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Category Archives: drawing
Let the user edit polygons in WPF and C#
The post Let the user draw a polygon in WPF and C# shows how you can let the user draw polygons in a WPF application. This post shows how you can let the user edit them. Individually the program’s pieces … Continue reading
Posted in drawing, graphics, wpf
Tagged C#, C# programming, drawing, example, example program, graphics, polygon, Windows Forms programming, WPF
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Let the user draw a polygon in WPF and C#
In a Windows Forms application, you can let the user draw a polygon by tracking mouse movement and redrawing the picture whenever necessary to draw the partially completed polygon. A WPF program normally does not do its own drawing. Instead … Continue reading
Posted in drawing, graphics, wpf
Tagged C#, C# programming, drawing, example, example program, graphics, polygon, Windows Forms programming, WPF
1 Comment
Draw many circles that intersect two points in C#
As I mentioned in my earlier post Connect two points with elliptical arcs in C#, an infinite number of circles (or ellipses) can pass through two points. This example draws some of them to produce an interesting pattern. This example … Continue reading
Posted in algorithms, drawing, graphics, mathematics
Tagged algorithms, C#, C# programming, circles, drawing, example, example program, graphics, mathematics, points, Windows Forms programming
1 Comment
Connect two points with elliptical arcs in C#
As I mentioned in my earlier post Connect two points with arcs of midpoint circles in C#, two points alone cannot uniquely define a circle. An infinite number of circles (or ellipses) can pass through two points and therefore they … Continue reading
Posted in drawing, graphics, mathematics
Tagged arcs, C#, C# programming, drawing, example, example program, graphics, mathematics, midpoint, points, Windows Forms programming
1 Comment
Connect two points with arcs of midpoint circles in C#
Two points alone cannot uniquely define a circle because an infinite number of circles can pass through two points and therefore they can be connected by an infinite number of arcs. If you add extra information, however, two points can … Continue reading
Posted in drawing, graphics, mathematics
Tagged C#, C# programming, circles, drawing, example, example program, graphics, mathematics, midpoint, points, Windows Forms programming
1 Comment
Improve the program that displays COVID-19 data for US states in C#
This post describes two improvements to the earlier example that displays COVID-19 data for US states. The first change is a basic software engineering improvement. The second displays daily changes in COVID-19 case, hospitalization, and death numbers. Software Engineering Notes … Continue reading
Posted in drawing, graphics
Tagged C#, C# programming, cases per million, corona virus, coronavirus, COVID-19, COVID-19 deaths, COVID-19 deaths per million, COVID-19 recoveries, COVID-19 resolutions, deaths per million, drawing, example, example program, graphics, pandemic, US corona virus, US coronavirus, US COVID-19, Windows Forms programming
2 Comments
Create a Contain FillMode for filling polygons in C#
The example Understand fill modes in C# showed how the Alternate and Winding FillMode values affect the result when you fill a self-intersecting polygon. In many cases, the Alternate FillMode leaves holes in a self-intersecting polygon while the Winding FillMode … Continue reading
Posted in algorithms, drawing, graphics
Tagged algorithms, C#, C# programming, drawing, example, example program, FillMode, graphics, polygon, polygon fill, self-overlapping polygon, Windows Forms programming
2 Comments
Crop scaled images to specific sizes in C#
This example lets you crop scaled images to specific sizes in C#. The post Crop images to specific sizes in C# lets you drag a rectangle of a specified size around on an image to pick the part of the … Continue reading
Posted in drawing, graphics, image processing, tools
Tagged C#, C# programming, crop scaled images, drawing, example, example program, graphics, image processing, scaled images, size images, tools, Windows Forms programming
2 Comments
Understand fill modes in C#
C# drawing routines have two fill modes. In Windows Forms they are called Alternate and Winding. In WPF they are called Odd/Even and Non-Zero. This example lets you draw polygons and see how the two fill modes determine which points … Continue reading
Posted in drawing, graphics
Tagged C#, C# programming, drawing, example, example program, fill modes, FillMode, graphics, Windows Forms programming
1 Comment
Display COVID-19 data for US states in C#
The example Graph world total COVID-19 cases, deaths, and recoveries in C# lets you view and compare COVID-19 data for countries around the world. This example lets you compare data for the US states and territories. I asked in previous … Continue reading
Posted in drawing, graphics
Tagged C#, C# programming, cases per million, corona virus, coronavirus, COVID-19, COVID-19 deaths, COVID-19 deaths per million, COVID-19 recoveries, COVID-19 resolutions, deaths per million, drawing, example, example program, graphics, pandemic, US corona virus, US coronavirus, US COVID-19, Windows Forms programming
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