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123d design align12/28/2023 ![]() Then we turn the circle sector into a triangle by sketching the chord corresponding to its arc (by drawing a polyline that connects the arc’s endpoints) and deleting its arc (using the Trim tool from the Sketch menu, we could also delete it by simply selecting it and pressing the Del or Delete key). And we’re sketching just one half of that actual intended arc at first so we can nicely align the arc we actually do want.Īfter sketching the 45° arc, we turn it into a circle sector by sketching the radii that touch its endpoints (using the Polyline tool from the Sketch menu). Or thinner or thicker pillars in between the same number of triangular cut-outs. We don’t have to go with this particular angle, we could just as well pick a wider or narrower angle if we were going for fewer or more triangular cut-outs along the circumference of the pipe. This is actually half of the actual intended arc we are going for, which is 45°. For sketching the arc we use the ‘Two Point Arc’ tool, likewise from the Sketch menu. First approachĪfter sketching the profiles of the pipe segments we then sketch a circular arc which is 22.5° wide and concentric with the middle pipe profile sketch (with one endpoint on what, I believe, is the Y axis?). These represent cross-sections of the pipe segments we’re going to be extruding triangular cut-outs from (the first three methods for achieving the intended shape are subtractive). ![]() We begin by sketching some circles on the default sketch plane / ground plane (using the ‘Sketch Circle’ tool from the Sketch menu at the top of the 123D Design interface). In this first video, we go over the first 4 approaches one can employ when trying to achieve the shape described above. We’ll go over both methods in this article. We can either begin with a pipe and extrude triangular cut-outs from it by different means so that we are left with the pillars in between each triangular extrusion or we can begin with nothing and just create the pillars before capping them with a top and bottom ring which can then be continued into un-extruded lengths of pipe of any desired length. One is additive and the other is subtractive. Immediately, two completely different ways of how this can be accomplished come to mind. The shape we’ll be modelling is your basic pipe segment but with triangular cut-outs extruded from its surface along its circumference. Today we’re going to see how it’s possible to model a more challenging shape in several different ways, which each yields slightly different results. Following on from where we left off with our last article but in a slightly different vein.
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