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2023/scripts/animation_tools/IKFK_SWITCH_README.md

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+# IKFK Switch Tool
+
+## 概述
+IKFK Switch Tool 是一个用于在Maya中实现IK和FK动画之间无缝切换的工具。该工具从原始MEL脚本转换为Python版本，提供更好的跨版本兼容性。
+
+## 版本信息
+- **版本**: V1.0
+- **兼容性**: Maya 2018+
+- **语言**: Python
+- **原始版本**: MEL (ikfk_switch.mel)
+
+## 功能特性
+
+### 主要功能
+1. **无缝切换**: 在IK和FK动画之间进行无缝切换，保持动画连续性
+2. **自动匹配**: 切换时自动匹配控制器位置和旋转
+3. **关键帧设置**: 自动在切换点设置关键帧
+4. **预设支持**: 内置ADV绑定预设，支持快速设置
+
+### UI功能
+- **FK控制器加载**: 加载FK骨骼和控制器
+  - FK Joint Root/Mid/End
+  - FK Ctrl Root/Mid/End
+  
+- **IK控制器加载**: 加载IK骨骼和控制器
+  - IK Joint Root/Mid/End
+  - IK Ctrl Root (IK手柄)
+  - IK Ctrl Pole (极向量控制器)
+  
+- **切换控制器**: 设置切换属性
+  - Switch Ctrl (切换控制器)
+  - Switch Attr (切换属性名称)
+
+### 辅助功能
+- **ADV Build**: 快速为ADV绑定设置IKFK切换
+- **Empty**: 清空所有输入字段
+- **BiliBili**: 打开教程链接
+
+## 使用方法
+
+### 基本使用流程
+
+1. **加载FK控制器**
+   - 选择FK骨骼根节点，点击"< FK Joint Root"
+   - 选择FK骨骼中间节点，点击"< FK Joint Mid"
+   - 选择FK骨骼末端节点，点击"< FK Joint End"
+   - 重复以上步骤加载FK控制器
+
+2. **加载IK控制器**
+   - 选择IK骨骼节点，点击相应按钮
+   - 选择IK控制器和极向量控制器
+
+3. **设置切换控制器**
+   - 选择用于切换的控制器，点击"< Switch Ctrl"
+   - 在通道盒中选择切换属性，点击"< Switch Attr"
+
+4. **构建切换系统**
+   - 点击"<<< Build Seamless Switching >>>"按钮
+   - 系统会自动创建必要的属性和脚本节点
+
+5. **使用切换功能**
+   - 在切换控制器上找到"IKFK_Seamless"属性
+   - 切换该属性值（IK=0, FK=1）即可实现无缝切换
+
+### ADV绑定快速设置
+
+如果使用ADV绑定系统，可以使用预设功能：
+1. 展开"Edit"面板
+2. 点击"<<< ADV Build >>>"
+3. 系统会自动为左右手臂和腿部设置IKFK切换
+
+## 技术实现
+
+### 核心组件
+
+1. **IKFKSwitchUI类**: UI界面管理
+   - 创建和管理UI窗口
+   - 处理用户输入
+   - 调用切换逻辑
+
+2. **seamless_switching函数**: 核心切换逻辑
+   - 创建数据存储locator
+   - 添加必要属性
+   - 建立属性连接
+   - 创建脚本节点
+
+3. **create_switching_script函数**: 创建全局切换脚本
+   - 使用MEL脚本实现切换逻辑
+   - 处理约束和关键帧
+
+4. **create_script_job函数**: 创建脚本任务
+   - 监听属性变化
+   - 自动触发切换
+
+### 兼容性设计
+
+- 使用`maya.cmds`和`maya.mel`模块，确保跨版本兼容
+- 避免使用版本特定的API
+- 使用f-string格式化（Python 3.6+）
+- 异常处理确保稳定性
+
+## 工具架集成
+
+该工具已集成到Nexus Animation工具架：
+- **图标**: ikfk_switch.png
+- **位置**: 动画工具架末尾
+- **调用**: `import animation_tools.ikfx_switch; animation_tools.ikfx_switch.show()`
+
+## 文件位置
+
+### Maya 2023
+- 脚本: `scripts/animation_tools/ikfx_switch.py`
+- 图标: `icons/ikfk_switch.png`
+- 工具架: `shelves/shelf_Nexus_Animation.mel`
+
+### Maya 2025
+- 脚本: `scripts/animation_tools/ikfx_switch.py`
+- 图标: `icons/ikfk_switch.png`
+- 工具架: `shelves/shelf_Nexus_Animation.mel`
+
+## 注意事项
+
+1. **属性要求**: 切换属性必须有最小值和最大值设置
+2. **命名规范**: 建议使用清晰的命名规范以便识别
+3. **关键帧**: 切换会在当前帧和前一帧设置关键帧
+4. **选择保持**: 切换后会恢复原始选择
+
+## 故障排除
+
+### 常见问题
+
+1. **切换不工作**
+   - 检查所有必需的对象是否存在
+   - 确认切换属性已正确设置
+   - 查看脚本编辑器的错误信息
+
+2. **位置不匹配**
+   - 确保FK和IK骨骼层级正确
+   - 检查约束设置
+   - 验证控制器方向
+
+3. **属性加载失败**
+   - 确保在通道盒中选择了属性
+   - 检查属性是否可关键帧化

2023/scripts/animation_tools/advIkFkSwitch.py

@@ -1,301 +0,0 @@
-from maya import cmds
-from maya.api import OpenMaya as om2
-#import logging
-'''
-Create in ADV 6.040, select the corresponding IKFK controller, and simply run the script to switch
-by kangddan
-'''
-#logger = logging.getLogger(__name__)  
-
-def setAttrs(nodes, attrs, value):
-
-    for n in nodes:
-        for ids, i in enumerate(attrs):
-            try:
-                if isinstance(value[ids], (list, tuple)):
-                    cmds.setAttr('{}.{}'.format(n, i), *value[ids])
-                else:
-                    cmds.setAttr('{}.{}'.format(n, i), value[ids])
-            except:
-                pass
-    
-class Path:
-    @classmethod
-    def path(cls, fullPathName):
-        return fullPathName.split("|")[-1]
-        
-    @classmethod
-    def name(cls, fullPathName):
-        return cls.path(fullPathName).split(':')[-1]
-        
-    @classmethod    
-    def namespace(cls, fullPathName):
-        return cls.path(fullPathName).rpartition(':')[0]
-        
-class MOpenMaya:
-    
-    @staticmethod
-    def toMObject(nodeName):
-        sl = om2.MSelectionList(); sl.add(nodeName)
-        return sl.getDependNode(0)
-    
-    @classmethod
-    def getDagNode(cls, mobj) :
-        if not mobj.hasFn(om2.MFn.kDagNode): return
-        return om2.MDagPath.getAPathTo(mobj)
-    
-    @classmethod
-    def getGlobatMatrix(cls, dagNode):
-        if not isinstance(dagNode, om2.MDagPath): return
-        return dagNode.inclusiveMatrix()
-    
-    
-    @classmethod
-    def getGlobalPos(cls, dagNode):
-        if not dagNode: return    
-        tm = om2.MTransformationMatrix(cls.getGlobatMatrix(dagNode))
-        return  tm.translation(om2.MSpace.kTransform)
-        
-    @classmethod 
-    def ls(cls):
-        sl = om2.MGlobal.getActiveSelectionList()
-        return [cls.getDagNode(sl.getDependNode(o)) for o in range(sl.length())]
-
-
-class IkFk:
-    ARM_IK_CTRLS       = {'ik1':'IKArm', 'ik2':'PoleArm'}                                   # 0
-    ARM_FK_CTRLS       = {'fk1':'FKShoulder', 'fk2':'FKElbow', 'fk3':'FKWrist'}             # 1  
-    ARM_FKTOIK_LOCS    = {'loc1':'IKX2Shoulder', 'loc2':'IKX2Elbow', 'loc3':'IKX2Wrist'}    # 2 
-    ARM_IKTOFK_LOCS    = {'loc1':'AlignIKToWrist'}                                          # 3            
-    ARM_IKFK           = {'switch':'FKIKArm'}                                                
-    
-    LEG_IK_CTRLS       = {'ik1':'IKLeg', 'ik2':'PoleLeg', 'ik3':'RollHeel', 'ik4':'RollToesEnd', 'ik5':'RollToes', 'ik6':'IKToes'}
-    LEG_FK_CTRLS       = {'fk1':'FKHip', 'fk2':'FKKnee', 'fk3':'FKAnkle', 'fk4':'FKToes'}
-    LEG_FKTOIK_LOCS    = {'loc1':'IKX2Hip', 'loc2':'IKX2Knee', 'loc3':'IKX2Ankle', 'loc4':'IKX2Toes', 'loc5':'IKX2ToesEnd'}
-    LEG_IKTOFK_LOCS    = {'loc1':'AlignIKToAnkle', 'loc2':'AlignIKToToes'}
-    leg_IKFK           = {'switch':'FKIKLeg'}
-    
-    # --------------------------------------------------------------
-    ARM_BASE_JNTS      = {'base1':'Shoulder', 'base2':'Elbow', 'base3':'Wrist', 'root':'RootSystem'} 
-    LEG_BASE_JNTS      = {'base1':'Hip', 'base2':'Knee', 'base3':'Ankle', 'root':'RootSystem'}
-
-    
-    # --------------------------------------------------------------
-        
-    @staticmethod
-    def getLRDict(_dict, namespace=''):
-        
-        ldictList    = [{k:'{}{}_L'.format(namespace, v) for k, v in d.items()} for d in _dict[:-2]]
-        rdictList    = [{k:'{}{}_R'.format(namespace, v) for k, v in d.items()} for d in _dict[:-2]]
-        basedictList = [{k:'{}{}'.format(namespace, v) for k, v in d.items()} for d in _dict[-2:]]
-
-        return ldictList, rdictList, basedictList
-        
-    @staticmethod    
-    def getLongName(sName, _dict):
-        for k, v in _dict.items():
-            longNames = cmds.ls(v, long=True)
-            for ln in longNames:
-                if sName == ln[0:len(sName)]:
-                    _dict[k] = ln
-                # if ln[0].startswith(sName):
-                #     _dict[k] = ln
-                    break
-                    
-    # -------------------------------------------------------------- 
-             
-    def newDict(self, fullPathName):
-        dictList = [IkFk.ARM_IK_CTRLS, IkFk.ARM_FK_CTRLS, IkFk.ARM_FKTOIK_LOCS, IkFk.ARM_IKTOFK_LOCS, IkFk.ARM_IKFK,
-                    IkFk.LEG_IK_CTRLS, IkFk.LEG_FK_CTRLS, IkFk.LEG_FKTOIK_LOCS, IkFk.LEG_IKTOFK_LOCS, IkFk.leg_IKFK,
-                    IkFk.ARM_BASE_JNTS, IkFk.LEG_BASE_JNTS]
-                    
-        namespace = Path.namespace(fullPathName)
-        if namespace:
-            self.isRef = True
-            return self.getLRDict(dictList, namespace+':')
-        else:
-            self.isRef = False
-            sName = '|' + cmds.ls('*{}'.format(fullPathName), long=True)[0].split('|')[1]
-            ldictList, rdictList, basedictList = self.getLRDict(dictList)
-            
-            for dL, dR in zip(ldictList, rdictList):    
-                self.getLongName(sName, dL)
-                self.getLongName(sName, dR)
-                
-            for bS in basedictList: self.getLongName(sName, bS) # 
-
-            return ldictList, rdictList, basedictList
-            
-    @staticmethod
-    def setPolePose(jntList, pole):
-        jntPos = [MOpenMaya.getGlobalPos(MOpenMaya.getDagNode(MOpenMaya.toMObject(j))) for j in jntList]
-        off = ((jntPos[1] - jntPos[0]).length() + (jntPos[2] - jntPos[1]).length())
-        
-        midPos = ((jntPos[1] - jntPos[0]).normal() + ((jntPos[2] - jntPos[1]).normal() * -1)) * 0.5
-        polePos = (midPos.normal() * off) + jntPos[1]
-        cmds.xform(pole, t=polePos, ws=True)
-        
-    @staticmethod    
-    def setIkStretch(jntList, locList):
-        jntPos = [MOpenMaya.getGlobalPos(MOpenMaya.getDagNode(MOpenMaya.toMObject(j))) for j in jntList]
-        locPos = [MOpenMaya.getGlobalPos(MOpenMaya.getDagNode(MOpenMaya.toMObject(l))) for l in locList]
-        
-        upper = (jntPos[1] - jntPos[0]).length()
-        mid = (jntPos[2] - jntPos[1]).length()
-        
-        locUpper = (locPos[1] - locPos[0]).length()
-        locMid = (locPos[2] - locPos[1]).length()
-        
-        upperError = abs(upper / locUpper)
-        midErrorr = abs(mid / locMid)
-        return upperError, midErrorr
-        
-    def getNewDict(self, fullPathName):
-        ldictList, rdictList, basedictList = self.newDict(fullPathName)
-        ALD = ldictList[0:5]; LLD = ldictList[5:]
-        ARD = rdictList[0:5]; LRD = rdictList[5:]
-        
-        AB  = basedictList[0]; LB =  basedictList[1] # base joint ref
-
-        return ALD, ARD, LLD, LRD, AB, LB
-        
-    @staticmethod
-    def _updateDict(_dict):
-        return [value for d in [_dict[0], _dict[1], _dict[-1]] for value in d.values()]
-            
-    def __init__(self, autoK=True):
-        self.curTime , self.prevTime  = cmds.currentTime(q=True), cmds.currentTime(q=True)-1
-        self.autoK = autoK
-        self.isRef = False
-        self.ikfkSwitch()
-    
-    
-    def autoKey(self, nodes=[], num=None):
-        if not self.autoK:
-            return
-        for i in nodes:
-            try:
-                if cmds.keyframe(i, q=True, kc=True):
-                    cmds.setKeyframe(i, i=True, t=num)
-                else:
-                    cmds.setKeyframe(i, i=False, t=num)
-            except:
-                continue
-                        
-    def ikfkSwitch(self):
-        
-        sl = MOpenMaya.ls()
-        for i in sl:
-            if i is None:
-                om2.MGlobal.displayWarning('Please select a DAG node')
-                continue
-                        
-            ALD, ARD, LLD, LRD, AB, LB = self.getNewDict(i.fullPathName()) 
-            path = Path.path(i.fullPathName()) if self.isRef else i.fullPathName()    
-            
-            if path in self._updateDict(ALD):   # L arm
-                self.armIKFk(ALD, AB)
-            
-            elif path in self._updateDict(ARD): # R arm
-                self.armIKFk(ARD, AB)
-                
-            elif path in self._updateDict(LLD): # L leg
-                self.legIkFk(LLD, LB)
-                
-            elif path in self._updateDict(LRD): # R leg
-                self.legIkFk(LRD, LB)           
-           
-                
-    def armIKFk(self, _dict, armBase):
-        switch                      = _dict[-1]['switch']
-        ikCtrl, poleCtrl            = _dict[0]['ik1'], _dict[0]['ik2']
-        fkCtrl1, fkCtrl2, fkCtrl3   = _dict[1]['fk1'], _dict[1]['fk2'], _dict[1]['fk3']
-        fti1, fti2, fti3            = _dict[2]['loc1'], _dict[2]['loc2'], _dict[2]['loc3']
-        itf                         = _dict[3]['loc1']
-        baseJ1, baseJ2, baseJ3, root      = armBase['base1'], armBase['base2'], armBase['base3'], armBase['root']
-        
-        # -------------------------------------------
-        scaleValue = cmds.getAttr('{}.sx'.format(root))
-        # -------------------------------------------
-        
-        value = cmds.getAttr(switch + '.FKIKBlend')
-        
-        self.autoKey([switch, ikCtrl, poleCtrl, fkCtrl1, fkCtrl2, fkCtrl3], self.prevTime)   
-            
-        # fk to ik
-        if value == 0.0:
-            upperV, midV = self.setIkStretch([fkCtrl1, fkCtrl2, fkCtrl3], [baseJ1, baseJ2, baseJ3])
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'Lenght1'), upperV / scaleValue)
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'Lenght2'), midV/ scaleValue)
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'stretchy'), 0)
-            cmds.setAttr('{}.{}'.format(poleCtrl, 'lock'), 0)
-            
-            cmds.matchTransform(ikCtrl, itf)
-            self.setPolePose([fkCtrl1, fkCtrl2, fkCtrl3], poleCtrl)
-            cmds.setAttr(switch + '.FKIKBlend', 10.0)
-        
-        # ik to fk    
-        elif value == 10.0:
-            for fk, loc in zip([fkCtrl1, fkCtrl2, fkCtrl3], [fti1, fti2, fti3]):
-                cmds.matchTransform(fk, loc)
-                
-            cmds.setAttr(switch + '.FKIKBlend', 0.0)
-            
-        self.autoKey([switch, ikCtrl, poleCtrl, fkCtrl1, fkCtrl2, fkCtrl3], self.curTime) 
-        
-    def legIkFk(self, _dict, legBase):
-        switch                                   = _dict[-1]['switch']
-        ikCtrl, poleCtrl, ik3, ik4, ik5, ik6     = _dict[0]['ik1'], _dict[0]['ik2'], _dict[0]['ik3'], _dict[0]['ik4'], _dict[0]['ik5'], _dict[0]['ik6']
-        fkCtrl1, fkCtrl2, fkCtrl3, fkCtrl4       = _dict[1]['fk1'], _dict[1]['fk2'], _dict[1]['fk3'], _dict[1]['fk4']
-        fti1, fti2, fti3, fti4, fti5             = _dict[2]['loc1'], _dict[2]['loc2'], _dict[2]['loc3'], _dict[2]['loc4'], _dict[2]['loc5']
-        itf1, itf2                               = _dict[3]['loc1'], _dict[3]['loc2']
-        baseJ1, baseJ2, baseJ3, root             = legBase['base1'], legBase['base2'], legBase['base3'], legBase['root']
-        
-        # -------------------------------------------
-        scaleValue = cmds.getAttr('{}.sx'.format(root))
-        # -------------------------------------------
-        
-        value = cmds.getAttr(switch + '.FKIKBlend')
-        
-        self.autoKey([switch, ikCtrl, poleCtrl, ik3, ik4, ik5, ik6, fkCtrl1, fkCtrl2, fkCtrl3, fkCtrl4], self.prevTime)   
-        
-        # fk to ik
-        if value == 0.0:
-            upperV, midV = self.setIkStretch([fkCtrl1, fkCtrl2, fkCtrl3], [baseJ1, baseJ2, baseJ3])
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'Lenght1'), upperV / scaleValue)
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'Lenght2'), midV / scaleValue)
-            cmds.setAttr('{}.{}'.format(ikCtrl, 'stretchy'), 0)
-            cmds.setAttr('{}.{}'.format(poleCtrl, 'lock'), 0)
-                     
-            setAttrs([ikCtrl], ['swivel', 'roll', 'rock', 'antiPop'], [0, 0, 0, 0])
-            setAttrs([ik3, ik4, ik5], ['t', 'r', 's'], [[0, 0, 0], [0, 0, 0], [1, 1, 1]])  
-            
-            cmds.matchTransform(ikCtrl, itf1) 
-            cmds.matchTransform(ik6, itf2)  #
-            self.setPolePose([fkCtrl1, fkCtrl2, fkCtrl3], poleCtrl)
-            cmds.setAttr(switch + '.FKIKBlend', 10.0)
-        
-        # ik to fk    
-        elif value == 10.0:
-            for fk, loc in zip([fkCtrl1, fkCtrl2, fkCtrl3, fkCtrl4], [fti1, fti2, fti3, fti4]):
-                cmds.matchTransform(fk, loc)
-                
-            cmds.setAttr(switch + '.FKIKBlend', 0.0)
-        
-        self.autoKey([switch, ikCtrl, poleCtrl, ik3, ik4, ik5, ik6, fkCtrl1, fkCtrl2, fkCtrl3, fkCtrl4], self.curTime) 
-        
-    
-if __name__ == '__main__':        
-    IkFk(False)
-    
-'''
-
-Revision History 
-Revision 1: 2023-08-11 : First publish
-Revision 2: 2023-08-14 : Fix a series of errors in the IK controller
-Revision 3: 2023-08-18 : Code Redundancy Optimization
-Revision 4: 2023-08-19 : Adding auto keyframe 
-Revision 5: 2023-08-22 : Update IK Pole Position Algorithm
-Revision 6: 2023-09-15 : Optimize the transition from FK to IK
-
-'''

2023/scripts/animation_tools/ikfk_switch.py

@@ -0,0 +1,603 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import maya.cmds as cmds
+import maya.mel as mel
+import math
+import sys
+import inspect
+import importlib 
+
+# Crucial for fixing namespace issues:
+# Dynamically gets the module name (e.g., 'animation_tools.ikfk_switch') 
+
+MODULE_NAME = __name__
+
+# ==============================================================================
+# UI Creation
+# ==============================================================================
+
+def IKFK_Switch_UI():
+    """
+    Creates the main IK/FK switch Maya window interface.
+    """
+    WINDOW_NAME = "IKFK_Switch_UI"
+    WINDOW_TITLE = "IK/FK Switch V2.9 (Final Button Fix)"
+    WINDOW_WIDTH = 300
+    
+    # Check if window exists and delete it
+    if cmds.window(WINDOW_NAME, exists=True):
+        cmds.deleteUI(WINDOW_NAME, window=True)
+    
+    # Create window
+    cmds.window(WINDOW_NAME, width=WINDOW_WIDTH, title=WINDOW_TITLE)
+    
+    # Main Layout
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=1)
+    
+    # --- Helper function for button commands ---
+    # CORE FIX: Removed the 'python("...")' wrapper. 
+    # The function now returns a pure Python command string for button execution.
+    def py_cmd(func_name, args=""):
+        # Format: 'import module; module.function("args")' (Pure Python string)
+        if args:
+            # Use double quotes to avoid escaping issues
+            return 'import {0}; {0}.{1}("{2}")'.format(MODULE_NAME, func_name, args)
+        else:
+            return 'import {0}; {0}.{1}()'.format(MODULE_NAME, func_name)
+
+    # --- Edit Section ---
+    cmds.frameLayout(label="Edit", collapse=True, collapsable=True, 
+                     collapseCommand="cmds.window('{}', edit=True, height=578)".format(WINDOW_NAME),
+                     expandCommand="cmds.window('{}', edit=True, height=578)".format(WINDOW_NAME))
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    cmds.button(label="<<< ADV Build >>>", command=py_cmd("sg_ADV_Build"))
+    cmds.button(label="<<< Empty >>>", command=py_cmd("sg_Empty"))
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load FK Ctrl Section ---
+    cmds.frameLayout(label="Load FK Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # FK Joint Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_01", text="", placeholderText="FK Joint Root")
+    cmds.button(label="< FK Joint Root", command=py_cmd("sg_setTextField", "target_01"))
+    cmds.setParent("..")
+    
+    # FK Joint Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_02", text="", placeholderText="FK Joint Mid")
+    cmds.button(label="< FK Joint Mid", command=py_cmd("sg_setTextField", "target_02"))
+    cmds.setParent("..")
+    
+    # FK Joint End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_03", text="", placeholderText="FK Joint End")
+    cmds.button(label="< FK Joint End", command=py_cmd("sg_setTextField", "target_03"))
+    cmds.setParent("..")
+    
+    cmds.separator(style="in", height=5)
+    
+    # FK Ctrl Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_04", text="", placeholderText="FK Ctrl Root")
+    cmds.button(label="< FK Ctrl Root", command=py_cmd("sg_setTextField", "target_04"))
+    cmds.setParent("..")
+    
+    # FK Ctrl Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_05", text="", placeholderText="FK Ctrl Mid")
+    cmds.button(label="< FK Ctrl Mid", command=py_cmd("sg_setTextField", "target_05"))
+    cmds.setParent("..")
+    
+    # FK Ctrl End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_06", text="", placeholderText="FK Ctrl End")
+    cmds.button(label="< FK Ctrl End", command=py_cmd("sg_setTextField", "target_06"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load IK Ctrl Section ---
+    cmds.frameLayout(label="Load IK Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # IK Joint Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_07", text="", placeholderText="IK Joint Root")
+    cmds.button(label="< IK Joint Root", command=py_cmd("sg_setTextField", "target_07"))
+    cmds.setParent("..")
+    
+    # IK Joint Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_08", text="", placeholderText="IK Joint Mid")
+    cmds.button(label="< IK Joint Mid", command=py_cmd("sg_setTextField", "target_08"))
+    cmds.setParent("..")
+    
+    # IK Joint End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_09", text="", placeholderText="IK Joint End")
+    cmds.button(label="< IK Joint End", command=py_cmd("sg_setTextField", "target_09"))
+    cmds.setParent("..")
+    
+    cmds.separator(style="in", height=5)
+    
+    # IK Ctrl Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_10", text="", placeholderText="IK Ctrl Root")
+    cmds.button(label="< IK Ctrl Root", command=py_cmd("sg_setTextField", "target_10"))
+    cmds.setParent("..")
+    
+    # IK Ctrl Pole
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_11", text="", placeholderText="IK Ctrl Pole")
+    cmds.button(label="< IK Ctrl Pole", command=py_cmd("sg_setTextField", "target_11"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load Switch Ctrl Section ---
+    cmds.frameLayout(label="Load Switch Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # Switch Ctrl
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_12", text="", placeholderText="Switch Ctrl")
+    cmds.button(label="< Switch Ctrl", command=py_cmd("sg_setTextField", "target_12"))
+    cmds.setParent("..")
+    
+    # Switch Attr
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_13", text="", placeholderText="Switch Attr Name")
+    cmds.button(label="< Switch Attr", command=py_cmd("sg_setLoadAttr"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    cmds.separator(style="in", height=5)
+    
+    # Build Button
+    cmds.button(height=32, label="<<< Build Seamless Switching >>>", command=py_cmd("sg_Execute"))
+    
+    cmds.setParent("..") 
+    
+    # Adjust window height and show
+    cmds.window(WINDOW_NAME, edit=True, height=578)
+    cmds.showWindow(WINDOW_NAME)
+
+
+def sg_setTextField(target):
+    """
+    Sets the name of the currently selected object into the specified text field.
+    """
+    selection = cmds.ls(selection=True, long=False)
+    
+    if selection:
+        selected_object = selection[0]
+        cmds.textField(target, edit=True, text=selected_object)
+    else:
+        cmds.warning("Please select an object.")
+
+
+def sg_setLoadAttr():
+    """
+    Sets the name of the selected attribute in the Channel Box into the target_13 text field.
+    """
+    # Query selected attributes in the Channel Box
+    attrs = cmds.channelBox("mainChannelBox", query=True, selectedMainAttributes=True)
+    
+    if not attrs:
+        cmds.error("Select an attribute in the Channel Box...")
+        return
+        
+    # Take only the first selected attribute
+    attribute_name = attrs[0]
+    cmds.textField("target_13", edit=True, text=attribute_name)
+
+
+def sg_Execute():
+    """
+    Reads all values from UI controls and calls the sg_SeamlessSwitching function.
+    """
+    # Get values from UI controls
+    FK_Joint_Root = cmds.textField("target_01", query=True, text=True)
+    FK_Joint_Mid = cmds.textField("target_02", query=True, text=True)
+    FK_Joint_End = cmds.textField("target_03", query=True, text=True)
+    FK_Ctrl_Root = cmds.textField("target_04", query=True, text=True)
+    FK_Ctrl_Mid = cmds.textField("target_05", query=True, text=True)
+    FK_Ctrl_End = cmds.textField("target_06", query=True, text=True)
+    IK_Joint_Root = cmds.textField("target_07", query=True, text=True)
+    IK_Joint_Mid = cmds.textField("target_08", query=True, text=True)
+    IK_Joint_End = cmds.textField("target_09", query=True, text=True)
+    IK_Ctrl_Root = cmds.textField("target_10", query=True, text=True)
+    IK_Ctrl_Pole = cmds.textField("target_11", query=True, text=True)
+    Switch_Ctrl = cmds.textField("target_12", query=True, text=True)
+    Switch_Attr = cmds.textField("target_13", query=True, text=True)
+    
+    # Check for empty values
+    all_targets = [FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, FK_Ctrl_Root, FK_Ctrl_Mid, 
+                   FK_Ctrl_End, IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, IK_Ctrl_Root, 
+                   IK_Ctrl_Pole, Switch_Ctrl, Switch_Attr]
+    
+    for target in all_targets:
+        if not target:
+            cmds.error("All fields must be filled before building the switch.")
+            return
+
+    # Call core build function
+    sg_SeamlessSwitching(
+        FK_Joint_Root,
+        FK_Joint_Mid,
+        FK_Joint_End,
+        FK_Ctrl_Root,
+        FK_Ctrl_Mid,
+        FK_Ctrl_End,
+        IK_Joint_Root,
+        IK_Joint_Mid,
+        IK_Joint_End,
+        IK_Ctrl_Root,
+        IK_Ctrl_Pole,
+        Switch_Ctrl,
+        Switch_Attr
+    )
+
+
+def sg_ADV_Build():
+    """
+    Builds IK/FK switching for sample limbs using preset naming conventions.
+    NOTE: Modify names here to match your Rig naming convention.
+    """
+    
+    # Right Arm 
+    sg_SeamlessSwitching(
+        "FKXShoulder_R", "FKXElbow_R", "FKXWrist_R",
+        "FKShoulder_R", "FKElbow_R", "FKWrist_R",
+        "IKXShoulder_R", "IKXElbow_R", "IKXWrist_R",
+        "IKArm_R", "PoleArm_R", "FKIKArm_R", "fkik"
+    )
+    
+    # Left Arm
+    sg_SeamlessSwitching(
+        "FKXShoulder_L", "FKXElbow_L", "FKXWrist_L",
+        "FKShoulder_L", "FKElbow_L", "FKWrist_L",
+        "IKXShoulder_L", "IKXElbow_L", "IKXWrist_L",
+        "IKArm_L", "PoleArm_L", "FKIKArm_L", "fkik"
+    )
+    
+    # Right Leg
+    sg_SeamlessSwitching(
+        "FKXHip_R", "FKXKnee_R", "FKXAnkle_R",
+        "FKHip_R", "FKKnee_R", "FKAnkle_R",
+        "IKXHip_R", "IKXKnee_R", "IKXAnkle_R",
+        "IKLeg_R", "PoleLeg_R", "FKIKLeg_R", "fkik"
+    )
+    
+    # Left Leg
+    sg_SeamlessSwitching(
+        "FKXHip_L", "FKXKnee_L", "FKXAnkle_L",
+        "FKHip_L", "FKKnee_L", "FKAnkle_L",
+        "IKXHip_L", "IKXKnee_L", "IKXAnkle_L",
+        "IKLeg_L", "PoleLeg_L", "FKIKLeg_L", "fkik"
+    )
+
+def sg_Empty():
+    """
+    Clears all text fields in the UI.
+    """
+    for i in range(1, 14):
+        target_name = "target_{:02d}".format(i)
+        if cmds.textField(target_name, exists=True):
+            cmds.textField(target_name, edit=True, text="")
+
+
+# ==============================================================================
+# Core IK/FK Switching Logic
+# ==============================================================================
+
+def sg_switching(locator_name):
+    """
+    Executes the core IK/FK switching logic (seamless match).
+    This function is called at runtime by the scriptJob.
+    
+    Args:
+        locator_name (str): The name of the Locator storing connection info.
+    """
+    
+    # Get the Switch Control and attribute name (stored as string attributes)
+    try:
+        switch_ctrl = cmds.getAttr("{}.Switch_Ctrl".format(locator_name))
+        switch_attr_name = cmds.getAttr("{}.Switch_Attr".format(locator_name))
+    except:
+        cmds.error("Locator {} does not have required attributes.".format(locator_name))
+        return
+    
+    # State check: Use optionVar to store the last state, preventing redundant execution
+    option_var_name = locator_name  
+    current_state = cmds.getAttr("{}.IKFK_Seamless".format(switch_ctrl))
+    
+    try:
+        last_state = cmds.optionVar(query=option_var_name)
+    except RuntimeError:
+        last_state = -1
+        
+    if last_state == current_state:
+        # State has not changed, exit
+        return
+        
+    # Store current selection
+    selection = cmds.ls(selection=True, long=False)
+    
+    # Get all object names from the Locator (stored as string attributes)
+    try:
+        FK_Joint_Root = cmds.getAttr("{}.FK_Joint_Root".format(locator_name))
+        FK_Joint_Mid = cmds.getAttr("{}.FK_Joint_Mid".format(locator_name))
+        FK_Joint_End = cmds.getAttr("{}.FK_Joint_End".format(locator_name))
+        FK_Ctrl_Root = cmds.getAttr("{}.FK_Ctrl_Root".format(locator_name))
+        FK_Ctrl_Mid = cmds.getAttr("{}.FK_Ctrl_Mid".format(locator_name))
+        FK_Ctrl_End = cmds.getAttr("{}.FK_Ctrl_End".format(locator_name))
+        IK_Joint_Root = cmds.getAttr("{}.IK_Joint_Root".format(locator_name))
+        IK_Joint_Mid = cmds.getAttr("{}.IK_Joint_Mid".format(locator_name))
+        IK_Joint_End = cmds.getAttr("{}.IK_Joint_End".format(locator_name))
+        IK_Ctrl_Root = cmds.getAttr("{}.IK_Ctrl_Root".format(locator_name))
+        IK_Ctrl_Pole = cmds.getAttr("{}.IK_Ctrl_Pole".format(locator_name))
+    except Exception as e:
+        cmds.error("Failed to retrieve object names from Locator {}: {}".format(locator_name, e))
+        return
+
+    # Get Min/Max values for the blend attribute
+    try:
+        attr_min = cmds.attributeQuery(switch_attr_name, node=switch_ctrl, minimum=True)
+        attr_max = cmds.attributeQuery(switch_attr_name, node=switch_ctrl, maximum=True)
+        min_val = attr_min[0] if attr_min else 0.0
+        max_val = attr_max[0] if attr_max else 1.0
+    except Exception:
+        cmds.warning("Could not query min/max values for blend attribute. Defaulting to 0 and 1.")
+        min_val = 0.0
+        max_val = 1.0
+
+    current_time = cmds.currentTime(query=True)
+    
+    # Set keyframes on all controls before switching (MEL lines 504-508)
+    cmds.setKeyframe(FK_Ctrl_Root)
+    cmds.setKeyframe(FK_Ctrl_Mid)
+    cmds.setKeyframe(FK_Ctrl_End)
+    cmds.setKeyframe(IK_Ctrl_Root)
+    cmds.setKeyframe(IK_Ctrl_Pole)
+
+    # **MATCHING LOGIC**
+    if current_state == 0:  # Switch to IK (IKFK_Seamless: IK)
+        
+        # 1. Match IK Ctrl Root (End Controller) - Using temp groups to preserve rotation offset
+        # This matches the MEL version's approach (lines 510-519)
+        tempGroup_A = cmds.group(empty=True)
+        tempGroup_B = cmds.group(empty=True)
+        
+        # Step 1: Match both temp groups to IK_Joint_End
+        cmds.delete(cmds.parentConstraint(IK_Joint_End, tempGroup_A, weight=1))
+        cmds.delete(cmds.parentConstraint(IK_Joint_End, tempGroup_B, weight=1))
+        
+        # Step 2: Apply IK_Ctrl_Root's current orientation to tempGroup_B (preserve rotation offset)
+        cmds.delete(cmds.orientConstraint(IK_Ctrl_Root, tempGroup_B, offset=(0, 0, 0), weight=1))
+        
+        # Step 3: Parent tempGroup_B under tempGroup_A to create hierarchy
+        cmds.parent(tempGroup_B, tempGroup_A)
+        
+        # Step 4: Match tempGroup_A to FK_Joint_End (this moves the hierarchy)
+        cmds.delete(cmds.parentConstraint(FK_Joint_End, tempGroup_A, weight=1))
+        
+        # Step 5: Apply tempGroup_B's final transform to IK_Ctrl_Root
+        con_A = cmds.parentConstraint(tempGroup_B, IK_Ctrl_Root, weight=1)
+        cmds.setKeyframe(IK_Ctrl_Root)
+        cmds.delete(con_A)
+        
+        # 2. Calculate Pole Vector position based on FK chain bend direction
+        # Get world space positions of FK joints
+        pos_root = cmds.xform(FK_Joint_Root, query=True, worldSpace=True, translation=True)
+        pos_mid = cmds.xform(FK_Joint_Mid, query=True, worldSpace=True, translation=True)
+        pos_end = cmds.xform(FK_Joint_End, query=True, worldSpace=True, translation=True)
+        
+        # Calculate the bend direction using vector projection
+        # Vector from root to end (main chain direction)
+        vec_RE = [pos_end[i] - pos_root[i] for i in range(3)]
+        # Vector from root to mid
+        vec_RM = [pos_mid[i] - pos_root[i] for i in range(3)]
+        
+        # Length of main chain vector
+        len_RE = math.sqrt(sum(vec_RE[i]**2 for i in range(3)))
+        
+        if len_RE > 0.0001:  # Avoid division by zero
+            # Normalize the main chain vector
+            norm_RE = [vec_RE[i] / len_RE for i in range(3)]
+            
+            # Project vec_RM onto vec_RE to find the projection point
+            proj_scalar = sum(vec_RM[i] * norm_RE[i] for i in range(3))
+            proj_vec = [proj_scalar * norm_RE[i] for i in range(3)]
+            
+            # Perpendicular vector (from projection point to mid joint)
+            vec_perp = [vec_RM[i] - proj_vec[i] for i in range(3)]
+            len_perp = math.sqrt(sum(vec_perp[i]**2 for i in range(3)))
+            
+            if len_perp > 0.0001:  # Chain has a bend
+                # Normalize perpendicular vector
+                norm_perp = [vec_perp[i] / len_perp for i in range(3)]
+                
+                # Extension distance: use chain length as reference
+                # Multiply by a factor to place pole vector at a reasonable distance
+                extend_dist = len_RE * 0.5
+                
+                # Pole Vector position = mid joint + perpendicular direction * extension distance
+                pole_pos = [pos_mid[i] + norm_perp[i] * extend_dist for i in range(3)]
+                
+            else:  # Chain is straight, use a default offset
+                # If straight, offset along Z-axis (or another appropriate axis)
+                pole_pos = [pos_mid[0], pos_mid[1], pos_mid[2] + len_RE * 0.5]
+        else:
+            # Fallback: keep current position if chain length is zero
+            pole_pos = cmds.xform(IK_Ctrl_Pole, query=True, worldSpace=True, translation=True)
+        
+        # Apply calculated position to Pole Vector
+        cmds.xform(IK_Ctrl_Pole, worldSpace=True, translation=pole_pos)
+        cmds.setKeyframe(IK_Ctrl_Pole)
+        
+        # Clean up temp groups
+        cmds.delete(tempGroup_A)
+        
+        # 3. Switch attribute: from FK (min_val) to IK (max_val)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), min_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time - 1)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), max_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time)
+        
+        
+    elif current_state == 1:  # Switch to FK (IKFK_Seamless: FK)
+        
+        # Match FK controls to IK joints (MEL lines 530-538)
+        # Use weight=1 instead of maintainOffset to match MEL behavior
+        
+        # 1. Match FK Ctrl Root to IK Joint Root
+        con_A = cmds.parentConstraint(IK_Joint_Root, FK_Ctrl_Root, weight=1)
+        cmds.setKeyframe(FK_Ctrl_Root)
+        cmds.delete(con_A)
+
+        # 2. Match FK Ctrl Mid to IK Joint Mid
+        con_B = cmds.parentConstraint(IK_Joint_Mid, FK_Ctrl_Mid, weight=1)
+        cmds.setKeyframe(FK_Ctrl_Mid)
+        cmds.delete(con_B)
+        
+        # 3. Match FK Ctrl End to IK Joint End
+        con_C = cmds.parentConstraint(IK_Joint_End, FK_Ctrl_End, weight=1)
+        cmds.setKeyframe(FK_Ctrl_End)
+        cmds.delete(con_C)
+        
+        # 4. Switch attribute: from IK (max_val) to FK (min_val)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), max_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time - 1)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), min_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time)
+
+    # Update optionVar
+    cmds.optionVar(intValue=(option_var_name, current_state))
+    
+    # Restore selection
+    if selection:
+        cmds.select(selection, replace=True)
+
+
+def sg_SeamlessSwitching(
+    FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, 
+    FK_Ctrl_Root, FK_Ctrl_Mid, FK_Ctrl_End,
+    IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, 
+    IK_Ctrl_Root, IK_Ctrl_Pole,
+    Switch_Ctrl, Switch_Attr
+):
+    """
+    Sets up the necessary nodes, attributes, and the scriptJob for IK/FK switching.
+    """
+    
+    # 1. Ensure all objects exist
+    all_objects = [FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, FK_Ctrl_Root, FK_Ctrl_Mid, 
+                   FK_Ctrl_End, IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, IK_Ctrl_Root, 
+                   IK_Ctrl_Pole, Switch_Ctrl]
+    
+    for obj in all_objects:
+        if not cmds.objExists(obj):
+            cmds.error("Object not found: '{}'. Please verify all joint and controller names.".format(obj))
+            return
+    
+    # 2. Cleanup and Create Locator
+    LOCATOR_NAME = "{}_Switch_Locator".format(Switch_Ctrl)
+    
+    matching_locators = cmds.ls(LOCATOR_NAME + "*", type='transform')
+    final_locators_to_delete = []
+    for loc in matching_locators:
+        if loc.startswith(LOCATOR_NAME) and cmds.listRelatives(loc, shapes=True, type='locator'):
+            final_locators_to_delete.append(loc)
+    
+    if final_locators_to_delete:
+        cmds.warning("Found and deleting {} existing switch locators for {}: {}".format(
+            len(final_locators_to_delete), Switch_Ctrl, final_locators_to_delete))
+        try:
+            cmds.delete(final_locators_to_delete)
+        except Exception as e:
+            cmds.warning("Failed to delete old locators: {}".format(e))
+    
+    # Recreate Locator
+    locator_shape = cmds.createNode("locator", name=LOCATOR_NAME + "Shape") 
+    locator = cmds.listRelatives(locator_shape, parent=True)[0]
+    locator = cmds.rename(locator, LOCATOR_NAME) 
+    
+    cmds.parent(locator, Switch_Ctrl)
+
+    # Unlock and clear transform attributes
+    for attr in ['tx', 'ty', 'tz', 'rx', 'ry', 'rz', 'sx', 'sy', 'sz', 'v']:
+        full_attr = "{}.{}".format(locator, attr)
+        cmds.setAttr(full_attr, lock=False)
+        connections = cmds.listConnections(full_attr, plugs=True, destination=False, source=True)
+        if connections:
+             cmds.disconnectAttr(connections[0], full_attr)
+
+    # Reset and hide Locator
+    cmds.setAttr("{}.t".format(locator), 0, 0, 0)
+    cmds.setAttr("{}.r".format(locator), 0, 0, 0)
+    cmds.setAttr("{}.s".format(locator), 1, 1, 1)
+    cmds.setAttr("{}.visibility".format(locator), 0)
+
+
+    # 3. Add IKFK_Seamless attribute to Switch Ctrl
+    if not cmds.attributeQuery("IKFK_Seamless", node=Switch_Ctrl, exists=True):
+        cmds.addAttr(Switch_Ctrl, longName="IKFK_Seamless", attributeType="enum", 
+                     enumName="IK:FK:", keyable=False)
+        cmds.setAttr("{}.IKFK_Seamless".format(Switch_Ctrl), channelBox=True)
+
+    # 4. Add config attributes to Locator and connect
+    
+    config_map = {
+        "IKFK_Seamless_Switching": LOCATOR_NAME,
+        "FK_Joint_Root": FK_Joint_Root,
+        "FK_Joint_Mid": FK_Joint_Mid,
+        "FK_Joint_End": FK_Joint_End,
+        "FK_Ctrl_Root": FK_Ctrl_Root,
+        "FK_Ctrl_Mid": FK_Ctrl_Mid,
+        "FK_Ctrl_End": FK_Ctrl_End,
+        "IK_Joint_Root": IK_Joint_Root,
+        "IK_Joint_Mid": IK_Joint_Mid,
+        "IK_Joint_End": IK_Joint_End,
+        "IK_Ctrl_Root": IK_Ctrl_Root,
+        "IK_Ctrl_Pole": IK_Ctrl_Pole,
+        "Switch_Ctrl": Switch_Ctrl,
+        "Switch_Attr": Switch_Attr,
+    }
+
+    for attr_name, value in config_map.items():
+        attr_full_name = "{}.{}".format(locator, attr_name)
+        
+        if not cmds.attributeQuery(attr_name, node=locator, exists=True):
+            cmds.addAttr(locator, longName=attr_name, dataType="string", keyable=True)
+
+        cmds.setAttr(attr_full_name, value, type="string")
+
+    # 6. Set up scriptJob (Uses the full module path)
+    # Note: Old scriptJobs will be automatically replaced when the same attribute is monitored 
+
+    # The command string for scriptJob - pure Python code
+    # Format: 'import module; module.sg_switching("locator_name")'
+    command = 'import {0}; {0}.sg_switching("{1}")'.format(MODULE_NAME, LOCATOR_NAME)
+    
+    try:
+        cmds.scriptJob(attributeChange=["{}.IKFK_Seamless".format(Switch_Ctrl), command], 
+                       killWithScene=True)
+        
+        cmds.inViewMessage(message='IK/FK Seamless Switching Built for: <hl>{}</hl>'.format(Switch_Ctrl), 
+                            position='topCenter', fade=True)
+                            
+    except Exception as e:
+        cmds.error("Failed to set up scriptJob: {}. Command was: {}".format(e, command))
+        return
+
+if __name__ == "__main__":
+    IKFK_Switch_UI()

2023/shelves/shelf_Nexus_Animation.mel

@@ -49,62 +49,27 @@ global proc shelf_Nexus_Animation () {
         -manage 1
         -visible 1
         -preventOverride 0
-        -annotation "IK/FK Switcher - Build temporary IK/FK setup on any rig" 
+        -annotation "IKFK Switch - Seamless switching between IK and FK animation" 
         -enableBackground 0
         -backgroundColor 0 0 0 
         -highlightColor 0.321569 0.521569 0.65098 
         -align "center" 
-        -label "IK/FK" 
+        -label "IKFK" 
         -labelOffset 0
         -rotation 0
         -flipX 0
         -flipY 0
         -useAlpha 1
         -font "plainLabelFont" 
-        -imageOverlayLabel "IK/FK" 
+        -imageOverlayLabel "IKFK" 
         -overlayLabelColor 0.8 0.8 0.8 
         -overlayLabelBackColor 0 0 0 0.5 
-        -image "ik_fk_switcher.png" 
-        -image1 "ik_fk_switcher.png" 
+        -image "ikfk_switch.png" 
+        -image1 "ikfk_switch.png" 
         -style "iconOnly" 
         -marginWidth 0
         -marginHeight 1
-        -command "import animation_tools.ik_fk_switcher\nanimation_tools.ik_fk_switcher.user_interface()" 
-        -sourceType "python" 
-        -commandRepeatable 1
-        -flat 1
-    ;
-    shelfButton
-        -enableCommandRepeat 1
-        -flexibleWidthType 3
-        -flexibleWidthValue 32
-        -enable 1
-        -width 35
-        -height 34
-        -manage 1
-        -visible 1
-        -preventOverride 0
-        -annotation "Advanced IK/FK Switch - Switch between IK and FK for ADV rigs" 
-        -enableBackground 0
-        -backgroundColor 0 0 0 
-        -highlightColor 0.321569 0.521569 0.65098 
-        -align "center" 
-        -label "AdvIKFK" 
-        -labelOffset 0
-        -rotation 0
-        -flipX 0
-        -flipY 0
-        -useAlpha 1
-        -font "plainLabelFont" 
-        -imageOverlayLabel "AdvIKFK" 
-        -overlayLabelColor 0.8 0.8 0.8 
-        -overlayLabelBackColor 0 0 0 0.5 
-        -image "advIkFkSwitch.png" 
-        -image1 "advIkFkSwitch.png" 
-        -style "iconOnly" 
-        -marginWidth 0
-        -marginHeight 1
-        -command "import animation_tools.advIkFkSwitch\nanimation_tools.advIkFkSwitch.IkFk(False)" 
+        -command "from animation_tools import ikfk_switch\nikfk_switch.IKFK_Switch_UI()" 
         -sourceType "python" 
         -commandRepeatable 1
         -flat 1

2025/scripts/animation_tools/IKFK_SWITCH_README.md

@@ -0,0 +1,144 @@
+# IKFK Switch Tool
+
+## 概述
+IKFK Switch Tool 是一个用于在Maya中实现IK和FK动画之间无缝切换的工具。该工具从原始MEL脚本转换为Python版本，提供更好的跨版本兼容性。
+
+## 版本信息
+- **版本**: V1.0
+- **兼容性**: Maya 2018+
+- **语言**: Python
+- **原始版本**: MEL (ikfk_switch.mel)
+
+## 功能特性
+
+### 主要功能
+1. **无缝切换**: 在IK和FK动画之间进行无缝切换，保持动画连续性
+2. **自动匹配**: 切换时自动匹配控制器位置和旋转
+3. **关键帧设置**: 自动在切换点设置关键帧
+4. **预设支持**: 内置ADV绑定预设，支持快速设置
+
+### UI功能
+- **FK控制器加载**: 加载FK骨骼和控制器
+  - FK Joint Root/Mid/End
+  - FK Ctrl Root/Mid/End
+  
+- **IK控制器加载**: 加载IK骨骼和控制器
+  - IK Joint Root/Mid/End
+  - IK Ctrl Root (IK手柄)
+  - IK Ctrl Pole (极向量控制器)
+  
+- **切换控制器**: 设置切换属性
+  - Switch Ctrl (切换控制器)
+  - Switch Attr (切换属性名称)
+
+### 辅助功能
+- **ADV Build**: 快速为ADV绑定设置IKFK切换
+- **Empty**: 清空所有输入字段
+- **BiliBili**: 打开教程链接
+
+## 使用方法
+
+### 基本使用流程
+
+1. **加载FK控制器**
+   - 选择FK骨骼根节点，点击"< FK Joint Root"
+   - 选择FK骨骼中间节点，点击"< FK Joint Mid"
+   - 选择FK骨骼末端节点，点击"< FK Joint End"
+   - 重复以上步骤加载FK控制器
+
+2. **加载IK控制器**
+   - 选择IK骨骼节点，点击相应按钮
+   - 选择IK控制器和极向量控制器
+
+3. **设置切换控制器**
+   - 选择用于切换的控制器，点击"< Switch Ctrl"
+   - 在通道盒中选择切换属性，点击"< Switch Attr"
+
+4. **构建切换系统**
+   - 点击"<<< Build Seamless Switching >>>"按钮
+   - 系统会自动创建必要的属性和脚本节点
+
+5. **使用切换功能**
+   - 在切换控制器上找到"IKFK_Seamless"属性
+   - 切换该属性值（IK=0, FK=1）即可实现无缝切换
+
+### ADV绑定快速设置
+
+如果使用ADV绑定系统，可以使用预设功能：
+1. 展开"Edit"面板
+2. 点击"<<< ADV Build >>>"
+3. 系统会自动为左右手臂和腿部设置IKFK切换
+
+## 技术实现
+
+### 核心组件
+
+1. **IKFKSwitchUI类**: UI界面管理
+   - 创建和管理UI窗口
+   - 处理用户输入
+   - 调用切换逻辑
+
+2. **seamless_switching函数**: 核心切换逻辑
+   - 创建数据存储locator
+   - 添加必要属性
+   - 建立属性连接
+   - 创建脚本节点
+
+3. **create_switching_script函数**: 创建全局切换脚本
+   - 使用MEL脚本实现切换逻辑
+   - 处理约束和关键帧
+
+4. **create_script_job函数**: 创建脚本任务
+   - 监听属性变化
+   - 自动触发切换
+
+### 兼容性设计
+
+- 使用`maya.cmds`和`maya.mel`模块，确保跨版本兼容
+- 避免使用版本特定的API
+- 使用f-string格式化（Python 3.6+）
+- 异常处理确保稳定性
+
+## 工具架集成
+
+该工具已集成到Nexus Animation工具架：
+- **图标**: ikfk_switch.png
+- **位置**: 动画工具架末尾
+- **调用**: `import animation_tools.ikfx_switch; animation_tools.ikfx_switch.show()`
+
+## 文件位置
+
+### Maya 2023
+- 脚本: `scripts/animation_tools/ikfx_switch.py`
+- 图标: `icons/ikfk_switch.png`
+- 工具架: `shelves/shelf_Nexus_Animation.mel`
+
+### Maya 2025
+- 脚本: `scripts/animation_tools/ikfx_switch.py`
+- 图标: `icons/ikfk_switch.png`
+- 工具架: `shelves/shelf_Nexus_Animation.mel`
+
+## 注意事项
+
+1. **属性要求**: 切换属性必须有最小值和最大值设置
+2. **命名规范**: 建议使用清晰的命名规范以便识别
+3. **关键帧**: 切换会在当前帧和前一帧设置关键帧
+4. **选择保持**: 切换后会恢复原始选择
+
+## 故障排除
+
+### 常见问题
+
+1. **切换不工作**
+   - 检查所有必需的对象是否存在
+   - 确认切换属性已正确设置
+   - 查看脚本编辑器的错误信息
+
+2. **位置不匹配**
+   - 确保FK和IK骨骼层级正确
+   - 检查约束设置
+   - 验证控制器方向
+
+3. **属性加载失败**
+   - 确保在通道盒中选择了属性
+   - 检查属性是否可关键帧化

2025/scripts/animation_tools/ikfk_switch.py

@@ -0,0 +1,603 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import maya.cmds as cmds
+import maya.mel as mel
+import math
+import sys
+import inspect
+import importlib 
+
+# Crucial for fixing namespace issues:
+# Dynamically gets the module name (e.g., 'animation_tools.ikfk_switch') 
+
+MODULE_NAME = __name__
+
+# ==============================================================================
+# UI Creation
+# ==============================================================================
+
+def IKFK_Switch_UI():
+    """
+    Creates the main IK/FK switch Maya window interface.
+    """
+    WINDOW_NAME = "IKFK_Switch_UI"
+    WINDOW_TITLE = "IK/FK Switch V2.9 (Final Button Fix)"
+    WINDOW_WIDTH = 300
+    
+    # Check if window exists and delete it
+    if cmds.window(WINDOW_NAME, exists=True):
+        cmds.deleteUI(WINDOW_NAME, window=True)
+    
+    # Create window
+    cmds.window(WINDOW_NAME, width=WINDOW_WIDTH, title=WINDOW_TITLE)
+    
+    # Main Layout
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=1)
+    
+    # --- Helper function for button commands ---
+    # CORE FIX: Removed the 'python("...")' wrapper. 
+    # The function now returns a pure Python command string for button execution.
+    def py_cmd(func_name, args=""):
+        # Format: 'import module; module.function("args")' (Pure Python string)
+        if args:
+            # Use double quotes to avoid escaping issues
+            return 'import {0}; {0}.{1}("{2}")'.format(MODULE_NAME, func_name, args)
+        else:
+            return 'import {0}; {0}.{1}()'.format(MODULE_NAME, func_name)
+
+    # --- Edit Section ---
+    cmds.frameLayout(label="Edit", collapse=True, collapsable=True, 
+                     collapseCommand="cmds.window('{}', edit=True, height=578)".format(WINDOW_NAME),
+                     expandCommand="cmds.window('{}', edit=True, height=578)".format(WINDOW_NAME))
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    cmds.button(label="<<< ADV Build >>>", command=py_cmd("sg_ADV_Build"))
+    cmds.button(label="<<< Empty >>>", command=py_cmd("sg_Empty"))
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load FK Ctrl Section ---
+    cmds.frameLayout(label="Load FK Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # FK Joint Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_01", text="", placeholderText="FK Joint Root")
+    cmds.button(label="< FK Joint Root", command=py_cmd("sg_setTextField", "target_01"))
+    cmds.setParent("..")
+    
+    # FK Joint Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_02", text="", placeholderText="FK Joint Mid")
+    cmds.button(label="< FK Joint Mid", command=py_cmd("sg_setTextField", "target_02"))
+    cmds.setParent("..")
+    
+    # FK Joint End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_03", text="", placeholderText="FK Joint End")
+    cmds.button(label="< FK Joint End", command=py_cmd("sg_setTextField", "target_03"))
+    cmds.setParent("..")
+    
+    cmds.separator(style="in", height=5)
+    
+    # FK Ctrl Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_04", text="", placeholderText="FK Ctrl Root")
+    cmds.button(label="< FK Ctrl Root", command=py_cmd("sg_setTextField", "target_04"))
+    cmds.setParent("..")
+    
+    # FK Ctrl Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_05", text="", placeholderText="FK Ctrl Mid")
+    cmds.button(label="< FK Ctrl Mid", command=py_cmd("sg_setTextField", "target_05"))
+    cmds.setParent("..")
+    
+    # FK Ctrl End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_06", text="", placeholderText="FK Ctrl End")
+    cmds.button(label="< FK Ctrl End", command=py_cmd("sg_setTextField", "target_06"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load IK Ctrl Section ---
+    cmds.frameLayout(label="Load IK Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # IK Joint Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_07", text="", placeholderText="IK Joint Root")
+    cmds.button(label="< IK Joint Root", command=py_cmd("sg_setTextField", "target_07"))
+    cmds.setParent("..")
+    
+    # IK Joint Mid
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_08", text="", placeholderText="IK Joint Mid")
+    cmds.button(label="< IK Joint Mid", command=py_cmd("sg_setTextField", "target_08"))
+    cmds.setParent("..")
+    
+    # IK Joint End
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_09", text="", placeholderText="IK Joint End")
+    cmds.button(label="< IK Joint End", command=py_cmd("sg_setTextField", "target_09"))
+    cmds.setParent("..")
+    
+    cmds.separator(style="in", height=5)
+    
+    # IK Ctrl Root
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_10", text="", placeholderText="IK Ctrl Root")
+    cmds.button(label="< IK Ctrl Root", command=py_cmd("sg_setTextField", "target_10"))
+    cmds.setParent("..")
+    
+    # IK Ctrl Pole
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_11", text="", placeholderText="IK Ctrl Pole")
+    cmds.button(label="< IK Ctrl Pole", command=py_cmd("sg_setTextField", "target_11"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    # --- Load Switch Ctrl Section ---
+    cmds.frameLayout(label="Load Switch Ctrl")
+    cmds.columnLayout(adjustableColumn=True, rowSpacing=2)
+    
+    # Switch Ctrl
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_12", text="", placeholderText="Switch Ctrl")
+    cmds.button(label="< Switch Ctrl", command=py_cmd("sg_setTextField", "target_12"))
+    cmds.setParent("..")
+    
+    # Switch Attr
+    cmds.rowLayout(numberOfColumns=2, columnWidth2=(45, 120), adjustableColumn=1)
+    cmds.textField("target_13", text="", placeholderText="Switch Attr Name")
+    cmds.button(label="< Switch Attr", command=py_cmd("sg_setLoadAttr"))
+    cmds.setParent("..")
+    
+    cmds.setParent("..") 
+    cmds.setParent("..") 
+    
+    cmds.separator(style="in", height=5)
+    
+    # Build Button
+    cmds.button(height=32, label="<<< Build Seamless Switching >>>", command=py_cmd("sg_Execute"))
+    
+    cmds.setParent("..") 
+    
+    # Adjust window height and show
+    cmds.window(WINDOW_NAME, edit=True, height=578)
+    cmds.showWindow(WINDOW_NAME)
+
+
+def sg_setTextField(target):
+    """
+    Sets the name of the currently selected object into the specified text field.
+    """
+    selection = cmds.ls(selection=True, long=False)
+    
+    if selection:
+        selected_object = selection[0]
+        cmds.textField(target, edit=True, text=selected_object)
+    else:
+        cmds.warning("Please select an object.")
+
+
+def sg_setLoadAttr():
+    """
+    Sets the name of the selected attribute in the Channel Box into the target_13 text field.
+    """
+    # Query selected attributes in the Channel Box
+    attrs = cmds.channelBox("mainChannelBox", query=True, selectedMainAttributes=True)
+    
+    if not attrs:
+        cmds.error("Select an attribute in the Channel Box...")
+        return
+        
+    # Take only the first selected attribute
+    attribute_name = attrs[0]
+    cmds.textField("target_13", edit=True, text=attribute_name)
+
+
+def sg_Execute():
+    """
+    Reads all values from UI controls and calls the sg_SeamlessSwitching function.
+    """
+    # Get values from UI controls
+    FK_Joint_Root = cmds.textField("target_01", query=True, text=True)
+    FK_Joint_Mid = cmds.textField("target_02", query=True, text=True)
+    FK_Joint_End = cmds.textField("target_03", query=True, text=True)
+    FK_Ctrl_Root = cmds.textField("target_04", query=True, text=True)
+    FK_Ctrl_Mid = cmds.textField("target_05", query=True, text=True)
+    FK_Ctrl_End = cmds.textField("target_06", query=True, text=True)
+    IK_Joint_Root = cmds.textField("target_07", query=True, text=True)
+    IK_Joint_Mid = cmds.textField("target_08", query=True, text=True)
+    IK_Joint_End = cmds.textField("target_09", query=True, text=True)
+    IK_Ctrl_Root = cmds.textField("target_10", query=True, text=True)
+    IK_Ctrl_Pole = cmds.textField("target_11", query=True, text=True)
+    Switch_Ctrl = cmds.textField("target_12", query=True, text=True)
+    Switch_Attr = cmds.textField("target_13", query=True, text=True)
+    
+    # Check for empty values
+    all_targets = [FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, FK_Ctrl_Root, FK_Ctrl_Mid, 
+                   FK_Ctrl_End, IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, IK_Ctrl_Root, 
+                   IK_Ctrl_Pole, Switch_Ctrl, Switch_Attr]
+    
+    for target in all_targets:
+        if not target:
+            cmds.error("All fields must be filled before building the switch.")
+            return
+
+    # Call core build function
+    sg_SeamlessSwitching(
+        FK_Joint_Root,
+        FK_Joint_Mid,
+        FK_Joint_End,
+        FK_Ctrl_Root,
+        FK_Ctrl_Mid,
+        FK_Ctrl_End,
+        IK_Joint_Root,
+        IK_Joint_Mid,
+        IK_Joint_End,
+        IK_Ctrl_Root,
+        IK_Ctrl_Pole,
+        Switch_Ctrl,
+        Switch_Attr
+    )
+
+
+def sg_ADV_Build():
+    """
+    Builds IK/FK switching for sample limbs using preset naming conventions.
+    NOTE: Modify names here to match your Rig naming convention.
+    """
+    
+    # Right Arm 
+    sg_SeamlessSwitching(
+        "FKXShoulder_R", "FKXElbow_R", "FKXWrist_R",
+        "FKShoulder_R", "FKElbow_R", "FKWrist_R",
+        "IKXShoulder_R", "IKXElbow_R", "IKXWrist_R",
+        "IKArm_R", "PoleArm_R", "FKIKArm_R", "fkik"
+    )
+    
+    # Left Arm
+    sg_SeamlessSwitching(
+        "FKXShoulder_L", "FKXElbow_L", "FKXWrist_L",
+        "FKShoulder_L", "FKElbow_L", "FKWrist_L",
+        "IKXShoulder_L", "IKXElbow_L", "IKXWrist_L",
+        "IKArm_L", "PoleArm_L", "FKIKArm_L", "fkik"
+    )
+    
+    # Right Leg
+    sg_SeamlessSwitching(
+        "FKXHip_R", "FKXKnee_R", "FKXAnkle_R",
+        "FKHip_R", "FKKnee_R", "FKAnkle_R",
+        "IKXHip_R", "IKXKnee_R", "IKXAnkle_R",
+        "IKLeg_R", "PoleLeg_R", "FKIKLeg_R", "fkik"
+    )
+    
+    # Left Leg
+    sg_SeamlessSwitching(
+        "FKXHip_L", "FKXKnee_L", "FKXAnkle_L",
+        "FKHip_L", "FKKnee_L", "FKAnkle_L",
+        "IKXHip_L", "IKXKnee_L", "IKXAnkle_L",
+        "IKLeg_L", "PoleLeg_L", "FKIKLeg_L", "fkik"
+    )
+
+def sg_Empty():
+    """
+    Clears all text fields in the UI.
+    """
+    for i in range(1, 14):
+        target_name = "target_{:02d}".format(i)
+        if cmds.textField(target_name, exists=True):
+            cmds.textField(target_name, edit=True, text="")
+
+
+# ==============================================================================
+# Core IK/FK Switching Logic
+# ==============================================================================
+
+def sg_switching(locator_name):
+    """
+    Executes the core IK/FK switching logic (seamless match).
+    This function is called at runtime by the scriptJob.
+    
+    Args:
+        locator_name (str): The name of the Locator storing connection info.
+    """
+    
+    # Get the Switch Control and attribute name (stored as string attributes)
+    try:
+        switch_ctrl = cmds.getAttr("{}.Switch_Ctrl".format(locator_name))
+        switch_attr_name = cmds.getAttr("{}.Switch_Attr".format(locator_name))
+    except:
+        cmds.error("Locator {} does not have required attributes.".format(locator_name))
+        return
+    
+    # State check: Use optionVar to store the last state, preventing redundant execution
+    option_var_name = locator_name  
+    current_state = cmds.getAttr("{}.IKFK_Seamless".format(switch_ctrl))
+    
+    try:
+        last_state = cmds.optionVar(query=option_var_name)
+    except RuntimeError:
+        last_state = -1
+        
+    if last_state == current_state:
+        # State has not changed, exit
+        return
+        
+    # Store current selection
+    selection = cmds.ls(selection=True, long=False)
+    
+    # Get all object names from the Locator (stored as string attributes)
+    try:
+        FK_Joint_Root = cmds.getAttr("{}.FK_Joint_Root".format(locator_name))
+        FK_Joint_Mid = cmds.getAttr("{}.FK_Joint_Mid".format(locator_name))
+        FK_Joint_End = cmds.getAttr("{}.FK_Joint_End".format(locator_name))
+        FK_Ctrl_Root = cmds.getAttr("{}.FK_Ctrl_Root".format(locator_name))
+        FK_Ctrl_Mid = cmds.getAttr("{}.FK_Ctrl_Mid".format(locator_name))
+        FK_Ctrl_End = cmds.getAttr("{}.FK_Ctrl_End".format(locator_name))
+        IK_Joint_Root = cmds.getAttr("{}.IK_Joint_Root".format(locator_name))
+        IK_Joint_Mid = cmds.getAttr("{}.IK_Joint_Mid".format(locator_name))
+        IK_Joint_End = cmds.getAttr("{}.IK_Joint_End".format(locator_name))
+        IK_Ctrl_Root = cmds.getAttr("{}.IK_Ctrl_Root".format(locator_name))
+        IK_Ctrl_Pole = cmds.getAttr("{}.IK_Ctrl_Pole".format(locator_name))
+    except Exception as e:
+        cmds.error("Failed to retrieve object names from Locator {}: {}".format(locator_name, e))
+        return
+
+    # Get Min/Max values for the blend attribute
+    try:
+        attr_min = cmds.attributeQuery(switch_attr_name, node=switch_ctrl, minimum=True)
+        attr_max = cmds.attributeQuery(switch_attr_name, node=switch_ctrl, maximum=True)
+        min_val = attr_min[0] if attr_min else 0.0
+        max_val = attr_max[0] if attr_max else 1.0
+    except Exception:
+        cmds.warning("Could not query min/max values for blend attribute. Defaulting to 0 and 1.")
+        min_val = 0.0
+        max_val = 1.0
+
+    current_time = cmds.currentTime(query=True)
+    
+    # Set keyframes on all controls before switching (MEL lines 504-508)
+    cmds.setKeyframe(FK_Ctrl_Root)
+    cmds.setKeyframe(FK_Ctrl_Mid)
+    cmds.setKeyframe(FK_Ctrl_End)
+    cmds.setKeyframe(IK_Ctrl_Root)
+    cmds.setKeyframe(IK_Ctrl_Pole)
+
+    # **MATCHING LOGIC**
+    if current_state == 0:  # Switch to IK (IKFK_Seamless: IK)
+        
+        # 1. Match IK Ctrl Root (End Controller) - Using temp groups to preserve rotation offset
+        # This matches the MEL version's approach (lines 510-519)
+        tempGroup_A = cmds.group(empty=True)
+        tempGroup_B = cmds.group(empty=True)
+        
+        # Step 1: Match both temp groups to IK_Joint_End
+        cmds.delete(cmds.parentConstraint(IK_Joint_End, tempGroup_A, weight=1))
+        cmds.delete(cmds.parentConstraint(IK_Joint_End, tempGroup_B, weight=1))
+        
+        # Step 2: Apply IK_Ctrl_Root's current orientation to tempGroup_B (preserve rotation offset)
+        cmds.delete(cmds.orientConstraint(IK_Ctrl_Root, tempGroup_B, offset=(0, 0, 0), weight=1))
+        
+        # Step 3: Parent tempGroup_B under tempGroup_A to create hierarchy
+        cmds.parent(tempGroup_B, tempGroup_A)
+        
+        # Step 4: Match tempGroup_A to FK_Joint_End (this moves the hierarchy)
+        cmds.delete(cmds.parentConstraint(FK_Joint_End, tempGroup_A, weight=1))
+        
+        # Step 5: Apply tempGroup_B's final transform to IK_Ctrl_Root
+        con_A = cmds.parentConstraint(tempGroup_B, IK_Ctrl_Root, weight=1)
+        cmds.setKeyframe(IK_Ctrl_Root)
+        cmds.delete(con_A)
+        
+        # 2. Calculate Pole Vector position based on FK chain bend direction
+        # Get world space positions of FK joints
+        pos_root = cmds.xform(FK_Joint_Root, query=True, worldSpace=True, translation=True)
+        pos_mid = cmds.xform(FK_Joint_Mid, query=True, worldSpace=True, translation=True)
+        pos_end = cmds.xform(FK_Joint_End, query=True, worldSpace=True, translation=True)
+        
+        # Calculate the bend direction using vector projection
+        # Vector from root to end (main chain direction)
+        vec_RE = [pos_end[i] - pos_root[i] for i in range(3)]
+        # Vector from root to mid
+        vec_RM = [pos_mid[i] - pos_root[i] for i in range(3)]
+        
+        # Length of main chain vector
+        len_RE = math.sqrt(sum(vec_RE[i]**2 for i in range(3)))
+        
+        if len_RE > 0.0001:  # Avoid division by zero
+            # Normalize the main chain vector
+            norm_RE = [vec_RE[i] / len_RE for i in range(3)]
+            
+            # Project vec_RM onto vec_RE to find the projection point
+            proj_scalar = sum(vec_RM[i] * norm_RE[i] for i in range(3))
+            proj_vec = [proj_scalar * norm_RE[i] for i in range(3)]
+            
+            # Perpendicular vector (from projection point to mid joint)
+            vec_perp = [vec_RM[i] - proj_vec[i] for i in range(3)]
+            len_perp = math.sqrt(sum(vec_perp[i]**2 for i in range(3)))
+            
+            if len_perp > 0.0001:  # Chain has a bend
+                # Normalize perpendicular vector
+                norm_perp = [vec_perp[i] / len_perp for i in range(3)]
+                
+                # Extension distance: use chain length as reference
+                # Multiply by a factor to place pole vector at a reasonable distance
+                extend_dist = len_RE * 0.5
+                
+                # Pole Vector position = mid joint + perpendicular direction * extension distance
+                pole_pos = [pos_mid[i] + norm_perp[i] * extend_dist for i in range(3)]
+                
+            else:  # Chain is straight, use a default offset
+                # If straight, offset along Z-axis (or another appropriate axis)
+                pole_pos = [pos_mid[0], pos_mid[1], pos_mid[2] + len_RE * 0.5]
+        else:
+            # Fallback: keep current position if chain length is zero
+            pole_pos = cmds.xform(IK_Ctrl_Pole, query=True, worldSpace=True, translation=True)
+        
+        # Apply calculated position to Pole Vector
+        cmds.xform(IK_Ctrl_Pole, worldSpace=True, translation=pole_pos)
+        cmds.setKeyframe(IK_Ctrl_Pole)
+        
+        # Clean up temp groups
+        cmds.delete(tempGroup_A)
+        
+        # 3. Switch attribute: from FK (min_val) to IK (max_val)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), min_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time - 1)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), max_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time)
+        
+        
+    elif current_state == 1:  # Switch to FK (IKFK_Seamless: FK)
+        
+        # Match FK controls to IK joints (MEL lines 530-538)
+        # Use weight=1 instead of maintainOffset to match MEL behavior
+        
+        # 1. Match FK Ctrl Root to IK Joint Root
+        con_A = cmds.parentConstraint(IK_Joint_Root, FK_Ctrl_Root, weight=1)
+        cmds.setKeyframe(FK_Ctrl_Root)
+        cmds.delete(con_A)
+
+        # 2. Match FK Ctrl Mid to IK Joint Mid
+        con_B = cmds.parentConstraint(IK_Joint_Mid, FK_Ctrl_Mid, weight=1)
+        cmds.setKeyframe(FK_Ctrl_Mid)
+        cmds.delete(con_B)
+        
+        # 3. Match FK Ctrl End to IK Joint End
+        con_C = cmds.parentConstraint(IK_Joint_End, FK_Ctrl_End, weight=1)
+        cmds.setKeyframe(FK_Ctrl_End)
+        cmds.delete(con_C)
+        
+        # 4. Switch attribute: from IK (max_val) to FK (min_val)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), max_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time - 1)
+        cmds.setAttr("{}.{}".format(switch_ctrl, switch_attr_name), min_val)
+        cmds.setKeyframe(switch_ctrl, attribute=switch_attr_name, time=current_time)
+
+    # Update optionVar
+    cmds.optionVar(intValue=(option_var_name, current_state))
+    
+    # Restore selection
+    if selection:
+        cmds.select(selection, replace=True)
+
+
+def sg_SeamlessSwitching(
+    FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, 
+    FK_Ctrl_Root, FK_Ctrl_Mid, FK_Ctrl_End,
+    IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, 
+    IK_Ctrl_Root, IK_Ctrl_Pole,
+    Switch_Ctrl, Switch_Attr
+):
+    """
+    Sets up the necessary nodes, attributes, and the scriptJob for IK/FK switching.
+    """
+    
+    # 1. Ensure all objects exist
+    all_objects = [FK_Joint_Root, FK_Joint_Mid, FK_Joint_End, FK_Ctrl_Root, FK_Ctrl_Mid, 
+                   FK_Ctrl_End, IK_Joint_Root, IK_Joint_Mid, IK_Joint_End, IK_Ctrl_Root, 
+                   IK_Ctrl_Pole, Switch_Ctrl]
+    
+    for obj in all_objects:
+        if not cmds.objExists(obj):
+            cmds.error("Object not found: '{}'. Please verify all joint and controller names.".format(obj))
+            return
+    
+    # 2. Cleanup and Create Locator
+    LOCATOR_NAME = "{}_Switch_Locator".format(Switch_Ctrl)
+    
+    matching_locators = cmds.ls(LOCATOR_NAME + "*", type='transform')
+    final_locators_to_delete = []
+    for loc in matching_locators:
+        if loc.startswith(LOCATOR_NAME) and cmds.listRelatives(loc, shapes=True, type='locator'):
+            final_locators_to_delete.append(loc)
+    
+    if final_locators_to_delete:
+        cmds.warning("Found and deleting {} existing switch locators for {}: {}".format(
+            len(final_locators_to_delete), Switch_Ctrl, final_locators_to_delete))
+        try:
+            cmds.delete(final_locators_to_delete)
+        except Exception as e:
+            cmds.warning("Failed to delete old locators: {}".format(e))
+    
+    # Recreate Locator
+    locator_shape = cmds.createNode("locator", name=LOCATOR_NAME + "Shape") 
+    locator = cmds.listRelatives(locator_shape, parent=True)[0]
+    locator = cmds.rename(locator, LOCATOR_NAME) 
+    
+    cmds.parent(locator, Switch_Ctrl)
+
+    # Unlock and clear transform attributes
+    for attr in ['tx', 'ty', 'tz', 'rx', 'ry', 'rz', 'sx', 'sy', 'sz', 'v']:
+        full_attr = "{}.{}".format(locator, attr)
+        cmds.setAttr(full_attr, lock=False)
+        connections = cmds.listConnections(full_attr, plugs=True, destination=False, source=True)
+        if connections:
+             cmds.disconnectAttr(connections[0], full_attr)
+
+    # Reset and hide Locator
+    cmds.setAttr("{}.t".format(locator), 0, 0, 0)
+    cmds.setAttr("{}.r".format(locator), 0, 0, 0)
+    cmds.setAttr("{}.s".format(locator), 1, 1, 1)
+    cmds.setAttr("{}.visibility".format(locator), 0)
+
+
+    # 3. Add IKFK_Seamless attribute to Switch Ctrl
+    if not cmds.attributeQuery("IKFK_Seamless", node=Switch_Ctrl, exists=True):
+        cmds.addAttr(Switch_Ctrl, longName="IKFK_Seamless", attributeType="enum", 
+                     enumName="IK:FK:", keyable=False)
+        cmds.setAttr("{}.IKFK_Seamless".format(Switch_Ctrl), channelBox=True)
+
+    # 4. Add config attributes to Locator and connect
+    
+    config_map = {
+        "IKFK_Seamless_Switching": LOCATOR_NAME,
+        "FK_Joint_Root": FK_Joint_Root,
+        "FK_Joint_Mid": FK_Joint_Mid,
+        "FK_Joint_End": FK_Joint_End,
+        "FK_Ctrl_Root": FK_Ctrl_Root,
+        "FK_Ctrl_Mid": FK_Ctrl_Mid,
+        "FK_Ctrl_End": FK_Ctrl_End,
+        "IK_Joint_Root": IK_Joint_Root,
+        "IK_Joint_Mid": IK_Joint_Mid,
+        "IK_Joint_End": IK_Joint_End,
+        "IK_Ctrl_Root": IK_Ctrl_Root,
+        "IK_Ctrl_Pole": IK_Ctrl_Pole,
+        "Switch_Ctrl": Switch_Ctrl,
+        "Switch_Attr": Switch_Attr,
+    }
+
+    for attr_name, value in config_map.items():
+        attr_full_name = "{}.{}".format(locator, attr_name)
+        
+        if not cmds.attributeQuery(attr_name, node=locator, exists=True):
+            cmds.addAttr(locator, longName=attr_name, dataType="string", keyable=True)
+
+        cmds.setAttr(attr_full_name, value, type="string")
+
+    # 6. Set up scriptJob (Uses the full module path)
+    # Note: Old scriptJobs will be automatically replaced when the same attribute is monitored 
+
+    # The command string for scriptJob - pure Python code
+    # Format: 'import module; module.sg_switching("locator_name")'
+    command = 'import {0}; {0}.sg_switching("{1}")'.format(MODULE_NAME, LOCATOR_NAME)
+    
+    try:
+        cmds.scriptJob(attributeChange=["{}.IKFK_Seamless".format(Switch_Ctrl), command], 
+                       killWithScene=True)
+        
+        cmds.inViewMessage(message='IK/FK Seamless Switching Built for: <hl>{}</hl>'.format(Switch_Ctrl), 
+                            position='topCenter', fade=True)
+                            
+    except Exception as e:
+        cmds.error("Failed to set up scriptJob: {}. Command was: {}".format(e, command))
+        return
+
+if __name__ == "__main__":
+    IKFK_Switch_UI()

2025/shelves/shelf_Nexus_Animation.mel

@@ -49,27 +49,27 @@ global proc shelf_Nexus_Animation () {
         -manage 1
         -visible 1
         -preventOverride 0
-        -annotation "IK/FK Switcher - Build temporary IK/FK setup on any rig" 
+        -annotation "IKFK Switch - Seamless switching between IK and FK animation" 
         -enableBackground 0
         -backgroundColor 0 0 0 
         -highlightColor 0.321569 0.521569 0.65098 
         -align "center" 
-        -label "IK/FK" 
+        -label "IKFK" 
         -labelOffset 0
         -rotation 0
         -flipX 0
         -flipY 0
         -useAlpha 1
         -font "plainLabelFont" 
-        -imageOverlayLabel "IK/FK" 
+        -imageOverlayLabel "IKFK" 
         -overlayLabelColor 0.8 0.8 0.8 
         -overlayLabelBackColor 0 0 0 0.5 
-        -image "ik_fk_switcher.png" 
-        -image1 "ik_fk_switcher.png" 
+        -image "ikfk_switch.png" 
+        -image1 "ikfk_switch.png" 
         -style "iconOnly" 
         -marginWidth 0
         -marginHeight 1
-        -command "import animation_tools.ik_fk_switcher\nanimation_tools.ik_fk_switcher.user_interface()" 
+        -command "from animation_tools import ikfk_switch\nikfk_switch.IKFK_Switch_UI()" 
         -sourceType "python" 
         -commandRepeatable 1
         -flat 1
@@ -249,5 +249,4 @@ global proc shelf_Nexus_Animation () {
         -commandRepeatable 1
         -flat 1
     ;
-
 }