From mboxrd@z Thu Jan 1 00:00:00 1970 From: krewat at kilonet.net (Arthur Krewat) Date: Sun, 16 Feb 2020 17:45:58 -0500 Subject: [COFF] Fwd: Old and Tradition was [TUHS] V9 shell In-Reply-To: References: <20200212030152.GJ852@mcvoy.com> Message-ID: On 2/16/2020 5:10 PM, Clem Cole wrote: > This was how I (and many others) learn about interpolation I learned about interpolation in either middle school or high school math. And used it many times in video games I had my hands in. I was a year or two ahead (depending on which year) in math. Create an array (or a cache at startup) with all the logs I needed, and then interpolate on the fly. And do the reverse for the alog(). Quite handy. As for slide-rules, I remember my father had one, and used it regularly. I never even looked at it. He died when I was 16. A few years later, I took it out of it's case, looked at it, and thought "ah! logs". I had never known what a slide-rule was. And I was born in 1965 ;) They certainly didn't teach us about slide rules in school. ak PS: Take the log of a number, divide by two, take the alog() and get the sqrt(). Divide by 3, cube root, etc. I was impressed, to say the least. -------------- next part -------------- An HTML attachment was scrubbed... URL: