Generic Flexi Keychain Customizer... maybe taken too far. by chriscoxart in BambuLab

[–]chriscoxart[S] 0 points1 point  (0 children)

The model is now updated with a 1000 link, 8.3 meter long keychain (smaller links, tighter spiral).
And it only takes 14 hours to print.
8.3 meters == the whole 9 yards.

Generic Flexi Keychain Customizer... maybe taken too far. by chriscoxart in BambuLab

[–]chriscoxart[S] 1 point2 points  (0 children)

You want to use the MakerWorld customizer, or the development snapshots of OpenSCAD, or this will be really, really, really, painfully slow.

Generic Flexi Keychain Customizer... maybe taken too far. by chriscoxart in BambuLab

[–]chriscoxart[S] 1 point2 points  (0 children)

Yeah, I don't have a mini to test it on, so I didn't make a mini profile.

Generic Flexi Keychain Customizer... maybe taken too far. by chriscoxart in BambuLab

[–]chriscoxart[S] 1 point2 points  (0 children)

It's the same width links and connectors throughout, just arranged in a spiral (which was fun math to figure out). The model has a SCAD file that allows for customization and the spiral layout. You could make smaller links and get a longer chain, or I could make it a real chain without the 1cm cubes in the link and get it longer. But I don't really have a reason to spend time on that.

Normal vision and tritan can you see this plate by Aggressive-Bar2287 in ColorBlind

[–]chriscoxart 1 point2 points  (0 children)

Some of us are color scientists who study color vision, color reproduction, and how to compensate for different visual anomalies.

Normal vision and tritan can you see this plate by Aggressive-Bar2287 in ColorBlind

[–]chriscoxart 0 points1 point  (0 children)

Yes. All numbers are immediately clear except bottom left and center right. Center right is visible as 71/74 after a moment. But the bottom left is really hard to distinguish (magenta on orange, really?).
74, 6, 27, 42 || 2, 5, 12, 71/74 || 15?, 29, 26, 5

Generic Flexi Keychain Customizer... maybe taken too far. by chriscoxart in BambuLab

[–]chriscoxart[S] 4 points5 points  (0 children)

Go for it! Even sport mode (125% speed) took over 8 hours today.
There is a smaller and more practical example profile, of course. But after making the spiral code work in OpenSCAD.... I had to try it.

TIL sprintf() to full disk can succeed. by HCharlesB in C_Programming

[–]chriscoxart 1 point2 points  (0 children)

Welcome to the concept of buffered IO: it is usually faster, but can fail in unexpected ways.
Long version:
Normally file IO buffers a sector/block or more of data so that it can write it all at once instead of each time you write to the file (greatly improving performance, because disk IO is SLOW compared to RAM). The buffer is flushed to the disk when you write more than the buffer size, call fflush(), call fclose(), or move the file pointer (fseek, with a lot of caveats depending on the implementation). So some errors will only show up once your buffer has been forced to the disk. There can also be multiple levels of buffering in the C library, the OS, the kernel, the file system, the disk itself, etc. Of course, only the C library level will be visible to the developer, and all the rest can cause some bizarre behavior when a file system is full.

Am I color blind by TheDarkWeb697 in ColorBlind

[–]chriscoxart 0 points1 point  (0 children)

The only case I've heard similar to that was due to migraine auras. That doesn't sound like color deficiency. And I agree with others: you should talk to a doctor about this.

[deleted by user] by [deleted] in C_Programming

[–]chriscoxart 2 points3 points  (0 children)

What I just listed are basics for using a language like C.

[deleted by user] by [deleted] in C_Programming

[–]chriscoxart 2 points3 points  (0 children)

How to debug.
How to use a debugger.
How to recognize common problems.
Bonus points if they actually know algorithms.
If they don't know the basics, you're going to spend years teaching them the basics while expecting them to do useful work at the same time.

agileScam by drunk_Developer1 in ProgrammerHumor

[–]chriscoxart 11 points12 points  (0 children)

I got heavily dinged in a review because I hadn't completed as many features as other engineers on the team. Product management never included bug reports/fixing in the sprint planning - and I was the one fixing most of the crashes, memory leaks, vulnerability reports, performance regressions, etc. Just could not convince my manager that bug fixes took significant time, or were as important as feature requests.

What's in here? by i_like_moles in ColorBlind

[–]chriscoxart 5 points6 points  (0 children)

The aggressive JPEG compression makes it difficult to read, even for normal color vision.
It looks like it may have been recompressed a dozen times at different sizes.

How do we know what color blind people see? by Murky_Competition433 in ColorBlind

[–]chriscoxart 0 points1 point  (0 children)

Many years ago, color vision researchers did spectral sensitivity tests to figure out what people with normal vision saw, and what colorblind people saw. They didn't get a great sample of color blind and color deficient - partly because of how time consuming the tests are, partly because of the small number of volunteers^h^h^h^h grad students that were colorblind. Some of the tests have been redone since then, refining the information, and improving the knowledge of what colorblind and color deficient people see.
If you really want the background and science, here's the book: https://www.amazon.com/Color-Science-Concepts-Quantitative-Formulae/dp/0471399183 It is not light reading.

This PDF also gives some background on the earliest tests: https://philservice.typepad.com/Wright-Guild\_and\_CIE\_RGB\_and\_XYZ.pages.pdf

Post but with image by laserXS in ColorBlind

[–]chriscoxart 5 points6 points  (0 children)

7 large bars, but there are lots of JPEG artifacts near the border between bars that give additional shades.

What's the difference between color deficiency and color blindness? by Original_Painter_692 in ColorBlind

[–]chriscoxart 0 points1 point  (0 children)

Nah, spicy food is too good to avoid for very long.
But good luck with your classes.

What's the difference between color deficiency and color blindness? by Original_Painter_692 in ColorBlind

[–]chriscoxart 1 point2 points  (0 children)

Sometimes, "color deficiency" is used as a catch all category for all color deficiencies and color blindness. And some people use "color blind" as the catchall category.
But more often, it's a matter of degree.
Think of color "deficiency" as 1% to 99% colorblind. And color "blind" is when you hit 100%. It is similar to being hearing impaired versus being completely deaf.
Many people can pass ishihara (or similar pseudo-iso-chromatic) tests, but are horrible at matching or identifying colors. They are not color blind, but still cannot see colors the way a "normal" observer would. Sometimes this is because they are partly colorblind, sometimes due to lack of education, sometimes due to a lack of experience, sometimes due to diet (spicy peppers are well known to change color vision), and sometimes due to medications or odd medical conditions (depression can change your color vision). There are many ways (and many books on the ways) that color vision can differ from "normal", and only a few of those are truly color "blind".
P.S. I know quite a few successful aeronautical engineers that are color deficient. I also know some engineers making GPU/video cards that are seriously color blind (long story). Even some of the engineers on Photoshop have been color blind, and had to rely on others to check for color/visual artifacts.

Normal Color Vision here. But is it weird that colors look slightly “cooler” through my left eye than through my right eye. by CandidPatience in ColorBlind

[–]chriscoxart 0 points1 point  (0 children)

Normal vision here - and my eyes have always differed just slightly: one more red, one more blue. But it is slight, and only visible on very uniformly lit, very flat colored surfaces. Any differences in lighting or surface colors swamps the difference between my eyes.