Unity Editor Like CameraControl

DebugCameraControl.cs

using UnityEngine;

public class DebugCameraControl : MonoBehaviour {
	
#if UNITY_EDITOR
	private Vector3 oldPos;
	
	void Update() {
		
		if (Input.GetMouseButton(1)) {
			// 右クリック中にWASDでカメラ前後左右移動
			transform.position += transform.forward * Input.GetAxis("Vertical") / 30f;
			transform.position += transform.right * Input.GetAxis("Horizontal") / 30f;
			
			// 右クリック中にQEでカメラ上下移動
			float uppos = 0.0f;
			if (Input.GetKey(KeyCode.Q)) uppos = -0.01f;
			if (Input.GetKey(KeyCode.E)) uppos = 0.01f;
			transform.position += transform.up * uppos;
			
			// 右ドラッグでカメラ向き回転
			var diff = Input.mousePosition - oldPos;
			if (Mathf.Abs(diff.x) < 10f && Mathf.Abs(diff.y) < 10f) {	
				transform.RotateAround(Vector3.up, diff.x / 100f);
				transform.RotateAround(transform.right, -diff.y / 100f);
			}
			oldPos = Input.mousePosition;
		}
		
		// スクロールでカメラ前後移動
		transform.position += transform.forward * Input.GetAxis("Mouse ScrollWheel");
	}
#endif
	
}