AIGC笔记--Maya提取和修改FBX动作文件

目录

1--Maya数据解析

2--FBX SDK导出6D数据

3--6D数据映射和Maya可视化

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完整项目代码：Data-Processing/FBX_SDK_Maya

1--Maya数据解析

在软件Maya中直接拖入FBX文件，可以播放和查看人体各个骨骼关节点的数据：

        对于上图来说，平移X、平移Y和平移Z表示关节点的Local Transaction的坐标，而旋转X、旋转Y、旋转Z表示关节点的Euler Rotation坐标；对于一个固定的人体模型，修改每一帧中各个关节点的上述六个坐标，即可改变人体表现的动作；

        在Maya中，可以通过以下脚本在Python编辑器（窗口→常规编辑器→脚本编辑器）中打印所有帧所有关节的上述6D坐标数据：

'''
@File    :   print_joint_6Ddata_maya.py
@Time    :   2024/03/07 20:05:00
@Author  :   Jinfu Liu
@Version :   1.0 
@Desc    :   print 6D data of joint in FBX file
'''import maya.cmds as cmdsjoint_names = ["root", "pelvis", "spine_00", "spine_01", "spine_02", "spine_03", "clavicle_l", "upperarm_l", "lowerarm_l", "hand_l", "index_01_l","index_02_l", "index_03_l", "middle_01_l", "middle_02_l", "middle_03_l", "pinky_01_l", "pinky_02_l", "pinky_03_l", "ring_01_l", "ring_02_l","ring_03_l", "thumb_01_l", "thumb_02_l", "thumb_03_l", "Slot_hand_L_bone", "clavicle_r", "upperarm_r", "lowerarm_r", "hand_r", "index_01_r","index_02_r", "index_03_r", "middle_01_r", "middle_02_r", "middle_03_r", "pinky_01_r", "pinky_02_r", "pinky_03_r", "ring_01_r", "ring_02_r","ring_03_r", "thumb_01_r", "thumb_02_r", "thumb_03_r", "Slot_hand_R_bone", "Slot_spine_bone", "neck_01", "head", "thigh_l", "calf_l","foot_l", "ball_l", "thigh_r", "calf_r", "foot_r", "ball_r", "Slot_waist_L_bone", "Slot_waist_R_bone", "Slot_pelvis_bone", "ik_foot_root", "ik_foot_l","ik_foot_r", "ik_hand_root", "ik_hand_gun", "ik_hand_l", "ik_hand_r"]for joint in joint_names:obj = cmds.ls(joint)print("process ", obj)keyframes = cmds.keyframe(obj, query=True)for frame in keyframes:local_trans_X = cmds.getAttr(joint + ".translateX", time = frame)local_trans_Y = cmds.getAttr(joint + ".translateY", time = frame)local_trans_Z = cmds.getAttr(joint + ".translateZ", time = frame)local_rotate_X = cmds.getAttr(joint + ".rotateX", time = frame)local_rotate_Y = cmds.getAttr(joint + ".rotateY", time = frame)local_rotate_Z = cmds.getAttr(joint + ".rotateZ", time = frame)print(local_trans_X, local_trans_Y, local_trans_Z)print(local_rotate_X, local_rotate_Y, local_rotate_Z)

2--FBX SDK导出6D数据

通过Python FBX SDK，我们可以提取和保存在一个原始FBX文件中对应于Maya可视化的6D坐标，具体的脚本如下：FBX_SDK_Maya/Extract_local_TR.py

3--6D数据映射和Maya可视化

        通过第2步的脚本可以提取人体运动的关键6D坐标数据，这些6D坐标数据可以进行一些动作生成任务，生成相同意义的坐标数据。原始6D或生成的6D坐标数据可以使用以下脚本，并在Maya中进行可视化：

'''
@File    :   set_joint_6Ddata_maya.py
@Time    :   2024/03/07 20:10:00
@Author  :   Jinfu Liu
@Version :   1.0 
@Desc    :   set 6D data of joint in FBX file
'''# you must install numpy by: mayapy.exe -m pip install numpy
import numpy as np
import maya.cmds as cmdsJoint_to_idx = {"root": 0,"pelvis": 1,"spine_00": 2,"spine_01": 3,"spine_02": 4,"spine_03": 5,"clavicle_l": 6,"upperarm_l": 7,"lowerarm_l": 8,"hand_l": 9,"index_01_l": 10,"index_02_l": 11,"index_03_l": 12,"middle_01_l": 13,"middle_02_l": 14,"middle_03_l": 15,"pinky_01_l": 16,"pinky_02_l": 17,"pinky_03_l": 18,"ring_01_l": 19,"ring_02_l": 20,"ring_03_l": 21,"thumb_01_l": 22,"thumb_02_l": 23,"thumb_03_l": 24,"Slot_hand_L_bone": 25,"clavicle_r": 26,"upperarm_r": 27,"lowerarm_r": 28,"hand_r": 29,"index_01_r": 30,"index_02_r": 31,"index_03_r": 32,"middle_01_r": 33,"middle_02_r": 34,"middle_03_r": 35,"pinky_01_r": 36,"pinky_02_r": 37,"pinky_03_r": 38,"ring_01_r": 39,"ring_02_r": 40,"ring_03_r": 41,"thumb_01_r": 42,"thumb_02_r": 43,"thumb_03_r": 44,"Slot_hand_R_bone": 45,"Slot_spine_bone": 46,"neck_01": 47,"head": 48,"thigh_l": 49,"calf_l": 50,"foot_l": 51,"ball_l": 52,"thigh_r": 53,"calf_r": 54,"foot_r": 55,"ball_r": 56,"Slot_waist_L_bone": 57,"Slot_waist_R_bone": 58,"Slot_pelvis_bone": 59,"ik_foot_root": 60,"ik_foot_l": 61,"ik_foot_r": 62,"ik_hand_root": 63,"ik_hand_gun": 64,"ik_hand_l": 65,"ik_hand_r": 66
}Local_Trans_data = np.load("C:/Users/jinfullliu/Desktop/test_maya/Local_Trans.npy", allow_pickle = True)
local_Rotate_data = np.load("C:/Users/jinfullliu/Desktop/test_maya/local_Rotate.npy", allow_pickle = True)for joint in Joint_to_idx:joint_idx = Joint_to_idx[joint]obj = cmds.ls(joint)print("process ", obj)for frame in range(Local_Trans_data.shape[0]):cmds.setKeyframe(joint + '.translateX', value = Local_Trans_data[frame, joint_idx, 0], time=frame)cmds.setKeyframe(joint + '.translateY', value = Local_Trans_data[frame, joint_idx, 1], time=frame)cmds.setKeyframe(joint + '.translateZ', value = Local_Trans_data[frame, joint_idx, 2], time=frame)cmds.setKeyframe(joint + '.rotateX', value = local_Rotate_data[frame, joint_idx, 0], time=frame)cmds.setKeyframe(joint + '.rotateY', value = local_Rotate_data[frame, joint_idx, 1], time=frame)cmds.setKeyframe(joint + '.rotateZ', value = local_Rotate_data[frame, joint_idx, 2], time=frame)