[SOLVED] Moving instantiated object slowly up from under terrain

Unity Engine
1

Hello again
I have a new problem.
I want my “snail” to come up from the ground and then wander as usual. The code I have written now, is not working. The snail will only show up under the ground and then it stays there and wander under the ground.
What am I doing wrong?

void Update () {
        if (spawnedSnails < snailsInsideArea) {
            float posX, posY, posZ;
            posX = Random.Range(
                    (playerTransform.position.x - spawnRadius), 
                    (playerTransform.position.x + spawnRadius)
                    );
            posZ = Random.Range(
                    (playerTransform.position.z - spawnRadius), 
                    (playerTransform.position.z + spawnRadius)
                    );
            posY = Terrain.activeTerrain.SampleHeight(new Vector3(posX, 0, posZ));
            Vector3 position = new Vector3(
                posX, 
                posY -= 2, 
                posZ
                );
            Vector3 endPos = new Vector3(
                posX, 
                posY += 2, 
                posZ
                );
            Snail.GetComponent<Rigidbody>().useGravity = false;
            Instantiate(Snail, position, Quaternion.Euler(new Vector3(-90,0,0)));
            float i = 0.0f;
            Debug.Log(Snail.transform.position.y + " , " + posY);
            while (Snail.transform.position.y < posY) {
                i += Time.deltaTime * speed;
                Snail.transform.position = Vector3.Lerp(position, endPos, i);
//                Debug.Log(Snail.transform.position.y + " - " + posY);
            }
            Snail.GetComponent<Rigidbody>().useGravity = true;
            spawnedSnails++;
        }
    }
2

Ok, so I have now changed the code and now the snail is comming up from ground but when it is nearly up, it shoots up like its been shoot out of a cannon. !?

using UnityEngine;
using System.Collections;

public class PlaceRandomSnails : MonoBehaviour {

    [Header("Setup")]
    [SerializeField]
    [Range(1, 20)]
    private int snailsInsideArea = 5;

    [SerializeField]
    //[Range(100,200)]
    private float spawnRadius = 5.0f;

    [SerializeField]
    private Transform playerTransform;

    [SerializeField]
    [Range(1, 100)]
    private int aChanceOfXToSpawn = 1;

    [SerializeField]
    private GameObject Snail;

    private static int spawnedSnails = 0;


    private float speed = 0.01f;

    // Use this for initialization
    void Start() {

    }

    // Update is called once per frame
    void Update() {
        if (spawnedSnails < snailsInsideArea) {
            float posX, posY, posZ;
            posX = Random.Range(
                    (playerTransform.position.x - spawnRadius),
                    (playerTransform.position.x + spawnRadius)
                    );
            posZ = Random.Range(
                    (playerTransform.position.z - spawnRadius),
                    (playerTransform.position.z + spawnRadius)
                    );
            posY = Terrain.activeTerrain.SampleHeight(new Vector3(posX, 0, posZ));
            Vector3 position = new Vector3(
                posX,
                posY -= 1.5f,
                posZ
                );
            GameObject go = (GameObject) Instantiate(Snail, position, Quaternion.Euler(new Vector3(-90, 0, 0)));
            go.transform.GetComponent<Rigidbody>().useGravity = false;
            spawnedSnails++;
        }
    }
}

And then in every Snail:

using UnityEngine;
using System.Collections;

public class Snail01Controller : MonoBehaviour {

    [SerializeField]
    [Range(0.01f, 1.0f)]
    private float speedOfSnail = 0.01f;
    private float moveDistance = 0f;
    private float currentMoves = 0;
    private float currentPosition;
    private Vector3 currentDirection;


    private float posY;
    // Use this for initialization
    void Start () {
        moveDistance = Random.Range(100, 1000);
        currentDirection = new Vector3( Random.Range(-1.0f, 1.0f) , 0.0f, Random.Range(-1.0f, 1.0f) );
        posY = Terrain.activeTerrain.SampleHeight(new Vector3(this.transform.position.x, 0, this.transform.position.z));
    }

    // Update is called once per frame
    void Update () {
        if (this.transform.position.y >= posY) {
            this.transform.GetComponent<Rigidbody>().useGravity = true;
            Quaternion qTo = Quaternion.LookRotation(currentDirection);
            transform.rotation = Quaternion.Slerp(transform.rotation, qTo, speedOfSnail * Time.deltaTime);
            if (currentMoves < moveDistance) {
                transform.Translate(Vector3.down * speedOfSnail * Time.deltaTime);
                currentMoves++;
            }
            if (currentMoves >= moveDistance) {
                moveDistance = Random.Range(100, 1000);
                currentDirection = new Vector3(Random.Range(-1.0f, 1.0f), 0.0f, Random.Range(-1.0f, 1.0f));
                currentMoves = 0;
            }
        } else {
            // Om Snail inte är ovan mark
            transform.Translate(Vector3.forward * speedOfSnail * Time.deltaTime);
        }
    }
}
3

I have now made a little clip of what happens. Please take a look and see if you can help in any way.

4

I have figured it out!. I set collider to false as long as the collider is under the terrain. and when it gets ontop of terrain, it is set to true again. It works :slight_smile: