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Cake day: March 8th, 2025

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  • daannii@lemmy.worldtoLemmy Shitpost@lemmy.worldProtip:
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    27 days ago

    Back in my hippie days, we would do a little trick. You get some hemp. Few beads. Whatever. Tie it around your big toe then loop it around your ankle. So it looks like you are wearing flip flops at a glance.

    Did it all the time.

    As a more informed person. I do not really recommend walking barefoot anywhere except a park or your own space. And beaches.

    Cause dogs literally pee on every surface that exists in a city.

    And also hepatitis.

    Glass. Other sharp things.

    Even if you have thick soles, they can take out gashes of it.

    And the sidewalk is hella hot in the summer.

    Go barefoot at your own risk. But know the risks. Mkay.?







  • Hey I’m a perception researcher.

    In the real world we call this visual angle or retina angle

    You can calculate the visual angle of an object based on its distance from the eye and dimensions.

    If you want to create another object that “looks” the same size but is at a different distance, you use the same formula but instead you input the distance and visual angle and then it gives you the new dimensions needed for both objects to “look” the same size. (Project into the retina at the same size)

    This is actually part of an experiment I did for my dissertation where two cylinders were shown to participants. One was 90cm away. The other 80cm. But the “looked” identical in size. (They had to tell me which was closer without size influencing their judgment).

    When it comes to movement. The math for this might be a little more tricky as I’m pretty sure it’s proportional changes.

    I’ll be honest, my knowledge of this is lacking (calculus). But I’m open to helping you figure it out.

    I also am not familiar enough with blender to help you do this on blender. Only in real life. I mostly use blender for sculpting 3d models for printing. So you would have to figure out how to translate my help to blender.

    Honestly this sounds like a pretty cool optical illusion.

    I do have an excel sheet I created that I put the formulas in that make it easy to make two objects at different distances have the same retina angle.

    So let’s say I have a cube that’s 2x2x2cm. And it’s 50cm away. I first calculate the visual angle of 2cm height at 50cm.

    Then I use this information and make it so the object would be at 100cm away. How big does the cube now need to be , to still have the same visual angle. ?

    My formula will tell you.

    If you are interested I can give it for you and explain how to use it.

    There are online calculators for visual angle but none let you use a secondary one to create a matching (in retina angle) item at a different distance. So mine will be very useful to you for that purpose.

    There is also some discrepancy issue with what is called lens length. And this factors heavily into virtual spaces.

    I’ll go into that later with you.

    People are influenced by slight changes in size.

    And bigger is interpreted in one specific way. “It’s closer”. Which in your situation would make the object appear to get closer to the camera. So this is actually a big deal to make sure it’s projected perfectly.

    Here is a photo depicting visual angle. Basically the big E and the smaller E that is closer will project at the same size. The small E that is farther will project smaller in angle than the same dimensions small E that’s closer.

    https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcQjwyDmu1E2UPMVdPzTO3IBUvzW-ieOmw580A&s=

    Another image. This shows how two objects that are the same dimensions will project different visual angles based on distance.

    https://cdn.cambridgeincolour.com/images/tutorials/wa_narrow-angle-of-view.png

    Here is a photo of the formula. And shows that both a human and the Eiffle tower can project at same size.

    https://i.ytimg.com/vi/83kLc5WkO6I/maxresdefault.jpg?sqp=-oaymwEmCIAKENAF8quKqQMa8AEB-AG-B4AC0AWKAgwIABABGGUgZShlMA8%3D&rs=AOn4CLD3d56taVe6fL3cI2jIf4VO4wroHw

    I don’t want to overload you with info. I’ll try to remember to check my Lemmy later. I’m also in the middle of moving but I’ll help if I can.

    Send me a DM if you want to chat more one on one.








  • Elon edited gork (twitter AI bot) at 3 am to make it say white Africans are fleeing genocide. But instead what happened is the AI bot comments on any posts (regardless of topic) basically saying white Africans are not being racial targeted or suffering from genocide. And specifically saying there is no evidence of genocide. Because there isn’t any.





  • I found fusion360 and blender to be best for me. Fusion made by same company as tinkercad.

    I tried freeCAD and had constant errors (like 20 at a time) and couldn’t figure out what was going on even tried googling. And that’s when I learned that’s just how it goes with that program.

    I like blender to make sculpted models. Tutorials and figuring things out myself was frustrating but now I have a decent grasp on the basics and I find it much easier to use and keep learning new things all the time with it.

    I’ve only used fusion for a few projects that required it and had to rely a lot on tutorial videos but I was able to do the modeling. I plan to learn more of it in the future but it’s pretty decent so far.

    I’ve not used any of the others you have listed.





  • I think he wants them out so that when he orders the military to round up trans, there won’t be any military personnel to object. But he’s stupid.

    Plenty of people will object regardless if they themselves are trans or not.

    This is trumps biggest weakness.

    He doesn’t understand empathy, solidarity, integrity. Because he has none.

    And he gets sidelined when others act on those values because he just can’t understand why anyone would stick their neck out for someone else.


  • Bambulab slicer is based on prusa but has more features like the plate one I mentioned. I also think it’s more user friendly.

    I do agree. Printer should be choose based on other factors but the slicer is just the cherry.

    Bambu printers are excellent.

    They are especially great for newbies. They just work. No tinkering. No replacing parts every few months.

    They also print faster and at a higher quality.