def ioq(ask=True):
pipeline = [(('object', 'model'), ('model', ), ('world', )),
(('world', ), ('view', 'camera'), ('camera', 'eye')),
(('camera', 'eye'), ('projection', ), ('canonical view volume',
'clip')),
(('canonical view volume', 'clip'), ('perspective division', ),
('2d', )), (('2d', ), ('viewport', ), ('screen', ))]
stage = rv.choose_random_from(pipeline)
space_syn = rv.choose_random_from(("space", "coordinates"))
qp = (
rv.choose_random_from(stage[0]),
rv.choose_random_from(stage[1]),
rv.choose_random_from(stage[2]),
)
qidx = rv.choose_random_from(range(len(qp)))
q = 'The %s transformation transforms %s %s into %s %s.\n' % (
qp[1], qp[0], space_syn, qp[2], space_syn)
q = q.replace(qp[qidx], rv.blank())
# hacky: fix phrasing for some terms that don't fit templates
q = q.replace("The perspective division transformation",
"Perspective division")
q = q.replace("canonical view volume %s" % space_syn,
"the canonical view volume")
a = stage[qidx]
categories = [y for x in pipeline for y in x[qidx]]
if ask:
ua = rv.expect_categorical(q, categories)
rv.check_answer(a, ua, q, "input/output",
part_of_str_answer_is_in_choices)
else:
return q, a, (categories)
def directionq():
x = rv.vector3()
y = rv.vector3()
a = 'a'
if (x.dot(y) < 0):
a = 'b'
elif x.dot(y) == 0:
a = 'c'
q = "What is the relationship between the following two vectors?\n %s, %s\n a) They point in the same direction\n b) they point in opposite directions\n c) they are perpendicular\n" % (
numpy.array_str(x), numpy.array_str(y))
ua = rv.expect_categorical(q, ('a', 'b', 'c'))
rv.check_answer(a, ua, q, "direction")
def samplingq(ask=True):
ir = np.random.randint(2**4, 2**7, 2)
q1 = "Given a texture of size (%d, %d) and an image of size (%d, %d), how many texels must cover each pixel?" % (
ir[0], ir[0], ir[1], ir[1])
a1 = ir[0] / ir[1]
q2 = "Is this a problem of magnification (mag) or minification (min)?"
if ir[0] < ir[1]:
a2 = "mag"
else:
a2 = "min"
rv.writeModule(dict(zip("ir, a1, a2".split(','), (ir, a1, a2))))
if ask:
ua1 = rv.expect_float(q1)
rv.check_answer(a1, ua1, q1, "texel:pixel")
ua2 = rv.expect_categorical(q2, ('mag', 'min'))
rv.check_answer(a2, ua2, q2, "magnification")
else:
return rv.combine((q1, q2), False), rv.combine((a1, a2), False)
def projectionq(ask=True):
projectionqs = [
("Projectors pass through a *viewpoint*.", 'p'),
("Projectors all are in the same projection *direction*.", 'o'),
("Further objects are smaller.", 'p'),
("Parallel lines are preserved.", 'o'),
("Viewing volume is shaped like a frustum.", 'p'),
("Viewing volume is shaped like a parallelipiped.", 'o'),
("Looks more natural.", 'p'),
("Useful for architectural drawings.", 'o'),
]
pq = rv.choose_random_from(projectionqs)
q = "For which kind of projection is the following statement true? Answer 'p' for perspective or 'o' for orthographic.\n %s " % pq[
0]
a = pq[1]
if ask:
ua = rv.expect_categorical(q, ('o', 'p'))
rv.check_answer(a, ua, q, "projection")
else:
return q, a, ()