# ##### BEGIN GPL LICENSE BLOCK ##### # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # # ##### END GPL LICENSE BLOCK ##### import bpy from functools import reduce from Mathutils import Vector # TODO, have these in a more general module from rna_prop_ui import rna_idprop_ui_get, rna_idprop_ui_prop_get empty_layer = [False] * 16 def gen_none(obj, orig_bone_name): pass def get_bone_data(obj, bone_name): arm = obj.data pbone = obj.pose.bones[bone_name] if obj.mode == 'EDIT': bone = arm.edit_bones[bone_name] else: bone = arm.bones[bone_name] return arm, pbone, bone def bone_basename(name): return name.split(".")[0] def copy_bone_simple(arm, from_bone, name): ebone = arm.edit_bones[from_bone] ebone_new = arm.edit_bones.new(name) ebone_new.head = ebone.head ebone_new.tail = ebone.tail ebone_new.roll = ebone.roll return ebone_new def add_stretch_to(obj, from_name, to_name, name): ''' Adds a bone that stretches from one to another ''' mode_orig = obj.mode bpy.ops.object.mode_set(mode='EDIT') arm = obj.data stretch_ebone = arm.edit_bones.new(name) stretch_name = stretch_ebone.name del name head = stretch_ebone.head = arm.edit_bones[from_name].head.copy() #tail = stretch_ebone.tail = arm.edit_bones[to_name].head.copy() # annoying exception for zero length bones, since its using stretch_to the rest pose doesnt really matter #if (head - tail).length < 0.1: if 1: tail = stretch_ebone.tail = arm.edit_bones[from_name].tail.copy() # Now for the constraint bpy.ops.object.mode_set(mode='OBJECT') from_pbone = obj.pose.bones[from_name] to_pbone = obj.pose.bones[to_name] stretch_pbone = obj.pose.bones[stretch_name] con = stretch_pbone.constraints.new('COPY_LOCATION') con.target = obj con.subtarget = from_name con = stretch_pbone.constraints.new('STRETCH_TO') con.target = obj con.subtarget = to_name con.original_length = (head - tail).length con.keep_axis = 'PLANE_X' con.volume = 'NO_VOLUME' bpy.ops.object.mode_set(mode=mode_orig) def add_pole_target_bone(obj, base_name, name, mode='CROSS'): ''' Does not actually create a poll target, just the bone to use as a poll target ''' mode_orig = obj.mode bpy.ops.object.mode_set(mode='EDIT') arm = obj.data poll_ebone = arm.edit_bones.new(base_name + "_poll") base_ebone = arm.edit_bones[base_name] poll_name = poll_ebone.name parent_ebone = base_ebone.parent base_head = base_ebone.head.copy() base_tail = base_ebone.tail.copy() base_dir = base_head - base_tail parent_head = parent_ebone.head.copy() parent_tail = parent_ebone.tail.copy() parent_dir = parent_head - parent_tail distance = (base_dir.length + parent_dir.length) if mode == 'CROSS': offset = base_dir.copy().normalize() - parent_dir.copy().normalize() offset.length = distance else: offset = Vector(0,0,0) if mode[0]=="+": val = distance else: val = -distance setattr(offset, mode[1].lower(), val) poll_ebone.head = base_head + offset poll_ebone.tail = base_head + (offset * (1.0 - (1.0 / 4.0))) bpy.ops.object.mode_set(mode=mode_orig) return poll_name def gen_finger(obj, orig_bone_name): # *** EDITMODE # get assosiated data arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name) obj.animation_data_create() # needed if its a new armature with no keys arm.layer[0] = arm.layer[8] = True children = orig_pbone.children_recursive tot_len = reduce(lambda f, pbone: f + pbone.bone.length, children, orig_pbone.bone.length) base_name = bone_basename(orig_pbone.name) # first make a new bone at the location of the finger control_ebone = arm.edit_bones.new(base_name) control_bone_name = control_ebone.name # we dont know if we get the name requested # Place the finger bone head = orig_ebone.head.copy() tail = orig_ebone.tail.copy() control_ebone.head = head control_ebone.tail = head + ((tail - head).normalize() * tot_len) control_ebone.roll = orig_ebone.roll # now add bones inbetween this and its children recursively # switching modes so store names only! children = [pbone.name for pbone in children] # set an alternate layer for driver bones other_layer = empty_layer[:] other_layer[8] = True driver_bone_pairs = [] for child_bone_name in children: arm, pbone_child, child_ebone = get_bone_data(obj, child_bone_name) # finger.02 --> finger_driver.02 driver_bone_name = child_bone_name.split('.') driver_bone_name = driver_bone_name[0] + "_driver." + ".".join(driver_bone_name[1:]) driver_ebone = arm.edit_bones.new(driver_bone_name) driver_bone_name = driver_ebone.name # cant be too sure! driver_ebone.layer = other_layer new_len = pbone_child.bone.length / 2.0 head = child_ebone.head.copy() tail = child_ebone.tail.copy() driver_ebone.head = head driver_ebone.tail = head + ((tail - head).normalize() * new_len) driver_ebone.roll = child_ebone.roll # Insert driver_ebone in the chain without connected parents driver_ebone.connected = False driver_ebone.parent = child_ebone.parent child_ebone.connected = False child_ebone.parent = driver_ebone # Add the drivers to these when in posemode. driver_bone_pairs.append((child_bone_name, driver_bone_name)) del control_ebone # *** POSEMODE bpy.ops.object.mode_set(mode='OBJECT') arm, orig_pbone, orig_bone = get_bone_data(obj, orig_bone_name) arm, control_pbone, control_bone= get_bone_data(obj, control_bone_name) # only allow Y scale control_pbone.lock_scale = (True, False, True) control_pbone["bend_ratio"] = 0.4 prop = rna_idprop_ui_prop_get(control_pbone, "bend_ratio", create=True) prop["soft_min"] = 0.0 prop["soft_max"] = 1.0 con = orig_pbone.constraints.new('COPY_LOCATION') con.target = obj con.subtarget = control_bone_name con = orig_pbone.constraints.new('COPY_ROTATION') con.target = obj con.subtarget = control_bone_name # setup child drivers on each new smaller bone added. assume 2 for now. # drives the bones controller_path = control_pbone.path_to_id() # 'pose.bones["%s"]' % control_bone_name i = 0 for child_bone_name, driver_bone_name in driver_bone_pairs: # XXX - todo, any number if i==2: break arm, driver_pbone, driver_bone = get_bone_data(obj, driver_bone_name) driver_pbone.rotation_mode = 'YZX' fcurve_driver = driver_pbone.driver_add("rotation_euler", 0) #obj.driver_add('pose.bones["%s"].scale', 1) #obj.animation_data.drivers[-1] # XXX, WATCH THIS driver = fcurve_driver.driver # scale target tar = driver.targets.new() tar.name = "scale" tar.id_type = 'OBJECT' tar.id = obj tar.array_index = 1 # Y scale tar.rna_path = controller_path + '.scale' # bend target tar = driver.targets.new() tar.name = "br" tar.id_type = 'OBJECT' tar.id = obj tar.rna_path = controller_path + '["bend_ratio"]' # XXX - todo, any number if i==0: driver.expression = '(-scale+1.0)*pi*2.0*(1.0-br)' elif i==1: driver.expression = '(-scale+1.0)*pi*2.0*br' arm, child_pbone, child_bone = get_bone_data(obj, child_bone_name) # only allow X rotation driver_pbone.lock_rotation = child_pbone.lock_rotation = (False, True, True) i += 1 def gen_delta(obj, delta_name): ''' Use this bone to define a delta thats applied to its child in pose mode. ''' arm = obj.data mode_orig = obj.mode bpy.ops.object.mode_set(mode='OBJECT') delta_pbone = obj.pose.bones[delta_name] children = delta_pbone.children if len(children) != 1: print("only 1 child supported for delta") child_name = children[0].name arm, child_pbone, child_bone = get_bone_data(obj, child_name) delta_phead = delta_pbone.head.copy() delta_ptail = delta_pbone.tail.copy() delta_pmatrix = delta_pbone.matrix.copy() child_phead = child_pbone.head.copy() child_ptail = child_pbone.tail.copy() child_pmatrix = child_pbone.matrix.copy() children = delta_pbone.children bpy.ops.object.mode_set(mode='EDIT') delta_ebone = arm.edit_bones[delta_name] child_ebone = arm.edit_bones[child_name] delta_head = delta_ebone.head.copy() delta_tail = delta_ebone.tail.copy() # arm, parent_pbone, parent_bone = get_bone_data(obj, delta_name) child_head = child_ebone.head.copy() child_tail = child_ebone.tail.copy() arm.edit_bones.remove(delta_ebone) del delta_ebone # cant use thz bpy.ops.object.mode_set(mode='OBJECT') # Move the child bone to the deltas location obj.animation_data_create() child_pbone = obj.pose.bones[child_name] # ------------------- drivers child_pbone.rotation_mode = 'XYZ' rot = delta_pmatrix.invert().rotationPart() * child_pmatrix.rotationPart() rot = rot.invert().toEuler() fcurve_drivers = child_pbone.driver_add("rotation_euler", -1) for i, fcurve_driver in enumerate(fcurve_drivers): driver = fcurve_driver.driver driver.type = 'AVERAGE' #mod = fcurve_driver.modifiers.new('GENERATOR') mod = fcurve_driver.modifiers[0] mod.poly_order = 1 mod.coefficients[0] = rot[i] mod.coefficients[1] = 0.0 # tricky, find the transform to drive the bone to this location. delta_head_offset = child_pmatrix.rotationPart() * (delta_phead - child_phead) fcurve_drivers = child_pbone.driver_add("location", -1) for i, fcurve_driver in enumerate(fcurve_drivers): driver = fcurve_driver.driver driver.type = 'AVERAGE' #mod = fcurve_driver.modifiers.new('GENERATOR') mod = fcurve_driver.modifiers[0] mod.poly_order = 1 mod.coefficients[0] = delta_head_offset[i] mod.coefficients[1] = 0.0 # arm, parent_pbone, parent_bone = get_bone_data(obj, delta_name) bpy.ops.object.mode_set(mode='EDIT') bpy.ops.object.mode_set(mode=mode_orig) def gen_arm(obj, orig_bone_name): """ the bone with the 'arm' property is the upper arm, this assumes a chain as follows. [shoulder, upper_arm, forearm, hand] ...where this bone is 'upper_arm' there are 3 chains - Original - IK, MCH-%s_ik - IKSwitch, MCH-%s () """ def validate_chain(): ''' Sanity check and return the arm as a list of bone names. ''' # do a sanity check arm, orig_pbone, orig_ebone = get_bone_data(obj, orig_bone_name) shoulder_pbone = orig_pbone.parent if not shoulder_pbone: print("could not find 'arm' parent, skipping:", orig_bone_name) return # We could have some bones attached, find the bone that has this as its 2nd parent hands = [] for pbone in obj.pose.bones: index = pbone.parent_index(orig_pbone) if index == 2: hands.append(pbone) if len(hands) > 1: print("more then 1 hand found on:", orig_bone_name) return # first add the 2 new bones hand_pbone = hands[0] forearm_pbone = hand_pbone.parent return shoulder_pbone.name, orig_pbone.name, forearm_pbone.name, hand_pbone.name arm = obj.data original_chain_tuple = validate_chain() shoulder_name, arm_name, forearm_name, hand_name = original_chain_tuple def chain_ik(prefix="MCH-%s_ik"): arm, arm_pbone, arm_ebone = get_bone_data(obj, arm_name) arm, hand_pbone, hand_ebone = get_bone_data(obj, hand_name) # Add the edit bones hand_ik_ebone = copy_bone_simple(arm, hand_name, prefix % hand_name) hand_ik_name = hand_ik_ebone.name arm_ik_ebone = copy_bone_simple(arm, arm_name, prefix % arm_name) arm_ik_name = arm_ik_ebone.name forearm_ik_ebone = copy_bone_simple(arm, forearm_name, prefix % forearm_name) forearm_ik_name = forearm_ik_ebone.name arm_ik_ebone.parent = arm_ebone.parent forearm_ik_ebone.connected = arm_ebone.connected forearm_ik_ebone.parent = arm_ik_ebone forearm_ik_ebone.connected = True # Add the bone used for the arms poll target pole_ik_name = add_pole_target_bone(obj, forearm_name, "elbow_poll", mode='+Z') bpy.ops.object.mode_set(mode='OBJECT') arm, forearm_ik_pbone, forearm_ik_bone = get_bone_data(obj, forearm_ik_name) con = forearm_ik_pbone.constraints.new('IK') con.target = obj con.subtarget = hand_ik_name con.pole_target = obj con.pole_subtarget = pole_ik_name con.use_tail = True con.use_stretch = True con.use_target = True con.use_rotation = False con.chain_length = 2 con.pole_angle = -90.0 # XXX, RAD2DEG # ID Propery on the hand for IK/FK switch arm, hand_ik_pbone, hand_ik_bone = get_bone_data(obj, hand_ik_name) prop = rna_idprop_ui_prop_get(hand_ik_pbone, "ik", create=True) hand_ik_pbone["ik"] = 0.5 prop["soft_min"] = 0.0 prop["soft_max"] = 1.0 bpy.ops.object.mode_set(mode='EDIT') return None, arm_ik_name, forearm_ik_name, hand_ik_name, pole_ik_name ik_chain_tuple = chain_ik() def chain_switch(prefix="MCH-%s"): arm_sw_ebone = copy_bone_simple(arm, arm_name, prefix % arm_name) arm_sw_name = arm_sw_ebone.name forearm_sw_ebone = copy_bone_simple(arm, forearm_name, prefix % forearm_name) forearm_sw_name = forearm_sw_ebone.name forearm_sw_ebone.parent = arm_sw_ebone forearm_sw_ebone.connected = arm.edit_bones[forearm_name].connected hand_sw_ebone = copy_bone_simple(arm, hand_name, prefix % hand_name) hand_sw_name = hand_sw_ebone.name hand_sw_ebone.parent = forearm_sw_ebone hand_sw_ebone.connected = arm.edit_bones[hand_name].connected bpy.ops.object.mode_set(mode='OBJECT') # Add constraints arm_sw_pbone = obj.pose.bones[arm_sw_name] forearm_sw_pbone = obj.pose.bones[forearm_sw_name] hand_sw_pbone = obj.pose.bones[hand_sw_name] dummy, arm_ik_name, forearm_ik_name, hand_ik_name, pole_ik_name = ik_chain_tuple ik_driver_path = obj.pose.bones[hand_ik_name].path_to_id() + '["ik"]' def ik_fk_driver(con): ''' 3 bones use this for ik/fk switching ''' fcurve = con.driver_add("influence", 0) driver = fcurve.driver tar = driver.targets.new() driver.type = 'AVERAGE' tar.name = "ik" tar.id_type = 'OBJECT' tar.id = obj tar.rna_path = ik_driver_path # *********** con = arm_sw_pbone.constraints.new('COPY_ROTATION') con.name = "FK" con.target = obj con.subtarget = arm_name con = arm_sw_pbone.constraints.new('COPY_ROTATION') con.target = obj con.subtarget = arm_ik_name con.influence = 0.5 ik_fk_driver(con) # *********** con = forearm_sw_pbone.constraints.new('COPY_ROTATION') con.name = "FK" con.target = obj con.subtarget = forearm_name con = forearm_sw_pbone.constraints.new('COPY_ROTATION') con.name = "IK" con.target = obj con.subtarget = forearm_ik_name con.influence = 0.5 ik_fk_driver(con) # *********** con = hand_sw_pbone.constraints.new('COPY_ROTATION') con.name = "FK" con.target = obj con.subtarget = hand_name con = hand_sw_pbone.constraints.new('COPY_ROTATION') con.name = "IK" con.target = obj con.subtarget = hand_ik_name con.influence = 0.5 ik_fk_driver(con) add_stretch_to(obj, forearm_sw_name, pole_ik_name, "VIS-elbow_ik_poll") add_stretch_to(obj, hand_sw_name, hand_ik_name, "VIS-hand_ik") bpy.ops.object.mode_set(mode='EDIT') return None, arm_sw_name, forearm_sw_name, hand_sw_name switch_chain_tuple = chain_switch() gen_table = { "":gen_none, \ "finger":gen_finger, \ "delta":gen_delta, \ "arm":gen_arm, \ } def generate_rig(context, ob): # add_stretch_to(ob, "a", "b", "c") bpy.ops.object.mode_set(mode='OBJECT') # copy object and data ob.selected = False ob_new = ob.copy() ob_new.data = ob.data.copy() scene = context.scene scene.objects.link(ob_new) scene.objects.active = ob_new ob_new.selected = True # enter armature editmode for pbone_name in ob_new.pose.bones.keys(): bone_type = ob_new.pose.bones[pbone_name].get("type", "") try: func = gen_table[bone_type] except KeyError: print("\tunknown type '%s', bone '%s'" % (bone_type, pbone_name)) # Toggle editmode so the pose data is always up to date bpy.ops.object.mode_set(mode='EDIT') func(ob_new, pbone_name) bpy.ops.object.mode_set(mode='OBJECT') # needed to update driver deps # context.scene.update() if __name__ == "__main__": generate_rig(bpy.context, bpy.context.object)