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QUESTION
I'm trying to build a Flutter Web version of the threejs Periodic Table Helix view (see here: https://mrdoob.com/lab/javascript/threejs/css3d/periodictable/ and click on "Helix")
Currently, I place all the element tiles in a stack, and position and rotate them with matrix transformations. See below code:
...ANSWER
Answered 2021-Mar-04 at 16:08So I found a solution. It's not perfect, but it works so far.
The idea is to use a Flow() widget. In the children widgets, where I'd normally build them, I instead stored their transformations in a map. Then, in the flow delegate function, access these transformations, calculate the z coordinate of each widget after transforming (row 3, column 3 (1 indexed) in the transformation matrix). Sort the widgets by z coordinate, and then paint them on screen in that order.
Here is the code for the same:
The part with the root Flow widget:
QUESTION
I've just started learning about Three.js and I'm currently experimenting with the css3d - periodic table demo. Within the demo, I want an extra sphere object in the center of the sphere periodic table added but I can't figure out how. Is there maybe someone that can help me?
...ANSWER
Answered 2020-Oct-19 at 12:03Adding a sphere mesh into a sphere of CSS3DObject
s is problematic because WebGL and HTML/CSS elements are rendered and sorted independently. Meaning the element labels will still be visible even when the sphere mesh is in front of them. This is demonstrated by the following example which is just an enhanced version of the official demo.
https://jsfiddle.net/dvop2wrb/
The basic idea is to create two renderers and place their domElement
properties on top of each other like so:
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