blender/release/scripts/startup/bl_operators/rigidbody.py
Joshua Leung 4c89a658be Fix T38157: Rigid body, crazy f-curves after bake to keyframes
A logic error meant that the wrong "previous rotation" values were being used
when decomposing the rigidbody results back to transform channels. Instead of
using the previous values for the object in question, it was actually using
the rotation value of the previous object that was evaluated.
2014-01-18 01:38:40 +13:00

298 lines
10 KiB
Python

# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
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# ##### 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'}
_attrs = (
"type",
"kinematic",
"mass",
"collision_shape",
"use_margin",
"collision_margin",
"friction",
"restitution",
"use_deactivation",
"use_start_deactivated",
"deactivate_linear_velocity",
"deactivate_angular_velocity",
"linear_damping",
"angular_damping",
"collision_groups",
)
@classmethod
def poll(cls, context):
obj = context.object
return (obj and obj.rigid_body)
def execute(self, context):
obj_act = context.object
scene = context.scene
# deselect all but mesh objects
for o in context.selected_objects:
if o.type != 'MESH':
o.select = False
objects = context.selected_objects
if objects:
# add selected objects to active one groups and recalculate
bpy.ops.group.objects_add_active()
scene.frame_set(scene.frame_current)
rb_from = obj_act.rigid_body
# copy settings
for o in objects:
rb_to = o.rigid_body
if (o == obj_act) or (rb_to is None):
continue
for attr in self._attrs:
setattr(rb_to, attr, getattr(rb_from, attr))
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 = []
objects = []
scene = context.scene
frame_orig = scene.frame_current
frames_step = range(self.frame_start, self.frame_end + 1, self.step)
frames_full = range(self.frame_start, self.frame_end + 1)
# filter objects selection
for obj in context.selected_objects:
if not obj.rigid_body or obj.rigid_body.type != 'ACTIVE':
obj.select = False
objects = context.selected_objects
if objects:
# store transformation data
# need to start at scene start frame so simulation is run from the beginning
for f in frames_full:
scene.frame_set(f)
if f in frames_step:
mat = {}
for i, obj in enumerate(objects):
mat[i] = obj.matrix_world.copy()
bake.append(mat)
# apply transformations as keyframes
for i, f in enumerate(frames_step):
scene.frame_set(f)
for j, obj in enumerate(objects):
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
# NOTE: assume that on first frame, the starting rotation is appropriate
obj.rotation_euler = mat.to_euler(rot_mode, obj.rotation_euler)
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 objects:
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 constraints between 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',
)
connection_pattern = EnumProperty(
name="Connection Pattern",
description="Pattern used to connect objects",
items=(('SELECTED_TO_ACTIVE', "Selected to Active", "Connect selected objects to the active object"),
('CHAIN_DISTANCE', "Chain by Distance", "Connect objects as a chain based on distance, starting at the active object")),
default='SELECTED_TO_ACTIVE',
)
@classmethod
def poll(cls, context):
obj = context.object
return (obj and obj.rigid_body)
def _add_constraint(self, context, object1, object2):
if object1 == object2:
return
if self.pivot_type == 'ACTIVE':
loc = object1.location
elif self.pivot_type == 'SELECTED':
loc = object2.location
else:
loc = (object1.location + object2.location) / 2.0
ob = bpy.data.objects.new("Constraint", object_data=None)
ob.location = loc
context.scene.objects.link(ob)
context.scene.objects.active = ob
ob.select = True
bpy.ops.rigidbody.constraint_add()
con_obj = context.active_object
con_obj.empty_draw_type = 'ARROWS'
con = con_obj.rigid_body_constraint
con.type = self.con_type
con.object1 = object1
con.object2 = object2
def execute(self, context):
scene = context.scene
objects = context.selected_objects
obj_act = context.active_object
change = False
if self.connection_pattern == 'CHAIN_DISTANCE':
objs_sorted = [obj_act]
objects_tmp = context.selected_objects
try:
objects_tmp.remove(obj_act)
except ValueError:
pass
last_obj = obj_act
while objects_tmp:
objects_tmp.sort(key=lambda o: (last_obj.location - o.location).length)
last_obj = objects_tmp.pop(0)
objs_sorted.append(last_obj)
for i in range(1, len(objs_sorted)):
self._add_constraint(context, objs_sorted[i - 1], objs_sorted[i])
change = True
else: # SELECTED_TO_ACTIVE
for obj in objects:
self._add_constraint(context, obj_act, obj)
change = True
if change:
# restore selection
bpy.ops.object.select_all(action='DESELECT')
for obj in objects:
obj.select = True
scene.objects.active = obj_act
return {'FINISHED'}
else:
self.report({'WARNING'}, "No other objects selected")
return {'CANCELLED'}