def test_constructor_applies_offset(self):
verts = [(-1, -2), (-3, +4), (+5, +6), (+7, -8)]
offset = (5, 6)
block = Block(gold, verts, offset)
expected = offset_verts(verts, offset)
self.assertEquals(block.verts, expected, "didnt apply offset")
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_add_to_body(self):
space = Space()
body = Body(10, 20)
verts = [(-1, -1), (-1, +1), (+1, +1), (+1, -1)]
offset = (1, 2)
block = Block(gold, verts, offset)
block.add_to_body(space, body)
self.assertEquals(type(block.shape), Poly, "didnt create shape")
self.assertEquals(block.shape.body, body, "didnt add shape to body")
shapeVerts = block.shape.get_points()
expected = [Vec2d(v) for v in offset_verts(verts, offset)]
self.assertEquals(shapeVerts, expected, "bad shape verts")
self.assertAlmostEquals(block.shape.friction, gold.friction,
msg="bad shape friction")
self.assertAlmostEquals(
block.shape.elasticity, gold.elasticity,
msg="bad shape elasticity")
spaceShape = [s for s in space.shapes][0]
self.assertEquals(block.shape, spaceShape,
"didn't add shape to space")
def test_degenerate_cases(self):
self.assertEquals(offset_verts([], (1, 1)), [], "bad for empty list")
self.assertEquals(offset_verts((), (1, 1)), (), "bad for empty tuple")
def test_tuple_returns_tuple(self):
verts = ((0, 1), (-2, -3), (4, 5))
self.assertEquals(offset_verts(verts, (10, 20)), ((10, 21), (8, 17), (14, 25)), "bad offset tuple verts")
def test_offset_verts(self):
verts = [(0, 1), (-2, -3), (4, 5)]
self.assertEquals(offset_verts(verts, (10, 20)), [(10, 21), (8, 17), (14, 25)], "bad offset verts")
def offset(self, offset):
self.verts = offset_verts(self.verts, offset)
