Unity截取RenderTexture某帧画面显示在Image上

Unity截取RenderTexture某帧画面显示在Image上

	public Camera cam;//挂载rendertexture的相机
    public Image im;//显示的image
    RenderTexture fullBodyRender;
    Texture2D fullBodyTex;
    Sprite s;
    private void Start()
    {
        fullBodyRender = cam.targetTexture;
    }
    void JieTu()
    {
        fullBodyTex = getTexture2d(fullBodyRender);
        //将Texture2D转成Sprite格式
        s = Sprite.Create(fullBodyTex, new Rect(0, 0, fullBodyTex.width, fullBodyTex.height), Vector2.zero);
        im.gameObject.SetActive(true);
        im.sprite = s;
    }

    public Texture2D getTexture2d(RenderTexture renderT)
    {
        if (renderT == null)
            return null;
        int width = renderT.width;
        int height = renderT.height;
        Texture2D tex2d = new Texture2D(width, height, TextureFormat.ARGB32, false);
        RenderTexture.active = renderT;
        tex2d.ReadPixels(new Rect(0, 0, width, height), 0, 0);
        tex2d.Apply();
        return tex2d;
    }