Cad.Net视口代码

你要注意的是我写参数的顺序,因为我试过参数弄乱了,反而多边形视口出问题了
【贵妃】[c#lisp]惊惊(540762622) 17:40:17
视口的构造继承了Entity,允许用户坐标系….

【贵妃】[c#lisp]惊惊(540762622) 17:41:10
而用户坐标系可以重新定义视口的原点,重新定义视口的原点之后,视点就会发生根据用户原点来计算可视位置

【贵妃】[c#lisp]惊惊(540762622) 17:41:52
不知道我说明白了没有,我第一次摸索的时候感觉有点复杂

【群主】Lisp#小轩轩(515357067) 17:43:13
也就是说你new 视口对象时候直接指定ucs原点，然后视口对象是跟着UCS走的

【贵妃】[c#lisp]惊惊(540762622) 17:43:14

/// <summary>
/// 保存视口信息的类型
/// </summary>
public struct StructViewport
{
    public Point3d ViewTarget { get; set; }
    public Point2d ViewCenter { get; set; }
    public double ViewHeight { get; set; }
    public double ViewWidth { get; set; }
    public Color ViewColor { get; set; }
    public string ViewLayerName { get; set; }
    public double ViewCustomScale { get; set; }
    public string ViewLineType { get; set; }
    public double ViewLineTypeScale { get; set; }
    public Vector3d ViewDirection { get; set; }
    public Point3d ViewCenterPoint { get; set; }
    public string[] ViewLayerNames { get; set; }
    public double ViewTwistAngle { get; set; }
    public bool ViewSnapmode { get; set; }
    public Entity Entity { get; set; }
    /// <summary>
    /// 生成视口的必须元素
    /// </summary>
    /// <param name="centerPoint">视口中点</param>
    /// <param name="width">视口宽</param>
    /// <param name="height">视口高</param>
    /// <param name="target">视口原点</param>
    /// <param name="center">视点中心</param>
    /// <param name="color">视口颜色</param>
    /// <param name="layerName">视口图层名字</param>  
    /// <param name="lineTypeName">视口线型名称</param>  
    /// <param name="lineTypeScale">视口线型比例</param>  
    /// <param name="customScale">视口比例</param>    
    /// <param name="direction">视图方向</param>    
    /// <param name="layerNames">视口冻结的图层名称</param>
    /// <param name="twistAngle">视口角度</param>
    /// <param name="snapmode">视口捕捉</param>  
    /// <param name="entity">克隆的图元</param>
    public StructViewport(Point3d centerPoint, double width, double height, Point3d target, Point2d center,
                          Color color, string layerName, string lineTypeName, double lineTypeScale,
                          double customScale, Vector3d direction,
                          string[] layerNames, double twistAngle, bool snapmode,
                          Entity entity = null)
    {
        ViewCenterPoint = centerPoint;
        ViewHeight = height;
        ViewWidth = width;
        ViewTarget = target;
        ViewCenter = center;
        ViewColor = color;
        ViewLayerName = layerName;
        ViewLineType = lineTypeName;
        ViewLineTypeScale = lineTypeScale;
        ViewCustomScale = customScale;
        ViewDirection = direction;
        ViewLayerNames = layerNames;
        ViewTwistAngle = twistAngle;
        ViewSnapmode = snapmode;
        Entity = entity;
    }
}

/// <summary>
/// 创建视口
/// </summary>
/// <param name="db">数据库</param>
/// <param name="vpa">保存视口的信息</param>
/// <returns></returns>
///  https://www.keanw.com/2009/12/creating-non-rectangular-paperspace-viewports-in-autocad-using-net.html
public static ObjectId AddViewportToMsPs(this Database db, StructViewport vpa)
{
    ObjectId id = ObjectId.Null;
    using (Transaction tr = db.TransactionManager.StartTransaction())
    {
        //当前图纸生成一遍需要冻结的图层之后,再获取这些名字相同的图层id
        var ids = new ObjectIdCollection();
        var lay = tr.GetObject(db.LayerTableId, OpenMode.ForRead) as LayerTable;
        foreach (var item in vpa.ViewLayerNames)
        {
            var layRec = tr.GetObject(lay[item], OpenMode.ForRead) as LayerTableRecord;
            ids.Add(layRec.ObjectId);
        }
        //创建视口
        Viewport vp = new Viewport();
        id = tr.AddEntityToMsPs(db, vp); //加入数据库
        //如果是多边形视口,那么就通过点表新建多段线  
        if (vpa.Entity != null)
        {
            var ent = vpa.Entity.Clone() as Entity; //重复执行要克隆一次,以保证有个母本不提交状态
            ent.Layer = vpa.ViewLayerName;  //图层
            ent.Color = vpa.ViewColor;      //颜色
            ent.Linetype = vpa.ViewLineType;//线型名称
            ent.LinetypeScale = vpa.ViewLineTypeScale;//线型比例  
            vp.NonRectClipEntityId = tr.AddEntityToMsPs(db, ent);//多边形线
            vp.NonRectClipOn = true;//不受约束的,多边形视口所需  
        }
        vp.On = true;//激活视口
        vp.Locked = false;//视口锁定
        {
            vp.Width = vpa.ViewWidth;   //视口宽度
            vp.Height = vpa.ViewHeight; //视口高度  
            vp.CenterPoint = vpa.ViewCenterPoint;//插入点
            vp.ViewTarget = vpa.ViewTarget; //视口原点
            vp.ViewCenter = vpa.ViewCenter; //视口中心
            vp.ViewDirection = vpa.ViewDirection;//观察方向
            vp.CustomScale = vpa.ViewCustomScale;//视口比例  
            vp.FreezeLayersInViewport(ids.GetEnumerator()); //冻结视口内图层
            vp.TwistAngle = vpa.ViewTwistAngle;//视口角度
            vp.SnapOn = vpa.ViewSnapmode;   //视口捕捉
            vp.Layer = vpa.ViewLayerName;   //图层
            vp.Color = vpa.ViewColor;       //颜色
            vp.Linetype = vpa.ViewLineType; //线型名称
            vp.LinetypeScale = vpa.ViewLineTypeScale;//线型比例
        }
        vp.Locked = true;//视口锁定
        tr.Commit();
    }
    return id;
}