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"The program should, in some way, expand the concept of what computer paint programs are, as well as what mark making can be."

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Omar Rizwan @omar

feel like the older i get the more i'm like, nothing on the internet can be relied on to last at its original location, and people should copy and paste / blockquote as much as possible so that the information is more likely to survive in at least 1 place https://mastodon.coffee/@shammers/111574867456966246

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Omar Rizwan @omar

It was cool although I felt like the character who they put in a movie who
doesn't know anything so that the audience can listen to the other
characters explain everything to them 10:43 PM

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Omar Rizwan @omar

I've been getting back on the RFID train lately with pretty good results, feels like I've broken through where I was stuck on this refactor a couple months ago --

plot of rfid output (red lines showing how RN16 was parsed properly)

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Omar Rizwan @omar

https://www.cs.rpi.edu/~trink/Courses/RobotManipulation/lectures/lecture6.pdf

Why representing rotations is hard.

e Rotations do not commute.

e The topology of spatial rotations does not permit a smooth
embedding in Euclidean three space.

Lecture 6. Mechanics of Manipulation -

Choices

More than three numbers
e Rotation matrices
e Unit quaternions. (aka Euler parameters)
Many-to-one
e Axis times angle (matrix exponential)
Unsmooth and many-to-one
e Euler angles
Unsmooth and many-to-one and more than three numbers
e Axis-angle

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Omar Rizwan @omar

Rotations day today

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Omar Rizwan @omar

https://kd.hs-mainz.de/shop/the-worlds-writing-systems-poster/

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Omar Rizwan @omar

"The need for a fortran compiler was a big part of the original rationale for the divide of numpy and scipy when they replaced numeric. Numpy was meant to be the lighweight/core version of things, and scipy was the full-fledged environment."

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Omar Rizwan @omar

C10G in 2028?

The C10M problem

It's time for servers to handle 10 million simultaneous connections, don't you think? After all, computers now
have 1000 times the memory as 15 years ago when the first started handling 10 thousand connections.

Today (2013), $1200 will buy you a computer with 8 cores, 64 gigabytes of RAM, 10-gbps Ethernet, and a
solid state drive. Such systems should be able to handle:

- 10 million concurrent connections

- 10 gigabits/second

- 10 million packets/second

- 10 microsecond latency

- 10 microsecond jitter

- 1 million connections/second

Such systems already exist. We call them "hardware" or "devices". But in recent years, devices have become
just software running on general purpose computers. Rip open a network device and you might find a personal
computer inside. The limits of scalability aren't our hardware, but the software, specifically, the operating
system.

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Omar Rizwan @omar

`git instaweb --httpd=webrick`… neat

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Omar Rizwan @omar

woah -- it's like it's an intermingling of levels of abstraction (the world of display and pixels vs. the world of characters and text)

Function: pixel-fill-region start end pixel-width ¶
Most Emacs buffers use monospaced text, so all the filling functions (like fill-region) work based on the number of characters and char-width. However, Emacs can render other types of things, like text that contains images and using proportional fonts, and the pixel-fill-region exists to handle that. It fills the region of text between start and end at pixel granularity, so text using variable-pitch fonts or several different fonts looks filled regardless of different character sizes. The argument pixel-width specifies the maximum pixel width a line is allowed to have after filling; it is the pixel-resolution equivalent of the fill-column in fill-region. For instance, this Lisp snippet will insert text using a proportional font, and then fill this to be no wider than 300 pixels:

(insert (propertize
"This is a sentence that's ends here."
'face 'variable-pitch))
(pixel-fill-region (point) (point-max) 300)

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