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test_read_write.py
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"""
Tests for the NURBS-Python package
Released under The MIT License. See LICENSE file for details.
Copyright (c) 2018 Onur Rauf Bingol
Tests file I/O operations. Requires "pytest" to run.
"""
import os
import pytest
from geomdl import BSpline, NURBS
from geomdl import multi
from geomdl import exchange
from geomdl import exchange_vtk
from geomdl import compatibility
from geomdl import operations
FILE_NAME = 'testing'
SAMPLE_SIZE = 25
@pytest.fixture
def bspline_curve3d():
""" Creates a B-Spline 3-dimensional curve instance """
curve = BSpline.Curve()
curve.degree = 2
curve.ctrlpts = [[1, 1, 0], [2, 1, -1], [2, 2, 0]]
curve.knotvector = [0, 0, 0, 1, 1, 1]
return curve
@pytest.fixture
def bspline_surface():
""" Creates a B-Spline surface instance """
surf = BSpline.Surface()
surf.degree_u = 2
surf.degree_v = 2
surf.ctrlpts_size_u = 3
surf.ctrlpts_size_v = 3
surf.ctrlpts = [[0, 0, 0], [0, 1, 0], [0, 2, -3],
[1, 0, 6], [1, 1, 0], [1, 2, 0],
[2, 0, 0], [2, 1, 0], [2, 2, 3]]
surf.knotvector_u = [0, 0, 0, 1, 1, 1]
surf.knotvector_v = [0, 0, 0, 1, 1, 1]
return surf
@pytest.fixture
def nurbs_surface():
""" Creates a NURBS surface instance """
surf = NURBS.Surface()
surf.degree_u = 2
surf.degree_v = 2
surf.ctrlpts_size_u = 3
surf.ctrlpts_size_v = 3
surf.ctrlpts = [[0, 0, 0], [0, 1, 0], [0, 2, -3],
[1, 0, 6], [1, 1, 0], [1, 2, 0],
[2, 0, 0], [2, 1, 0], [2, 2, 3]]
# use the auto-generated weights vector
surf.knotvector_u = [0, 0, 0, 1, 1, 1]
surf.knotvector_v = [0, 0, 0, 1, 1, 1]
return surf
@pytest.fixture
def nurbs_surface_decompose():
""" Creates a NURBS surface instance (decomposable) """
surf = NURBS.Surface()
surf.degree_u = 2
surf.degree_v = 2
surf.ctrlpts_size_u = 3
surf.ctrlpts_size_v = 4
surf.ctrlpts = [[0, 0, 0], [0, 1, 0], [0, 2, -3], [0, 3, 7],
[1, 0, 6], [1, 1, 0], [1, 2, 0], [1, 3, 8],
[2, 0, 0], [2, 1, 0], [2, 2, 3], [1, 3, 7]]
# use the auto-generated weights vector
surf.knotvector_u = [0, 0, 0, 1, 1, 1]
surf.knotvector_v = [0, 0, 0, 0.5, 1, 1, 1]
return surf
# Tests if the .obj file exists
def test_export_obj_single(nurbs_surface):
fname = FILE_NAME + ".obj"
nurbs_surface.sample_size = SAMPLE_SIZE
exchange.export_obj(nurbs_surface, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .off file exists
def test_export_off_single(nurbs_surface):
fname = FILE_NAME + ".off"
nurbs_surface.sample_size = SAMPLE_SIZE
exchange.export_off(nurbs_surface, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .stl file exists
def test_export_stl_single(nurbs_surface):
fname = FILE_NAME + ".stl"
nurbs_surface.sample_size = SAMPLE_SIZE
exchange.export_stl(nurbs_surface, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .stl file exists (ascii)
def test_export_stl_ascii_single(nurbs_surface):
fname = FILE_NAME + ".stl"
nurbs_surface.sample_size = SAMPLE_SIZE
exchange.export_stl(nurbs_surface, fname, binary=False)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .obj file exists
def test_export_obj_multi(nurbs_surface_decompose):
fname = FILE_NAME + ".obj"
data = operations.decompose_surface(nurbs_surface_decompose)
nurbs_multi = multi.SurfaceContainer(data)
nurbs_multi.sample_size = SAMPLE_SIZE
exchange.export_obj(nurbs_multi, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .off file exists
def test_export_off_multi(nurbs_surface_decompose):
fname = FILE_NAME + ".off"
data = operations.decompose_surface(nurbs_surface_decompose)
nurbs_multi = multi.SurfaceContainer(data)
nurbs_multi.sample_size = SAMPLE_SIZE
exchange.export_off(nurbs_multi, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .stl file exists
def test_export_stl_multi(nurbs_surface_decompose):
fname = FILE_NAME + ".stl"
data = operations.decompose_surface(nurbs_surface_decompose)
nurbs_multi = multi.SurfaceContainer(data)
nurbs_multi.sample_size = SAMPLE_SIZE
exchange.export_stl(nurbs_multi, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Tests if the .stl file exists (ascii)
def test_export_stl_ascii_multi(nurbs_surface_decompose):
fname = FILE_NAME + ".stl"
data = operations.decompose_surface(nurbs_surface_decompose)
nurbs_multi = multi.SurfaceContainer(data)
nurbs_multi.sample_size = SAMPLE_SIZE
exchange.export_stl(nurbs_multi, fname, binary=False)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_txt_curve(bspline_curve3d):
fname = FILE_NAME + ".txt"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_curve3d, fname)
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_import_txt_curve(bspline_curve3d):
fname = FILE_NAME + ".txt"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_curve3d, fname)
# Import text file
result = exchange.import_txt(fname)
res_array = []
for res in result:
res_array.append(res)
assert res_array == bspline_curve3d.ctrlpts
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_import_txt_surface1(bspline_surface):
fname = FILE_NAME + ".txt"
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_surface, fname, two_dimensional=False)
# Import text file
result = exchange.import_txt(fname, two_dimensional=False)
res_array = []
for res in result:
res_array.append(res)
assert res_array == bspline_surface.ctrlpts
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_import_txt_surface2(bspline_surface):
fname = FILE_NAME + ".txt"
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_surface, fname, two_dimensional=True)
# Import text file
result, size_u, size_v = exchange.import_txt(fname, two_dimensional=True)
res_array = []
for res in result:
res_array.append(res)
assert res_array == bspline_surface.ctrlpts
assert size_u == bspline_surface.ctrlpts_size_u
assert size_v == bspline_surface.ctrlpts_size_v
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_vtk_curve_ctrlpts(bspline_curve3d):
fname = FILE_NAME + ".vtk"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange_vtk.export_polydata(bspline_curve3d, fname, point_type="ctrlpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_vtk_surface_ctrlpts(bspline_surface):
fname = FILE_NAME + ".vtk"
bspline_surface.sample_size = SAMPLE_SIZE
exchange_vtk.export_polydata(bspline_surface, fname, point_type="ctrlpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_vtk_curve_evalpts(bspline_curve3d):
fname = FILE_NAME + ".vtk"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange_vtk.export_polydata(bspline_curve3d, fname, point_type="evalpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_vtk_surface_evalpts(bspline_surface):
fname = FILE_NAME + ".vtk"
bspline_surface.sample_size = SAMPLE_SIZE
exchange_vtk.export_polydata(bspline_surface, fname, point_type="evalpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_csv_curve_ctrlpts(bspline_curve3d):
fname = FILE_NAME + ".csv"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange.export_csv(bspline_curve3d, fname, point_type="ctrlpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_csv_surface_ctrlpts(bspline_surface):
fname = FILE_NAME + ".csv"
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_csv(bspline_surface, fname, point_type="ctrlpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_csv_curve_evalpts(bspline_curve3d):
fname = FILE_NAME + ".csv"
bspline_curve3d.sample_size = SAMPLE_SIZE
exchange.export_csv(bspline_curve3d, fname, point_type="evalpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
def test_export_csv_surface_evalpts(bspline_surface):
fname = FILE_NAME + ".csv"
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_csv(bspline_surface, fname, point_type="evalpts")
assert os.path.isfile(fname)
assert os.path.getsize(fname) > 0
# Clean up temporary file if exists
if os.path.isfile(fname):
os.remove(fname)
# Testing read-write operations in compatibility module
def test_compatibility_flip_ctrlpts2d_file1(bspline_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = FILE_NAME + "_out.txt"
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_surface, fname_in, two_dimensional=True)
compatibility.flip_ctrlpts2d_file(fname_in, fname_out)
assert os.path.isfile(fname_out)
assert os.path.getsize(fname_out) > 0
# Clean up temporary file if exists
if os.path.isfile(fname_in):
os.remove(fname_in)
os.remove(fname_out)
def test_compatibility_flip_ctrlpts2d_file2(bspline_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = FILE_NAME + "_out.txt"
with pytest.raises(IOError):
compatibility.flip_ctrlpts2d_file(fname_in, fname_out)
def test_compatibility_flip_ctrlpts2d_file3(bspline_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = ""
bspline_surface.sample_size = SAMPLE_SIZE
exchange.export_txt(bspline_surface, fname_in, two_dimensional=True)
with pytest.raises(IOError):
compatibility.flip_ctrlpts2d_file(fname_in, fname_out)
# Clean up temporary file if exists
if os.path.isfile(fname_in):
os.remove(fname_in)
def test_compatibility_generate_ctrlpts2d_weights_file(nurbs_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = FILE_NAME + "_out.txt"
nurbs_surface.sample_size = SAMPLE_SIZE
exchange.export_txt(nurbs_surface, fname_in, two_dimensional=True)
compatibility.generate_ctrlpts2d_weights_file(fname_in, fname_out)
assert os.path.isfile(fname_out)
assert os.path.getsize(fname_out) > 0
# Clean up temporary file if exists
if os.path.isfile(fname_in):
os.remove(fname_in)
os.remove(fname_out)
def test_compatibility_generate_ctrlptsw2d_file1(nurbs_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = FILE_NAME + "_out.txt"
fname_final = FILE_NAME + "_final.txt"
exchange.export_txt(nurbs_surface, fname_in, two_dimensional=True)
compatibility.generate_ctrlpts2d_weights_file(fname_in, fname_out)
compatibility.generate_ctrlptsw2d_file(fname_out, fname_final)
assert os.path.isfile(fname_final)
assert os.path.getsize(fname_final) > 0
# Clean up temporary file if exists
if os.path.isfile(fname_in):
os.remove(fname_in)
os.remove(fname_out)
os.remove(fname_final)
def test_compatibility_generate_ctrlptsw2d_file2(nurbs_surface):
fname_in = FILE_NAME + "_in.txt"
fname_out = FILE_NAME + "_out.txt"
fname_final = FILE_NAME + "_final.txt"
exchange.export_txt(nurbs_surface, fname_in, two_dimensional=True)
compatibility.generate_ctrlpts2d_weights_file(fname_in, fname_out)
compatibility.generate_ctrlptsw2d_file(fname_out, fname_final)
ctrlpts, size_u, size_v = exchange.import_txt(fname_final, two_dimensional=True)
ctrlptsw = compatibility.generate_ctrlptsw(ctrlpts)
res_array = []
for res in ctrlptsw:
res_array.append(res)
assert nurbs_surface.ctrlptsw == res_array
assert nurbs_surface.ctrlpts_size_u == size_u
assert nurbs_surface.ctrlpts_size_v == size_v
# Clean up temporary file if exists
if os.path.isfile(fname_in):
os.remove(fname_in)
os.remove(fname_out)
os.remove(fname_final)