2011-06-25 23:50:50 +00:00
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# ##### 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 compliant>
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2011-06-02 17:19:07 +00:00
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import bpy
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from mathutils import *
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from math import radians, acos
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2011-06-09 12:30:24 +00:00
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2011-07-09 21:52:25 +00:00
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def hasIKConstraint(pose_bone):
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#utility function / predicate, returns True if given bone has IK constraint
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ik = [constraint for constraint in pose_bone.constraints if constraint.type == "IK"]
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if ik:
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return ik[0]
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else:
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return False
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2011-06-24 17:11:54 +00:00
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2011-06-25 23:50:50 +00:00
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2011-07-06 14:19:54 +00:00
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def createDictionary(perf_arm, end_arm):
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2011-07-09 21:52:25 +00:00
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# clear any old data
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for end_bone in end_arm.bones:
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for mapping in end_bone.reverseMap:
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end_bone.reverseMap.remove(0)
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for perf_bone in perf_arm.bones:
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#find its match and add perf_bone to the match's mapping
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if perf_bone.map:
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end_bone = end_arm.bones[perf_bone.map]
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newMap = end_bone.reverseMap.add()
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newMap.name = perf_bone.name
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2011-07-06 13:31:13 +00:00
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#root is the root of the enduser
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root = end_arm.bones[0].name
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feetBones = [bone.name for bone in perf_arm.bones if bone.foot]
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2011-07-09 21:52:25 +00:00
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return feetBones, root
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2011-06-02 17:19:07 +00:00
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# list of empties created to keep track of "original"
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# position data
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# in final product, these locations can be stored as custom props
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2011-06-09 12:30:24 +00:00
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# these help with constraining, etc.
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2011-06-02 17:19:07 +00:00
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#creation of intermediate armature
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# the intermediate armature has the hiearchy of the end user,
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# does not have rotation inheritence
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# and bone roll is identical to the performer
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# its purpose is to copy over the rotations
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# easily while concentrating on the hierarchy changes
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2011-06-25 23:50:50 +00:00
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2011-07-09 21:52:25 +00:00
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def createIntermediate(performer_obj, enduser_obj, root, s_frame, e_frame, scene):
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2011-06-02 17:19:07 +00:00
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#creates and keyframes an empty with its location
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#the original position of the tail bone
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#useful for storing the important data in the original motion
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2011-06-24 17:11:54 +00:00
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#i.e. using this empty to IK the chain to that pos / DEBUG
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2011-06-25 23:50:50 +00:00
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2011-06-02 17:19:07 +00:00
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#Simple 1to1 retarget of a bone
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2011-06-25 23:50:50 +00:00
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def singleBoneRetarget(inter_bone, perf_bone):
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perf_world_rotation = perf_bone.matrix * performer_obj.matrix_world
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2011-06-02 17:19:07 +00:00
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inter_world_base_rotation = inter_bone.bone.matrix_local * inter_obj.matrix_world
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inter_world_base_inv = Matrix(inter_world_base_rotation)
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inter_world_base_inv.invert()
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return (inter_world_base_inv.to_3x3() * perf_world_rotation.to_3x3()).to_4x4()
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2011-06-25 23:50:50 +00:00
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#uses 1to1 and interpolation/averaging to match many to 1 retarget
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def manyPerfToSingleInterRetarget(inter_bone, performer_bones_s):
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retarget_matrices = [singleBoneRetarget(inter_bone, perf_bone) for perf_bone in performer_bones_s]
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2011-06-02 17:19:07 +00:00
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lerp_matrix = Matrix()
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2011-06-25 23:50:50 +00:00
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for i in range(len(retarget_matrices) - 1):
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2011-06-02 17:19:07 +00:00
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first_mat = retarget_matrices[i]
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2011-06-25 23:50:50 +00:00
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next_mat = retarget_matrices[i + 1]
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lerp_matrix = first_mat.lerp(next_mat, 0.5)
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2011-06-02 17:19:07 +00:00
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return lerp_matrix
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2011-06-25 23:50:50 +00:00
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#determines the type of hierachy change needed and calls the
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#right function
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2011-06-02 17:19:07 +00:00
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def retargetPerfToInter(inter_bone):
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2011-07-09 21:52:25 +00:00
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if inter_bone.bone.reverseMap:
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perf_bone_name = inter_bone.bone.reverseMap
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2011-07-06 14:19:54 +00:00
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# 1 to many not supported yet
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2011-06-02 17:19:07 +00:00
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# then its either a many to 1 or 1 to 1
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2011-07-09 21:52:25 +00:00
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if len(perf_bone_name) > 1:
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performer_bones_s = [performer_bones[map.name] for map in perf_bone_name]
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#we need to map several performance bone to a single
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inter_bone.matrix_basis = manyPerfToSingleInterRetarget(inter_bone, performer_bones_s)
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else:
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perf_bone = performer_bones[perf_bone_name[0].name]
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inter_bone.matrix_basis = singleBoneRetarget(inter_bone, perf_bone)
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2011-06-25 23:50:50 +00:00
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2011-06-02 17:19:07 +00:00
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inter_bone.keyframe_insert("rotation_quaternion")
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for child in inter_bone.children:
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retargetPerfToInter(child)
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2011-06-25 23:50:50 +00:00
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#creates the intermediate armature object
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inter_obj = enduser_obj.copy()
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inter_obj.data = inter_obj.data.copy() # duplicate data
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bpy.context.scene.objects.link(inter_obj)
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inter_obj.name = "intermediate"
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bpy.context.scene.objects.active = inter_obj
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2011-06-02 17:19:07 +00:00
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bpy.ops.object.mode_set(mode='EDIT')
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2011-06-25 23:50:50 +00:00
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#resets roll
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2011-06-02 17:19:07 +00:00
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bpy.ops.armature.calculate_roll(type='Z')
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bpy.ops.object.mode_set(mode="OBJECT")
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2011-06-25 23:50:50 +00:00
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inter_obj.data.name = "inter_arm"
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inter_arm = inter_obj.data
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2011-06-02 17:19:07 +00:00
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performer_bones = performer_obj.pose.bones
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2011-06-25 23:50:50 +00:00
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inter_bones = inter_obj.pose.bones
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2011-06-02 17:19:07 +00:00
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#clears inheritance
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for inter_bone in inter_bones:
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inter_bone.bone.use_inherit_rotation = False
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2011-06-25 23:50:50 +00:00
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for t in range(s_frame, e_frame):
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2011-06-02 17:19:07 +00:00
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scene.frame_set(t)
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2011-06-17 11:47:45 +00:00
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inter_bone = inter_bones[root]
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2011-06-02 17:19:07 +00:00
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retargetPerfToInter(inter_bone)
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2011-06-25 23:50:50 +00:00
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2011-07-09 21:52:25 +00:00
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return inter_obj
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2011-06-09 12:30:24 +00:00
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# this procedure copies the rotations over from the intermediate
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# armature to the end user one.
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2011-06-25 23:50:50 +00:00
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# As the hierarchies are 1 to 1, this is a simple matter of
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2011-06-09 12:30:24 +00:00
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# copying the rotation, while keeping in mind bone roll, parenting, etc.
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# TODO: Control Bones: If a certain bone is constrained in a way
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# that its rotation is determined by another (a control bone)
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# We should determine the right pos of the control bone.
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2011-06-25 23:50:50 +00:00
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# Scale: ? Should work but needs testing.
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def retargetEnduser(inter_obj, enduser_obj, root, s_frame, e_frame, scene):
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inter_bones = inter_obj.pose.bones
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2011-06-09 12:30:24 +00:00
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end_bones = enduser_obj.pose.bones
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2011-06-25 23:50:50 +00:00
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2011-06-09 12:30:24 +00:00
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def bakeTransform(end_bone):
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src_bone = inter_bones[end_bone.name]
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trg_bone = end_bone
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bake_matrix = src_bone.matrix
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rest_matrix = trg_bone.bone.matrix_local
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2011-06-25 23:50:50 +00:00
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2011-06-09 12:30:24 +00:00
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if trg_bone.parent and trg_bone.bone.use_inherit_rotation:
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parent_mat = src_bone.parent.matrix
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parent_rest = trg_bone.parent.bone.matrix_local
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parent_rest_inv = parent_rest.copy()
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parent_rest_inv.invert()
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parent_mat_inv = parent_mat.copy()
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parent_mat_inv.invert()
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bake_matrix = parent_mat_inv * bake_matrix
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rest_matrix = parent_rest_inv * rest_matrix
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2011-06-25 23:50:50 +00:00
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2011-06-09 12:30:24 +00:00
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rest_matrix_inv = rest_matrix.copy()
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rest_matrix_inv.invert()
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bake_matrix = rest_matrix_inv * bake_matrix
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trg_bone.matrix_basis = bake_matrix
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2011-07-09 21:52:25 +00:00
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rot_mode = end_bone.rotation_mode
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if rot_mode == "QUATERNION":
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end_bone.keyframe_insert("rotation_quaternion")
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elif rot_mode == "AXIS_ANGLE":
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end_bone.keyframe_insert("rotation_axis_angle")
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else:
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end_bone.keyframe_insert("rotation_euler")
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2011-06-25 23:50:50 +00:00
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2011-06-09 12:30:24 +00:00
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for bone in end_bone.children:
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bakeTransform(bone)
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2011-06-25 23:50:50 +00:00
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for t in range(s_frame, e_frame):
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2011-06-09 12:30:24 +00:00
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scene.frame_set(t)
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2011-06-17 11:47:45 +00:00
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end_bone = end_bones[root]
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2011-07-05 10:56:34 +00:00
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end_bone.location = Vector((0, 0, 0))
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2011-07-03 21:23:41 +00:00
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end_bone.keyframe_insert("location")
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2011-06-09 12:30:24 +00:00
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bakeTransform(end_bone)
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2011-06-17 11:47:45 +00:00
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#recieves the performer feet bones as a variable
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# by "feet" I mean those bones that have plants
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# (they don't move, despite root moving) somewhere in the animation.
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2011-06-25 23:50:50 +00:00
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2011-07-09 21:52:25 +00:00
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def copyTranslation(performer_obj, enduser_obj, perfFeet, root, s_frame, e_frame, scene, enduser_obj_mat):
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2011-07-06 14:19:54 +00:00
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2011-06-17 11:47:45 +00:00
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perf_bones = performer_obj.pose.bones
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end_bones = enduser_obj.pose.bones
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2011-06-25 23:50:50 +00:00
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2011-07-09 21:52:25 +00:00
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perfRoot = end_bones[root].bone.reverseMap[0].name
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endFeet = [perf_bones[perfBone].bone.map for perfBone in perfFeet]
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2011-07-06 13:31:13 +00:00
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locDictKeys = perfFeet + endFeet + [perfRoot]
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2011-07-06 14:19:54 +00:00
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2011-06-17 11:47:45 +00:00
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def tailLoc(bone):
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2011-06-25 23:50:50 +00:00
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return bone.center + (bone.vector / 2)
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2011-06-17 11:47:45 +00:00
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#Step 1 - we create a dict that contains these keys:
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#(Performer) Hips, Feet
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#(End user) Feet
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2011-07-09 21:52:25 +00:00
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# where the values are their world position on each frame in range (s,e)
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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locDict = {}
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for key in locDictKeys:
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2011-06-25 23:50:50 +00:00
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locDict[key] = []
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for t in range(scene.frame_start, scene.frame_end):
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2011-06-17 11:47:45 +00:00
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scene.frame_set(t)
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for bone in perfFeet:
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locDict[bone].append(tailLoc(perf_bones[bone]))
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locDict[perfRoot].append(tailLoc(perf_bones[perfRoot]))
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for bone in endFeet:
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locDict[bone].append(tailLoc(end_bones[bone]))
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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# now we take our locDict and analyze it.
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2011-06-25 23:50:50 +00:00
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# we need to derive all chains
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2011-06-17 11:47:45 +00:00
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locDeriv = {}
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for key in locDictKeys:
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locDeriv[key] = []
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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for key in locDict.keys():
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graph = locDict[key]
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2011-07-09 21:52:25 +00:00
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locDeriv[key] = [graph[t + 1] - graph[t] for t in range(len(graph) - 1)]
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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# now find the plant frames, where perfFeet don't move much
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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linearAvg = []
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2011-06-25 23:50:50 +00:00
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2011-06-17 11:47:45 +00:00
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for key in perfFeet:
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2011-06-25 23:50:50 +00:00
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for i in range(len(locDeriv[key]) - 1):
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2011-06-17 11:47:45 +00:00
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v = locDeriv[key][i]
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hipV = locDeriv[perfRoot][i]
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2011-07-09 21:52:25 +00:00
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endV = locDeriv[perf_bones[key].bone.map][i]
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2011-06-25 23:50:50 +00:00
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if (v.length < 0.1):
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2011-06-17 11:47:45 +00:00
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#this is a plant frame.
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#lets see what the original hip delta is, and the corresponding
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#end bone's delta
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2011-06-25 23:50:50 +00:00
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if endV.length != 0:
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linearAvg.append(hipV.length / endV.length)
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2011-07-02 18:24:05 +00:00
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2011-06-27 12:48:30 +00:00
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bpy.ops.object.add()
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stride_bone = bpy.context.active_object
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stride_bone.name = "stride_bone"
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2011-07-02 18:24:05 +00:00
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2011-06-17 11:47:45 +00:00
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if linearAvg:
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2011-06-25 23:50:50 +00:00
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avg = sum(linearAvg) / len(linearAvg)
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2011-07-03 21:23:41 +00:00
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scene.frame_set(s_frame)
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initialPos = (tailLoc(perf_bones[perfRoot]) / avg)
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2011-06-25 23:50:50 +00:00
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for t in range(s_frame, e_frame):
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scene.frame_set(t)
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newTranslation = (tailLoc(perf_bones[perfRoot]) / avg)
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2011-07-03 21:23:41 +00:00
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stride_bone.location = (newTranslation - initialPos) * enduser_obj_mat
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2011-06-24 17:11:54 +00:00
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stride_bone.keyframe_insert("location")
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2011-06-27 12:48:30 +00:00
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return stride_bone
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2011-06-24 17:11:54 +00:00
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2011-06-17 11:47:45 +00:00
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2011-07-09 21:52:25 +00:00
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def IKRetarget(performer_obj, enduser_obj, s_frame, e_frame, scene):
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2011-06-26 19:54:29 +00:00
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end_bones = enduser_obj.pose.bones
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for pose_bone in end_bones:
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2011-07-09 21:52:25 +00:00
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ik_constraint = hasIKConstraint(pose_bone)
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if ik_constraint:
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2011-07-06 14:19:54 +00:00
|
|
|
target_is_bone = False
|
2011-06-26 19:54:29 +00:00
|
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|
# set constraint target to corresponding empty if targetless,
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|
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# if not, keyframe current target to corresponding empty
|
2011-07-09 21:52:25 +00:00
|
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|
perf_bone = pose_bone.bone.reverseMap[-1].name
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2011-07-06 14:19:54 +00:00
|
|
|
orgLocTrg = originalLocationTarget(pose_bone)
|
2011-06-26 19:54:29 +00:00
|
|
|
if not ik_constraint.target:
|
2011-07-06 14:19:54 +00:00
|
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|
ik_constraint.target = orgLocTrg
|
|
|
|
target = orgLocTrg
|
|
|
|
|
|
|
|
# There is a target now
|
|
|
|
if ik_constraint.subtarget:
|
|
|
|
target = ik_constraint.target.pose.bones[ik_constraint.subtarget]
|
|
|
|
target.bone.use_local_location = False
|
|
|
|
target_is_bone = True
|
2011-06-26 19:54:29 +00:00
|
|
|
else:
|
2011-07-06 14:19:54 +00:00
|
|
|
target = ik_constraint.target
|
|
|
|
|
|
|
|
for t in range(s_frame, e_frame):
|
|
|
|
scene.frame_set(t)
|
|
|
|
if target_is_bone:
|
|
|
|
final_loc = pose_bone.tail - target.bone.matrix_local.to_translation()
|
2011-06-26 19:54:29 +00:00
|
|
|
else:
|
2011-07-06 14:19:54 +00:00
|
|
|
final_loc = pose_bone.tail
|
|
|
|
target.location = final_loc
|
|
|
|
target.keyframe_insert("location")
|
2011-06-26 19:54:29 +00:00
|
|
|
ik_constraint.mute = False
|
|
|
|
|
|
|
|
|
|
|
|
def turnOffIK(enduser_obj):
|
|
|
|
end_bones = enduser_obj.pose.bones
|
|
|
|
for pose_bone in end_bones:
|
|
|
|
if pose_bone.is_in_ik_chain:
|
|
|
|
pass
|
|
|
|
# TODO:
|
|
|
|
# set stiffness according to place on chain
|
|
|
|
# and values from analysis that is stored in the bone
|
|
|
|
#pose_bone.ik_stiffness_x = 0.5
|
|
|
|
#pose_bone.ik_stiffness_y = 0.5
|
|
|
|
#pose_bone.ik_stiffness_z = 0.5
|
2011-07-09 21:52:25 +00:00
|
|
|
ik_constraint = hasIKConstraint(pose_bone)
|
|
|
|
if ik_constraint:
|
2011-06-26 19:54:29 +00:00
|
|
|
ik_constraint.mute = True
|
|
|
|
|
2011-07-02 18:24:05 +00:00
|
|
|
|
|
|
|
def cleanAndStoreObjMat(performer_obj, enduser_obj):
|
2011-06-27 12:48:30 +00:00
|
|
|
perf_obj_mat = performer_obj.matrix_world.copy()
|
|
|
|
enduser_obj_mat = enduser_obj.matrix_world.copy()
|
2011-07-02 18:24:05 +00:00
|
|
|
zero_mat = Matrix() # Matrix(((0,0,0,0),(0,0,0,0),(0,0,0,0),(0,0,0,0)))
|
2011-06-27 12:48:30 +00:00
|
|
|
performer_obj.matrix_world = zero_mat
|
|
|
|
enduser_obj.matrix_world = zero_mat
|
|
|
|
return perf_obj_mat, enduser_obj_mat
|
|
|
|
|
2011-07-02 18:24:05 +00:00
|
|
|
|
|
|
|
def restoreObjMat(performer_obj, enduser_obj, perf_obj_mat, enduser_obj_mat, stride_bone):
|
|
|
|
pose_bones = enduser_obj.pose.bones
|
|
|
|
for pose_bone in pose_bones:
|
|
|
|
if pose_bone.name + "Org" in bpy.data.objects:
|
|
|
|
empty = bpy.data.objects[pose_bone.name + "Org"]
|
2011-07-03 21:23:41 +00:00
|
|
|
empty.parent = stride_bone
|
2011-06-27 12:48:30 +00:00
|
|
|
performer_obj.matrix_world = perf_obj_mat
|
|
|
|
enduser_obj.matrix_world = enduser_obj_mat
|
2011-07-04 11:35:29 +00:00
|
|
|
enduser_obj.parent = stride_bone
|
2011-06-26 19:54:29 +00:00
|
|
|
|
2011-07-02 18:24:05 +00:00
|
|
|
|
2011-07-06 14:19:54 +00:00
|
|
|
def originalLocationTarget(end_bone):
|
|
|
|
if not end_bone.name + "Org" in bpy.data.objects:
|
|
|
|
bpy.ops.object.add()
|
|
|
|
empty = bpy.context.active_object
|
|
|
|
empty.name = end_bone.name + "Org"
|
|
|
|
empty.empty_draw_size = 0.1
|
|
|
|
#empty.parent = enduser_obj
|
|
|
|
empty = bpy.data.objects[end_bone.name + "Org"]
|
|
|
|
return empty
|
|
|
|
|
|
|
|
|
2011-07-09 21:52:25 +00:00
|
|
|
def NLASystemInitialize(enduser_obj, s_frame):
|
2011-07-07 20:46:35 +00:00
|
|
|
anim_data = enduser_obj.animation_data
|
|
|
|
mocapAction = anim_data.action
|
2011-07-09 21:52:25 +00:00
|
|
|
mocapAction.name = "Base Mocap"
|
2011-07-07 20:46:35 +00:00
|
|
|
anim_data.use_nla = True
|
|
|
|
mocapTrack = anim_data.nla_tracks.new()
|
|
|
|
mocapTrack.name = "Base Mocap Track"
|
2011-07-09 21:52:25 +00:00
|
|
|
mocapStrip = mocapTrack.strips.new("Base Mocap", s_frame, mocapAction)
|
2011-07-07 20:46:35 +00:00
|
|
|
constraintTrack = anim_data.nla_tracks.new()
|
|
|
|
constraintTrack.name = "Mocap constraints"
|
2011-07-09 21:52:25 +00:00
|
|
|
constraintAction = bpy.data.actions.new("Mocap constraints")
|
|
|
|
constraintStrip = constraintTrack.strips.new("Mocap constraints", s_frame, constraintAction)
|
2011-07-07 20:46:35 +00:00
|
|
|
anim_data.nla_tracks.active = constraintTrack
|
|
|
|
anim_data.action = constraintAction
|
|
|
|
|
2011-06-25 23:50:50 +00:00
|
|
|
|
2011-07-09 21:52:25 +00:00
|
|
|
def totalRetarget(performer_obj, enduser_obj, scene, s_frame, e_frame):
|
|
|
|
perf_arm = performer_obj.data
|
|
|
|
end_arm = enduser_obj.data
|
|
|
|
feetBones, root = createDictionary(perf_arm, end_arm)
|
|
|
|
perf_obj_mat, enduser_obj_mat = cleanAndStoreObjMat(performer_obj, enduser_obj)
|
|
|
|
turnOffIK(enduser_obj)
|
|
|
|
inter_obj = createIntermediate(performer_obj, enduser_obj, root, s_frame, e_frame, scene)
|
|
|
|
retargetEnduser(inter_obj, enduser_obj, root, s_frame, e_frame, scene)
|
|
|
|
stride_bone = copyTranslation(performer_obj, enduser_obj, feetBones, root, s_frame, e_frame, scene, enduser_obj_mat)
|
|
|
|
IKRetarget(performer_obj, enduser_obj, s_frame, e_frame, scene)
|
|
|
|
restoreObjMat(performer_obj, enduser_obj, perf_obj_mat, enduser_obj_mat, stride_bone)
|
|
|
|
bpy.ops.object.mode_set(mode='OBJECT')
|
|
|
|
bpy.ops.object.select_name(name=inter_obj.name, extend=False)
|
|
|
|
bpy.ops.object.delete()
|
|
|
|
NLASystemInitialize(enduser_obj, s_frame)
|
|
|
|
|
|
|
|
|
2011-06-25 23:50:50 +00:00
|
|
|
if __name__ == "__main__":
|
2011-07-05 10:56:34 +00:00
|
|
|
totalRetarget()
|