Posts tagged with computer graphics

Thursday, February 28th, 2013

Finding Lightning in the Cloud

A picture is worth a thousand words, but could it also be worth a thousand searches or tweets to read? A few weeks ago when Pope Benedict XVI resigned, I sat in my office with a Davidson student discussing the news story. Neither of us knew much more than the historical decision being made. Wanting […]

Tuesday, August 14th, 2012

Adding some texture

In the last post, we began a series on creating computer graphics with POV-Ray. In that post, we constructed balls of various solid colors like that below. Now, let’s wrap textures around them. For example, the image: can be created from the code: #include”” #include”” #include”” #include”” camera { location look_at } sphere { , […]

Wednesday, July 25th, 2012

Become your own Pixar

Computer generated images are created, as clearly indicated by their name, on computers. How do computers generate such lovely pictures? A key is math modeling – underneath such programs are models of the physical world that determine the color of a pixel on the screen based on the light and the physical characteristics of the […]

Tuesday, January 3rd, 2012

A Color Change Charm for Ron Weasley

Ron Weasley’s twin brothers Fred and George convinced him that the following poem was a Color Change Charm: “Sunshine, daisies, butter mellow, turn this stupid, fat rat yellow.” The incantation of the poem was supposed to turn Ron’s rat Scabbers yellow. All Ron got was teasing and snickering from his brothers! If linear algebra were […]

Sunday, July 10th, 2011

A random planet

My online Loci article Mountains of Fractals allows readers to create fractal coastlines, fractal islands, and fractal mountains. One such mountain is pictured below. The 3D images are stunning and could even seem to overshadow the 2D counterparts. However, 2D fractal landscapes have their own important place in computer graphics. Suppose in a movie a […]