Bounding Planar Closed Curve/Polyline

Hey !

Is there any component that computes the optimal rectangle for a planar curve/polysurface, as the bounding box do w/ Breps but 1 dimension less ?

Actually, I tried with the bounding box but only problems came to myself.

Thx for your kind answers !

Replies to This Discussion

Permalink Reply by Joseph Oster on November 17, 2015 at 3:26pm

What do you mean by "optimal"? Minimum area? 'BBox' typically keeps its edges aligned to WorldXY so it's possible there might be a rectangle with a smaller area if it were rotated a bit.

Why did the 'BBox' fail? Post some code.

Works for me:

Permalink Reply by Joseph Oster on November 17, 2015 at 3:38pm

But as you can see, minimal area of the rectangle for this curve happens when the 'BBox' plane is rotated ~66 degrees:

Attachments:

bbox_2015Nov16a.gh, 9 KB

Permalink Reply by Mac Gros on November 18, 2015 at 2:33pm

You guessed rightly, i were searching for the minimum area but finally, i dont quite need this optimal rectangle.

Just a fitting one do the job in my case.

So, BBox problem : when your surface is worldXY no problem but there are some orientation you dont have an untrimmed srf, nor a flat box but a box.

I was almost writing a piece of C# when a friend reminded me the existence of "Plane Through Shape" (cutted banana)

Worked at work, 'll work at home

Thx again mister, have a nice evening !

Permalink Reply by Joseph Oster on November 18, 2015 at 5:05pm

There are many ways to create a reference plane for 'BBox'. Rotating a 'WorldXY' plane, a I did above, is one of them. It can be rotated using any arbitrary axis (or two!). Have fun.

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