         {
23.             GameObject dot= (GameObject) Instantiate(TrajectoryPointPrefeb);
24.             dot.renderer.enabled = false;
25.             trajectoryPoints.Insert(i,dot);
26.         }
27.     }
28.     //---------------------------------------  
29.     void Update ()
30.     {
31.         if(isBallThrown)
32.             return;
33.         if(Input.GetMouseButtonDown(0))
34.         {
35.             isPressed = true;
36.             if(!ball)
37.                 createBall();
38.         }
39.         else if(Input.GetMouseButtonUp(0))
40.         {
41.             isPressed = false;
42.             if(!isBallThrown)
43.             {
44.                 throwBall();
45.             }
46.         }
47.     // when mouse button is pressed, cannon is rotated as per mouse movement and projectile trajectory path is displayed.
48.         if(isPressed)
49.         {
50.             Vector3 vel = GetForceFrom(ball.transform.position,Camera.main.ScreenToWorldPoint(Input.mousePosition));
51.             float angle = Mathf.Atan2(vel.y,vel.x)* Mathf.Rad2Deg;
52.             transform.eulerAngles = new Vector3(0,0,angle);
53.             setTrajectoryPoints(transform.position, vel/ball.rigidbody.mass);
54.         }
55.     }
56.     //---------------------------------------  
57.     // Following method creates new ball
58.     //---------------------------------------  
59.     private void createBall()
60.     {
61.         ball = (GameObject) Instantiate(BallPrefb);
62.         Vector3 pos = transform.position;
63.         pos.z=1;
64.         ball.transform.position = pos;
65.         ball.SetActive(false);
66.     }
67.     //---------------------------------------  
68. // Following method gives force to the ball
69.     //---------------------------------------  
70.     private void throwBall()
71.     {
72.         ball.SetActive(true);  
73.         ball.rigidbody.useGravity = true;
74.         ball.rigidbody.AddForce(GetForceFrom(ball.transform.position,Camera.main.ScreenToWorldPoint(Input.mousePosition)),ForceMode.Impulse);
75.         isBallThrown = true;
76.     }
77.     //---------------------------------------  
78. // Following method returns force by calculating distance between given two points
79.     //---------------------------------------  
80.     private Vector2 GetForceFrom(Vector3 fromPos, Vector3 toPos)
81.     {
82.         return (new Vector2(toPos.x, toPos.y) - new Vector2(fromPos.x, fromPos.y))*power;
83.     }
84.     //---------------------------------------  
85.     // Following method displays projectile trajectory path. It takes two arguments, start position of object(ball) and initial velocity of object(ball).
86.     //---------------------------------------  
87.     void setTrajectoryPoints(Vector3 pStartPosition , Vector3 pVelocity )
88.     {
89.         float velocity = Mathf.Sqrt((pVelocity.x * pVelocity.x) + (pVelocity.y * pVelocity.y));
90.         float angle = Mathf.Rad2Deg*(Mathf.Atan2(pVelocity.y , pVelocity.x));
91.         float fTime = 0;
92.      
93.         fTime += 0.1f;
94.         for (int i = 0 ; i < numOfTrajectoryPoints ; i++)
95.         {
96.             float dx = velocity * fTime * Mathf.Cos(angle * Mathf.Deg2Rad);
97.             float dy = velocity * fTime * Mathf.Sin(angle * Mathf.Deg2Rad) - (Physics2D.gravity.magnitude * fTime * fTime / 2.0f);
98.             Vector3 pos = new Vector3(pStartPosition.x + dx , pStartPosition.y + dy ,2);
99.             trajectoryPoints[i].transform.position = pos;
100.             trajectoryPoints[i].renderer.enabled = true;
101.             trajectoryPoints[i].transform.eulerAngles = new Vector3(0,0,Mathf.Atan2(pVelocity.y - (Physics.gravity.magnitude)*fTime,pVelocity.x)*Mathf.Rad2Deg);
102.             fTime += 0.1f;
103.         }
104.     }
105. }

Well, I am using to implement this code into mine (Without the functions) but it does not accept the List function...:

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4. using System.Collections.Generic;
5.  
6. public class shooter : MonoBehaviour {
7.  
8.  
9.     GameObject prefab;
10.  
11.     // TrajectoryPoint and Ball will be instantiated
12.     public GameObject TrajectoryPointPrefeb;
13.     public GameObject BallPrefb;
14.    
15.     private GameObject ball;
16.     private bool isPressed, isBallThrown;
17.     private float power = 25;
18.     private int numOfTrajectoryPoints = 30;
19.     private List trajectoryPoints;
20.     //---------------------------------------    
21.     public float timeBetwseenShots = 0.33f;  // Allow 3 shots per second
22.     private float timestamp;
23.  
24.  
25.     void Start () {
26.         prefab = Resources.Load ("barrel") as GameObject;
27.  
28.         trajectoryPoints = new List();
29.         isPressed = isBallThrown =false;
30.  
31.         //   TrajectoryPoints are instatiated
32.         for(int i=0;i<numOfTrajectoryPoints;i++)
33.         {
34.             GameObject dot = (GameObject) Instantiate(TrajectoryPointPrefeb);
35.             dot.GetComponent<Renderer>().enabled = false;
36.             trajectoryPoints.Insert(i,dot);
37.         }
38.     }
39.    
40.     // Update is called once per frame
41.     void Update () {
42.  
43.        
44.         if(isBallThrown)
45.             return;
46.         if(Input.GetMouseButtonDown(0)))
47.         {
48.             isPressed = true;
49.             if(!ball)
50.                 createBall();
51.         }
52.         else if(Input.GetMouseButtonUp(0))
53.         {
54.             isPressed = false;
55.             if(!isBallThrown)
56.             {
57.                 throwBall();
58.             }
59.         }
60.         // when mouse button is pressed, cannon is rotated as per mouse movement and projectile trajectory path is displayed.
61.         if(isPressed)
62.         {
63.             Vector3 vel = GetForceFrom(ball.transform.position,Camera.main.ScreenToWorldPoint(Input.mousePosition));
64.             float angle = Mathf.Atan2(vel.y,vel.x)* Mathf.Rad2Deg;
65.             transform.eulerAngles = new Vector3(0,0,angle);
66.             setTrajectoryPoints(transform.position, vel/ball.GetComponent<Rigidbody>().mass);
67.         }
68.  
69.  
70.  
71.     /*    if (Input.GetKey(KeyCode.Space) && Time.time >= timestamp && (Input.GetKeyDown(KeyCode.Space)))
72.         {
73.             GameObject barrel = Instantiate(prefab) as GameObject;
74.             barrel.transform.position = transform.position + Camera.main.transform.forward / 2;
75.             Rigidbody rb = barrel.GetComponent<Rigidbody>();
76.             rb.velocity = new Vector3(0,10,8);
77.             timestamp = Time.time + timeBetweenShots;
78.         } */
79.     }
80.  

 

Bug in the example code you're working with. Looks like it should be List<GameObject> and then in awake change new List(); to new List<GameObject>();

 

Thats it.. Thanks.. Did not see all the solutions in the forums when I was searching for one. I was sure it will work that way.