- [Narrator] To analyze the shape of a curve as
well as the continuities of a curve
as they come to the end points of one another.
I have a tool called Porcupine curvature analysis
Select my porcupine curvature analysis,
Pick my curve and it sets up these quills with this green
envelope curve.
Now there's a couple of different types of analysis
there's radius and there's curvature.
Let me go ahead and increase the length of the quill.
One is inverse of the other
so what's going to happen is I'm measuring the radius.
Radius is typically used for longer,
broader, flatter curves.
Maybe you are doing something
across the hood of a car.
Something like that with big, long, broad strokes.
Radius os really good to use for those types of curves.
If you are using something with a lot tighter curvature
You may want to come in there
and actually use a curvature graph like this.
To get a good indication of what's happening
in the smaller tighter areas, as you can see.
I have a much larger exaggeration in the tighter radius.
Now again back to continuities.
The continuitie is displayed by this envelope curve.
As you can see this envelope curve doesn't touch
but the quills at the ends are parallels
so that means they're tangent.
And that's a great way verify that the curve that you are
looking at visual is tangent.
I'm going to select okay.
I'm going to double click on this styling filet
and I'm just going to change this to G-2.
Select okay now you can see those quills have changed.
And this is indicating at this point that this is a
G-2 or curvature continuity cause that green
envelope curve is now touching at those end points.
So the porcupine analysis is a very powerful tool that
allows you to visually see exactly what's happening with
your continuities on your curves.
So in this case all I did was take an intersection
curve through the part and then
analyzes that intersection curve or if I have curves
that I'm building
that I'm going to to eventually extrude out
or sweep along something.
I can use this tool and do the same thing.
Get the same type of analysis to make sure that
the curves that I'm using are perfect before I even create
surfaces off of them.