
Recent Posts

Recent Comments
 Let the user scribble on a background image in C#  C# HelperC# Helper on Let the user scribble on a PictureBox in C#
 Ziz on Revised: Graph world total COVID19 cases, deaths, and recoveries in C#
 RodStephens on Handle generic TreeNode mouse events in C#
 RodStephens on Let the user scribble on a PictureBox in C#
 SeungGi on Handle generic TreeNode mouse events in C#
Archives
 September 2020
 August 2020
 July 2020
 June 2020
 May 2020
 April 2020
 March 2020
 February 2020
 January 2020
 December 2019
 November 2019
 October 2019
 September 2019
 August 2019
 July 2019
 June 2019
 May 2019
 April 2019
 March 2019
 February 2019
 January 2019
 December 2018
 November 2018
 October 2018
 September 2018
 August 2018
 July 2018
 June 2018
 May 2018
 April 2018
 March 2018
 February 2018
 January 2018
 December 2017
 November 2017
 October 2017
 September 2017
 August 2017
 July 2017
 June 2017
 May 2017
 April 2017
 March 2017
 February 2017
 January 2017
 December 2016
 November 2016
 October 2016
 September 2016
 August 2016
 July 2016
 June 2016
 May 2016
 April 2016
 March 2016
 February 2016
 January 2016
 December 2015
 November 2015
 October 2015
 September 2015
 August 2015
 July 2015
 June 2015
 May 2015
 April 2015
 March 2015
 February 2015
 January 2015
 December 2014
 November 2014
 October 2014
 September 2014
 August 2014
 July 2014
 June 2014
 May 2014
 February 2014
 January 2014
 December 2013
 October 2013
 August 2013
 June 2013
 December 2012
 September 2012
 July 2012
 June 2012
 November 2011
 May 2011
 April 2011
 February 2011
 December 2010
Categories
 .NET
 3D
 3D graphics
 ADO.NET
 algorithms
 animation
 API
 arrays
 attributes
 audio
 books
 C#
 C# programming
 calculations
 challenges
 classes
 clipboard
 coding
 combinatorics
 console
 controls
 cryptography
 curve fitting
 database
 debugging
 dialogs
 directories
 Drag and Drop
 drawing
 drawings
 enums
 Event
 events
 example program
 Excel
 extension methods
 extensions
 files
 finance
 fonts
 formatting
 forms
 fractals
 ftp
 games
 GDI+
 generic
 geometry
 globalization
 graphics
 html
 IDE
 image processing
 inheritance
 interfaces
 internationalization
 internet
 interoperability
 LINQ
 lists
 localization
 mathematics
 memory
 menus
 MessageBox
 methods
 miscellany
 multimedia
 network
 Office
 OOP
 operators
 parsing
 performance
 phone
 PowerPoint
 printers
 printing
 productivity
 programs
 puzzles
 recursion
 reflection
 registry
 regular expressions
 serialization
 settings
 SQL
 stories
 strings
 syntax
 system
 threading
 threedimensional graphics
 tips
 tools
 transformations
 Uncategorized
 user interface
 variables
 VBA
 web
 Windows Forms programming
 WMI
 Word
 wpf
 XAML
 XML
Meta
Tag Archives: intersection
Perform set operations on enumerable lists in C#
To demonstrate set operations, this example creates two lists of Person objects. The Person class implements IEquatable. The code then uses the following code to display the lists and their intersection, union, difference, and exclusive or (xor). // Display the … Continue reading
Posted in mathematics
Tagged C#, C# programming, example, example program, except, exclusion, intersection, mathematics, set operations, sets, union, Windows Forms programming, xor
Leave a comment
Calculate where a line segment and an ellipse intersect in C#
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
Find the shortest distance between a point and a line segment in C#
This example treats the segment as parameterized vector where the parameter t varies from 0 to 1. It finds the value of t that minimizes the distance from the point to the line. If t is between 0.0 and 1.0, … Continue reading
Enlarge a polygon in C#
This example shows how you can enlarge a polygon by a certain distance. For example, you can use it to move the edges of the polygon outward by 10 pixels. The program lets you use the mouse to define the … Continue reading
Use set operators in C#
This example shows how you can add set operators to make working with sets slightly easier. The example Perform set operations in C# explains how to use the HashSet class to represent and manipulate sets. Unfortunately to manipulate the sets … Continue reading
Posted in algorithms, classes, mathematics
Tagged algorithms, C#, C# programming, classes, example, example program, hash sets, HashSet, intersection, mathematics, operators, set operations, set operators, sets, union, Windows Forms programming, xor
Leave a comment
See where a line intersects a conic section in C#
This example shows how you can see where a line intersects a conic section. You can use the more general method described in the post See where two conic sections intersect in C#. This example takes advantage of the simpler … Continue reading
See where a parabola and hyperbola intersect in C#
This example shows how to see where a parabola and hyperbola intersect. The previous fourpart example here, here, here, and here explains how to find the points of intersections between two conic sections. Although the posts focus on finding points … Continue reading
See where two ellipses intersect in C#, Part 4
This post explains why Newton’s method may not be the best way to find the roots of the difference equations used to see where two ellipses intersect. The final step in finding the points of intersection between two ellipses (or … Continue reading
Posted in algorithms, geometry, graphics, mathematics
Tagged algorithms, C#, C# programming, ellipse, example, example program, geometry, intersection, mathematics, points of intersection, Windows Forms programming
2 Comments
See where two ellipses intersect in C#, Part 3
This post summarizes the method you can use to see where two ellipses intersect. (Or any two conic sections, for that matter.) It also explains the example program. To find the points of intersection: Get the equations for the ellipses. … Continue reading
Posted in algorithms, geometry, graphics, mathematics
Tagged algorithms, C#, C# programming, ellipse, example, example program, geometry, intersection, mathematics, points of intersection, Windows Forms programming
1 Comment
See where two ellipses intersect in C#, Part 2
This post shows The Ugly Math that you can use to see where two ellipses intersect. Brace yourself! Here it comes! First recall the quadratic formula. If ax2 + bx + c = 0, then: Now consider the formula for … Continue reading
Posted in algorithms, geometry, mathematics
Tagged algorithms, C#, C# programming, ellipse, example, example program, geometry, intersection, mathematics, points of intersection, Windows Forms programming
1 Comment