def do_not_test_side_facing():
thing1 = MovingSprite(x=100, y=100)
thing1.direction = 0
thing1.speed = 10
thing2 = MovingSprite()
thing2.speed = 10
thing2.position = thing1.position
thing2.degrees = 0
thing2.cartesian_motion()
assert thing1.side_facing(thing2) == FACE_FORWARD
thing2.position = thing1.position
thing2.degrees = 90
thing2.cartesian_motion()
assert thing1.side_facing(thing2) == FACE_RIGHT
thing2.position = thing1.position
thing2.degrees = 180
thing2.cartesian_motion()
assert thing1.side_facing(thing2) == FACE_BEHIND
thing2.position = thing1.position
thing2.degrees = 270
thing2.cartesian_motion()
assert thing1.side_facing(thing2) == FACE_LEFT
def test_direction_to():
tolerance = 0.0001
thing = MovingSprite(0.0, 0.0)
for degree in range(0, 720):
target = MovingSprite(0, 0, degree, 10)
target.cartesian_motion()
dirc = normal_degrees(thing.direction_to_thing(target))
ndeg = normal_degrees(degree)
assert dirc - ndeg < tolerance \
or dirc - 360 - ndeg < tolerance \
or dirc + 360 - ndeg < tolerance
def test_vector_copy():
thing1 = MovingSprite(100, 100)
thing2 = MovingSprite(0, 0)
thing2.position = thing1.position
assert thing2.x == thing1.x
assert thing2.y == thing1.y
thing1 = MovingSprite(80, 80)
thing2 = MovingSprite()
thing2.position = thing1.position
assert thing2.x == thing1.x
assert thing2.y == thing1.y
def test_constructor():
thing = MovingSprite(9, 5)
assert thing.x == 9
assert thing.y == 5
thing = MovingSprite(x=9, y=5, direction=45, speed=1000)
assert thing.x == 9
assert thing.y == 5
assert thing.direction == 45
assert thing.speed == 1000
mag, deg = thing.motion.as_polar()
assert deg == 45
assert mag == 1000
thing = MovingSprite(9, 5, 1000, 45)
assert thing.x == 9
assert thing.y == 5
assert thing.direction == 45
assert thing.speed == 1000
def test_basic_move():
thing1 = MovingSprite(x=100, y=100)
thing1.speed = 10
thing1.direction = DEGREES_EAST
thing1.cartesian_motion()
assert thing1.x == 110
assert thing1.y == 100
thing1.x = 100
assert thing1.x == 100
assert thing1.direction == 0.0
def test_motion():
thing = MovingSprite(0, 0)
thing.set_motion_polar(100, 90)
assert thing.direction == 90
assert thing.speed == 100
def test_turn_towards():
tolerance = 0.0001
# Setup subject in the middle of imaginary space
subject = MovingSprite(x=0.0, y=0.0, direction=DEGREES_EAST, speed=1.0)
subject.max_turning_speed = 22.5
# Setup target:
target = MovingSprite(x=0.0, y=0.0)
# Move target due south from center
target.position = Vector(0.0, 0.0)
target.direction = DEGREES_SOUTH
target.cartesian_motion()
# Check that subject turned south
for stop in [22.5, 45.0, 67.5, 90.0]:
subject.turn_towards(target.position)
assert abs(subject.turning_speed -
subject.max_turning_speed) < tolerance
assert abs(subject.direction - stop) < tolerance
# Reset the subject
subject.direction = DEGREES_EAST
subject.turning_speed = 0.0
# Move target due north from center
target.position = Vector(0.0, 0.0)
target.direction = DEGREES_NORTH
target.cartesian_motion()
# Check that subject turned north
for stop in [-22.5, -45.0, -67.5, -90.0]:
subject.turn_towards(target.position)
assert abs(subject.turning_speed +
subject.max_turning_speed) < tolerance
assert abs(subject.direction - stop) < tolerance
# Reset the subject
subject.direction = DEGREES_EAST
subject.turning_speed = 0.0
# Move target southwest from center
target.position = Vector(0.0, 0.0)
target.direction = DEGREES_SOUTHWEST
target.cartesian_motion()
# Check that subject turned south
for stop in [22.5, 45.0, 67.5, 90.0]:
subject.turn_towards(target.position)
assert abs(subject.turning_speed -
subject.max_turning_speed) < tolerance
assert abs(subject.direction - stop) < tolerance
# Reset the subject
subject.direction = DEGREES_EAST
subject.turning_speed = 0.0
# Move target northwest from center
target.position = Vector(0.0, 0.0)
target.direction = DEGREES_NORTHWEST
target.cartesian_motion()
# Check that subject turned north
for stop in [-22.5, -45.0, -67.5, -90.0]:
subject.turn_towards(target.position)
assert abs(subject.turning_speed +
subject.max_turning_speed) < tolerance
assert abs(subject.direction - stop) < tolerance
# Reset the subject
subject.direction = DEGREES_EAST
subject.turning_speed = 0.0
# Move target due west from center
target.position = Vector(0.0, 0.0)
target.direction = DEGREES_WEST
target.cartesian_motion()
# Check that subject turned north
subject.turn_towards(target.position)
subject.update()
assert abs(subject.turning_speed) == subject.max_turning_speed
assert abs(subject.direction) == abs(subject.direction)