<div dir="auto"> Vince, we can go for lowest hanging fruit first (meshes to STL, which i have somewhat done), and then proceed to more abstract geometry (spheres, cones, cylinders, extrusions, 2D, NURBS). I am particularly interested in converting spheres to other shapes.</div><div dir="auto"><br></div><div dir="auto">But yeah, NURBS does need to be done in X3DOM, it appears in the wish list.</div><div dir="auto"><br></div><div dir="auto">I’m not pursuing browser implementations at this time, initial focus will be on nodejs, ES6, then probably TypeScript. Later, I will probably port to X3DJSONLD for browser implementations. Particularly, i would like for someone to review early code for correctness.</div><div dir="auto"><br></div><div dir="auto">Have you looked at brython in the browser?</div><div dir="auto"><br></div><div dir="auto">There is a good video on NURBS from Bill Joy from UC Davis describing NURBS algorithms. Thumbs up, and free!</div><div dir="auto"><br></div><div dir="auto">Oh, i like to think of myself as a high-powered programmer ;) who stayed up too many late nights (think of the opposite of Ben Franklin’s quote). I took all available 3D computer graphics courses at my school (1 undergraduate 2 or so graduate courses). Of course, you probably don’t want me programming radiosity or the rendering equation at this point in my life. I’m not interested in programming lighting equations, just pure geometry. People like Holger and Yvonne have better shading skills.</div><div dir="auto"><br></div><div dir="auto">And yes, i have experience tessellating spheres, the way i think of it is a NxN grid of triangles. (breaking the quadrilaterals into 2 triangles), then “wrapping” the grid around a “sphere” and offsetting the vertices in the vertex shader. However, grid for spheres produced from Blender are better than mine and we could probably export a sphere from that and convert to JSON. I feel confident taking abstract grids and converting them into shapes in a vertex shader.</div><div dir="auto"><br></div><div dir="auto">I’m not sure if you’re a JavaScript programmer or not. I have the goal of getting the JavaScript tessellation of a sphere in the new code in a couple of weeks.</div><div dir="auto"><br></div><div dir="auto">I understand that parametric modeling may be preferable, but my goal is STL, so i can 3D print my orbitals! </div><div dir="auto"><br></div><div dir="auto">Since I’ve tessellated spheres, I can probably do the cone and cylinder.</div><div dir="auto"><br></div><div dir="auto">I heard a rumor that the Castle Engine folks are working on a Pascal to WASM compiler of X3D, I’m giving them $5 a month. Maybe I should increase that.</div><div dir="auto"><br></div><div dir="auto">If you can create necessary geometry with opencascade, that would awesome. My first choice would be Blender.</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Tue, Dec 20, 2022 at 6:46 AM <a href="mailto:vmarchetti@kshell.com">vmarchetti@kshell.com</a> <<a href="mailto:vmarchetti@kshell.com">vmarchetti@kshell.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space">I do not think any of those libraries implement tesselation, if by tesselation you mean a function that you can pass a high-level description of a geometry , a description being a set of parameters for a primitive shape, or a larger set for a parametrically defined geometry such as NURBS, and that function returns some kind of mesh. It looks like you need some high powered code such as OpenCascade, C++ with Python binding available. I periodically try to explore whether WebAssembly is a viable way to make this code base work in the browser, with no positive results so far.<div><br></div><div>In short, I would judge that in-browser tesselation is not yet a useful option to pursue.</div><div><br></div><div></div></div></blockquote><div dir="auto">No browser pursuit right now, just STL. Let’s not kill my system yet, i need to save some money for a new one, a new car, etc.</div><div dir="auto"><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space"><div dir="auto">Vince Marchetti</div></div><div style="word-wrap:break-word;line-break:after-white-space"><div><br><div><br><blockquote type="cite"><div>On Dec 20, 2022, at 6:06 AM, John Carlson <<a href="mailto:yottzumm@gmail.com" target="_blank">yottzumm@gmail.com</a>> wrote:</div><br><div><div dir="ltr"><span id="m_-4173769188197228202cid:ii_lbw475o70"><image.png></span><br><div><br></div><div>The Stereo Lithography (STL) export converter from X3D JSON to STL looks like low hanging fruit. I just need to find some good tesselation code in ECMAScript. I already have a basic framework. Can anyone recommend A-Frame, Three.js, Babylon.js, Unity, X3DOM or X_ITE code for doing tesselation, or is it built into WebGL? Meanwhile, I will be working on meshes and creating a project, etc.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Dec 20, 2022 at 4:45 AM John Carlson <<a href="mailto:yottzumm@gmail.com" target="_blank">yottzumm@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Over the next several weeks, I will be ramping up for potential return to work, testing out CTS coping skills (laying on a different side, taking breaks), computer hygiene, sleeping hygiene etc.<div><br></div><div>My wife has given me the thumbs up to return to work remotely.</div><div><br></div><div>So if there's any X3D tasks, I should be able to pick some of them up, I will look at the wishlist.</div><div><br></div><div>BTW, has anyone attached Gmail to GPT-3?</div><div><br></div><div>Everyone have a merry xmas and happy new year.</div><div><br></div><div>Thanks!</div><div><br></div><div>John</div></div>
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