In this step we will be creating a stool leg. Nothing too fancy, many of you would just use Cylinder solid, but hey, not me. I like to complicate things. Or simplify them? Judge for yourselves.
Before we even start creating the leg, we need to find the center of the seat. We will do it by creating a line underneath the seat. It is sort of diagonal line under the straight part of the seat (use End OSnap option):
Ok, now we need to create another line from the midpoint of this line, and make it long 7.5 units.
Ok, here is a trick you can use to make this line easy. Start the PolyLine (or Line) command and using Mid OSnap option, click on the Mid point on the diagonal line. That would be your start of the line. Best way is to click in the Perspective view. Now, while still in the command, you can go to other viewports, so go to Right viewport and using Ortho option in status bar you can easily make the line straight, but before you click for the other end of the line you need to input the 7.5 value in the command line to lock the length of the line. Then click on for the second end of the line, and press enter to finish the command.
We’ll move to the leg base now, and we will create a Circle with the center in the lower End of the 7.5 units long line. And for the radius we will use half of the 2.75 which is our width of the stool. Or simply use Perp Osnap option to snap to the end of the stool (or even, click on the Diameter option in the command line, and input 2.75):
Using FilletEdge command fillet the upper edge of the extruded circle by 0.05 units:
Using Near Osnap option, create a Point somewhere on the leg line setting the position where the width of the leg will change. As you know the leg is made out of two parts, actually two cylinders, both different radii.
Again, visually it doesn’t seem to be split, but if you click on each part you will see that it is now two separate lines. Just what we wanted.
Now, using Pipe command we will create “pipes” out of these two line parts. The lower pipe will have 0.2 as radius, and the upper one will have 0.08 as radius:
Again, with FilletEdge command fillet the upper edge of the lower cylinder with same radius of 0.05 units (you will see that Rhino remembers your dimensions for each command, like in this case for FilletEdge):
We’re done with the stool leg, now we just need to make a few minor detailes. So go to Right viewport and using Rectangle command create a rounded rectangle 0.2×0.08 with corner radii 0.02.
Using Mirror command we will mirror our rounded rectangle from the center of the leg cylinder:
Using ExtrudeCrv command you will extrude the two rectangles. Now, again, OSnap can help you out extrude this easily. But, you can just input 2.75 for extrusion distance as this is our stool width.I’ve snapped to the end of diagonal line:
Snapping to the end of stool’s leg line you will create a Circle with its center on the end line and 0.4 as radius:
Extrude that circle with ExtrudeCrv command down by 0.3 units. If you plan on inputing it in the command line make sure you put in the (-) minus sign so you go down:
Using Offset command we will offset the lower edge of this red cylinder and therefore create a circle which will be 0.1 units smaller than the cylinder:
Again, offset that circle inside by 0.2:
Using Move command from either Front or right viewport move it down by 0.5 units:
Now with Loft command create a surface between the two circles:
Ok, and with Cap command close this red surface into a solid. It will add caps top and bottom.
This is it. You’re done!