Halcon WPF 开发学习笔记(4)：Halcon 锚点坐标打印

专栏

Halcon开发 博客专栏
WPF/HALCON机器视觉合集

前言

Halcon控件C#开发是我们必须掌握的，因为只是单纯的引用脚本灵活性过低，我们要拥有Halcon辅助开发的能力

锚点开发是我们常用的开发方式，用于寻找相似点。如图为锚点

锚点二次开发

添加回调函数

回调函数在HDrawingObject的OnDrag函数中，

/// 

/// 画圆
/// 
/// 
/// 
private void Button_Click_1(object sender, RoutedEventArgs e)
{

    //创建一个圆形，圆心为(100,100)，半径为50
    var drawingObject = HDrawingObject.
        CreateDrawingObject(HDrawingObject.HDrawingObjectType.CIRCLE, new HTuple[] { 100, 100, 50 });

    //添加回调
    drawingObject.OnDrag(HDrawingObjectCallbackClass);
    //临时存放List
    drawingObjects.Add(drawingObject);

    //将圆画再hSmart画布上面
    hSmart.HalconWindow.AttachDrawingObjectToWindow(drawingObject);
	

}


/// 

/// 回调函数
/// 
/// 回调物体
/// 窗体
/// 类型
public void HDrawingObjectCallbackClass(HDrawingObject drawid, HWindow window, string type)
{
	//由于是圆形锚点，所以有x,y,radius三个属性
	var htuples = new HTuple[] {
	    drawid.GetDrawingObjectParams("row"),//x轴坐标
	    drawid.GetDrawingObjectParams("column"),//y轴坐标
	    drawid.GetDrawingObjectParams("radius"),//半径
	};

}

辅助Model类

在Halcon控件中，每个被创建的控件都会有一个唯一的ID，用于区别每个的信息。如果我想实时更新被拖动锚点的坐标，我就需要去调用HDrawingObject的GetDrawingObjectParams方法，就比较麻烦。所以我们可以通过自定义一个类用于方便的管理

/// 

/// 因为HDrawingObject没有坐标参数，所以我们为了方便操作添加创建了一个HDrawingObjectModel
/// 
public class HDrawingObject_CircleModel
{
    public HTuple? Row { get; set; }

    public HTuple? Column { get; set; }

    public HTuple? Radius { get; set; }

    public readonly HDrawingObject HDrawingObject;

    public readonly long Id;

    public HDrawingObject_CircleModel(HDrawingObject hDrawingObject)
    {
        HDrawingObject = hDrawingObject;
        Id = HDrawingObject.ID;

        Update(HDrawingObject);
    }



    public void Print()
    {
        System.Diagnostics.Debug.WriteLine($"id:[{HDrawingObject.ID}],row:[{Row}],column:[{Column}],radius:[{Radius}]");

    }

    public void Update(HDrawingObject hDrawingObject)
    {
        Row = hDrawingObject.GetDrawingObjectParams("row");
        Column = hDrawingObject.GetDrawingObjectParams("column");
        Radius = hDrawingObject.GetDrawingObjectParams("radius");
    }

}

然后我们新建一个List用于存放新增的锚点

/// 

/// 用来存放后面所有新增的锚点
/// 
private List<HDrawingObject_CircleModel> drawingObjects;

更新点击事件代码

/// 

/// 画圆
/// 
/// 
/// 
private void Button_Click_1(object sender, RoutedEventArgs e)
{

    //创建一个圆形，圆心为(100,100)，半径为50
    var drawingObject = HDrawingObject.
        CreateDrawingObject(HDrawingObject.HDrawingObjectType.CIRCLE, new HTuple[] { 100, 100, 50 });

    //----添加回调---
	//添加拖拽回调
	drawingObject.OnDrag(HDrawingObjectCallbackClass);
	//放缩变化
	drawingObject.OnResize(HDrawingObjectCallbackClass);

    var model = new HDrawingObject_CircleModel(drawingObject);
    //临时存放List
    drawingObjects.Add(model);
    model.Print();

    //将圆画再hSmart画布上面
    hSmart.HalconWindow.AttachDrawingObjectToWindow(drawingObject);


}

/// 

/// 回调函数
/// 
/// 回调物体
/// 窗体
/// 类型
public void HDrawingObjectCallbackClass(HDrawingObject drawid, HWindow window, string type)
{

    var drawObj = drawingObjects.FirstOrDefault(t => t.HDrawingObject.ID.Equals(drawid.ID));

    //如果不为空则打印
    if (drawObj != null)
    {
        drawObj.Update(drawid);
        drawObj.Print();
    }
    else
    {
        Debug.WriteLine($"drawid.id[{drawid.ID} is not find!]");
    }

}

结果

下集预告

下一期我将会讲解如何使用Halcon和C#进行混合开发，因为难度较大，所以我会咕咕咕一段时间，去了解一下怎么使用。应该是难度不大的，就是把Halcon的语言翻译一下。