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Question by
Maryoomi · May 01, 2015 at 04:08 AM ·
c#unity5positioninginstantiationrandomspawning
How to Spawn and Place an Object in Line after Spawned Randomized Object?
I am working on a 2D game which first spawns a number of objects in different positions randomly. What I am trying to do additionally is to spawn an object right after the position of the last clone of randomized objects according to the X axis. I have made many attempts to do that and all attempts failed.
Here is the script I am using with comments on each code:
using UnityEngine;
using System;
using System.Collections.Generic; //Allows us to use Lists.
using Random = UnityEngine.Random; //Tells Random to use the Unity Engine random number generator.
namespace Completed
{
public class BoardManager : MonoBehaviour
{
// Using Serializable allows us to embed a class with sub properties in the inspector.
[Serializable]
public class Count
{
public int minimum; //Minimum value for our Count class.
public int maximum; //Maximum value for our Count class.
//Assignment constructor.
public Count (int min, int max)
{
minimum = min;
maximum = max;
}
}
public int columns = 7; //Number of columns in our game board.
public Count random1Count = new Count (1, 2); //Lower and upper limit for our random number of objects
public Count random2Count = new Count (1, 1);
public Count random3Count = new Count (1, 1);
public Count random4Count = new Count (1, 1);
public GameObject[] randomObject1; //Array of objects prefabs.
public GameObject[] randomObject2;
public GameObject[] randomObject3;
public GameObject[] randomObject4;
public GameObject obj; // the independent object declaration
private List <Vector3> gridPositions = new List <Vector3> (); //A list of possible locations to place objects.
//Clears our list gridPositions and prepares it to generate a new board.
void InitialiseList ()
{
//Clear our list gridPositions.
gridPositions.Clear ();
//Loop through x axis (columns).
for(int x = 2; x < columns; x++)
{
//At each index add a new Vector3 to our list with the x and y coordinates of that position.
gridPositions.Add (new Vector3(x, 0.3f, 0f));
Instantiate(obj); // my attempt to instantiate the separate object
Debug.Log(obj.transform.position.x); // my attempt to track the position of the separate object
}
}
//RandomPosition returns a random position from our list gridPositions.
Vector3 RandomPosition ()
{
//Declare an integer randomIndex, set it's value to a random number between 0 and the count of items in our List gridPositions.
int randomIndex = Random.Range (0, gridPositions.Count);
//Declare a variable of type Vector3 called randomPosition, set it's value to the entry at randomIndex from our List gridPositions.
Vector3 randomPosition = gridPositions[randomIndex];
//Remove the entry at randomIndex from the list so that it can't be re-used.
gridPositions.RemoveAt (randomIndex);
//Return the randomly selected Vector3 position.
return randomPosition;
}
//LayoutObjectAtRandom accepts an array of game objects to choose from along with a minimum and maximum range for the number of objects to create.
void LayoutObjectAtRandom (GameObject[] tileArray, int minimum, int maximum)
{
//Choose a random number of objects to instantiate within the minimum and maximum limits
int objectCount = Random.Range (minimum, maximum+1);
//Instantiate objects until the randomly chosen limit objectCount is reached
for(int i = 0; i < objectCount; i++)
{
//Choose a position for randomPosition by getting a random position from our list of available Vector3s stored in gridPosition
Vector3 randomPosition = RandomPosition();
//Choose a random tile from tileArray and assign it to tileChoice
GameObject tileChoice = tileArray[Random.Range (0, tileArray.Length)];
//Instantiate tileChoice at the position returned by RandomPosition with no change in rotation
Instantiate(tileChoice, randomPosition, Quaternion.identity);
}
}
//SetupScene initializes our level and calls the previous functions to lay out the game board
public void SetupScene (int level)
{
//Reset our list of gridpositions.
InitialiseList ();
//Instantiate a random number of objects based on minimum and maximum, at randomized positions.
LayoutObjectAtRandom (randomObject1, random1Count.minimum, random1Count.maximum);
LayoutObjectAtRandom (randomObject2, random2Count.minimum, random2Count.maximum);
LayoutObjectAtRandom (randomObject3, random3Count.minimum, random3Count.maximum);
LayoutObjectAtRandom (randomObject4, random4Count.minimum, random4Count.maximum);
}
}
}
Comment
If I am correct the problem is that you cannot get the position of the object you instatiated. To do that you need to store it to a variable. TRy this:
Gameobject go;
go = Instantiate (-prefab-,-position-,-rotation-) as GameObject;
then you can do go.transform.position
If this is not your problem then please be more specific ;)
Your answer
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