Category Archives: geometry

Make an intuitive extension method to draw an elliptical arc in WPF and C#

Posted on May 20, 2019 by RodStephens

In my previous post Draw an elliptical arc in WPF and XAML, I explained how WPF makes you define an elliptical arc. Their method almost makes sense if you want draw an arc as part of a path. however, if … Continue reading →

Posted in drawing, geometry, graphics, mathematics, wpf, XAML | Tagged arc, C#, C# programming, drawing, elliptical arc, example, example program, geometry, graphics, mathematics, Windows Forms programming, WPF, XAML | Leave a comment

Draw an elliptical arc in WPF and XAML

Posted on May 17, 2019 by RodStephens

This example shows how to use XAML code to draw an elliptical arc in a WPF. The following sections explain how to specify an elliptical arc and how to draw one in XAML. Specifying an Elliptical Arc WPF provides several … Continue reading →

Solve Geometric Problems with C#

Posted on January 29, 2019 by RodStephens

[This is a promo piece by Packt, the publisher of my book The Modern C# Challenge. It includes two of the 100 example problems and solutions in the book.] Solve Geometric Problems with C# Learn how to solve C# geometric … Continue reading →

Posted in books, geometry, mathematics | Tagged books, C#, C# programming, example, example program, geometry, mathematics, Newton, Pi, The Modern C# Challenge, Windows Forms programming | Leave a comment

Review posted: “The Modern C# Challenge”

Posted on November 2, 2018 by RodStephens

The Modern C# Challenge: Become an expert C# programmer by solving interesting programming problems Clock End Gooner has posted a review of my latest book, The Modern C# Challenge: Become an expert C# programmer by solving interesting programming problems. Please … Continue reading →

Posted in books, combinatorics, cryptography, geometry, mathematics | Leave a comment

Graph points in WPF and C#

Posted on August 23, 2018 by RodStephens

This example extends the previous example Draw a graph in WPF and C# to draw ellipses marking the data sets’ points. See that example for an explanation of how most of the program works. The following code shows how the … Continue reading →

Posted in algorithms, drawing, geometry, graphics, mathematics, wpf | Tagged algorithms, C#, C# programming, draw graph, draw graph in WPF, drawing, example, example program, geometry, GeometryGroup, graph, graph points, graphics, LineGeometry, mathematics, Polyline, Windows Forms programming, WPF, XAML | 2 Comments

Use a custom dash pattern with WPF and XAML in C#

Posted on March 13, 2018 by RodStephens

My post Render dashed lines in a WPF program using C# explains how a WPF program can use C# code to render lines with a custom dash pattern onto a bitmap. This post shows how to use a custom dash … Continue reading →

Posted in drawing, geometry, graphics, wpf, XAML | Tagged C#, C# programming, custom dash pattern, dash, DashDot, dashed lines, dotted lines, draw strings, draw text, drawing, example, example program, geometry, graphics, OnRender, render, rendering, strings, text, Windows Forms programming, WPF, XAML | Leave a comment

Draw text on a circle in C#

Posted on February 14, 2018 by Rod Stephens

This example uses some of the techniques described in the post Measure character positions when drawing long strings in C# to draw text on a circle. The previous post explains how to determine where the characters in a string will … Continue reading →

Posted in algorithms, fonts, geometry, graphics, strings | Tagged algorithms, C#, C# programming, characters, circle, circular text, draw string, draw text, draw text on circle, example, example program, fonts, geometry, graphics, measure characters, MeasureCharacterRanges, strings, text on a circle, text on circle, Windows Forms programming | 1 Comment

Calculate where a line segment and an ellipse intersect in C#

Posted on August 3, 2017 by Rod Stephens

Finding the intersection between a line segment and an ellipse requires a lot of mathematics. It’s not particularly hard mathematics, but if you’d rather skip it, you can use the following links to jump to the other parts of this … Continue reading →

Posted in algorithms, drawing, geometry, graphics, mathematics | Tagged algorithms, C#, C# programming, drawing, ellipse, ellipse line intersection, ellipse/line intersection, example, example program, geometry, graphics, intersection, line, line ellipse intersection, line segment, line/ellipse intersection, mathematics, Windows Forms programming | 7 Comments

Generate random polygons in C#

Posted on July 7, 2017 by Rod Stephens

I needed a method for generating random polygons for a graphics program and the following code shows the result. // Make random polygons inside the bounding rectangle. private static Random rand = new Random(); public static PointF[] MakeRandomPolygon( int num_vertices, … Continue reading →

Posted in algorithms, geometry, graphics | Tagged algorithms, C#, C# programming, example, example program, geometry, graphics, random polygon, random polygons, Windows Forms programming | Leave a comment

Make silly eyes that track the mouse without flicker in C#

Posted on May 27, 2017 by Rod Stephens

The example Make silly eyes that track the mouse in C# shows how to make eyes track the mouse position, but if you look closely as that program runs you will see a noticeable flicker. The solution is quite simple: … Continue reading →