def makeStepVal(name, start, end, steps, locks=self._moveLock):
"""
This function gets called in event time, not right now!
"""
if name in locks:
# Special case
# We set =end on every frame if the end is a function (lambda).
return None
elif isinstance(end, (tuple, list)):
# Assume these are 3D values.
return div3D(
diff3D(start, end),
steps
)
elif isinstance(end, FunctionType):
# Evaluate lambdas here:
# in clocktime this is the start of movement.
# This can only lead to confusion.
print "self:", self
print "kwargs:", kwargs
print "name:", name
print "end:", end
assert (False)
else:
return float(end - start) / steps
def midpoint(self):
"""
Edge.midpoint() -> (float,float,float)
Returns the midpoint of this edge as a position tuple.
"""
from utilities import add3D, div3D
sum = add3D(self.source.pos, self.target.pos)
return div3D(sum, 2.0)
def arrangeStepwise(self, graph, vertices, newPos, duration, wait=0.0, tween=True):
"""
Arrange the vertices of the graph into a new layout
specified by an indexed list of new positions newPos.
The vertices will be positioned one at a time.
"""
assert (len(newPos) == len(vertices))
delay = float(duration) / len(vertices)
from math import floor
if tween:
if delay > (1.0 / self.parent.fps):
# No sense tweening faster than the frame rate can keep up
stepsPerVert = int(floor(delay / (1.0 / self.parent.fps)))
totalMove = [diff3D(a, b) for a, b in zip([x.pos for x in vertices], newPos)]
partialMove = [div3D(x, stepsPerVert) for x in totalMove]
else:
tween = False
accum = wait
for i in range(len(vertices)):
if tween:
accum += delay / stepsPerVert
for step in range(stepsPerVert - 1):
self.post(accum,
objects=(
vertices[i],
),
props=(
(
'pos',
add3D(vertices[i].pos, mult3D(partialMove[i], (step + 1))),
),
),
changeGraph=graph,
)
accum += delay / stepsPerVert
else:
accum += delay
self.post(accum,
objects=(
vertices[i],
),
props=(
('pos', newPos[i]),
),
changeGraph=graph,
)
self.signal()
def perspCameraLookatMove(self, camera, newPos, fixLook, duration, wait=0.0):
"""
Moves the camera smoothly to a new position and orientation.
If newLook is None, does not change the orientation of the camera.
If newPos is None, does not change the position of the camera.
"""
from camera import Camera, OrthoCamera, X_AXIS, Y_AXIS, Z_AXIS
assert (not isinstance(camera, OrthoCamera))
fixLook = self.normalizePos(fixLook)
steps = int(duration * self.parent.fps)
deltaPos = diff3D(camera.pos, newPos)
stepPos = div3D(deltaPos, steps)
accum = wait
delay = 1.0 / self.parent.fps
# Set up the animation
for i in range(steps - 1):
accum += delay
self.post(accum,
objects=(camera,),
props=(
( 'pos', add3D(camera.pos, mult3D(stepPos, i + 1)) ),
( 'lookAt', fixLook),
),
call=(
('absrotate', (Y_AXIS, stepYaw), {}),
('rotate', (X_AXIS, stepPitch), {}),
),
)
# Finish up in the correct place
accum += delay
self.post(accum,
objects=(camera,),
props=(
('pos', newPos),
('lookAt', fixLook),
),
)
self.signal()
def arrangeMorph(self, graph, vertices, newPos, duration, wait=0.0):
"""
Arrange the vertices of the graph into a new layout
specified by an indexed list of new positions newPos.
The vertices will be positioned simultaneously (smooth morph)
"""
assert (len(newPos) == len(vertices))
accum = wait
steps = int(duration * self.parent.fps)
delay = 1.0 / self.parent.fps
d = [div3D(diff3D(a.pos, b), steps) for a, b in zip(vertices, newPos)]
for i in range(steps - 1):
accum += delay
self.post(accum,
objects=vertices,
multiprops=(
(
'pos',
[add3D(a.pos, mult3D(b, i + 1)) for a, b in zip(vertices, d)]
),
),
changeGraph=graph,
)
accum += delay
self.post(accum,
objects=vertices,
multiprops=(
('pos', newPos),
),
changeGraph=graph,
)
self.signal()
def perspCameraMove(self, camera, newPos=None, newLook=None, duration=1.0, wait=0.0):
"""
Moves the camera smoothly to a new position and orientation.
If newLook is None, does not change the orientation of the camera.
If newPos is None, does not change the position of the camera.
"""
from camera import Camera, OrthoCamera, X_AXIS, Y_AXIS, Z_AXIS
assert (not isinstance(camera, OrthoCamera))
newCam = Camera()
if newPos != None:
newCam.pos = self.normalizePos(newPos)
else:
newCam.pos = camera.pos
if newLook != None:
newCam.lookAt = self.normalizePos(newLook)
else:
newCam.lookAt = camera.lookAt
steps = int(duration * self.parent.fps)
(oldTheta, oldPhi) = camera.polar()
(newTheta, newPhi) = newCam.polar()
deltaYaw = newTheta - oldTheta
deltaPitch = newPhi - oldPhi
deltaPos = diff3D(camera.pos, newCam.pos)
# Check to make sure we're coming around the short side
if deltaYaw > 180.0:
deltaYaw = deltaYaw - 360.0
elif deltaYaw < -180.0:
deltaYaw = deltaYaw + 360.0
print "DeltaYaw", deltaYaw
stepYaw = deltaYaw / steps
stepPitch = deltaPitch / steps
stepPos = div3D(deltaPos, steps)
accum = wait
delay = 1.0 / self.parent.fps
# Set up the animation
for i in range(steps - 1):
accum += delay
self.post(accum,
objects=(
camera,
),
props=(
(
'pos',
add3D(camera.pos, mult3D(stepPos, i + 1)),
),
),
call=(
('absrotate', (Y_AXIS, stepYaw), {}),
('rotate', (X_AXIS, stepPitch), {}),
),
)
# Finish up in the correct place
accum += delay
self.post(accum,
objects=(camera,),
props=(
('pos', newCam.pos),
('lookAt', newCam.lookAt),
),
)
self.signal()
