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216 lines
8.9 KiB
216 lines
8.9 KiB
# This file is part of Korman. |
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# |
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# Korman is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Korman is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with Korman. If not, see <http://www.gnu.org/licenses/>. |
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import bpy |
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import math |
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import mathutils |
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from PyHSPlasma import * |
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import weakref |
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from . import utils |
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class AnimationConverter: |
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def __init__(self, exporter): |
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self._exporter = weakref.ref(exporter) |
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self._bl_fps = bpy.context.scene.render.fps |
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def convert_action2tm(self, action, default_xform): |
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"""Converts a Blender Action to a plCompoundController.""" |
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fcurves = action.fcurves |
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if not fcurves: |
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return None |
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# NOTE: plCompoundController is from Myst 5 and was backported to MOUL. |
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# Worry not however... libHSPlasma will do the conversion for us. |
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tm = plCompoundController() |
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tm.X = self.make_pos_controller(fcurves, default_xform) |
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tm.Y = self.make_rot_controller(fcurves, default_xform) |
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tm.Z = self.make_scale_controller(fcurves, default_xform) |
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return tm |
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def make_pos_controller(self, fcurves, default_xform): |
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pos_curves = (i for i in fcurves if i.data_path == "location" and i.keyframe_points) |
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keyframes, bez_chans = self._process_keyframes(pos_curves) |
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if not keyframes: |
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return None |
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# At one point, I had some... insanity here to try to crush bezier channels and hand off to |
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# blah blah blah... As it turns out, point3 keyframe's tangents are vector3s :) |
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ctrl = self._make_point3_controller(keyframes, bez_chans, default_xform.to_translation()) |
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return ctrl |
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def make_rot_controller(self, fcurves, default_xform): |
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# TODO: support rotation_quaternion |
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rot_curves = (i for i in fcurves if i.data_path == "rotation_euler" and i.keyframe_points) |
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keyframes, bez_chans = self._process_keyframes(rot_curves) |
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if not keyframes: |
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return None |
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# Ugh. Unfortunately, it appears Blender's default interpolation is bezier. So who knows if |
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# many users will actually see the benefit here? Makes me sad. |
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if bez_chans: |
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ctrl = self._make_scalar_controller(keyframes, bez_chans, default_xform.to_euler("XYZ")) |
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else: |
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ctrl = self._make_quat_controller(keyframes, default_xform.to_euler("XYZ")) |
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return ctrl |
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def make_scale_controller(self, fcurves, default_xform): |
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# ... TODO ... |
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# who needs this anyway? |
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return None |
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def _make_point3_controller(self, keyframes, bezier, default_xform): |
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ctrl = plLeafController() |
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subctrls = ("X", "Y", "Z") |
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keyframe_type = hsKeyFrame.kBezPoint3KeyFrame if bezier else hsKeyFrame.kPoint3KeyFrame |
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exported_frames = [] |
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last_xform = [default_xform[0], default_xform[1], default_xform[2]] |
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for keyframe in keyframes: |
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exported = hsPoint3Key() |
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exported.frame = keyframe.frame_num |
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exported.frameTime = keyframe.frame_time |
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exported.type = keyframe_type |
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in_tan = hsVector3() |
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out_tan = hsVector3() |
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value = hsVector3() |
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for i, subctrl in enumerate(subctrls): |
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fkey = keyframe.values.get(i, None) |
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if fkey is not None: |
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v = fkey.co[1] |
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last_xform[i] = v |
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setattr(value, subctrl, v) |
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setattr(in_tan, subctrl, keyframe.in_tans[i]) |
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setattr(out_tan, subctrl, keyframe.out_tans[i]) |
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else: |
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setattr(value, subctrl, last_xform[i]) |
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setattr(in_tan, subctrl, 0.0) |
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setattr(out_tan, subctrl, 0.0) |
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exported.inTan = in_tan |
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exported.outTan = out_tan |
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exported.value = value |
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exported_frames.append(exported) |
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ctrl.keys = (exported_frames, keyframe_type) |
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return ctrl |
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def _make_quat_controller(self, keyframes, default_xform): |
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ctrl = plLeafController() |
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keyframe_type = hsKeyFrame.kQuatKeyFrame |
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exported_frames = [] |
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last_xform = [default_xform[0], default_xform[1], default_xform[2]] |
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for keyframe in keyframes: |
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exported = hsQuatKey() |
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exported.frame = keyframe.frame_num |
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exported.frameTime = keyframe.frame_time |
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exported.type = keyframe_type |
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# NOTE: quat keyframes don't do bezier nonsense |
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value = mathutils.Euler(last_xform, default_xform.order) |
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for i in range(3): |
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fkey = keyframe.values.get(i, None) |
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if fkey is not None: |
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v = fkey.co[1] |
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last_xform[i] = v |
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value[i] = v |
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quat = value.to_quaternion() |
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exported.value = utils.quaternion(quat) |
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exported_frames.append(exported) |
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ctrl.keys = (exported_frames, keyframe_type) |
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return ctrl |
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def _make_scalar_controller(self, keyframes, bez_chans, default_xform): |
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ctrl = plCompoundController() |
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subctrls = ("X", "Y", "Z") |
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for i in subctrls: |
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setattr(ctrl, i, plLeafController()) |
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exported_frames = ([], [], []) |
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for keyframe in keyframes: |
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for i, subctrl in enumerate(subctrls): |
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fkey = keyframe.values.get(i, None) |
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if fkey is not None: |
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keyframe_type = hsKeyFrame.kBezScalarKeyFrame if i in bez_chans else hsKeyFrame.kScalarKeyFrame |
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exported = hsScalarKey() |
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exported.frame = keyframe.frame_num |
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exported.frameTime = keyframe.frame_time |
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exported.inTan = keyframe.in_tans[i] |
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exported.outTan = keyframe.out_tans[i] |
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exported.type = keyframe_type |
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exported.value = fkey.co[1] |
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exported_frames[i].append(exported) |
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for i, subctrl in enumerate(subctrls): |
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my_keyframes = exported_frames[i] |
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# ensure this controller has at least ONE keyframe |
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if not my_keyframes: |
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hack_frame = hsScalarKey() |
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hack_frame.frame = 0 |
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hack_frame.frameTime = 0.0 |
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hack_frame.type = hsKeyFrame.kScalarKeyFrame |
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hack_frame.value = default_xform[i] |
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my_keyframes.append(hack_frame) |
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getattr(ctrl, subctrl).keys = (my_keyframes, my_keyframes[0].type) |
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return ctrl |
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def _process_keyframes(self, fcurves): |
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"""Groups all FCurves for the same frame together""" |
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keyframe_data = type("KeyFrameData", (), {}) |
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fps = self._bl_fps |
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pi = math.pi |
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keyframes = {} |
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bez_chans = set() |
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for fcurve in fcurves: |
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fcurve.update() |
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for fkey in fcurve.keyframe_points: |
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frame_num, value = fkey.co |
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if fps == 30.0: |
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# hope you don't have a frame 29.9 and frame 30.0... |
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frame_num = int(frame_num) |
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else: |
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frame_num = int(frame_num * (30.0 / fps)) |
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keyframe = keyframes.get(frame_num, None) |
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if keyframe is None: |
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keyframe = keyframe_data() |
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keyframe.frame_num = frame_num |
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keyframe.frame_time = frame_num / fps |
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keyframe.in_tans = {} |
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keyframe.out_tans = {} |
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keyframe.values = {} |
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keyframes[frame_num] = keyframe |
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idx = fcurve.array_index |
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keyframe.values[idx] = fkey |
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# Calculate the bezier interpolation nonsense |
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if fkey.interpolation == "BEZIER": |
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og_frame = fkey.co[0] |
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keyframe.in_tans[idx] = -(value - fkey.handle_left[1]) / (og_frame - fkey.handle_left[0]) / fps / (2 * pi) |
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keyframe.out_tans[idx] = (value - fkey.handle_right[1]) / (og_frame - fkey.handle_right[0]) / fps / (2 * pi) |
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else: |
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keyframe.in_tans[idx] = 0.0 |
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keyframe.out_tans[idx] = 0.0 |
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if keyframe.in_tans[idx] != 0.0 or keyframe.out_tans[idx] != 0.0: |
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bez_chans.add(idx) |
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# Return the keyframes in a sequence sorted by frame number |
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final_keyframes = [keyframes[i] for i in sorted(keyframes)] |
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return (final_keyframes, bez_chans) |
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@property |
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def _mgr(self): |
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return self._exporter().mgr
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