C# Archive
11 Aug 2015
How to obtain the minimum and maximum values from a list in Grasshopper
Sometimes you need to know what the minimum and the maximum values are in a list or from a collection of lists. In Grasshopper, there are min and max components which will take two values and return the minimum and maximum respectively, but there isn’t a component for finding the min/max values within a list
23 Jul 2015
How to convert OpenCV cv::mat to System Bitmap to System ImageSource
OpenCV is an open source computer vision library which can be used for a wide variety of things such as face recognition, people detection, motion tracking, video editing and image manipulation. For my undergraduate project, I made use of the OpenCV libraries to create a facial recognition system. It used a webcam to detect ID
22 Jul 2015
How to access geometry Guids in Grasshopper components
This month has been a nice month for software development in my research, working on creating new analysis for healthcare design. The majority of it has been relatively straight forward (except the interpolation issue) working in C++ to produce the analysis. However, to move towards a tool which can be used in industry, I have
16 Jul 2015
Interpolating data points to produce colour maps – code examples
For a lot of the work I do in my research, I need to produce colour maps which can visualise data in a user-friendly way while still getting across the necessary elements of the analysis performed. In my current area of research, looking at wayfinding tools to analyse healthcare building design for natural wayfinding, I’m
05 Jul 2015
Obtaining the angle between two vectors for 360 degrees
This previous post demonstrated how to obtain the angle between two vectors from three geometric points, providing an angle between 0-180 degrees. However, there may be times when you need the angle between 0-360 degrees instead, as I did earlier this week. As such, this post aims to complete the previous with the solution for
05 Jul 2015
Calculating angle between two vectors from geometric points – code solution
Calculating the angle between two vectors is a fairly easy solution to find online – there are plenty of maths help websites which will take you through step by step how to work out the angle, however, not many sites will provide you with the necessary programming code to put this into your software. As
30 Jun 2015
For loops – running method calls in the declaration
For loops are a key part of recursive code, allowing us to iterate over items in a vector, or perform actions a set number of times without repeating the lines of code. We all know how they can be applied and declared, however, something which may not be very well-known is the ability to call
28 Jun 2015
Mouse Jiggle Tool – Create your own in C#
Mouse jiggling is rarely a useful tool or achievement except in cases where sending the computer to sleep would cause the interruption of another process – a system scan, render, or other such task which takes a large amount of time and you wish to leave it running over night. Even then, the usefulness of
19 Jun 2015
Obtaining the points that make up a polyline in Grasshopper/Rhino
As part of my EngD I work alongside other engineers solving day-to-day problems. James, a fellow research engineer at BuroHappold, and I regularly venture down the path of Grasshopper development. James works in Grasshopper for the majority of his work and his website (viewable here) contains a lot of hints and tips on getting Grasshopper
18 Jun 2015
C# Global Keyboard Listeners – implementation of key hooks
In a previous post I briefly outlined the pros and cons of using global event listeners. Although the summary was to use them with caution, the entire use of listeners only came about due to a quick bit of personal programming I did yesterday, in which global listeners were a necessity (due to the program