PrefabとInstantiateの基本（2）効率的にBlockを並べる：「はじめてのUnity」のブロック崩しを改造しながら学ぶ ref: http://qiita.com/JunShimura/items/268d5a6ccce303999da8

BlockControl.cs

using UnityEngine;
using System.Collections;

public class BlockControl : MonoBehaviour {

    public Transform blockPrefab;

    // Use this for initialization
    void Start () {
        //配置する座標を設定
        Vector3 placePosition = new Vector3(-4,0,9);
        //配置する回転角を設定
        Quaternion q = new Quaternion();
        q= Quaternion.identity;
        //配置
        Instantiate(blockPrefab,placePosition,q);
    }

    // Update is called once per frame
    void Update () {

    }
}

BlockControl.cs(抜粋)

public class BlockControl : MonoBehaviour {

    public Transform blockPrefab;
    public Transform topWall;   //上の壁の参照を追加
    public int placeX;          ////横に並べる個数
    public int placeZ;          ////奥に並べる個数
    public float totalDepth;    ////奥に並べる座標

    // Use this for initialization
    void Start () {
        //配置する座標を設定
        Vector3 placePosition = new Vector3(
            topWall.position.x-topWall.localScale.x/2+blockPrefab.localScale.x/2,
            0,
            topWall.position.z-topWall.localScale.z/2-blockPrefab.localScale.z/2);

        //配置する回転角を設定
        Quaternion q = new Quaternion();
        q= Quaternion.identity;

        //幅と奥行きを調整
        Vector3 localscale = blockPrefab.localScale;
        localscale.x = topWall.localScale.x / placeX;
        localscale.z = totalDepth / placeZ;
        blockPrefab.localScale = localscale;

        //配置
        for (int i = 0; i < placeZ; i++)
        {
            Vector3 currentPlacePosition
                = placePosition
                - Vector3.forward * blockPrefab.localScale.z * i;
            for(int j = 0; j < placeX; j++)
            {
                Instantiate(blockPrefab, currentPlacePosition, q);
                currentPlacePosition.x += blockPrefab.transform.localScale.x;
            }
        }
    }

file1.cs

Vector3 placePosition = new Vector3(-4,0,9);

file10.txt

toWall.position.z-topWall.localscale.z/2

file11.txt

toWall.position.x-topWall.localscale.x/2-blockPrefab.localscale.x/2

file15.cs

        //幅を調整
        Vector3 localscale = blockPrefab.localScale;
        localscale.x = topWall.localScale.x / placeX;
        blockPrefab.localScale = localscale;

file17.cs

    public int placeZ;          ////奥に並べる個数
    public float totalDepth;    ////奥に並べる座標

file18.cs

        localscale.z = totalDepth / placeZ;

file19.cs

        //配置
        for (int i = 0; i < placeZ; i++)
        {
            Vector3 currentPlacePosition
                = placePosition
                - Vector3.forward * blockPrefab.localScale.z * i;
            for(int j = 0; j < placeX; j++)
            {
                Instantiate(blockPrefab, currentPlacePosition, q);
                currentPlacePosition.x += blockPrefab.transform.localScale.x;
            }
        }
    }

file2.cs

Quaternion q = new Quaternion();
q= Quaternion.identity;

file3.cs

Instantiate(blockPrefab,placePosition,q);

file8.txt

toWall.position.x-topWall.localscale.x/2

file9.txt

toWall.position.x-topWall.localscale.x/2+blockPrefab.localscale.x/2