Time.frameCount 帧数

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	private static int lastRecalculation = -1;
	static void RecalculateValue() {
		if (typeof(lastRecalculation) == Time.frameCount)
			return;

		ProcessData.AndDoSomeCalculations();
	}
}

// Makes sure that RecalculateValue only performs
// some operations once per frame and no more.
//确保RecalculateValue每帧只执行一次某些操作
static private var lastRecalculation = -1;
static function RecalculateValue () {
	if (lastRecalculation == Time.frameCount)
		return;
	ProcessData.AndDoSomeCalculations();
}