Category Archives: drawing

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 | Leave a comment

Draw rose curves in C#

Posted on July 27, 2018 by RodStephens

A rose curve is a curve generated by the polar coordinate equation r = cos(n / d * θ). Here n and d should be relatively prime, so the fraction n / d cannot be simplified. When you click the … Continue reading →

Posted in algorithms, drawing, graphics, mathematics | Tagged algorithms, C#, C# programming, drawing, example, example program, graphics. mathematics, rose curves, Windows Forms programming | Leave a comment

Draw the spiral of Theodorus in C#

Posted on June 19, 2018 by RodStephens

The spiral of Theodorus (which is also called the square root spiral, Einstein spiral, and Pythagorean spiral) was first devised by the Greek mathematician Theodorus of Cyrene during the 5th century BC. The spiral consists of a sequence of right … Continue reading →

Posted in algorithms, drawing, graphics, mathematics | Tagged algorithms, C#, C# programming, drawing, Einstein spiral, example, example program, graphics, mathematics, Pythagorean spiral, root spiral, spiral, spiral of Theodorus, Windows Forms programming | Leave a comment

Draw a Pythagoras tree fractal in C#

Posted on April 27, 2018 by RodStephens

A Pythagoras tree (or Pythagorean tree) is a fractal tree built from squares. It starts with a square that forms the tree’s base. The program then makes the Pythagoras tree by recursively attaching two smaller branches to the original branch. … Continue reading →

Posted in drawing, fractals, graphics, recursion | Tagged C#, C# programming, drawing, example, example program, fractals, graphics, Pythagoras tree, Pythagorean tree, recursion, Windows Forms programming | 1 Comment

Draw a Sierpinski pentagon in C#

Posted on April 25, 2018 by RodStephens

In a Sierpinski pentagon, larger pentagons are recursively divided into five smaller pentagons with a sixth uncolored pentagon in the center. The following picture shows the first four levels of the resulting fractal. For this example, I decided to think … Continue reading →

Posted in drawing, fractals, graphics, recursion | Tagged C#, C# programming, drawing, example, example program, fractals, graphics, recursion, recursively, Sierpinski pentagon, Windows Forms programming | 2 Comments

Use an animated cursor in C#

Posted on April 11, 2018 by Rod Stephens

This example doesn’t show how to use an animated cursor file such as an animated gif or png file. As far as I know, C# doesn’t support that kind of cursor. What this example does do is show how to … Continue reading →

Posted in drawing, graphics | Tagged animated cursor, Bitmap, C#, C# programming, cursor, drawing, example, example program, graphics, make animated cursor, transform, transformation, Windows Forms programming | Leave a comment

Create ListView icons at run time in C#

Posted on April 3, 2018 by Rod Stephens

The example Display large and small ListView icons in C# explains how to display ListView icons next to items. Basically, you place the images in two ImageList controls, set the ListView control’s LargeImageList and SmallImageList properties to those two controls, … Continue reading →

Posted in controls, drawing, graphics | Tagged C#, C# programming, controls, Details, drawing, example, example program, graphics, icons, LargeIcon, list, ListView, ListView icons, SmallIcon, tile, View, Windows Forms programming | Leave a comment

Draw a cursor and use it at run time in C#

Posted on March 29, 2018 by Rod Stephens

It’s not too hard to draw a cursor and use it in a C# program. The basic approach is to create a Bitmap and then create a new Cursor object, passing its constructor the Bitmap object’s icon handle as given … Continue reading →

Posted in drawing, graphics | Tagged bitmaps, C#, C# programming, cursors, draw a cursor, draw cursor, drawing, example, example program, graphics, make cursor, make cursor from bitmap, Windows Forms programming | Leave a comment

Fix rectangle SmoothingMode problems in C#

Posted on March 27, 2018 by Rod Stephens

This example explains how to fix a rather obscure SmoothingMode problem. If you look closely at the PictureBox on the right in the picture, you’ll see that its top and leftmost pixels are not the same color as the rest … Continue reading →

Posted in drawing, graphics | Tagged anti aliasing, antialiasing, C#, C# programming, drawing, example, example program, graphics, SmoothingMode, Windows Forms programming | Leave a comment

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 →