#columnShaft

SplinesThe bottom 1/3 of the <a href="https://pixelfed.social/discover/tags/columnShaft?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#columnShaft</a> for an <a href="https://pixelfed.social/discover/tags/IonicColumn?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#IonicColumn</a> is a perfect cylinder. So the line below point B is a straight line. In <a href="https://pixelfed.social/p/Splines/791723063470910081" rel="nofollow noopener noreferrer" target="_blank">https://pixelfed.social/p/Splines/791723063470910081</a>, we blended the bottom end of the 60° arc and the top end of the long interpolated curve between points J and K. Now blend the bottom end of the interpolated curve and the top end of the straight line between points B and C to obtain the 3rd and final <a href="https://pixelfed.social/discover/tags/NURBS?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#NURBS</a> segment for the <a href="https://pixelfed.social/discover/tags/primaryProfileCurve?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#primaryProfileCurve</a> of the shaft. Just like there's a <a href="https://pixelfed.social/discover/tags/cavetto?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#cavetto</a> and <a href="https://pixelfed.social/discover/tags/fillet?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#fillet</a> near the <a href="https://pixelfed.social/discover/tags/neck?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#neck</a> of the shaft, there is a fillet and cavetto near the foot of the shaft. However, there is a subtle difference between the two. The cavetto near the neck is tangential to the blended <a href="https://pixelfed.social/discover/tags/NURBS?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#NURBS</a> curve that is not a straight line. The profile curve for the cavetto near the foot is tangential to a straight line. There is a special name for a cavetto that is tangential to a straight line or flat surface, like the two cavetto moldings in the <a href="https://pixelfed.social/discover/tags/dado?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#dado</a> of the <a href="https://pixelfed.social/discover/tags/pedestal?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#pedestal</a>. It's called a <a href="https://pixelfed.social/discover/tags/conge?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#conge</a>. Another alternate name for the cavetto molding is <a href="https://pixelfed.social/discover/tags/cove?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#cove</a>, which is evocative of "cave" because of its concave profile curve. Above the neck is a fillet 8 units tall and an <a href="https://pixelfed.social/discover/tags/astragal?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#astragal</a> 16 units tall that <a href="https://pixelfed.social/discover/tags/Scarlata?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#Scarlata</a> puts in braces in the column shaft section within his tables of <a href="https://pixelfed.social/discover/tags/VignolaProportions?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#VignolaProportions</a>, with a note saying they are not counted as part of the shaft but are accounted for as part of the <a href="https://pixelfed.social/discover/tags/capital?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#capital</a>. I decided to include the top fillet as part of the shaft and keep the astragal with the capital. It does not change the design or alter the proportions in any way, but the inclusion of the fillet makes it more practical for <a href="https://pixelfed.social/discover/tags/3DPrinting?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#3DPrinting</a> and <a href="https://pixelfed.social/discover/tags/CNCMilling?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#CNCMilling</a> of the neck. This concludes the profile curve for the shaft with a height of 291 parts or 2328 units + 8 for fillet. The column shaft is tapered in the upper 2/3 due to <a href="https://pixelfed.social/discover/tags/entasis?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#entasis</a> whose purpose is to make optical corrections to the shape of the column which, without correction, appeared concave near the top.

Ramesh #NotGoingBack⬆️ <a href="https://mastodonapp.uk/@Carlbovis" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Carlbovis</a> Convince me that classical <a href="https://mastodon.social/tags/architecture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#architecture</a> and <a href="https://mastodon.social/tags/design" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#design</a> were not influenced by <a href="https://mastodon.social/tags/nature" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#nature</a>. For context, compare the picture of <a href="https://mastodon.social/tags/ChaffinchWings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ChaffinchWings</a> and tail in the previous post to the <a href="https://mastodon.social/tags/volute" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#volute</a> and the <a href="https://mastodon.social/tags/frieze" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#frieze</a> in the sketch below which shows the classical <a href="https://mastodon.social/tags/Entablature" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Entablature</a>, <a href="https://mastodon.social/tags/Capital" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Capital</a>, and neck of the <a href="https://mastodon.social/tags/ColumnShaft" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ColumnShaft</a> in the <a href="https://mastodon.social/tags/IonicOrder" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IonicOrder</a>.

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#columnshaft