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116 lines
2.6 KiB
Python
116 lines
2.6 KiB
Python
from netgen.geom2d import *
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import pytest
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import math
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from pytest import approx
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from pytest_check import check
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def check_area(geo, area):
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if isinstance(geo, Solid2d):
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g = CSG2d()
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g.Add(geo)
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geo = g
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m = geo.GenerateMesh(maxh=0.2)
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ngs = pytest.importorskip("ngsolve")
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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with check: assert ngs.Integrate(1.0, mesh) == approx(area)
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def test_two_circles():
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c1 = Circle(center=(0,0), radius=1)
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c2 = c1.Rotate(45)
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s = c1*c2
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geo = CSG2d()
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geo.Add(s)
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m = geo.GenerateMesh()
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assert len(m.Elements2D()) > 0
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ngs = pytest.importorskip("ngsolve")
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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assert ngs.Integrate(1.0, mesh) == approx(math.pi)
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ngs.Draw(mesh)
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def test_two_edge():
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s = Solid2d( [(-1,0), cp(0,1), (1,0), cp(0,2)] )
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geo = CSG2d()
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geo.Add(s)
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m = geo.GenerateMesh()
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assert len(m.Elements2D()) > 0
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ngs = pytest.importorskip("ngsolve")
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g = geo.GenerateSplineGeometry()
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ngs.Draw(g)
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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ngs.Draw(mesh)
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def test_trig_and_circle():
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g = CSG2d()
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trig = Solid2d( [(0,0), (1,1), (-1,1) ] ).BC("diamond")
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circle = Circle( center=(0,0.101), radius=0.1).BC("circle") # TODO: Failing with center=(0,0.1)
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d = trig-circle
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g.Add(d)
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g.Add(circle)
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m = g.GenerateMesh(maxh=0.1)
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assert len(m.Elements2D()) > 0
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ngs = pytest.importorskip("ngsolve")
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geo = g.GenerateSplineGeometry()
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ngs.Draw(geo)
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mesh = ngs.Mesh(m)
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mesh.Curve(3)
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ngs.Draw(mesh)
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def test_circle_plus_rect():
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circle = Circle( center=(0,0), radius=1 )
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rect = Rectangle( pmin=(-0.5,0.0), pmax=(0.5,0.5) )
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geo = CSG2d()
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geo.Add(circle+rect)
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m = geo.GenerateMesh(maxh=0.2)
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ngs = pytest.importorskip("ngsolve")
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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assert ngs.Integrate(1.0, mesh) == approx(math.pi)
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def test_circle_plus_rect1():
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circle = Circle( center=(0,0), radius=1 )
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rect = Rectangle( pmin=(-0.5,-0.5), pmax=(0.5,0.5) )
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geo = CSG2d()
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geo.Add(circle+rect)
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m = geo.GenerateMesh(maxh=0.2)
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ngs = pytest.importorskip("ngsolve")
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mesh = ngs.Mesh(m)
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mesh.Curve(5)
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assert ngs.Integrate(1.0, mesh) == approx(math.pi)
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def test_circle_and_rect():
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c = Circle(center=(0,0),radius=1)
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r = Rectangle((0,0),(1,1))
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pi = math.pi
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check_area(c-r, 3/4*pi)
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check_area(c*r, 1/4*pi)
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check_area(c+r, 3/4*pi+1)
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check_area(r*c, 1/4*pi)
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check_area(r+c, 3/4*pi+1)
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check_area(r-c, 1-1/4*pi)
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if __name__ == "__main__":
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test_two_circles()
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test_two_edge()
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test_trig_and_circle()
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