convert rigify into a package. advantage is new types can be added into the package without modifying any existing files, the bone 'type' property will find the matching submodule

release/scripts/modules/rigify/finger.py

@@ -0,0 +1,173 @@
+# ##### 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 rigify import get_bone_data, bone_basename, empty_layer
+from rna_prop_ui import rna_idprop_ui_get, rna_idprop_ui_prop_get
+from functools import reduce
+
+def main(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
+    
+    control_ebone.connected = orig_ebone.connected
+    control_ebone.parent = orig_ebone.parent
+    
+    # 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.rna_path = controller_path + '.scale[1]'
+
+        # 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
+