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Joined 2 years ago
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Cake day: June 13th, 2023

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  • I understand why you feel that way, and I’m certainly not trying to persuade you that you should feel optimistic about the world. It sounds like giving up hoping might be a thing that helps you to cope with the awfulness of the world — it’s reasonable to want to shield oneself from inevitable disappointment.

    I think that at the core of my own resolve to keep resisting terrible things is my sadness at how it’s not helpful to try to persuade people like you that things are worth fighting for. I think that, at my core, I agree with you. We’re both so jaded by what we’ve seen that it’s hard to imagine anything better. To some extent though, I don’t need to — my own coping mechanism is to hold onto the abstract hope of future people being able to effect change (and to think in terms of how I can best set the groundwork for them). Effectively, I am setting aside the question of whether people are worth the effect now, and imagining a future where people are worth the effort.

    I recognise that it’s irrational, but it helps me to get by — in terms of my own life, I’ve found it’s a mindset that helps me to grow in a way that I like, so it’s a useful guiding principle if nothing else. I emphasise again though, I’m not trying to persuade you of anything. There is so much awfulness in the world that I’m just glad that you’ve been able to continue existing, even if you feel hopeless about things.


















  • You’re right that I didn’t sufficiently consider the “was” in that sentence. Perhaps there’s something I’m missing though, because I haven’t seen anything that would suggest X is left. When I put my right hand in the position indicated in the OP, my index finger (Y) points upwards, with my thumb (X) pointing right, making an L shape. My middle finger (z) comes out towards me.

    However, most of my experience with coordinate systems is with abstract, mathsy stuff, and I don’t have much experience with any of these softwares; there may be something obvious that I’m missing.


  • I don’t think that’s correct. Here’s a drawing I did when trying to get my head around this.

    drawing

    I find that trying to make sense of terms like “to the left” tricky when we can rotate the directional cube any way we want. For example, in my drawing for “Y-up, left handed”, the red X axis is pointed leftwards. However, we could rotate the unit vector cube so that the X axis is pointed right, and the Y axis is pointing up (i.e. the orientation we’re most familiar with for 2D graphs). The Z axis would then be pointing away from us, into the plane of the paper/screen.

    In contrast, if we oriented the Y-up right-handed cube in the same way, then the Z axis would be oriented as if to come out of the plane of the screen/page, towards us.

    These distinctions only matter when we add a third dimension, so the left or right handedness is basically a question of "when we add the third axis to a 2D square made by the other two axes, does the third axis come towards us or away from us? I apologise if this hasn’t made things any clearer — I am able to make things make sense by imagining the rotations in my head, but not everyone is able to visualise them like that.