Question

JavaScript => public var didUpdateThisFrame: bool;
C# => public bool didUpdateThisFrame;

Description 描述

Did the video buffer update this frame?

视频缓存区是否更新此帧？

Use this to check if the video buffer has changed since the last frame. When setting a low frame rate, it is likely that the video updates slower then the game, so it does not make sense to do expensive video processing in each Update call, so check this value before doing any processing.

使用该属性检查最后帧后视频缓存区是否改变。当设置低帧率时，可能视频的更新慢于游戏，因此，在每次调用更新时它不可能做太多的场景处理，所以做任何处理之前检查该值。

JavaScript:

var webcamTexture : WebCamTexture;
	var data : Color32[];
 
	function Start () {
		// Start web cam feed
		webcamTexture = WebCamTexture();
		webcamTexture.Play();
		data = new Color32[webcamTexture.width * webcamTexture.height];
	}
 
	function Update () {
		if (webcamTexture.didUpdateThisFrame)
		{
			webcamTexture.GetPixels32 (data);
			// Do processing of data here.
		}
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public WebCamTexture webcamTexture;
    public Color32[] data;
    void Start() {
        webcamTexture = new WebCamTexture();
        webcamTexture.Play();
        data = new Color32[webcamTexture.width * webcamTexture.height];
    }
    void Update() {
        if (webcamTexture.didUpdateThisFrame)
            webcamTexture.GetPixels32(data);
 
    }
}

webcamtexture