def test_area_circle(self):
verts = []
numSegments = 1000
for idx in range(numSegments):
theta = 2 * pi * idx / numSegments
verts.append((sin(theta), cos(theta)))
self.assertAlmostEquals(area(verts), pi, places=4, msg="bad circle area")
verts.reverse()
self.assertAlmostEquals(area(verts), -pi, places=4, msg="bad clockwise circle area")
def test_constructor(self):
verts = [(-1, -2), (-3, +4), (+5, +6), (+7, -8)]
block = Block(gold, verts)
self.assertEquals(block.verts, verts, "bad verts")
self.assertEquals(block.material, gold)
expectedMass = gold.density * area(verts)
self.assertEquals(block.mass, expectedMass, "mass wrong")
self.assertNone(block.shape, "bad shape")
def __init__(
self, material, verts, offset=None, center=False):
assert_valid(verts)
self.verts = verts
if center:
self._centralize_verts()
if offset is not None:
self.verts = offset_verts(self.verts, offset)
self.material = material
self.mass = material.density * area(verts)
self.shape = None
def test_area_unit_square(self):
verts = [(0, 0), (0, 1), (1, 1), (1, 0)]
self.assertEquals(area(verts), 1.0, "bad unit square area")
verts.reverse()
self.assertEquals(area(verts), -1.0, "bad clockwise unit square area")
