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OpenGL / C / C++ - an example to get you started

Open GL - sample from C courseA Computer Graphics application in C / C++ - that's the coding that one of my delegates is going to be doing for her "real work" after this week's course, and I found myself looking back to old times - when I used (amongst other things) to subcontract to Silicon Graphics to present courses on their GL Library - the forerunner of OpenGL.

It's surprising just how quickly things come back - this graphic was a quick example that I played with, setting up an image, drawing some vectors onto it, and swapping my buffers - the Silicon Graphics system was almost always double buffered, and (joy of joys) addressable with world rather than pixel co-ordinates.

The pretty pattern shown here is quite a short program - a "hello graphics world" example that I wrote to show a very simple program, and all the libraries, etc, that were needed at load time for it to work on my system (Xcode on Mac OS X). Source is [here] and includes my load line so that you - if you have a similar environment to mine - won't end up having to play "hunt the include file" and "hunt the library".

(written 2011-01-26)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
C211 - C and C based languages - Standard Libraries and other headers
  [4465] Sockets, time handling and keyboard interrupt handling in C - (2015-03-27)
  [3244] C and C++ - preprocess, compile, load, run - what each step is for - (2011-04-12)
  [3234] Your program - you just provide the filling in the sandwich - (2011-04-08)
  [2575] Sharing variables between files of code in C - extern - (2010-01-14)

Q913 - Object Orientation and General technical topics - Computer Graphics Principles
  [3262] Some SVG Elements, pixel and percent positioning - (2011-04-24)
  [3261] Scalable Vector Graphics - easy, low bandwidth, high resolution, dynamic. - (2011-04-23)
  [3211] Computer Graphics in PHP - World (incoming data) to Pixel (screen) conversion - (2011-03-24)
  [3049] Computer Graphics is fun - even if Java Applets are Old Hat - (2010-11-13)
  [2992] Matplotlib - graphing in Python - teaching examples - (2010-10-10)
  [2758] But what will you DO with all those pictures? - (2010-05-09)
  [2633] Why do I teach niche skills rather than mainstream? - (2010-02-13)
  [2245] Client side (Applet) and Server side (Servlet) Graphics in Java - (2009-06-17)


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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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