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# ##### 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
import bpy
from bpy.types import Operator
from bpy.props import IntProperty
from bpy.props import EnumProperty
class CopyRigidbodySettings(Operator):
'''Copy Rigid Body settings from active object to selected'''
bl_idname = "rigidbody.object_settings_copy"
bl_label = "Copy Rigid Body Settings"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
obj = context.object
return (obj and obj.rigid_body)
def execute(self, context):
obj = context.object
scn = context.scene
# deselect all but mesh objects
for o in context.selected_objects:
if o.type != 'MESH':
o.select = False
sel = context.selected_objects
if sel:
# add selected objects to active one groups and recalculate
bpy.ops.group.objects_add_active()
scn.frame_set(scn.frame_current)
# copy settings
for o in sel:
if o.rigid_body is None:
continue
o.rigid_body.type = obj.rigid_body.type
o.rigid_body.kinematic = obj.rigid_body.kinematic
o.rigid_body.mass = obj.rigid_body.mass
o.rigid_body.collision_shape = obj.rigid_body.collision_shape
o.rigid_body.use_margin = obj.rigid_body.use_margin
o.rigid_body.collision_margin = obj.rigid_body.collision_margin
o.rigid_body.friction = obj.rigid_body.friction
o.rigid_body.restitution = obj.rigid_body.restitution
o.rigid_body.use_deactivation = obj.rigid_body.use_deactivation
o.rigid_body.start_deactivated = obj.rigid_body.start_deactivated
o.rigid_body.deactivate_linear_velocity = obj.rigid_body.deactivate_linear_velocity
o.rigid_body.deactivate_angular_velocity = obj.rigid_body.deactivate_angular_velocity
o.rigid_body.linear_damping = obj.rigid_body.linear_damping
o.rigid_body.angular_damping = obj.rigid_body.angular_damping
o.rigid_body.collision_groups = obj.rigid_body.collision_groups
return {'FINISHED'}
class BakeToKeyframes(Operator):
'''Bake rigid body transformations of selected objects to keyframes'''
bl_idname = "rigidbody.bake_to_keyframes"
bl_label = "Bake To Keyframes"
bl_options = {'REGISTER', 'UNDO'}
frame_start = IntProperty(
name="Start Frame",
description="Start frame for baking",
min=0, max=300000,
default=1,
)
frame_end = IntProperty(
name="End Frame",
description="End frame for baking",
min=1, max=300000,
default=250,
)
step = IntProperty(
name="Frame Step",
description="Frame Step",
min=1, max=120,
default=1,
)
@classmethod
def poll(cls, context):
obj = context.object
return (obj and obj.rigid_body)
def execute(self, context):
bake = []
objs = []
scene = context.scene
frame_orig = scene.frame_current
frames = list(range(self.frame_start, self.frame_end + 1, self.step))
# filter objects selection
for obj in context.selected_objects:
if not obj.rigid_body or obj.rigid_body.type != 'ACTIVE':
obj.select = False
objs = context.selected_objects
if objs:
# store transformation data
for f in list(range(self.frame_start, self.frame_end + 1)):
scene.frame_set(f)
if f in frames:
mat = {}
for i, obj in enumerate(objs):
mat[i] = obj.matrix_world.copy()
bake.append(mat)
# apply transformations as keyframes
for i, f in enumerate(frames):
scene.frame_set(f)
obj_prev = objs[0]
for j, obj in enumerate(objs):
mat = bake[i][j]
obj.location = mat.to_translation()
rot_mode = obj.rotation_mode
if rot_mode == 'QUATERNION':
obj.rotation_quaternion = mat.to_quaternion()
elif rot_mode == 'AXIS_ANGLE':
# this is a little roundabout but there's no better way right now
aa = mat.to_quaternion().to_axis_angle()
obj.rotation_axis_angle = (aa[1], ) + aa[0][:]
else: # euler
# make sure euler rotation is compatible to previous frame
obj.rotation_euler = mat.to_euler(rot_mode, obj_prev.rotation_euler)
obj_prev = obj
bpy.ops.anim.keyframe_insert(type='BUILTIN_KSI_LocRot', confirm_success=False)
# remove baked objects from simulation
bpy.ops.rigidbody.objects_remove()
# clean up keyframes
for obj in objs:
action = obj.animation_data.action
for fcu in action.fcurves:
keyframe_points = fcu.keyframe_points
i = 1
# remove unneeded keyframes
while i < len(keyframe_points) - 1:
val_prev = keyframe_points[i - 1].co[1]
val_next = keyframe_points[i + 1].co[1]
val = keyframe_points[i].co[1]
if abs(val - val_prev) + abs(val - val_next) < 0.0001:
keyframe_points.remove(keyframe_points[i])
else:
i += 1
# use linear interpolation for better visual results
for keyframe in keyframe_points:
keyframe.interpolation = 'LINEAR'
# return to the frame we started on
scene.frame_set(frame_orig)
return {'FINISHED'}
def invoke(self, context, event):
scene = context.scene
self.frame_start = scene.frame_start
self.frame_end = scene.frame_end
wm = context.window_manager
return wm.invoke_props_dialog(self)
class ConnectRigidBodies(Operator):
'''Create rigid body constraint between two selected rigid bodies'''
bl_idname = "rigidbody.connect"
bl_label = "Connect Rigid Bodies"
bl_options = {'REGISTER', 'UNDO'}
con_type = EnumProperty(
name="Type",
description="Type of generated constraint",
# XXX Would be nice to get icons too, but currently not possible ;)
items=tuple((e.identifier, e.name, e.description, e. value)
for e in bpy.types.RigidBodyConstraint.bl_rna.properties["type"].enum_items),
default='FIXED',)
pivot_type = EnumProperty(
name="Location",
description="Constraint pivot location",
items=(('CENTER', "Center", "Pivot location is between the constrained rigid bodies"),
('ACTIVE', "Active", "Pivot location is at the active object position"),
('SELECTED', "Selected", "Pivot location is at the selected object position")),
default='CENTER',)
@classmethod
def poll(cls, context):
obj = context.object
objs = context.selected_objects
return (obj and obj.rigid_body and (len(objs) > 1))
def execute(self, context):
objs = context.selected_objects
obj_act = context.active_object
for obj in objs:
if obj == obj_act:
continue
if self.pivot_type == 'ACTIVE':
loc = obj_act.location
elif self.pivot_type == 'SELECTED':
loc = obj.location
else:
loc = (obj_act.location + obj.location) / 2.0
bpy.ops.object.add(type='EMPTY', view_align=False, enter_editmode=False, location=loc)
bpy.ops.rigidbody.constraint_add()
con = context.active_object.rigid_body_constraint
con.type = self.con_type
con.object1 = obj_act
con.object2 = obj
return {'FINISHED'}
def invoke(self, context, event):
wm = context.window_manager
return wm.invoke_props_dialog(self)
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