def layer(normal, offset1, offset2):
"""Generate a layer, i. e. a region of space between two planes.
If either offset is 0, the respective plane will contain the origin.
Otherwise, the plane will be translated by offset along the normal vector.
The normal vector needs not be normalized.
"""
return Layer(normal, offset1, offset2)
def test_equality(self):
# Same object
self.assertEqualToItself(Layer(X, 4, 5))
# Equal objects
self.assertEqual(Layer(X, 4, 5), Layer(X, 4, 5))
# Different objects
self.assertNotEqual(Layer(X, 4, 5), Layer(Y, 4, 5)) # Different normal
self.assertNotEqual(Layer(X, 4, 5), Layer(
X, 5, 4)) # Different offsets (even though equivalent)
# Equal objects from different specifications
self.assertEqual(Layer(X, 4, 5), Layer([1, 0, 0], 4,
5)) # Different normal
def test_to_scad(self):
self.ignore_scad_comments = True
# General case, with the normal vector in the Y/Z plane
self.assertEqual(
Layer([0, 1, 1], 2, 2.5).to_scad(),
ScadObject(
"rotate", None, [('a', 45.0), ('v', [-1.0, 0.0, 0.0])], [
ScadObject("translate", [[0, 0, 2]], None, [
ScadObject(
"translate", [[-infinity / 2, -infinity / 2, 0]],
None, [
ScadObject("cube", [[infinity, infinity, 0.5]],
None, None)
])
])
]))
def test_layer_generators(self):
self.assertEqual(layer(X, 1, 2), Layer(X, 1, 2))
def test_construction(self):
# Valid
with self.assertNothingRaised():
Layer(Vector(1, 2, 3), 0, 5)
with self.assertNothingRaised():
Layer(Vector(1, 2, 3), 5, 0)
with self.assertNothingRaised():
Layer(Vector(1, 2, 3), 4, 5)
with self.assertNothingRaised():
Layer([1, 2, 3], 4, 5)
# Zero size
with self.assertWarnsRegex(UserWarning, r'offsets are equal'):
Layer(X, 4, 4)
# Invalid
with self.assertRaises(ValueError):
Layer(Vector(0, 0, 0), 4, 5) # Zero normal
with self.assertRaises(TypeError):
Layer(Vector(1, 2, 3), "0", 5)
with self.assertRaises(TypeError):
Layer(Vector(1, 2, 3), 0, "5")
with self.assertRaises(TypeError):
Layer(Vector(1, 2, 3)) # Offsets missing
with self.assertRaises(TypeError):
Layer(Vector(1, 2, 3), 4) # Offset missing
with self.assertRaises(TypeError):
Layer(1, 4, 5) # Wrong type
def test_str(self):
self.assertStr(Layer(X, 2, 3),
"Layer with normal <1, 0, 0> from 2 to 3")
def test_repr(self):
self.assertRepr(Layer(X, 2, 3), "Layer(Vector(1, 0, 0), 2, 3)")