vedo
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Published
20 hours ago •
marcomusy
marcomusy
Ribbon return a in-closed surface
I input two contours to Ribbon to generate a surface. The two contours are closed, but the Ribbon generated surface is not closed. The result is:
The red tube (green arrow) is the input contours, and we can see that the input contours are closed.
However, the Ribbon generated surface is not closed.
The code is:
contour1 = [
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[ -52.88783264160156 , -62.40203857421875 , 33.930017594805236 ] ,
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]
contour2 = [
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]
from vedo import *
ribbon = Ribbon(line1=contour1, line2=contour2)
show(ribbon, Tube(contour1, c='r'), Tube(contour2, c='r'))
Sorry for post such long data. Because I can not find a short data that show such bug. Other data is OK.
This problem really make me confuzed.
Your data contains something strange to me (you duplicated the last point)
The ribbon2 is made from a similar circles and it works fine...
from vedo import *
contour1 = np.array(list(reversed(contour1)))
contour2 = np.array(list(reversed(contour2)))
ribbon1 = Ribbon(contour1, contour2, closed=1)
ribbon1.c('k3').lighting('off')
contour1 = Circle(r=50).rotateZ(90).pos(-20,-60,33).points()
contour2 = Circle(r=50).rotateZ(90).pos(-20,-50,200).points()
ribbon2 = Ribbon(line1=np.array(contour1), line2=np.array(contour2), closed=True)
ribbon2.c('k5').lighting('off')
show([[ribbon1, ribbon1.labels('id')],
[ribbon2, ribbon2.labels('id')]],
N=2, axes=1,
)
I also feel very strange. Only some of my data show this in-closed surface, and most of my data is normal.
I don't know why it happen~~~
I'll classify it as bug for the moment. I will investigate a bit more if it can be due to vedo but so far it looks like it's probably not.
And the following code also show in-closed surface:
from vedo import *
ellip1 = Circle(pos=[0, 0, 0], c='r')
ellip2 = Circle(pos=[0, 0, 3], c='r')
ribbon = Ribbon(line1=ellip1, line2=ellip2)
show(ellip1, ellip2, ribbon)
