trimesh/ section.py about trimesh HOT 4 CLOSED

Hey- the error you're getting is because the plane doesn't intersect the mesh. Rather than returning an empty Path3D object, a ValueError is raised. You can catch and ignore it by wrapping the section call in a try/except block:

    sections  = []

    for z in np.append(z_levels, 1000):
        # this will return a Path3D object, each of which will                    
        # have curves in 3D space                                                 
    try:
            sections.append(mesh.section(plane_origin = [0,0,z],
                                         plane_normal = [0,0,1]))
    except ValueError:
            print('Plane doesn\'t intersect mesh at {}'.format(z))

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Dear Michael,

thank you so much !

section.py works now for all the three direction ( x, y, z) .

I'm still in trouble to use correctly *trimesh/intersections.py .
*

Do you have an example how to use intersections.py.

Thank you very much.

Best regards

Johann*
*

**

Johann Kindlein MSc

Dorfstr. 145 a
21365 Adendorf
Germany

Tel: +4941317572040
Fax: +4941317574293

Am 13.10.2016 um 02:47 schrieb Michael Dawson-Haggerty:

Hey- the error you're getting is because the plane doesn't intersect
the mesh. Rather than returning an empty Path3D object, a ValueError
is raised. You can catch and ignore it by wrapping the section call in
a try/except block:

|sections = [] for z in np.append(z_levels, 1000): # this will return a
Path3D object, each of which will # have curves in 3D space try:
sections.append(mesh.section(plane_origin = [0,0,z], plane_normal =
[0,0,1])) except ValueError: print('Plane doesn't intersect mesh at
{}'.format(z)) |

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Hey Johann, glad its working for you. trimesh.intersections is just the module where the actual function doing the cross section lives, so using that would be exactly the same as doing mesh.section. I'm going to update the example and close this for now.

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Dear Michael,

please see attached the intersection lines for a anatomical surface.

The mesh lines at one intersection level are composed from multiple
lines ( with the end points).

Could you please help still with one point.

How I can get access to the points ( endpoints ) of the multiple lines
of a section.

I tryid different ways without success.

Thank you in advance.

Best regards

Johann

Johann Kindlein MSc

Dorfstr. 145 a
21365 Adendorf
Germany

Tel: +4941317572040
Fax: +4941317574293

Am 14.10.2016 um 04:48 schrieb Michael Dawson-Haggerty:

Hey Johann, glad its working for you. trimesh.intersections is just
the module where the actual function doing the cross section lives, so
using that would be exactly the same as doing mesh.section. I'm going
to update the example and close this for now.

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