techhub.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A hub primarily for passionate technologists, but everyone is welcome

Administered by:

Server stats:

4.7K
active users

#sweepOneRail

0 posts0 participants0 posts today
Splines<a href="https://pixelfed.social/discover/tags/IonicColumn?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#IonicColumn</a> <a href="https://pixelfed.social/discover/tags/Flutes?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#Flutes</a><br> <br> In <a href="https://pixelfed.social/p/Splines/799864068250003272" rel="nofollow noopener" target="_blank">https://pixelfed.social/p/Splines/799864068250003272</a>, I mentioned rounding off the radius of the bottom circle, but you don't have to. <a href="https://pixelfed.social/discover/tags/CAD?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#CAD</a> tools are perfectly happy working with 15.0728 or even higher precision as they are with 15.<br> <br> After placing the two circles as described in that post, use the full <a href="https://pixelfed.social/discover/tags/primaryProfileCurve?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#primaryProfileCurve</a> of the shaft from <a href="https://pixelfed.social/p/Splines/791794072490907090" rel="nofollow noopener" target="_blank">https://pixelfed.social/p/Splines/791794072490907090</a> as a <a href="https://pixelfed.social/discover/tags/sweepingRail?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sweepingRail</a> and the two circles for the flutes as the <a href="https://pixelfed.social/discover/tags/sweepingCurves?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sweepingCurves</a> and <a href="https://pixelfed.social/discover/tags/sweepOneRail?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sweepOneRail</a> for the body of a single shaft. Close <a href="https://pixelfed.social/discover/tags/planarHoles?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#planarHoles</a> on both ends to get an <a href="https://pixelfed.social/discover/tags/airtight?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#airtight</a> solid.<br> <br> Then draw a sphere at the center of the top circle using the same radius as the circle, and perform a <a href="https://pixelfed.social/discover/tags/booleanUnion?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#booleanUnion</a> between the sphere and the flute body.<br> <br> If you want a round bottom for the flute, repeat the sphere at the center of the larger circle using the same radius (15.0 or 15.0728) and perform another boolean union to get one flute.<br> <br> Switch to the top view and make 24 copies of the flute (including the original) centered at the column axis and <a href="https://pixelfed.social/discover/tags/group?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#group</a> the 24 flutes.<br> <br> Finally, perform a <a href="https://pixelfed.social/discover/tags/booleanDifference?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#booleanDifference</a> with the flutes group on a copy of the solid <a href="https://pixelfed.social/discover/tags/unadornedShaft?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#unadornedShaft</a> to get a fluted variant.<br> <br> The result is a column shaft with flutes carved out. Save the flutes separately for future reuse.<br> <br> This concludes the entire <a href="https://pixelfed.social/discover/tags/IonicOrder?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#IonicOrder</a>, including all <a href="https://pixelfed.social/discover/tags/decorativeElements?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#decorativeElements</a>.<br> <br> Now we pause and reflect: The whole exercise seemed like one of <a href="https://pixelfed.social/discover/tags/art?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#art</a> and <a href="https://pixelfed.social/discover/tags/sculpture?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sculpture</a>. Where is the <a href="https://pixelfed.social/discover/tags/architecture?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#architecture</a> in all of this?<br> <br> Without a ceiling or a roof, there is no building. Without additional columns or walls, there is no ceiling. So, while we have completed the Ionic Order itself, we only have the first <a href="https://pixelfed.social/discover/tags/buildingBlock?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#buildingBlock</a> — a single column.<br> <br> Next step is to repeat the columns to create a <a href="https://pixelfed.social/discover/tags/colonnade?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#colonnade</a>, which together with supporting walls or additional colonnades can support a ceiling.<br> <br> Just like with everything else in design, there are rules of proportion for <a href="https://pixelfed.social/discover/tags/intercolumniation?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#intercolumniation</a>, or space between columns.
Splines<a href="https://pixelfed.social/discover/tags/IonicVolutes?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#IonicVolutes</a> are the sinews of <a href="https://pixelfed.social/discover/tags/IonicScrolls?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#IonicScrolls</a>. Without <a href="https://pixelfed.social/discover/tags/volutes?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#volutes</a>, there would be scrolls, but not <a href="https://pixelfed.social/discover/tags/Ionic?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#Ionic</a> Scrolls. Each scroll starts with a volute in front, modulates through as many as six volutes of different shapes and sizes as it reached the back, with the scroll surface closely hugging the volutes at each contact point in ALL 3 dimensions. This is a key point to remember before we start <a href="https://pixelfed.social/discover/tags/reverseEngineering?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#reverseEngineering</a> the first <a href="https://pixelfed.social/discover/tags/primaryProfileCurves?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#primaryProfileCurves</a> from old image scans.<br> <br> This diagram shows the <a href="https://pixelfed.social/discover/tags/scaffolding?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#scaffolding</a> we will construct using straight lines and rectangles, first in 2 dimensions, then place them front-to-back in 3 dimensions using precise markers, and finally scale and superimpose the volutes on this scaffolding.<br> <br> All of this will be done before we derive the primary profile curves from the image scans.<br> <br> How did I know about this scaffolding? I didn't. It is not documented anywhere that I'm aware of. I developed this after years of striving to derive the correct shape, and I hope that there are people who can still "see" things I might have missed and help improve the design.<br> <br> So, the actual process went like this: I drew outlines from 2D image scans in the top view, getting close to <a href="https://pixelfed.social/discover/tags/Vignola?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#Vignola</a>'s detailed sketches. Then, I did the same thing with image scans in the side view, and I found that the designs didn't line up.<br> <br> After several iterations, I got the designs to line up in both views, and it was obvious that the bell shape of the scroll would follow the large volute in the front.<br> <br> So, I used the large volute as a "rail" and tried to sweep the primary profile curves on one rail. Big mistake! The undulating shapes of the primary profile curves wobbled wildly on the single rail and the middle, 3/4, and back of the scroll were twisted out of shape!<br> <br> Instead of trying to <a href="https://pixelfed.social/discover/tags/sweepOneRail?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sweepOneRail</a>, I decided to clamp down wobbling with another operation called <a href="https://pixelfed.social/discover/tags/sweepTwoRails?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#sweepTwoRails</a>, using volutes at both front and back ends as rails with less wobbling.<br> <br> You will need a <a href="https://pixelfed.social/discover/tags/CAD?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#CAD</a> tool to practice.