def gen_value_Keyframed(lottie, animated, idx):
"""
Generates the dictionary corresponding to properties/valueKeyframed.json in
lottie documentation
Args:
lottie (dict) : Lottie bezier curve stored in this
animated (lxml.etree._Element) : Synfig format animation
idx (int) : Index of animation
Returns:
(None)
"""
lottie["ix"] = idx
lottie["a"] = 1
lottie["k"] = []
for i in range(len(animated) - 1):
lottie["k"].append({})
gen_value_Keyframe(lottie["k"], animated, i)
last_waypoint_frame = get_frame(animated[-1])
lottie["k"].append({})
lottie["k"][-1]["t"] = last_waypoint_frame
if "h" in lottie["k"][-2].keys():
lottie["k"][-1]["h"] = 1
lottie["k"][-1]["s"] = lottie["k"][-2]["e"]
# specific case for points when prev_points > cur_points
if animated.attrib["type"] == "points":
if lottie["k"][-2]["s"][0] > lottie["k"][-1]["s"][0]:
# Adding 1 frame to the previous time
prev_frames = get_frame(animated[-2])
lottie["k"][-1]["t"] = prev_frames + 1
time_adjust(lottie, animated)
def calc_pos_and_size(size_animated, pos_animated, animated_1, animated_2,
orig_path, i, i1):
"""
Between two frames, this function is called if either "only point1's
interval is constant" or "only point2's interval is constant". It calculates
the position and size property for lottie format. It also adds a new
waypoint just before the end of the frame if required.
param3: Can be param1 or param2 of rectangle layer
param4: Can be param2 or param1 of rectangle layer, but opposite of param3
Args:
size_animated (lxml.etree._Element): Holds the size parameter of rectangle layer in Synfig format
pos_animated (lxml.etree._Element): Holds the position parameter of rectangle layer in Synfig format
animated_1 (lxml.etree._Element): Holds the param3 in Synfig format
animated_2 (lxml.etree._Element): Holds the param4 in Synfig format
orig_path (dict) : Holds the param4 in Lottie format
i (int) : Iterator for animated_2
i1 (int) : Iterator for pos_animated and size_animated
Returns:
(int, int) : Updated iterators i and i1 are returned
"""
pos_animated[i1].attrib["after"] = animated_2[i].attrib["after"]
size_animated[i1].attrib["after"] = animated_2[i].attrib["after"]
copy_tcb(pos_animated[i1], animated_2[i])
copy_tcb(size_animated[i1], animated_2[i])
get_average(pos_animated[i1], animated_1[i], animated_2[i])
get_difference(size_animated[i1], animated_1[i], animated_2[i])
# Inserting a waypoint just before the nextwaypoint
# Only if a waypoint can be inserted
t_next = get_frame(animated_2[i + 1])
t_present = get_frame(animated_2[i])
######### Need to check if t_next - t_present < 2 #####
if abs(t_next - t_present) >= 2:
pos = get_vector_at_frame(orig_path, t_next - 1)
pos = to_Synfig_axis(pos, "vector")
new_waypoint = copy.deepcopy(pos_animated[i1])
new_waypoint.attrib["before"] = new_waypoint.attrib["after"]
new_waypoint.attrib["time"] = str(
(t_next - 1) / settings.lottie_format["fr"]) + "s"
new_waypoint[0][0].text, new_waypoint[0][1].text = str(pos[0]), str(
pos[1])
n_size_waypoint = copy.deepcopy(new_waypoint)
get_average(new_waypoint, new_waypoint, animated_1[i])
get_difference(n_size_waypoint, n_size_waypoint, animated_1[i])
pos_animated.insert(i1 + 1, new_waypoint)
size_animated.insert(i1 + 1, n_size_waypoint)
i1 += 1
i, i1 = i + 1, i1 + 1
get_average(pos_animated[i1], animated_1[i], animated_2[i])
get_difference(size_animated[i1], animated_1[i], animated_2[i])
return i, i1
def clamped_tangent(p1, p2, p3, animated, i):
"""
Function corresponding to clamped function in Synfig
It generates the tangent when clamped waypoints are used
Args:
p1 (float) : First point
p2 (float) : Second point
p3 (float) : Third point
animated (lxml.etree._Element) : Synfig format animation
i (int) : Iterator over animation
Returns:
(float) : Clamped tangent is returned
"""
# pw -> prev_waypoint, w -> waypoint, nw -> next_waypoint
pw, w, nw = animated[i - 1], animated[i], animated[i + 1]
t1 = get_frame(pw)
t2 = get_frame(w)
t3 = get_frame(nw)
bias = 0.0
tangent = 0.0
pm = p1 + (p3 - p1) * (t2 - t1) / (t3 - t1)
if p3 > p1:
if p2 >= p3 or p2 <= p1:
tangent = tangent * 0.0
else:
if p2 > pm:
bias = (pm - p2) / (p3 - pm)
elif p2 < pm:
bias = (pm - p2) / (pm - p1)
else:
bias = 0.0
tangent = (p2 - p1) * (1.0 + bias) / 2.0 + (p3 - p2) * (1.0 -
bias) / 2.0
elif p1 > p2:
if p2 >= p1 or p2 <= p3:
tangent = tangent * 0.0
else:
if p2 > pm:
bias = (pm - p2) / (pm - p1)
elif p2 < pm:
bias = (pm - p2) / (p3 - pm)
else:
bias = 0.0
tangent = (p2 - p1) * (1.0 + bias) / 2.0 + (p3 - p2) * (1.0 -
bias) / 2.0
else:
tangent = tangent * 0.0
return tangent
def gen_properties_multi_dimensional_keyframed(lottie, animated, idx):
"""
Generates the dictionary corresponding to
properties/multiDimensionalKeyframed.json
Args:
lottie (dict) : Lottie generated keyframes will be stored here
animated (lxml.etree._Element) : Synfig format animation
idx (int) : Index/Count of animation
Returns:
(None)
"""
lottie["a"] = 1
lottie["ix"] = idx
lottie["k"] = []
for i in range(len(animated) - 1):
lottie["k"].append({})
gen_properties_offset_keyframe(lottie["k"], animated, i)
last_waypoint_frame = get_frame(animated[-1])
lottie["k"].append({})
lottie["k"][-1]["t"] = last_waypoint_frame
if "h" in lottie["k"][-2].keys():
lottie["k"][-1]["h"] = 1
lottie["k"][-1]["s"] = lottie["k"][-2]["e"]
# Time adjust of the curves
time_adjust(lottie, animated)
def gen_hold_waypoints(inactive_time, layer, anim_type):
"""
Will only be used to modify opacity waypoints, and set zero values where the
layer is inactive
Args:
inactive_time (set) : Range of time when the layer will be inactive
layer (common.Layer.Layer) : Synfig format layer
anim_type (str) : Specifies whether it is effects_opacity or opacity (it
will effect a factor of 100)
Returns:
(common.Param.Param) : Modified opacity animation is returned
"""
opacity = layer.get_param("amount")
opacity.animate(anim_type)
opacity_dict = {}
opacity_dict["o"] = {}
opacity.fill_path(opacity_dict, "o")
opacity_dict = opacity_dict["o"]
for it in inactive_time:
# First add waypoints at both points, make it constant interval
# then remove any in-between waypoints
first = round(it[0] * settings.lottie_format["fr"])
second = round(it[1] * settings.lottie_format["fr"])
insert_waypoint_at_frame(opacity[0], opacity_dict, first, anim_type)
insert_waypoint_at_frame(opacity[0], opacity_dict, second, anim_type)
# Making it a constant interval
for waypoint in opacity[0]:
if approximate_equal(get_frame(waypoint), first):
st_waypoint = waypoint
break
st_waypoint.attrib["after"] = "constant"
st_waypoint[0].attrib["value"] = str(0)
# removing the in between waypoints
for waypoint in opacity[0]:
this_frame = get_frame(waypoint)
if (not approximate_equal(this_frame, first)) and \
(not approximate_equal(this_frame, second)) and \
(this_frame > first and this_frame < second):
waypoint.getparent().remove(waypoint)
return opacity
def gen_hold_waypoints(deactive_time, layer, anim_type):
"""
Will only be used to modify opacity waypoints, and set zero values where the
layer is deactive
Args:
deactive_time (set) : Range of time when the layer will be deactive
layer (lxml.etree._Element) : Synfig format layer
anim_type (str) : Specifies whether it is effects_opacity or opacity (it
will effect a factor of 100)
Returns:
(lxml.etree._Element) : Modified opacity animation is returned
"""
for chld in layer:
if chld.tag == "param" and chld.attrib["name"] == "amount":
opacity = chld
opacity = gen_dummy_waypoint(opacity, "param", anim_type, "amount")
opacity_dict = {}
gen_value_Keyframed(opacity_dict, opacity[0], 0)
for it in deactive_time:
# First add waypoints at both points, make it constant interval
# then remove any in-between waypoints
first = round(it[0] * settings.lottie_format["fr"])
second = round(it[1] * settings.lottie_format["fr"])
insert_waypoint_at_frame(opacity[0], opacity_dict, first, anim_type)
insert_waypoint_at_frame(opacity[0], opacity_dict, second, anim_type)
# Making it a constant interval
for waypoint in opacity[0]:
if approximate_equal(get_frame(waypoint), first):
st_waypoint = waypoint
break
st_waypoint.attrib["after"] = "constant"
st_waypoint[0].attrib["value"] = str(0)
# removing the in between waypoints
for waypoint in opacity[0]:
this_frame = get_frame(waypoint)
if (not approximate_equal(this_frame, first)) and \
(not approximate_equal(this_frame, second)) and \
(this_frame > first and this_frame < second):
waypoint.getparent().remove(waypoint)
return opacity
def waypoint_at_frame(anim, frame):
"""
Returns true if a waypoint is present at 'frame'
"""
for waypoint in anim:
fr = get_frame(waypoint)
if fr == frame:
return True
return False
def get_bool_at_frame(anim, frame):
"""
Calculates the boolean value at a given frame, given a boolean animation
Args:
anim (lxml.etree._Element): Boolean animation
frame (int) : Frame at which the value is to be calculated
Returns:
(bool) : True if the value is "true" at that frame
: False otherwise
"""
i = 0
while i < len(anim):
cur_fr = get_frame(anim[i])
if frame <= cur_fr:
break
i += 1
if i == 0:
val = anim[0][0].attrib["value"]
elif i < len(anim):
# frame lies between i-1 and i'th value of animation
prev = anim[i - 1][0].attrib["value"]
cur = anim[i][0].attrib["value"]
cur_frame = get_frame(anim[i])
if frame == cur_frame:
val = cur
else:
if prev == "true" and cur == "false":
val = prev
elif prev == "false" and cur == "true":
val = cur
elif prev == "true" and cur == "true":
val = cur
elif prev == "false" and cur == "false":
val = cur
elif i >= len(anim):
val = anim[-1][0].attrib["value"]
if val == "false":
val = False
else:
val = True
return val
def get_cross_list(animation_1, animation_2, orig_path_1, orig_path_2):
"""
This function will return a list('set' technically) at which the point1 and point2 of rectangle
will cross each other.
This set might contain frames at which waypoints are already present, hence
this need to be taken care of
Args:
animation_1 (lxml.etree._Element): Stores the animation of `point1` parameter in Synfig format
animation_2 (lxml.etree._Element): Stores the animation of `point2` parameter in Synfig format
orig_path_1 (dict) : Stores the animation of `point1` parameter in Lottie format
orig_path_2 (dict) : Stores the animation of `point2` parameter in Lottie format
Returns:
(set) : Contains the frames at which point1 and point2 cross each other
"""
en_fr = max(get_frame(animation_1[-1]), get_frame(animation_2[-1]))
# Function to determine the sign of a variable
sign = lambda a: (1, -1)[a < 0]
prev_1 = float(animation_1[0][0][0].text), float(animation_1[0][0][1].text)
prev_2 = float(animation_2[0][0][0].text), float(animation_2[0][0][1].text)
# The list to be returned
ret_list = set()
frame = 1
# Loop for all the frames
while frame <= en_fr:
now_1 = get_vector_at_frame(orig_path_1, frame)
now_1 = to_Synfig_axis(now_1, "vector")
now_2 = get_vector_at_frame(orig_path_2, frame)
now_2 = to_Synfig_axis(now_2, "vector")
is_needed = False
if sign(prev_1[0] - prev_2[0]) != sign(now_1[0] - now_2[0]):
is_needed = True
elif sign(prev_1[1] - prev_2[1]) != sign(now_1[1] - now_2[1]):
is_needed = True
if is_needed:
ret_list.add(frame - 1)
ret_list.add(frame)
prev_1, prev_2 = now_1, now_2
frame += 1
return ret_list
def gen_image_scale(animated_1, animated_2, width, height):
"""
In Synfig, no scale parameter is available for image layer, so it will be
created here for Lottie conversion
Args:
animated_1 (lxml.etree._Element): point1 animation in Synfig format
animated_2 (lxml.etree._Element): point2 animation in Synfig format
width (int) : Width of the original image
height (int) : Height of the original image
Returns:
(lxml.etree._Element) : Scale parameter in Synfig format
"""
st = '<param name="image_scale"><real value="0.0000000000"/></param>'
root = etree.fromstring(st)
root = gen_dummy_waypoint(root, "param", "image_scale")
anim1_path, anim2_path = {}, {}
gen_properties_multi_dimensional_keyframed(anim1_path, animated_1, 0)
gen_properties_multi_dimensional_keyframed(anim2_path, animated_2, 0)
# Filling the first 2 frames with there original scale values
fill_image_scale_at_frame(root[0], anim1_path, anim2_path, width, height,
0)
fill_image_scale_at_frame(root[0], anim1_path, anim2_path, width, height,
1)
mx_fr = max(get_frame(animated_1[-1]), get_frame(animated_2[-1]))
fr = 2
while fr <= mx_fr:
new_waypoint = copy.deepcopy(root[0][0])
time = fr / settings.lottie_format["fr"]
time = str(time) + "s"
new_waypoint.attrib["time"] = time
root[0].append(new_waypoint)
fill_image_scale_at_frame(root[0], anim1_path, anim2_path, width,
height, fr)
fr += 1
return root
def insert_waypoint_at_frame(animated, orig_path, frame, animated_name):
"""
This function will only insert a waypoint at 'frame' if no waypoint is
present at that 'frame' already
Args:
animated (lxml.etree._Element): Holds the animation in Synfig xml format
orig_path (dict) : Holds the animation in Lottie format
frame (int) : The frame at which the waypoint is to be inserted
animated_name (str) : The name/type of animation
Returns:
(None)
"""
i = 0
while i < len(animated):
at_frame = get_frame(animated[i])
if approximate_equal(frame, at_frame):
return
elif frame < at_frame:
break
i += 1
pos = get_vector_at_frame(orig_path, frame)
pos = to_Synfig_axis(pos, animated_name)
if i == len(animated):
new_waypoint = copy.deepcopy(animated[i - 1])
else:
new_waypoint = copy.deepcopy(animated[i])
if animated_name == "vector":
new_waypoint[0][0].text = str(pos[0])
new_waypoint[0][1].text = str(pos[1])
else:
new_waypoint[0].attrib["value"] = str(pos)
new_waypoint.attrib["time"] = str(
frame / settings.lottie_format["fr"]) + "s"
if i == 0 or i == len(animated):
# No need of tcb value copy as halt interpolation need to be copied here
new_waypoint.attrib["before"] = new_waypoint.attrib[
"after"] = "constant"
else:
copy_tcb_average(new_waypoint, animated[i], animated[i - 1])
new_waypoint.attrib["before"] = animated[i - 1].attrib["after"]
new_waypoint.attrib["after"] = animated[i].attrib["before"]
# If the interval was constant before, then the whole interval should
# remain constant now also
if new_waypoint.attrib["before"] == "constant" or new_waypoint.attrib[
"after"] == "constant":
new_waypoint.attrib["before"] = new_waypoint.attrib[
"after"] = "constant"
animated.insert(i, new_waypoint)
def gen_dummy_waypoint(non_animated,
animated_tag,
anim_type,
animated_name="anything"):
"""
Makes a non animated parameter to animated parameter by creating a new dummy
waypoint with constant animation
Args:
non_animated (lxml.etree._Element): Holds the non-animated parameter in Synfig xml format
animated_tag(str) : Decides the tag of the animation
anim_type (str) : Decides the animation type
Returns:
(lxml.etree._Element) : Updated non-animated parameter, which is now animated
"""
is_animate = is_animated(non_animated[0])
if is_animate == settings.ANIMATED:
# If already animated, no need to add waypoints
# Forcibly set it's animation type to the given anim_type :needed in:->
# properties/shapePropKeyframe.py #31
non_animated[0].attrib["type"] = anim_type
return non_animated
elif is_animate == settings.NOT_ANIMATED:
st = '<{animated_tag} name="{animated_name}"><animated type="{anim_type}"><waypoint time="0s" before="constant" after="constant"></waypoint></animated></{animated_tag}>'
st = st.format(anim_type=anim_type,
animated_name=animated_name,
animated_tag=animated_tag)
root = etree.fromstring(st)
root[0][0].append(copy.deepcopy(non_animated[0]))
non_animated = root
elif is_animate == settings.SINGLE_WAYPOINT:
# Forcibly set it's animation type to the given anim_type
non_animated[0].attrib["type"] = anim_type
non_animated[0][0].attrib["before"] = non_animated[0][0].attrib[
"after"] = "constant"
new_waypoint = copy.deepcopy(non_animated[0][0])
frame = get_frame(non_animated[0][0])
frame += 1
time = frame / settings.lottie_format["fr"]
time = str(time) + "s"
new_waypoint.attrib["time"] = time
non_animated[0].insert(1, new_waypoint)
return non_animated
def update_frame_window(node, window):
"""
Given an animation, finds the minimum and maximum frame at which the
waypoints are located
Args:
node (lxml.etree._Element) : Animation to be searched in
window (dict) : max and min frame will be stored in this
Returns:
(None)
"""
if is_animated(node) == 2:
for waypoint in node:
fr = get_frame(waypoint)
if fr > window["last"]:
window["last"] = fr
if fr < window["first"]:
window["first"] = fr
def get_animated_time_list(child, time_list):
"""
Appends all the frames corresponding to the waypoints in the
animated(child[0]) list, in time_list
Args:
child (lxml.etree._Element) : Parent Element of animation
time_list (set) : Will store all the frames at which waypoints are present
Returns:
(None)
"""
animated = child[0]
is_animate = is_animated(animated)
if is_animate in {settings.NOT_ANIMATED, settings.SINGLE_WAYPOINT}:
return
for waypoint in animated:
frame = get_frame(waypoint)
time_list.add(frame)
def modify_bool_animation(anim):
"""
Inserts waypoints at such frames so that the animation is similar to that in
lottie
"""
i = 0
while i < len(anim):
cur_fr = get_frame(anim[i])
val_now = get_bool_at_frame(anim, cur_fr)
# Check at one frame less and one frame more: only cases
if cur_fr - 1 >= settings.lottie_format[
"ip"] and not waypoint_at_frame(anim, cur_fr - 1):
val_before = get_bool_at_frame(anim, cur_fr - 1)
if val_now != val_before:
new = copy.deepcopy(anim[i])
new.attrib["time"] = str(
(cur_fr - 1) / settings.lottie_format["fr"]) + "s"
if val_before:
new[0].attrib["value"] = "true"
else:
new[0].attrib["value"] = "false"
anim.insert(i, new)
i += 1
if cur_fr + 1 <= settings.lottie_format[
"op"] and not waypoint_at_frame(anim, cur_fr + 1):
val_after = get_bool_at_frame(anim, cur_fr + 1)
if val_after != val_now:
new = copy.deepcopy(anim[i])
new.attrib["time"] = str(
(cur_fr + 1) / settings.lottie_format["fr"]) + "s"
if val_after:
new[0].attrib["value"] = "true"
else:
new[0].attrib["value"] = "false"
anim.insert(i + 1, new)
i += 1
i += 1
# Make the animation constant
for waypoint in anim:
waypoint.attrib["before"] = waypoint.attrib["after"] = "constant"
def both_points_animated(animated_1, animated_2, param_expand, lottie, index):
"""
This function generates the lottie dictionary for position and size property
of lottie(point1 and point2 are used from Synfig), when both point1 and
point2 are animated
Args:
animated_1 (lxml.etree._Element): Holds the parameter `point1`'s animation in Synfig xml format
animated_2 (lxml.etree._Element): Holds the parameter `point2`'s animation in Synfig xml format
param_expand (lxml.etree._Element): Holds the parameter `expand`'s animation in Synfig xml format
lottie (dict) : Lottie format rectangle layer will be store in this
index (int) : Stores the index of parameters in rectangle layer
Returns:
(None)
"""
animated_1, animated_2 = animated_1[0], animated_2[0]
orig_path_1, orig_path_2 = {}, {}
expand_path = {}
gen_value_Keyframed(expand_path, param_expand[0], 0)
gen_properties_multi_dimensional_keyframed(orig_path_1, animated_1, 0)
gen_properties_multi_dimensional_keyframed(orig_path_2, animated_2, 0)
#################### SECTION 1 ###########################
# Insert waypoints in the point1 and point2 parameter at the place where
# expand parameter is animated
time_list = set()
get_animated_time_list(param_expand, time_list)
for frame in time_list:
insert_waypoint_at_frame(animated_1, orig_path_1, frame, "vector")
insert_waypoint_at_frame(animated_2, orig_path_2, frame, "vector")
#################### END OF SECTION 1 ####################
### SECTION TRY ###
# Every frames value is precomputed in order to achieve maximum similarity
# to that of Synfig
st_fr = min(get_frame(animated_1[0]), get_frame(animated_2[0]))
en_fr = max(get_frame(animated_1[-1]), get_frame(animated_2[-1]))
fra = st_fr
while fra <= en_fr:
insert_waypoint_at_frame(animated_1, orig_path_1, fra, "vector")
insert_waypoint_at_frame(animated_2, orig_path_2, fra, "vector")
fra += 1
### END SECTION ###
######################### SECTION 2 ##########################
# Insert the waypoints at corresponding positions where point1 is animated
# and point2 is animated
for waypoint in animated_1:
frame = get_frame(waypoint)
insert_waypoint_at_frame(animated_2, orig_path_2, frame, "vector")
for waypoint in animated_2:
frame = get_frame(waypoint)
insert_waypoint_at_frame(animated_1, orig_path_1, frame, "vector")
##################### END OF SECTION 2 #######################
##################### SECTION 3 ##############################
# Add the impact of expand parameter amount towards point1 and point2
# parameter
assert len(animated_1) == len(animated_2)
for waypoint1, waypoint2 in zip(animated_1, animated_2):
frame = get_frame(waypoint1)
assert frame == get_frame(waypoint2)
expand_amount = get_vector_at_frame(expand_path, frame)
expand_amount = to_Synfig_axis(expand_amount, "real")
pos1, pos2 = get_vector(waypoint1), get_vector(waypoint2)
# Comparing the x-coordinates
if pos1[0] > pos2[0]:
pos1[0] += expand_amount
pos2[0] -= expand_amount
else:
pos1[0] -= expand_amount
pos2[0] += expand_amount
# Comparing the y-coordinates
if pos1[1] > pos2[1]:
pos1[1] += expand_amount
pos2[1] -= expand_amount
else:
pos1[1] -= expand_amount
pos2[1] += expand_amount
set_vector(waypoint1, pos1)
set_vector(waypoint2, pos2)
##################### END OF SECTION 3 #######################
#################### SECTION 4 #############################
# Place waypoints at which the x and y cross each other/cross the extremas
cross_list = get_cross_list(animated_1, animated_2, orig_path_1,
orig_path_2)
for frame in cross_list:
insert_waypoint_at_frame(animated_1, orig_path_1, frame, "vector")
insert_waypoint_at_frame(animated_2, orig_path_2, frame, "vector")
#################### END SECTION 4 #########################
################## SECTION 5 ################################################
# Store the position of rectangle according to the waypoints in pos_animated
# Store the size of rectangle according to the waypoints in size_animated
pos_animated = copy.deepcopy(animated_1)
size_animated = copy.deepcopy(animated_1)
size_animated.attrib["type"] = "rectangle_size"
i, i1 = 0, 0
while i < len(animated_1) - 1:
cur_get_after_1, cur_get_after_2 = animated_1[i].attrib[
"after"], animated_2[i].attrib["after"]
next_get_before_1, next_get_before_2 = animated_1[
i + 1].attrib["before"], animated_2[i + 1].attrib["before"]
dic_1 = {"linear", "auto", "clamped", "halt"}
dic_2 = {"constant"}
constant_interval_1 = cur_get_after_1 in dic_2 or next_get_before_1 in dic_2
constant_interval_2 = cur_get_after_2 in dic_2 or next_get_before_2 in dic_2
# Case 1 no "constant" interval is present
if (cur_get_after_1 in dic_1) and (cur_get_after_2 in dic_1) and (
next_get_before_1 in dic_1) and (next_get_before_2 in dic_1):
get_average(pos_animated[i1], animated_1[i], animated_2[i])
copy_tcb_average(pos_animated[i1], animated_1[i], animated_2[i])
get_difference(size_animated[i1], animated_1[i], animated_2[i])
copy_tcb(size_animated[i1], pos_animated[i1])
i, i1 = i + 1, i1 + 1
get_average(pos_animated[i1], animated_1[i], animated_2[i])
copy_tcb_average(pos_animated[i1], animated_1[i], animated_2[i])
get_difference(size_animated[i1], animated_1[i], animated_2[i])
copy_tcb(size_animated[i1], pos_animated[i1])
# Case 2 only one "constant" interval: could mean two "constant"'s are present
elif (constant_interval_1
and not constant_interval_2) or (not constant_interval_1
and constant_interval_2):
if constant_interval_1:
i, i1 = calc_pos_and_size(size_animated, pos_animated,
animated_1, animated_2, orig_path_2,
i, i1)
elif constant_interval_2:
i, i1 = calc_pos_and_size(size_animated, pos_animated,
animated_2, animated_1, orig_path_1,
i, i1)
# Case 3 both are constant
elif constant_interval_1 and constant_interval_2:
# No need to copy tcb, as it's pos should be "constant"
get_average(pos_animated[i1], animated_1[i], animated_2[i])
get_difference(size_animated[i1], animated_1[i], animated_2[i])
i, i1 = i + 1, i1 + 1
get_difference(size_animated[i1], animated_1[i], animated_2[i])
get_average(pos_animated[i1], animated_1[i], animated_2[i])
######################### SECTION 5 END ##############################
######################### SECTION 6 ##################################
# Generate the position and size for lottie format
gen_properties_multi_dimensional_keyframed(lottie["p"], pos_animated,
index.inc())
gen_value_Keyframed(lottie["s"], size_animated, index.inc())
def gen_value_Keyframe(curve_list, animated, i):
"""
Generates the dictionary corresponding to properties/valueKeyframe.json in lottie
documentation
Args:
curve_list (list) : Bezier curve in Lottie format
animated (lxml.etree._Element) : Synfig format animation
i (int) : Iterator for animation
Returns:
(TypeError) : If hold interval is encountered
(None) : Otherwise
"""
lottie = curve_list[-1]
waypoint, next_waypoint = animated[i], animated[i + 1]
cur_get_after, next_get_before = waypoint.attrib[
"after"], next_waypoint.attrib["before"]
cur_get_before, next_get_after = waypoint.attrib[
"before"], next_waypoint.attrib["after"]
# Calculate positions of waypoints
if animated.attrib["type"] in {"angle", "star_angle_new", "region_angle"}:
#if animated.attrib["type"] in {"angle"}:
if cur_get_after == "auto":
cur_get_after = "linear"
if cur_get_before == "auto":
cur_get_before = "linear"
if next_get_before == "auto":
next_get_before = "linear"
if next_get_after == "auto":
next_get_after = "linear"
# Synfig only supports constant interpolations for points
if animated.attrib["type"] == "points":
cur_get_after = "constant"
cur_get_before = "constant"
next_get_after = "constant"
next_get_before = "constant"
# After effects only supports linear,ease-in,ease-out and constant interpolations for color
##### No support for TCB and clamped interpolations in color is there yet #####
if animated.attrib["type"] == {"color", "linear_gradient"}:
if cur_get_after in {"auto", "clamped"}:
cur_get_after = "linear"
if cur_get_before in {"auto", "clamped"}:
cur_get_before = "linear"
if next_get_before in {"auto", "clamped"}:
next_get_before = "linear"
if next_get_after in {"auto", "clamped"}:
next_get_after = "linear"
cur_pos = parse_position(animated, i)
next_pos = parse_position(animated, i + 1)
lottie["t"] = get_frame(waypoint)
lottie["s"] = cur_pos.get_val()
lottie["e"] = next_pos.get_val()
lottie["i"] = {}
lottie["o"] = {}
try:
out_val, in_val = calc_tangent(animated, lottie, i)
except Exception as excep:
# That means halt/constant interval
return excep
set_tangents(out_val, in_val, cur_pos, next_pos, lottie, animated)
if cur_get_after == "halt": # For ease out
lottie["o"]["x"][0] = settings.OUT_TANGENT_X
lottie["o"]["y"][0] = settings.OUT_TANGENT_Y
lottie["synfig_o"] = [0]
if next_get_before == "halt": # For ease in
lottie["i"]["x"][0] = settings.IN_TANGENT_X
lottie["i"]["y"][0] = settings.IN_TANGENT_Y
lottie["synfig_i"] = [0]
# TCB/!TCB and list is not empty
if cur_get_before == "auto" and cur_get_after != "auto" and i > 0:
# need value for previous tangents
# It may be helpful to store them somewhere
prev_ov, prev_iv = calc_tangent(animated, curve_list[-2], i - 1)
prev_iv = out_val
set_tangents(prev_ov, prev_iv, parse_position(animated, i - 1),
cur_pos, curve_list[-2], animated)
if cur_get_after == "halt":
curve_list[-2]["i"]["x"][0] = settings.IN_TANGENT_X
curve_list[-2]["i"]["y"][0] = settings.IN_TANGENT_Y
lottie["synfig_i"] = [0]
def gen_properties_offset_keyframe(curve_list, animated, i):
"""
Generates the dictionary corresponding to properties/offsetKeyFrame.json
Args:
curve_list (list) : Stores bezier curve in Lottie format
animated (lxml.etree._Element) : Synfig format animation
i (int) : Iterator for animation
Returns:
(TypeError) : If a constant interval is encountered
(None) : In all other cases
"""
lottie = curve_list[-1]
waypoint, next_waypoint = animated[i], animated[i + 1]
cur_get_after, next_get_before = waypoint.attrib[
"after"], next_waypoint.attrib["before"]
cur_get_before, next_get_after = waypoint.attrib[
"before"], next_waypoint.attrib["after"]
# "angle" interpolations never call this function, can be removed by confirming
if animated.attrib["type"] == "angle":
if cur_get_after == "auto":
cur_get_after = "linear"
if cur_get_before == "auto":
cur_get_before = "linear"
if next_get_before == "auto":
next_get_before = "linear"
if next_get_after == "auto":
next_get_after = "linear"
# Synfig only supports constant interpolations for points
# "points" never call this function, can be removed by confirming
if animated.attrib["type"] == "points":
cur_get_after = "constant"
cur_get_before = "constant"
next_get_after = "constant"
next_get_before = "constant"
# Calculate positions of waypoints
cur_pos = parse_position(animated, i)
next_pos = parse_position(animated, i + 1)
lottie["i"] = {} # Time bezier curve, not used in synfig
lottie["o"] = {} # Time bezier curve, not used in synfig
lottie["i"]["x"] = 0.5
lottie["i"]["y"] = 0.5
lottie["o"]["x"] = 0.5
lottie["o"]["y"] = 0.5
if cur_get_after == "halt": # For ease out
ease_out(lottie)
if next_get_before == "halt": # For ease in
ease_in(lottie)
lottie["t"] = get_frame(waypoint)
is_transform_axis = False
if "transform_axis" in animated.keys():
is_transform_axis = True
lottie["s"] = change_axis(cur_pos[0], cur_pos[1], is_transform_axis)
lottie["e"] = change_axis(next_pos[0], next_pos[1], is_transform_axis)
lottie["to"] = []
lottie["ti"] = []
# Calculating the unchanged tangent
try:
out_val, in_val = calc_tangent(animated, lottie, i)
except Exception as excep:
# This means constant interval
return excep
# This module is only needed for origin animation
lottie["to"] = out_val.get_list()
lottie["ti"] = in_val.get_list()
# TCB/!TCB and list is not empty
if cur_get_before == "auto" and cur_get_after != "auto" and i > 0:
curve_list[-2]["ti"] = copy.deepcopy(lottie["to"])
curve_list[-2]["ti"] = [
-item / settings.TANGENT_FACTOR for item in curve_list[-2]["ti"]
]
curve_list[-2]["ti"][1] = -curve_list[-2]["ti"][1]
if cur_get_after == "halt":
curve_list[-2]["i"]["x"] = settings.IN_TANGENT_X
curve_list[-2]["i"]["y"] = settings.IN_TANGENT_Y
# Lottie tangent length is larger than synfig
lottie["ti"] = [item / settings.TANGENT_FACTOR for item in lottie["ti"]]
lottie["to"] = [item / settings.TANGENT_FACTOR for item in lottie["to"]]
# Lottie and synfig use different tangents SEE DOCUMENTATION
lottie["ti"] = [-item for item in lottie["ti"]]
# IMPORTANT to and ti have to be relative
# The y-axis is different in lottie
lottie["ti"][1] = -lottie["ti"][1]
lottie["to"][1] = -lottie["to"][1]
# These tangents will be used in actual calculation of points according to
# Synfig
lottie["synfig_to"] = [tangent for tangent in lottie["to"]]
lottie["synfig_ti"] = [-tangent for tangent in lottie["ti"]]
if cur_get_after == "halt":
lottie["synfig_to"] = [0 for val in lottie["synfig_to"]]
if next_get_before == "halt":
lottie["synfig_ti"] = [0 for val in lottie["synfig_ti"]]
def calc_tangent(animated, lottie, i):
"""
Calculates the tangent, given two waypoints and there interpolation methods
Args:
animated (lxml.etree._Element) : Synfig format animation
lottie (dict) : Lottie format animation stored here
i (int) : Iterator for animation
Returns:
(Misc.Vector) : If waypoint's value is parsed to misc.Vector by misc.parse_position()
(Misc.Color) : If waypoint's value is parsed to misc.Color ...
(float) : If waypoint's value is parsed to float ...
(None) : If "constant" interval is detected
"""
waypoint, next_waypoint = animated[i], animated[i + 1]
cur_get_after, next_get_before = waypoint.attrib[
"after"], next_waypoint.attrib["before"]
cur_get_before, next_get_after = waypoint.attrib[
"before"], next_waypoint.attrib["after"]
if animated.attrib["type"] in {"angle", "star_angle_new", "region_angle"}:
#if animated.attrib["type"] in {"angle"}:
if cur_get_after == "auto":
cur_get_after = "linear"
if cur_get_before == "auto":
cur_get_before = "linear"
if next_get_before == "auto":
next_get_before = "linear"
if next_get_after == "auto":
next_get_after = "linear"
# Synfig only supports constant interpolations for points
if animated.attrib["type"] == "points":
cur_get_after = "constant"
cur_get_before = "constant"
next_get_after = "constant"
next_get_before = "constant"
# After effects only supports linear,ease-in,ease-out and constant interpolations for color
##### No support for TCB and clamped interpolations in color is there yet #####
if animated.attrib["type"] == "color":
if cur_get_after in {"auto", "clamped"}:
cur_get_after = "linear"
if cur_get_before in {"auto", "clamped"}:
cur_get_before = "linear"
if next_get_before in {"auto", "clamped"}:
next_get_before = "linear"
if next_get_after in {"auto", "clamped"}:
next_get_after = "linear"
# Calculate positions of waypoints
cur_pos = parse_position(animated, i)
prev_pos = copy.deepcopy(cur_pos)
next_pos = parse_position(animated, i + 1)
after_next_pos = copy.deepcopy(next_pos)
if i + 2 <= len(animated) - 1:
after_next_pos = parse_position(animated, i + 2)
if i - 1 >= 0:
prev_pos = parse_position(animated, i - 1)
tens, bias, cont = 0, 0, 0 # default values
tens1, bias1, cont1 = 0, 0, 0
if "tension" in waypoint.keys():
tens = float(waypoint.attrib["tension"])
if "continuity" in waypoint.keys():
cont = float(waypoint.attrib["continuity"])
if "bias" in waypoint.keys():
bias = float(waypoint.attrib["bias"])
if "tension" in next_waypoint.keys():
tens1 = float(next_waypoint.attrib["tension"])
if "continuity" in next_waypoint.keys():
cont1 = float(next_waypoint.attrib["continuity"])
if "bias" in next_waypoint.keys():
bias1 = float(next_waypoint.attrib["bias"])
### Special case for color interpolations ###
if animated.attrib["type"] == "color":
if cur_get_after == "linear" and next_get_before == "linear":
return handle_color()
# iter next
# ANY/TCB ------ ANY/ANY
if cur_get_after == "auto":
if i >= 1:
out_val = ((1 - tens) * (1 + bias) * (1 + cont) *\
(cur_pos - prev_pos))/2 +\
((1 - tens) * (1 - bias) * (1 - cont) *\
(next_pos - cur_pos))/2
else:
out_val = next_pos - cur_pos # t1 = p2 - p1
# iter next
# ANY/LINEAR --- ANY/ANY
# ANY/EASE --- ANY/ANY
if cur_get_after in {"linear", "halt"}:
out_val = next_pos - cur_pos
# iter next
# ANY/ANY ----- LINEAR/ANY
# ANY/ANY ----- EASE/ANY
if next_get_before in {"linear", "halt"}:
in_val = next_pos - cur_pos
# iter next
# ANY/CLAMPED - ANY/ANY
if cur_get_after == "clamped":
if i >= 1:
ease = "out"
out_val = clamped_vector(prev_pos, cur_pos, next_pos, animated, i,
lottie, ease)
else:
out_val = next_pos - cur_pos # t1 = p2 - p1
# iter next after_next
# ANY/ANY ----- CLAMPED/ANY ---- ANY/ANY
if next_get_before == "clamped":
if i + 2 <= len(animated) - 1:
ease = "in"
in_val = clamped_vector(cur_pos, next_pos, after_next_pos,
animated, i + 1, lottie, ease)
else:
in_val = next_pos - cur_pos # t2 = p2 - p1
# iter next
# ANY/CONSTANT ---- ANY/ANY
# ANY/ANY ---- CONSTANT/ANY
if cur_get_after == "constant" or next_get_before == "constant":
lottie["h"] = 1
if animated.attrib["type"] == "vector":
del lottie["to"], lottie["ti"]
del lottie["i"], lottie["o"]
# "e" is not needed, but is still not deleted as
# it is of use in the last iteration of animation
# See properties/multiDimenstionalKeyframed.py for more details
# del lottie["e"]
# If the number of points is decresing, then hold interpolation should
# have reverse effect. The value should instantly decrease and remain
# same for the rest of the interval
if animated.attrib["type"] == "points":
if i > 0 and prev_pos[0] > cur_pos[0]:
t_now = get_frame(animated[i - 1]) + 1
lottie["t"] = t_now
return
# iter next after_next
# ANY/ANY ------ TCB/ANY ------ ANY/ANY
if next_get_before == "auto":
if i + 2 <= len(animated) - 1:
in_val = ((1 - tens1) * (1 + bias1) * (1 - cont1) *\
(next_pos - cur_pos))/2 +\
((1 - tens1) * (1 - bias1) * (1 + cont1) *\
(after_next_pos - next_pos))/2
else:
in_val = next_pos - cur_pos # t2 = p2 - p1
return out_val, in_val