I can not understand it

sketchup

#1

Why does it happen?
Is there any practical use for this?


#2

It is just fun, i guess:

but seriously, i think you wiggle both cardinal points (top and bottom), they get bigger at the same time.


#3

Cardinal Points have super powers, this is one of them…

john


#4

It’s not only about cardinal points on an arc or circle circumference.
You can create smooth surfaces, although with not enough controle to be accurate.
Here you see a set of arc surfaces with one hidden line (marked yellow) selected and rotated about green direction:

Depending on which line is selected, and the rotation point and rotation axis, you’ll get quite different results.


#5

I think it’s a glitch with no practical use. The scale tool is much more accurate.
If you explode the circles, then it rotates the line (instead of increasing the circle’s radiuses).


#6

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