create separate class

source/move.py

@@ -2,6 +2,67 @@ import bpy
 from random import random
 from mathutils import Matrix, Quaternion
 
+
+class ArmGraspController:
+    def __init__(self, armature_name):
+        self.arm = bpy.data.objects[armature_name]
+        self.open = False
+        self.finger_grab_bones = ["index_3", "middle_3", "ring_3", "pinky_3"]
+        self.thumb_rot_bone = "thumb_3"
+
+    def deselect_all_bones(self):
+        for bone in self.arm.pose.bones:    # Deselect all selected bones
+            bone.bone.select = False
+
+    def open_fingers(self):
+        self.grab_movement(0.8)
+
+    def close_fingers(self):
+        self.grab_movement(-0.8)
+
+    def move_fingers(self):
+        if self.open:
+            self.open_fingers()
+        else:
+            self.close_fingers()
+        self.open = not self.open
+
+    def grab_movement(self, angle):
+        #  select the 4 base finger bones
+        #  Then:
+        #  To rotate around local axis (will cause to grab)
+        #  Then do the same with thumb, but only around local Z axis!
+        bpy.ops.object.mode_set(mode='OBJECT')
+        bpy.ops.object.select_all(action='DESELECT') # Deselect all objects
+        bpy.context.view_layer.objects.active = self.arm # Make the Armature the active object 
+        bpy.ops.object.mode_set(mode='POSE')
+        
+        # Deselect all fingers
+        self.deselect_all_bones()
+        
+        # Rotate fingers
+        for name in self.finger_grab_bones:
+            bone = self.arm.pose.bones.get(name)
+            # Bones need to be selected when adding keyframes, otherwise blender will throw an error:
+            # https://blender.stackexchange.com/questions/1828/what-constitutes-a-context-in-pose-mode
+            bone.bone.select = True
+            # rotate
+            bone.rotation_mode = 'XYZ'
+            bone.rotation_euler.rotate_axis('X', angle)
+        
+        # bpy.ops.transform.rotate(value=angle, orient_axis='X', orient_type='GLOBAL')
+        # Add keyframe
+        bpy.ops.anim.keying_set_active_set(type='Rotation')
+        bpy.ops.anim.keyframe_insert(type='Rotation')
+        
+        # Now rotate the thumb too
+        self.deselect_all_bones()
+        bone = self.arm.pose.bones.get(self.thumb_rot_bone).bone
+        if bone: bone.select = True
+        bpy.ops.transform.rotate(value=angle, orient_axis='Z', orient_type='LOCAL')
+        bpy.ops.anim.keyframe_insert(type='Rotation')
+
+
 ob = bpy.data.objects['Sphere']
 frame_number = 0
 
@@ -9,64 +70,10 @@ max_dist = 0.5
 #start_location = ob.location.copy()
 start_location = (1.6766993999481201, 0.3146645724773407, -1.3483989238739014)
 
-finger_grab_bones = ["index_3", "middle_3", "ring_3", "pinky_3"]
-thumb_rot_bone = "thumb_3"
-
-def grab_movement(open):
-    # Todo:
-    #  select the 4 base finger bones
-    #  Then:
-    #  To rotate around local axis (will cause to grab)
-    #  Then do the same with thumb, but only around local Z axis!
-    bpy.ops.object.mode_set(mode='OBJECT')
-    bpy.ops.object.select_all(action='DESELECT') # Deselect all objects
-    arm = bpy.data.objects['Armature']
-    bpy.context.view_layer.objects.active = arm # Make the Armature the active object 
-    bpy.ops.object.mode_set(mode='POSE')
-    
-    # Rotate all fingers
-    if open:
-        angle = -0.8
-    else:
-        angle = 0.8
-    
-    # Deselect all fingers
-    for bone in arm.pose.bones:    # Deselect all selected bones
-        bone.bone.select = False
-    
-    # Rotate fingers
-    for name in finger_grab_bones:
-        bone = arm.pose.bones.get(name)
-        # Bones need to be selected when adding keyframes, otherwise blender will throw an error:
-        # https://blender.stackexchange.com/questions/1828/what-constitutes-a-context-in-pose-mode
-        bone.bone.select = True
-        # rotate
-        axis = bone.x_axis
-        bone.rotation_quaternion = bone.rotation_quaternion @ Quaternion(axis, angle)
-        # bone.matrix = bone.matrix @ Matrix.Rotation(-angle, 4, axis)
-    
-    # Add keyframe
-    bpy.ops.anim.keying_set_active_set(type='Rotation')
-    bpy.ops.anim.keyframe_insert(type='Rotation')
-    
-    # Now rotate the thumb too
-    for bone in arm.pose.bones:    # Deselect all selected bones
-        bone.bone.select = False
-        
-    bone = arm.pose.bones.get(thumb_rot_bone).bone
-    if bone: bone.select = True
-    bpy.ops.transform.rotate(value=angle, orient_axis='Z', orient_type='LOCAL')
-    bpy.ops.anim.keyframe_insert(type='Rotation')
-
 # Script start
-open = False
-#if len(bpy.data.scenes['Scene'].keying_sets) == 0:
-#    # Add new keying set
-#    bpy.ops.anim.keying_set_add()
-#    # Activate keying set
-#    bpy.ops.anim.keying_set_active_set()
+controller = ArmGraspController("Armature")
 
-for i in range(50):
+for i in range(12):
     x = random()*max_dist
     y = random()*max_dist
     z = random()*max_dist
@@ -78,6 +85,5 @@ for i in range(50):
         start_location[2] + z
     )
     ob.keyframe_insert(data_path='location', index=-1)
-    grab_movement(open)
-    open = not open
+    controller.move_fingers()
     frame_number += 20