4 ms·

Neat. I did a related project a little while ago. I wasn't interested in how far I can see from everywhere, so much as what I can see from one place in particul

Neat. I did a related project a little while ago. I wasn't interested in how far I can see from everywhere, so much as what I can see from one place in particular. So in mine you can click on a spot and it draws black lines over any land that is occluded by terrain, within 100km. (But all with AI-generated JavaScript, not cool Rust and SIMD stuff) https://incoherency.co.uk/line-of-sight-map/ https://incoherency.co.uk/line-of-sight-map/

eitally 9mo ago
I am not sure if I'm experiencing what you describe. I just see a radiating circle of black lines, no matter where I click. I decided to click a local, notable "long line" viewpoint -- Lick Observatory outside San Jose. From here, on a clear day, you can see Half Dome in Yosemite, 120mi away. I still just see a black circle.
- arethuza 9mo ago
  I think the lines indicate areas that you can't see?
  - jychang 9mo ago
    It's buggy. Mission peak shows much of the bay area occluded.
- jstanley 9mo ago
  Are you standing on a raised platform when you see the Half Dome? This is what I get when I set the observer height to 20m, and increase the "max distance" to 300km (200km = ~124 miles so may not be enough). https://img.incoherency.co.uk/6478 https://img.incoherency.co.uk/6478 It's also possible that the half dome is too short and the sampling rate of the line-of-sight jumps over it!
- 1e1a 9mo ago
  It seems that sometimes it fails to load the height map, try reloading the page. You should see terrain shading if it's loaded properly.
nottorp 9mo ago
> But all with AI-generated JavaScript, not cool Rust and SIMD stuff Heh, I almost hit back at the "in Rust" mention. Would the end result have been different if it were done in python calling C libraries for performance? I strongly doubt it.
- spookie 9mo ago
  Isn't cross language function calling expensive? I assume it is significant.

eitally 9mo ago

I am not sure if I'm experiencing what you describe. I just see a radiating circle of black lines, no matter where I click. I decided to click a local, notable "long line" viewpoint -- Lick Observatory outside San Jose. From here, on a clear day, you can see Half Dome in Yosemite, 120mi away. I still just see a black circle.

arethuza 9mo ago
I think the lines indicate areas that you can't see?
- jychang 9mo ago
  It's buggy. Mission peak shows much of the bay area occluded.
jstanley 9mo ago
Are you standing on a raised platform when you see the Half Dome? This is what I get when I set the observer height to 20m, and increase the "max distance" to 300km (200km = ~124 miles so may not be enough). https://img.incoherency.co.uk/6478 https://img.incoherency.co.uk/6478 It's also possible that the half dome is too short and the sampling rate of the line-of-sight jumps over it!
1e1a 9mo ago
It seems that sometimes it fails to load the height map, try reloading the page. You should see terrain shading if it's loaded properly.

nottorp 9mo ago

> But all with AI-generated JavaScript, not cool Rust and SIMD stuff Heh, I almost hit back at the "in Rust" mention. Would the end result have been different if it were done in python calling C libraries for performance? I strongly doubt it.

spookie 9mo ago
Isn't cross language function calling expensive? I assume it is significant.