Tag Archives: example program

Make a hexagonal montage of pictures in C#

Posted on January 23, 2020 by RodStephens

This example combines techniques from several earlier posts to make a hexagonal montage. It uses the techniques demonstrated in the post Draw a hexagonal grid in C# to define the grid and to make positions on the form two and … Continue reading →

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Find drawn characters under the mouse in C#

Posted on January 20, 2020 by RodStephens

The following examples find the positions of drawn characters in a string that is drawn by using the Graphics object’s DrawString method. Measure character positions in a drawn string in C# Measure character positions when drawing long strings in C# … Continue reading →

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Clip an image to a polygon in C#

Posted on January 16, 2020 by RodStephens

This example lets you select a polygon and then uses it to clip an image to it. It uses the technique described in my previous post Build a polygon selector class in C# to let you select the polygon. The … Continue reading →

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Build a polygon selector class in C#

Posted on January 9, 2020 by RodStephens

This example shows how to make a polygon selector class that makes it easy to let the user select a polygon. I call this kind of class that provides a service for another class a symbiont. In a symbiotic relationship, … Continue reading →

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Arrange images on the corners of a polygon in C#

Posted on January 5, 2020 by RodStephens

This post shows a way to arrange images on top of a background image as shown in the image above. How to Use the Program Enter the names of the background and foreground image files, or use the File menu’s … Continue reading →

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Make an improved diagonal picture montage in C#

Posted on December 26, 2019 by RodStephens

My earlier example Make a Pinterest-style diagonal picture montage in C# showed how you could make a picture montage showing parts of images rotated by a desired angle. While using that program today I found a small bug. The areas … Continue reading →

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Use VBA to randomize Excel selections

Posted on December 20, 2019 by RodStephens

The post Use VBA to randomize cells in Excel explains how you can randomize a simple selection’s rows. Unfortunately that method cannot randomize Excel selections in general. In particular it doesn’t work if the current selection includes multiple areas on … Continue reading →

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Understand range areas in Excel VBA

Posted on December 18, 2019 by RodStephens

Most of my VBA examples assume that the current selection is a single block of cells. If the selection includes a single area, then you can easily loop through the cells that it contains. Unfortunately if the selection includes multiple … Continue reading →

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Let the user draw rotated skewed polygons in C#

Posted on December 13, 2019 by RodStephens

The example Let the user draw rotated polygons with right angles in C# draws polygons with edges that are parallel or perpendicular to a baseline. This example is very similar except its polygons have edges that are parallel to one … Continue reading →

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Let the user draw rotated polygons with right angles in C#

Posted on December 8, 2019 by RodStephens

This example lets the user draw rotated polygons where all edges are either parallel or perpendicular to a defined baseline direction. As a result, all of the polygon’s angles are right angles. (And yes, I know that the polygons aren’t … Continue reading →

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