January 5, 2013 – 7:29 pm
In this post we are going to describe and implement non-planar samplers. In the previous post about samplers, we implemented and characterized different planar samplers to make antialiasing possible. The characteristic of these samplers was to produce regular or random points on a plane with x,y between zero and one. To implement effects such as [...]
After having finally obtained a raytracer which produces antialiasing, it is now time to take a look at performance. We already saw some numbers in the last post. Rendering a 200×200 image with 16 samples per pixels (a grand total of 640.000 rays) takes definitely too much. I want to perform some profiling with python, [...]
February 5, 2012 – 2:02 am
In the previous post, we explored a very basic way of plotting images: shooting a ray from the center of every pixel, and plot the color of the object we hit. The result is a rather flat, very jagged image Border jagging arises from the fact that we are sampling with a discrete grid (our [...]
November 5, 2011 – 9:18 pm
A quick addition needed to the raytracer is providing freedom to add more objects to the rendering scene. In Part 1, the design was such that only one object, a sphere, could be drawn. The new code allows much more flexibility. I added a Plane object, introduced assignment of colors to the objects, divided the [...]
September 5, 2011 – 11:53 pm
Some time ago I visited Sydney, and I made a tragic mistake: I entered the University bookshop. Why a mistake, you say? I am book maniac. As soon as I enter a book shop (live or on web) I end up spending up to a thousands euro every time. This time, it was not the [...]