def test_nested_envelope():
s1 = envelope.EnvelopeSegment(start=0, change=1.0, duration=1.0, label='seg1')
s2 = envelope.EnvelopeSegment(start=1, change=-1.0, duration=1.0, label='seg2')
s3 = envelope.EnvelopeSegment(start=0, change=1.0, duration=1.0, label='seg3')
s4 = envelope.EnvelopeSegment(start=1, change=-1.0, duration=1.0, label='seg4')
e1 = envelope.Envelope(label='e1')
e2 = envelope.Envelope(label='e2')
e3 = envelope.Envelope(label='e3')
e1.segments = [s1, s2]
e2.segments = [s3, s4]
e3.segments = [e1, e2]
e3.update(.5)
assert e3.value == .5
e3.update(.4)
assert e3.value == .9
def test_trigger_envelope():
s1 = envelope.StaticEnvelopeSegment(start=.3)
s2 = envelope.EnvelopeSegment(start=.3, change=-.3, duration=1.0)
e = envelope.TriggeredEnvelope()
e.segments = [s1, s2]
# value does not update until triggered
val = e.update(.5)
assert val == 0
e.trigger(state=1)
val = e.update(.5)
assert val == .3
# in this case have static envelope
for i in range(10):
val = e.update(.5)
assert e.index == 0
assert val == .3
assert e.state == 1
e.trigger(state=0)
assert e.index == 1
val = e.update(.5)
assert val == .15
# non-looping
for i in range(10):
val = e.update(.5)
assert val == 0
assert e.index == 1
e.trigger(state=1)
assert e.index == 0
# force state of partial value
e.value = .2
e.trigger(state=0)
# test that off segment shortcutted in time to current
# value
assert round(e.current_segment_time_delta, 2) == .33
def test_looping_envelope():
s1 = envelope.EnvelopeSegment(start=0, change=1.0, duration=1.0, label='a')
s2 = envelope.EnvelopeSegment(start=1, change=-1.0, duration=1.0, label='b')
e = envelope.Envelope(loop=2, label='looping-envelope')
e.segments = [s1, s2] # 2 seconds for full envelope - 2 loops, 4 secs total
# start off with 2 loops remaining
assert e.loop_counter == 2
for i in range(6):
e.update(.5)
# after 3 seconds - should be in second loop
assert e.loop_counter == 1
# after a bunch more time, loop is over, returning last value
for i in range(10):
val = e.update(.5)
assert e.loop_counter == 0
assert val == 0
e.loop = -1 # infinite loop
e.reset()
for i in range(81):
val = e.update(.5)
assert e.loop_counter == -1
assert val == .5
def test_simple_evelope():
s1 = envelope.EnvelopeSegment(start=0, change=1.0, duration=1.0)
s2 = envelope.EnvelopeSegment(start=1, change=-1.0, duration=1.0)
e = envelope.Envelope()
e.segments = [s1, s2]
assert e.value == 0
val = e.update(.5)
assert val == .5
val = e.update(.4)
assert val == .9
val = e.update(.11)
assert e.index == 1
assert val == .99
val = e.update(.19)
assert val == .8
val = e.update(.8)
assert val == 0
# the envelope is over, return final value
val = e.update(3)
assert val == 0
# resetting the envelope allows new updates
e.reset()
val = e.update(.8)
assert val == .8
def test_envelope_segment():
e = envelope.EnvelopeSegment(start=0, change=1.0, duration=1.0)
r = e.update(.5)
assert r == .5