forked from bartvdbraak/blender
248 lines
7.6 KiB
Python
248 lines
7.6 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program 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 this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8-80 compliant>
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__all__ = (
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"bake_action",
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)
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import bpy
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def bake_action(frame_start,
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frame_end,
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frame_step=1,
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only_selected=False,
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do_pose=True,
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do_object=True,
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do_constraint_clear=False,
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do_clean=False,
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action=None,
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):
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"""
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Return an image from the file path with options to search multiple paths
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and return a placeholder if its not found.
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:arg frame_start: First frame to bake.
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:type frame_start: int
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:arg frame_end: Last frame to bake.
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:type frame_end: int
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:arg frame_step: Frame step.
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:type frame_step: int
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:arg only_selected: Only bake selected data.
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:type only_selected: bool
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:arg do_pose: Bake pose channels.
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:type do_pose: bool
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:arg do_object: Bake objects.
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:type do_object: bool
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:arg do_constraint_clear: Remove constraints.
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:type do_constraint_clear: bool
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:arg do_clean: Remove redundant keyframes after baking.
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:type do_clean: bool
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:arg action: An action to bake the data into, or None for a new action
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to be created.
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:type action: :class:`bpy.types.Action` or None
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:return: an action or None
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:rtype: :class:`bpy.types.Action`
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"""
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# -------------------------------------------------------------------------
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# Helper Functions
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def pose_frame_info(obj):
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from mathutils import Matrix
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info = {}
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pose = obj.pose
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pose_items = pose.bones.items()
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for name, pbone in pose_items:
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binfo = {}
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bone = pbone.bone
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binfo["parent"] = getattr(bone.parent, "name", None)
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binfo["bone"] = bone
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binfo["pbone"] = pbone
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binfo["matrix_local"] = bone.matrix_local.copy()
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try:
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binfo["matrix_local_inv"] = binfo["matrix_local"].inverted()
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except:
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binfo["matrix_local_inv"] = Matrix()
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binfo["matrix"] = bone.matrix.copy()
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binfo["matrix_pose"] = pbone.matrix.copy()
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try:
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binfo["matrix_pose_inv"] = binfo["matrix_pose"].inverted()
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except:
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binfo["matrix_pose_inv"] = Matrix()
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info[name] = binfo
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for name, pbone in pose_items:
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binfo = info[name]
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binfo_parent = binfo.get("parent", None)
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if binfo_parent:
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binfo_parent = info[binfo_parent]
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matrix = binfo["matrix_pose"]
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rest_matrix = binfo["matrix_local"]
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if binfo_parent:
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matrix = binfo_parent["matrix_pose_inv"] * matrix
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rest_matrix = binfo_parent["matrix_local_inv"] * rest_matrix
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binfo["matrix_key"] = rest_matrix.inverted() * matrix
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return info
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def obj_frame_info(obj):
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info = {}
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# parent = obj.parent
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info["matrix_key"] = obj.matrix_local.copy()
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return info
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# -------------------------------------------------------------------------
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# Setup the Context
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# TODO, pass data rather then grabbing from the context!
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scene = bpy.context.scene
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obj = bpy.context.object
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pose = obj.pose
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frame_back = scene.frame_current
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if pose is None:
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do_pose = False
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if do_pose is None and do_object is None:
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return None
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pose_info = []
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obj_info = []
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frame_range = range(frame_start, frame_end + 1, frame_step)
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# -------------------------------------------------------------------------
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# Collect transformations
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# could speed this up by applying steps here too...
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for f in frame_range:
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scene.frame_set(f)
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if do_pose:
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pose_info.append(pose_frame_info(obj))
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if do_object:
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obj_info.append(obj_frame_info(obj))
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f += 1
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# -------------------------------------------------------------------------
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# Create action
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# in case animation data hasn't been created
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atd = obj.animation_data_create()
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if action is None:
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action = bpy.data.actions.new("Action")
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atd.action = action
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if do_pose:
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pose_items = pose.bones.items()
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else:
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pose_items = [] # skip
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# -------------------------------------------------------------------------
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# Apply transformations to action
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# pose
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for name, pbone in (pose_items if do_pose else ()):
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if only_selected and not pbone.bone.select:
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continue
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if do_constraint_clear:
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while pbone.constraints:
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pbone.constraints.remove(pbone.constraints[0])
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for f in frame_range:
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f_step = (f - frame_start) // frame_step
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matrix = pose_info[f_step][name]["matrix_key"]
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# pbone.location = matrix.to_translation()
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# pbone.rotation_quaternion = matrix.to_quaternion()
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pbone.matrix_basis = matrix
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pbone.keyframe_insert("location", -1, f, name)
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rotation_mode = pbone.rotation_mode
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if rotation_mode == 'QUATERNION':
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pbone.keyframe_insert("rotation_quaternion", -1, f, name)
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elif rotation_mode == 'AXIS_ANGLE':
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pbone.keyframe_insert("rotation_axis_angle", -1, f, name)
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else: # euler, XYZ, ZXY etc
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pbone.keyframe_insert("rotation_euler", -1, f, name)
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pbone.keyframe_insert("scale", -1, f, name)
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# object. TODO. multiple objects
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if do_object:
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if do_constraint_clear:
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while obj.constraints:
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obj.constraints.remove(obj.constraints[0])
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for f in frame_range:
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matrix = obj_info[(f - frame_start) // frame_step]["matrix_key"]
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obj.matrix_local = matrix
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obj.keyframe_insert("location", -1, f)
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rotation_mode = obj.rotation_mode
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if rotation_mode == 'QUATERNION':
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obj.keyframe_insert("rotation_quaternion", -1, f)
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elif rotation_mode == 'AXIS_ANGLE':
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obj.keyframe_insert("rotation_axis_angle", -1, f)
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else: # euler, XYZ, ZXY etc
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obj.keyframe_insert("rotation_euler", -1, f)
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obj.keyframe_insert("scale", -1, f)
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scene.frame_set(frame_back)
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# -------------------------------------------------------------------------
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# Clean
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if do_clean:
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for fcu in action.fcurves:
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keyframe_points = fcu.keyframe_points
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i = 1
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while i < len(fcu.keyframe_points) - 1:
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val_prev = keyframe_points[i - 1].co[1]
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val_next = keyframe_points[i + 1].co[1]
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val = keyframe_points[i].co[1]
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if abs(val - val_prev) + abs(val - val_next) < 0.0001:
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keyframe_points.remove(keyframe_points[i])
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else:
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i += 1
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return action
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