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April 2005 Archives

April 19, 2005

Finally, another Common Lisp library

It's seems like a long time since I started a new Common Lisp project. I've been getting tired of creating ad-hoc spreadsheets to calculate some moderate complex photography formulas and started to use the Lisp REPL for evaluating some of these formulas.

That worked so well that I started formalizing these formulas into a new Common Lisp library: cl-photo. At the moment, the library has rather extensive field of view, angle of view, depth of field, hyperfocal distances, and circle of confusion calculations with flexible length units.

I'll be adding more formulas, web references, and documentation. After that, I may add an interactive web calculator, though, the calculations would likely be best done in Javascript rather than CGI or a web application. CGI has the disadvantage that starting a Lisp session has high overhead and a web application has the disadvantage of yet another daemon to maintain 24x7. A Common Lisp to Javascript translator would be a handy thing...

April 23, 2005

Online Photography Calculator

I've greatly improved cl-photo since it's initial release earlier this week. I wrote a CGI calculator to compute some common (and not so common) photography values.

About April 2005

This page contains all entries posted to Kevin Rosenberg in April 2005. They are listed from oldest to newest.

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