Simple addon for animating spline curves or "RotoBeziers" for

rotoscoping

animation_rotobezier.py

+# ##### 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 #####
+
+#-------------------------------------------------------------------------
+# WARNING: Currently adding new CVs to an already animated curve isn't safe
+# Thanks to Campbell Barton for hes API additions and fixes
+# Daniel Salazar - ZanQdo
+#-------------------------------------------------------------------------
+
+bl_addon_info = {
+    'name': 'RotoBezier',
+    'author': 'Daniel Salazar <zanqdo@gmail.com>',
+    'version': (0,1),
+    'blender': (2, 5, 5),
+    'api': 33198,
+    'location': 'Select a Curve > Properties > Curve > RotoBezier',
+    'description': 'Allows animation of bezier curves for rotoscoping',
+    'warning': '', 
+    'wiki_url': '',
+    'tracker_url': '',
+    'category': 'Animation'}
+
+
+import bpy
+
+#
+# GUI (Panel)
+#
+class OBJECT_PT_rotobezier(bpy.types.Panel):
+
+    bl_label = "RotoBezier"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "data"
+
+    # show this add-on only in the Camera-Data-Panel
+    @classmethod
+    def poll(self, context):
+        return context.active_object.type  == 'CURVE'
+
+    # draw the gui
+    def draw(self, context):
+        layout = self.layout
+
+        row = layout.row()
+        row.operator('curve.insert_keyframe_rotobezier')
+        row.operator('curve.delete_keyframe_rotobezier')
+
+
+class CURVE_OT_insert_keyframe_rotobezier(bpy.types.Operator):
+    bl_label = 'Insert Keyframe'
+    bl_idname = 'curve.insert_keyframe_rotobezier'
+    bl_description = 'Insert a RotoBezier Keyframe'
+    bl_options = {'REGISTER', 'UNDO'}
+
+    # on mouse up:
+    def invoke(self, context, event):
+
+        self.insert_keyframe(context)
+
+        return {'FINISHED'}
+
+
+    def insert_keyframe(op, context):
+        
+        import bpy
+
+        Obj = bpy.context.active_object
+
+        if Obj.type == 'CURVE':
+            Mode = False
+            if bpy.context.mode != 'OBJECT':
+                Mode = not Mode
+                bpy.ops.object.editmode_toggle()
+            Data = Obj.data
+            
+            for Splines in Data.splines:
+                for CVs in Splines.bezier_points:
+                    CVs.keyframe_insert('co')
+                    CVs.keyframe_insert('handle_left')
+                    CVs.keyframe_insert('handle_right')
+            
+            if Mode:
+                bpy.ops.object.editmode_toggle()
+
+
+        return {'FINISHED'} 
+
+
+class CURVE_OT_delete_keyframe_rotobezier(bpy.types.Operator):
+    bl_label = 'Delete Keyframe'
+    bl_idname = 'curve.delete_keyframe_rotobezier'
+    bl_description = 'Delete a RotoBezier Keyframe'
+
+    # on mouse up:
+    def invoke(self, context, event):
+
+        self.delete_keyframe(context)
+
+        return {'FINISHED'}
+
+
+    def delete_keyframe(op, context):
+        
+        import bpy
+
+        Obj = bpy.context.active_object
+
+        if Obj.type == 'CURVE':
+            Mode = False
+            if bpy.context.mode != 'OBJECT':
+                Mode = not Mode
+                bpy.ops.object.editmode_toggle()
+            Data = Obj.data
+            
+            for Splines in Data.splines:
+                for CVs in Splines.bezier_points:
+                    CVs.keyframe_delete('co')
+                    CVs.keyframe_delete('handle_left')
+                    CVs.keyframe_delete('handle_right')
+            
+            if Mode:
+                bpy.ops.object.editmode_toggle()
+
+
+        return {'FINISHED'} 
+
+
+
+def register():
+    pass
+    
+def unregister():
+    pass
+    
+if __name__ == "__main__":
+    register()