Writing a simple raytracer in Common Lisp [Note: This is a repost after I accidentally deleted the original one]. Nevertheless I find it a waste to let all that stuff linger on some old URL that apparently neither I nor any other people have been using for ages.
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Because of its functional influence Scala provides nice features to manipulate tree structures. As I mentioned in previous posts, I think one of the most interesting features provided by Scala is pattern matching.
Among other pattern matching constructsScala provides one that I particularly like: One of this techniques is the Visitor design pattern which is one of the most used techniques that is used to navigate a syntax tree structure.
I think the pattern matching approach can be combined with the visitors to solve different tasks. Scala extractor objects allow existing Scala or Java Platform classes to participate in pattern matching just as case classes.
Extractor objects can be used to expose only interesting elements for a certain problem and also makes the definition of the class independent of the way it is used in a match construct. A similar feature is implemented in F as active patterns.
This concept was originated by work on Views by Philip Walder. Say that you want to identify the key value that is given to Hash assignment: In order to do this I'm going to use the tool from the previous post to see which classes we need to represent.
By reading this code we noticed that we need at least extractors for BlockNode.Linux Software Packages. The version/release/update numbers have been removed from the names, since they are not relevant in this context.
If you need to know what version came with your particular distribution, you should look at the installation media, or query the package manager (rpm, dpkg, etc.). There are many algorithms, especially but not limited to AI, that can be coded in Lisp using something like1/ of the number of lines of C/C++ code, and run in 1/10 of the time, despite the language predating C by 14 years, and being 'hampered' by a garbage collector (yes, .
Dec 06, · Which, as is so common for gamedev, a lot of bluster but no substance. then why are you writing your raytracer in C Rayiner? Rayiner Hashem. For reference, here is the lisp code. CLISP is an implementation of Common Lisp that closely follows the book "Common Lisp - The Language" by Guy L.
Steele Jr. This package includes an interactive programming environment with an interpreter, a compiler, and a debugger. See all › 18 References.
See all ›. Nov 11, · Maybe “reference” would’ve been a better name for this language construct. 2- Go interfaces!= Java interfaces. In Java you must explicitly say class A implements interface B.