modeling discussion

 From:  Michael Gibson
5098.4 In reply to 5098.1 
Hi Burr, so if I understand ok now you are talking about angles measured on the scallop itself, right? [EDIT: didn't see your reply until after my post, but it turned out this was the right measurement so I think this will work for you]

So how about something like this - start by drawing in a line at a 30 degree angle like this - it doesn't matter how long this starting line is except make it big enough that it will stick a ways out past the side of the base cylinder that you are going to be cutting the cones out from:

Now you want to create a second line for the midpoint of the scallop. I think this is the one you want at 25 degrees, right? So the key thing is that this second line must be of the same length as the first one so either use the same numeric length for each of them or just make the second one by copying the first one and rotating it. To do the copy/rotate method, select it and then run Transform > Rotate, check the "make copies" button and type in -5 degrees as the rotation angle, using the top end as the rotation origin.

So now you've got 2 lines of the same length, one at 30 degrees and one at 25 degrees like so:

Now take the outer line and go to the top view and make a copy of it rotated at 45 degrees in the top view.

Then rotate the inner line by 22.5 degrees in the top view.

Now that those are rotated in the top view you've got 3 lines all the same length positioned like this:

These 3 equal length lines are now enough information to create a cone - first make the base of the cone by using Draw curve > Circle > 3 pts to make a circle that goes through the bottom ends of those lines like this:

Now you can draw a cone and snap the base point of the cone on to the center of the circle, place the radius snapped on to the circle, and the top point at the end - here I've spun around to the other side so you can see those 3 lines are right on the surface of the cone:

Hope that's what you are looking for!

- Michael