在C#中查找多边形的高度和宽度 [英] Finding the Height and width of a Polygon in C#

问题描述

我们如何找到由一些点组成的多边形的高度和宽度.

例如:在窗口上，每单击一次鼠标，鼠标单击一次都会给出一个点，如果我单击一个按钮，则鼠标单击的位置将合并并形成一个形状.
直到这很好.我可以计算中心点，但如何找到所形成形状的高度和宽度.

任何人都可以给我一个更好理解的例子

谢谢，

Hi,
How can we find the Height and width of a polygon which is formed with some points.

Eg:on the window each mouse click gives a point after some clicks if i click on a button the mouse click locations will join and form a shape.
Till this it is fine. iam able to calculate the center point, but how we can find the height and width of the formed shape.

any one can give me a example for better understanding

Thanks,

推荐答案

每次通过鼠标单击在屏幕上设置一个点时，您都​​必须注意以下几点.

Everytime you set a point to the screen via a mouse click you''ll have to take note of the following.

1. X _min = int.MaxValue;
   X _max = int.MinValue;
   
   Y _min = int.MaxValue;
   Y _max = int.MinValue;
   
2. 如果当前设置的X坐标小于X _min ，请将其设置为X.
   如果当前设置的X坐标大于X _max ，则将其设置为X.
   如果当前设置的Y坐标小于Y _min ，则将其设置为Y.
   如果当前设置的Y坐标大于Y _max ，则将其设置为Y.
   
3. 最终按下按钮绘制多边形时，边界矩形由以下坐标定义:
   
   左上角:(X _min ，Y _max )
   右上角:( X _max ，Y _max )
   左下角:(X _min ，Y _min )
   右下角:( X _max ，Y _min )
   高度:Y _max -Y _min
   宽度:  X _max -X _min
   
   

1. X_min = int.MaxValue;
   X_max = int.MinValue;
   
   Y_min = int.MaxValue;
   Y_max = int.MinValue;
   
2. If the currently set X coordinate is smaller than than X_min, set that to X.
   If the currently set X coordinate is greater than than X_max, set that to X.
   If the currently set Y coordinate is smaller than than Y_min, set that to Y.
   If the currently set Y coordinate is greater than than Y_max, set that to Y.
   
3. When you finally press the button to draw your polygon, the bounding rectangle is defined by these coordinates:
   
   Upper left corner:  ( X_min, Y_max )
   Upper right corner: ( X_max, Y_max )
   Lower left corner:  ( X_min, Y_min )
   Lower right corner: ( X_max, Y_min )
   Height: Y_max - Y_min
   Width:  X_max - X_min
   
   

最好的问候，

—MRB

Best Regards,

—MRB

将所有点添加到System.Drawing.Drawing2D.GraphicsPath，这样便可以调用其BoundingBox属性.它的类型为RectangleF，因此公开了开发人员可能想知道的所有坐标.

Add all your points to a System.Drawing.Drawing2D.GraphicsPath, then you are able to call its BoundingBox property. It is of type RectangleF and therefore exposes all co-ordinates a developer can ever want to know.

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