Finding the Height and width of a Polygon in C#

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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,

Posted 29-Aug-11 22:50pm

KiranBabu M

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Manfred Rudolf Bihy · Accepted Answer · 2011-08-29T23:24:00

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

X_min = int.MaxValue;
X_max = int.MinValue;

Y_min = int.MaxValue;
Y_max = int.MinValue;
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.
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

Best Regards,

—MRB

lukeer · Accepted Answer · 2011-08-30T00:18:00

Solution 2

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.

Posted 30-Aug-11 0:18am

lukeer

Comments

Manfred Rudolf Bihy 30-Aug-11 6:37am

Elegant solution! 5+

KiranBabu M 26-Sep-11 5:45am

Thanks for the solution