Stacked 3D Hex Bin Histograms

Community Help
1

https://my.compclassnotes.com/guest/9437/frame/embed

PLEASE ROTATE GENTLY and THERE IS A LAG of about 1-4 s

Wobbly 3D texture mapped stacked Hex Bin Histograms:

  1. Can we do this in Observable with better resolution?

  2. Each stack is texture map of Hex Bin geo-Histogram into a 3D rectangle, can we replace the texture map some sort of vector graphics??? I doubt but maybe someone knows how

  3. If possible in Observable could we still have the tool-tip pop up in 3D?

  4. Could we render without the lag?

Dara

2

Not really what you want - but similar: https://observablehq.com/@gordonsmith/untitled/2

3

Terrific, is the map tiled? Or it just looks that way.

Excellent and I will study and get back to you .

Dara

4

Hereā€™s a simple implementation using X3Dom:

Iā€™m aware that your interested in the images being generated dynamically. Iā€™m not sure how much of a drag on performance during loading that will be but rotation should be quite smooth.

5

Dang this is much better than mine on Wolfram Cloud!!!

I am going to fork your notebook and steal some code.

Letā€™s have a chat

Dara

1 Like
6

Dear Mark can you show me how to control the opacity of the texture maps?

Thanx

7

That is trickier since the image itself really needs to have some level of transparency, in addition to the X3Dom object. Thatā€™s easy enough to do on the Mathematica side with a command like

imageOut = SetAlphaChannel[imageIn, 0.4]

Using that, I made a first pass at your request by adding opacity to all the stacked hex images:

Technically, that satisfies your request but Iā€™m guessing you want the ability to choose which map is displayed while dimming the others? That would be doable, but it would require a bit more work still. Weā€™d obviously need two images for for each map - a transparent one and an opaque one. In addition, weā€™d have to fiddle with the so-called z-index of each slice because I donā€™t believe that X3Dom automatically puts the opaque object on top - that is, transparent objects can sometimes still obscure objects behind.

Also, itā€™s worth mentioning that weā€™d probably not be able to do a smooth transition from opaque to transparent without a whole range of corresponding images. I doubt thatā€™s a big deal, though.

8

No need right now for any such fancy app:

Just show me to make the transparencies brighter

9

I think thatā€™s just a function of the level of opacity in the underlying image. Have another look now, I replaced the top two slices with images of higher opacity. I did just two so that you can easily see the difference.

Of course, there is a trade off here - more transparency implies less visibility. :slight_smile:

10

Mark the overlapping regions get brighter than dimmer, something might be backwards?

11

Thanx Mark it looks better,

12

The very last version is fantastic.

Letā€™s close this for now, I need to get some new data to show you.

Dara