Tag Archives: example program

Calculate the gamma function in C#

Posted on February 28, 2021 by RodStephens

The gamma function, represented by the capital Greek letter gamma Γ, was derived by Daniel Bernoulli for complex numbers with a positive real part. The interesting thing about the gamma function is that &Gamma(n + 1) = n! for integers … Continue reading →

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Find rectangles defined by a side and aspect ratio in C#

Posted on February 23, 2021 by RodStephens

You probably haven’t needed to make your program draw rectangles that are defined by specifying one of its sides. I haven’t either, but I want this for another program that I plan to write. Of course a single side isn’t … Continue reading →

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Zip files with the ZipFile class in C#

Posted on February 12, 2021 by RodStephens

The static ZipFile class is relatively new (.NET Framework 4.5 and later), so this example uses Visual Studio 2019. The following section explains how to load the ZipFile class in a Visual Studio 2019 project. The rest of this post … Continue reading →

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Simulate a doubling betting strategy in C#

Posted on February 5, 2021 by RodStephens

Casinos love customers who have a betting strategy because those customers always end up losing. As long as the game’s events are independent of each other (for example, one roll of the dice does not depend on the previous rolls), … Continue reading →

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Book Drawing: C++ All-in-One For Dummies, 4th Edition

Posted on February 3, 2021 by RodStephens

John Mueller has kindly donated five copies of his book C++ All-in-One For Dummies, 4th Edition for me to give away. The only catch is that you should post a review on Amazon when you’ve had a chance to look … Continue reading →

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Use k-means clustering to find clusters of data in C#

Posted on January 26, 2021 by RodStephens

I was recently editing John Mueller and Luca Massaron’s book Machine Learning For Dummies, Second Edition. (This link is for the first edition. I’ll try to remember to update it when the new edition is available.) The book is about … Continue reading →

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Automatically set camera distance in WPF and C#

Posted on January 26, 2021 by RodStephens

This example extends the post Build a geodesic sphere with WPF and C# to let you automatically set the camera distance to make the scene fill the viewport. Making a 3D scene fill the viewport nicely can be tricky. The … Continue reading →

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Make numbered buttons in C#

Posted on January 19, 2021 by RodStephens

This program lets you create a sequence of images that look like numbered buttons. It’s another program that I seem to recreate periodically. Click the Background and Foreground color swatches to change those colors. Use the numeric up/down controls to … Continue reading →

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Enlarge a polygon that has colinear vertices in C#

Posted on December 1, 2020 by RodStephens

The example Enlarge a polygon in C# shows how you can expand a polygon. The basic idea is to offset each of the polygon’s edges away from the polygon’s center and then see where adjacent edges intersect as shown in … Continue reading →

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Use the mouse wheel to scale images while cropping them to a desired aspect ratio in C#

Posted on November 19, 2020 by RodStephens

This example adds mouse wheel support to the example Crop scaled images to a desired aspect ratio in C#. Some social media platforms work best with a 4:3 aspect ratio, so I use that example almost every day to crop … Continue reading →

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