空間の魔術師〜Unityで思うがままにデコるAR作ってみた〜

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.iOS;
using System.Collections;

public class TouchController : MonoBehaviour
{
    // 画面に出現させるオブジェクトを宣言
    public GameObject[] decoratePrefab;

    void CreateObj(Vector3 atPosition)
    {
        // ランダムにオブジェクトを生成する
        int number = Random.Range(0, decoratePrefab.Length);
        GameObject decorateObj = Instantiate(decoratePrefab[number], atPosition, Quaternion.identity);
        // 正面を向いたオブジェクトを出現させる
        decorateObj.transform.Rotate(0.0f, 180.0f, 0.0f, Space.World);
    }

    void Update()
    {
        if (Input.touchCount > 0 )
        {
            var touch = Input.GetTouch(0);
            if (touch.phase == TouchPhase.Began)
            {
                var screenPosition = Camera.main.ScreenToViewportPoint(touch.position);
                ARPoint point = new ARPoint
                {
                    x = screenPosition.x,
                    y = screenPosition.y
                };

                // スクリーンの座標をWorld座標に変換
                List<ARHitTestResult> hitResults = UnityARSessionNativeInterface.GetARSessionNativeInterface().HitTest(point, ARHitTestResultType.ARHitTestResultTypeFeaturePoint);
                if (hitResults.Count > 0)
                {
                    foreach (var hitResult in hitResults)
                    {
                        Vector3 position = UnityARMatrixOps.GetPosition(hitResult.worldTransform);
                        CreateObj(new Vector3(position.x, position.y, position.z));
                        break;
                    }
                }
            }
        }
    }
}