Pyclipper/Clipper: Intersection of Polylines with Polygon Edge
If I want to clip the intersections between evenly spaced Polylines and a closed rectangle Polygon, the outermost Polylines coincide with the edges of the Rectangle.
Polylines Intersection with Rectangle Polygon(Green: Clip, Black: Subject, Red: Solution)
When the Polylines intersect the rectangle regularly, the solution provides, as supposed, the two intersecting points. However, in the case where the Polyline coincides with the edge of the Polygon, the solution is empty. Is there a way to retrieve the solution at the edges?
import numpy as np
import pyclipper
clip = np.asarray([(0, 0), (10, 0), (10, 10), (0, 10), (0, 0)])
pc = pyclipper.Pyclipper()
pc.AddPath(clip, pyclipper.PT_CLIP, True)
pathlist =
for y in np.linspace(0, 10, 11):
path = ((-1, y), (11, y))
pathlist.append(path)
pc.AddPaths(pathlist, pyclipper.PT_SUBJECT, False)
solutions = pc.Execute2(pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD)
for solution in solutions.Childs:
contour = np.asarray(solution.Contour)
python polygon intersection clipperlib pyclipper
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
add a comment |
If I want to clip the intersections between evenly spaced Polylines and a closed rectangle Polygon, the outermost Polylines coincide with the edges of the Rectangle.
Polylines Intersection with Rectangle Polygon(Green: Clip, Black: Subject, Red: Solution)
When the Polylines intersect the rectangle regularly, the solution provides, as supposed, the two intersecting points. However, in the case where the Polyline coincides with the edge of the Polygon, the solution is empty. Is there a way to retrieve the solution at the edges?
import numpy as np
import pyclipper
clip = np.asarray([(0, 0), (10, 0), (10, 10), (0, 10), (0, 0)])
pc = pyclipper.Pyclipper()
pc.AddPath(clip, pyclipper.PT_CLIP, True)
pathlist =
for y in np.linspace(0, 10, 11):
path = ((-1, y), (11, y))
pathlist.append(path)
pc.AddPaths(pathlist, pyclipper.PT_SUBJECT, False)
solutions = pc.Execute2(pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD)
for solution in solutions.Childs:
contour = np.asarray(solution.Contour)
python polygon intersection clipperlib pyclipper
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31
add a comment |
If I want to clip the intersections between evenly spaced Polylines and a closed rectangle Polygon, the outermost Polylines coincide with the edges of the Rectangle.
Polylines Intersection with Rectangle Polygon(Green: Clip, Black: Subject, Red: Solution)
When the Polylines intersect the rectangle regularly, the solution provides, as supposed, the two intersecting points. However, in the case where the Polyline coincides with the edge of the Polygon, the solution is empty. Is there a way to retrieve the solution at the edges?
import numpy as np
import pyclipper
clip = np.asarray([(0, 0), (10, 0), (10, 10), (0, 10), (0, 0)])
pc = pyclipper.Pyclipper()
pc.AddPath(clip, pyclipper.PT_CLIP, True)
pathlist =
for y in np.linspace(0, 10, 11):
path = ((-1, y), (11, y))
pathlist.append(path)
pc.AddPaths(pathlist, pyclipper.PT_SUBJECT, False)
solutions = pc.Execute2(pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD)
for solution in solutions.Childs:
contour = np.asarray(solution.Contour)
python polygon intersection clipperlib pyclipper
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
If I want to clip the intersections between evenly spaced Polylines and a closed rectangle Polygon, the outermost Polylines coincide with the edges of the Rectangle.
Polylines Intersection with Rectangle Polygon(Green: Clip, Black: Subject, Red: Solution)
When the Polylines intersect the rectangle regularly, the solution provides, as supposed, the two intersecting points. However, in the case where the Polyline coincides with the edge of the Polygon, the solution is empty. Is there a way to retrieve the solution at the edges?
import numpy as np
import pyclipper
clip = np.asarray([(0, 0), (10, 0), (10, 10), (0, 10), (0, 0)])
pc = pyclipper.Pyclipper()
pc.AddPath(clip, pyclipper.PT_CLIP, True)
pathlist =
for y in np.linspace(0, 10, 11):
path = ((-1, y), (11, y))
pathlist.append(path)
pc.AddPaths(pathlist, pyclipper.PT_SUBJECT, False)
solutions = pc.Execute2(pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD)
for solution in solutions.Childs:
contour = np.asarray(solution.Contour)
python polygon intersection clipperlib pyclipper
python polygon intersection clipperlib pyclipper
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
edited Nov 24 '18 at 11:01
Matthieu Brucher
15.8k32141
15.8k32141
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
asked Nov 24 '18 at 10:50
Christoph BreuningChristoph Breuning
62
62
I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31
add a comment |
I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31
I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31
I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31
add a comment |
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I'm suffering the same problem here!
– banarni
Dec 5 '18 at 11:31