The cone is easy to make by just using a revolve feature. But the ice cream on top is hard to make. I created a helix path and tried to use sweep but it didn't turn out pretty at all. Any suggestions will be greatly appreciated!
Sweep the cone, revolve a closed sketch of an arc with a line thru the center for the scoop of ice cream.
Here's a link to another thread that provides a solution to your helical soft serve icecream top:
PS, I suppose I should close with "Enjoy"
The ice cream nozzle is circular, but, as we all know, the ice cream flattens on itself. It doesn't remain tangent to itself
Unlike the post link above, I'd model a constant ice cream diameter, since, like the ice cream angle, the necking up & down of the ice cream diameter from the nozzle is too operator dependent to trouble with (at least for now).
Since the ice cream flattens on itself, the sweep profile can't just be a circle for it to match what we're used to seeing because, as I'm sure you know, the sweep would be self-intersecting and tangent circles wouldn't look "right".
So I think for your sweep profile, a circle with an arc (right of center) cut out of it would look/work best.
The arc notch (of the same diameter plus a small clearance to avoid intersecting) would have to be coordinated with the helix taper for the angle, pitch and slight offset to avoid intersecting.
I suggest using equations to drive the profile sketch and the sweep helix parameters.
The down side to this profile is at the top, the arc notch shows at the end of the sweep.
To remedy this, I'd sweep a (full) circle from the top of the sweep back down the helix until the the arc notch is covered (& so it doesn't intersect itself).
But I'd probably do this after I had the top end of the ice cream pointing up and on center (see next paragraph).
To finish the top, I'd add a loft from the top (full) circle to a small circle (or a point) on the cone's centerline, along an arc path.
A centerline loft would work for this, but if you select "normal to profile" for your start/end conditions, I think it will arc nicely for you w/o having to create a guide curve or centerline path.
Perhaps you can add this arc to the helix so the first sweep ends pointing up and centered on the cone's centerline. Then add your downward sweep.
To finish the bottom, I'd extrude cut across all of the bottom constrained to the center of the starting circle.
I'd add a ref geom point to the center of the start circle and horizontally related a cutting rectangle to it, than cut through all, both ways.
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