├── README.md ├── Blender-OptimizedPoseGeneratorForUEMLDeformer.py └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | # Blender-to-UE-ML-Deformer-Plugin-Random-Pose-Generator 2 | This script will generate random poses for Bone/Joints you specify for use as a base for Unreal Engine Machine Learning Training to fix your Characters Mesh Deformations when Animated. 3 | 4 | IMPORTANT: Due to Unreal Engine weirdness, the .FBX and the .ABC CANNOT have the same exact name. model.fbx and model.abc will Not work. model.fbx and modelx.abc will. 5 | 6 | Update the Joint dictionary and the Armature Name (currently root), to match your needs. Also, update the joint limits as you see fit. 7 | Epic documentation suggests 20,000 to 50,000 random poses. That will create HUGE files in the end. in the multiple Gigabyte range. 8 | I suggest testing with fewer poses, perhaps 100, before investing those resources. 9 | 10 | once Poses are keyframed, export your FBX to go to UE. Also, Export an Alembic of the same(as what you put in the FBX) 11 | Then, follow the Epic/Unreal Documentation found here. https://docs.unrealengine.com/5.1/en-US/how-to-use-the-machine-learning-deformer-in-unreal-engine/ 12 | 13 | During your testing phase, determine if you should import the Alembic starting at frame 1 or 0. I suggest 1. 14 | Also, when importing your FBX, use the Exported Time as the animation length setting. 15 | 16 | Don't forget to tune the joint limits to your skeleton 17 | 18 | NOTE!: There seems to some confusion as to how the ML Deformation Corrective system in UE actually functions.. This script generates the poses required by the ML Deform system to learn from, but you have to actually supply it with a difference in the mesh to learn. For example, Epic built an extremely realistic muscle simulation system that became the Alembic Geometry Cache to train the simpler Skinned Skeletal Mesh that is the character in their example project on the subject. So, short of building a complex muscle simulation system, the fastest way to get results would be to use Blenders built in Corrective Smooth modifier on your mesh. So, you would have your Character already in Unreal. you would then use the same Skeletal Mesh in Blender to make a series of poses on. You could enable the Smooth Corrective Modifier on your character mesh, and be done. you then Export the Animation as both the regular mesh, and as an Alembic Cache. So, when you go back in to UE, you would have the Poses Animation work on your Character Skeletal Mesh. You would also Import the Alembic Geometry Cache that has the Corrective Smooth Modifier corrections already in effect. The ML Deformer Training would then take your Character Mesh and the Alembic Cache and apply those changes between your Base Character Mesh and the Alembic Cache, which has the results of the Corrective Smooth Modifier from Blender, as a series of morph targets that are all automatically handled by the ML Deformer system. The end product being your simpler Character Mesh will gain the corrections of whatever complex system you used to correct deformation in Blender. In this example, we've used the Smooth Corrective Modifier, which does make a significant difference. We could have built a more complex rig to perhaps simulate muscles, or maybe something as simple as an armpit bone that we use a Driver to move up as the shoulder raises. This bone would exist only on this Character Mesh to assist in deformation corrections while in Blender. These corrections would carry over in the Alembic Cache while having the base poses animation still match the Character Mesh already in Blender. 19 | -------------------------------------------------------------------------------- /Blender-OptimizedPoseGeneratorForUEMLDeformer.py: -------------------------------------------------------------------------------- 1 | 2 | #Code by Hunanbean and ChatGPT4 3 | #GPL3 applies to the Script itself, NOT to the output 4 | 5 | 6 | import bpy 7 | import random 8 | from math import radians 9 | 10 | def set_random_pose(pose_bone, limits): 11 | pose_bone.rotation_mode = 'XYZ' 12 | 13 | random_rotations = { 14 | axis: random.uniform(radians(limit[0]), radians(limit[1])) for axis, limit in limits.items() 15 | } 16 | 17 | pose_bone.rotation_euler = ( 18 | random_rotations['x'], 19 | random_rotations['y'], 20 | random_rotations['z'], 21 | ) 22 | 23 | def keyframe_pose(joint_name, limits, frame): 24 | ob = bpy.data.objects['root'] 25 | pose_bone = ob.pose.bones[joint_name] 26 | 27 | for axis in 'xyz': 28 | pose_bone.keyframe_insert( 29 | data_path='rotation_euler', 30 | frame=frame, 31 | index='xyz'.index(axis), 32 | ) 33 | 34 | # Set the number of frames you want to keyframe 35 | num_frames = 100 36 | 37 | # Specify the joints you want to manipulate and their rotation limits (in degrees) 38 | joint_list = { 39 | 'thigh_l': {'x': (-35, 90), 'y': (-40, 45), 'z': (-90, 35)}, 40 | 'thigh_r': {'x': (35, -90), 'y': (40, -45), 'z': (-90, 35)}, 41 | 'spine_01': {'x': (-25, 25), 'y': (-20, 20), 'z': (-25, 95)}, 42 | 'spine_01.5': {'x': (-25, 25), 'y': (-20, 20), 'z': (-25, 25)}, 43 | 'spine_02': {'x': (-25, 25), 'y': (-20, 20), 'z': (-25, 25)}, 44 | 'spine_03': {'x': (-25, 25), 'y': (20, -20), 'z': (-25, 25)}, 45 | 'clavicle_l': {'x': (0, 0), 'y': (15, -45), 'z': (-25, 45)}, 46 | 'clavicle_r': {'x': (0, 0), 'y': (45, -15), 'z': (-45, 25)}, 47 | 'upperarm_l': {'x': (-60, 165), 'y': (10, -5), 'z': (60, -145)}, 48 | 'upperarm_r': {'x': (-165, 60), 'y': (-10, 5), 'z': (-145, 60)}, 49 | 'hand_l': {'x': (-40, 60), 'y': (-45, 45), 'z': (-90, 90)}, 50 | 'hand_r': {'x': (-60, 40), 'y': (45, -45), 'z': (90,-90)}, 51 | 'lowerarm_l': {'x': (-90, 30), 'y': (-30, 15), 'z': (-90, 50)}, 52 | 'lowerarm_r': {'x': (-30, 90), 'y': (-15, 30), 'z': (-90, 50)}, 53 | 'neck_01': {'x': (-45, 45), 'y': (-65, 65), 'z': (-40, 55)}, 54 | 'head': {'x': (-35, 20), 'y': (-55, 55), 'z': (-30, 30)}, 55 | 'calf_l': {'x': (30, 0), 'y': (-12, 12), 'z': (-45, 0)}, 56 | 'calf_r': {'x': (-30, 0), 'y': (-12, 12), 'z': (-45, 0)}, 57 | 'foot_l': {'x': (-45, 45), 'y': (-15, 45), 'z': (-60, 20)}, 58 | 'foot_r': {'x': (-45, 45), 'y': (-15, 45), 'z': (-20, 60)}, 59 | 'ball_l': {'x': (-60, 20), 'y': (-10, 10), 'z': (-10, 10)}, 60 | 'ball_r': {'x': (-60, 20), 'y': (-10, 10), 'z': (-10, 10)}, 61 | } 62 | 63 | # Select the armature object and set it as active 64 | ob = bpy.data.objects['root'] 65 | bpy.context.view_layer.objects.active = ob 66 | 67 | # Keyframe the rest pose at frame 1 68 | bpy.ops.object.mode_set(mode='POSE') 69 | for joint_name in joint_list: 70 | keyframe_pose(joint_name, joint_list[joint_name], 1) 71 | bpy.ops.object.mode_set(mode='OBJECT') 72 | 73 | # Start randomization at frame 2 74 | bpy.ops.object.mode_set(mode='POSE') 75 | for frame in range(2, num_frames + 1): 76 | for joint_name, limits in joint_list.items(): 77 | set_random_pose(ob.pose.bones[joint_name], limits) 78 | keyframe_pose(joint_name, limits, frame) 79 | bpy.ops.object.mode_set(mode='OBJECT') 80 | 81 | print("Keyframed rest pose at frame 1 and random poses for selected joints.") 82 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | 2 | ------------------------------------------------------------------------------------- 3 | --=* This license applies to the Script itself. 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To "grant" such a patent license to a 504 | party means to make such an agreement or commitment not to enforce a 505 | patent against the party. 506 | 507 | If you convey a covered work, knowingly relying on a patent license, 508 | and the Corresponding Source of the work is not available for anyone 509 | to copy, free of charge and under the terms of this License, through a 510 | publicly available network server or other readily accessible means, 511 | then you must either (1) cause the Corresponding Source to be so 512 | available, or (2) arrange to deprive yourself of the benefit of the 513 | patent license for this particular work, or (3) arrange, in a manner 514 | consistent with the requirements of this License, to extend the patent 515 | license to downstream recipients. "Knowingly relying" means you have 516 | actual knowledge that, but for the patent license, your conveying the 517 | covered work in a country, or your recipient's use of the covered work 518 | in a country, would infringe one or more identifiable patents in that 519 | country that you have reason to believe are valid. 520 | 521 | If, pursuant to or in connection with a single transaction or 522 | arrangement, you convey, or propagate by procuring conveyance of, a 523 | covered work, and grant a patent license to some of the parties 524 | receiving the covered work authorizing them to use, propagate, modify 525 | or convey a specific copy of the covered work, then the patent license 526 | you grant is automatically extended to all recipients of the covered 527 | work and works based on it. 528 | 529 | A patent license is "discriminatory" if it does not include within 530 | the scope of its coverage, prohibits the exercise of, or is 531 | conditioned on the non-exercise of one or more of the rights that are 532 | specifically granted under this License. You may not convey a covered 533 | work if you are a party to an arrangement with a third party that is 534 | in the business of distributing software, under which you make payment 535 | to the third party based on the extent of your activity of conveying 536 | the work, and under which the third party grants, to any of the 537 | parties who would receive the covered work from you, a discriminatory 538 | patent license (a) in connection with copies of the covered work 539 | conveyed by you (or copies made from those copies), or (b) primarily 540 | for and in connection with specific products or compilations that 541 | contain the covered work, unless you entered into that arrangement, 542 | or that patent license was granted, prior to 28 March 2007. 543 | 544 | Nothing in this License shall be construed as excluding or limiting 545 | any implied license or other defenses to infringement that may 546 | otherwise be available to you under applicable patent law. 547 | 548 | 12. No Surrender of Others' Freedom. 549 | 550 | If conditions are imposed on you (whether by court order, agreement or 551 | otherwise) that contradict the conditions of this License, they do not 552 | excuse you from the conditions of this License. If you cannot convey a 553 | covered work so as to satisfy simultaneously your obligations under this 554 | License and any other pertinent obligations, then as a consequence you may 555 | not convey it at all. For example, if you agree to terms that obligate you 556 | to collect a royalty for further conveying from those to whom you convey 557 | the Program, the only way you could satisfy both those terms and this 558 | License would be to refrain entirely from conveying the Program. 559 | 560 | 13. Use with the GNU Affero General Public License. 561 | 562 | Notwithstanding any other provision of this License, you have 563 | permission to link or combine any covered work with a work licensed 564 | under version 3 of the GNU Affero General Public License into a single 565 | combined work, and to convey the resulting work. The terms of this 566 | License will continue to apply to the part which is the covered work, 567 | but the special requirements of the GNU Affero General Public License, 568 | section 13, concerning interaction through a network will apply to the 569 | combination as such. 570 | 571 | 14. Revised Versions of this License. 572 | 573 | The Free Software Foundation may publish revised and/or new versions of 574 | the GNU General Public License from time to time. Such new versions will 575 | be similar in spirit to the present version, but may differ in detail to 576 | address new problems or concerns. 577 | 578 | Each version is given a distinguishing version number. If the 579 | Program specifies that a certain numbered version of the GNU General 580 | Public License "or any later version" applies to it, you have the 581 | option of following the terms and conditions either of that numbered 582 | version or of any later version published by the Free Software 583 | Foundation. If the Program does not specify a version number of the 584 | GNU General Public License, you may choose any version ever published 585 | by the Free Software Foundation. 586 | 587 | If the Program specifies that a proxy can decide which future 588 | versions of the GNU General Public License can be used, that proxy's 589 | public statement of acceptance of a version permanently authorizes you 590 | to choose that version for the Program. 591 | 592 | Later license versions may give you additional or different 593 | permissions. However, no additional obligations are imposed on any 594 | author or copyright holder as a result of your choosing to follow a 595 | later version. 596 | 597 | 15. Disclaimer of Warranty. 598 | 599 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 600 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 601 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 602 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 603 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 604 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 605 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 606 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 607 | 608 | 16. Limitation of Liability. 609 | 610 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 611 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 612 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 613 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 614 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 615 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 616 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 617 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 618 | SUCH DAMAGES. 619 | 620 | 17. Interpretation of Sections 15 and 16. 621 | 622 | If the disclaimer of warranty and limitation of liability provided 623 | above cannot be given local legal effect according to their terms, 624 | reviewing courts shall apply local law that most closely approximates 625 | an absolute waiver of all civil liability in connection with the 626 | Program, unless a warranty or assumption of liability accompanies a 627 | copy of the Program in return for a fee. 628 | 629 | END OF TERMS AND CONDITIONS 630 | 631 | How to Apply These Terms to Your New Programs 632 | 633 | If you develop a new program, and you want it to be of the greatest 634 | possible use to the public, the best way to achieve this is to make it 635 | free software which everyone can redistribute and change under these terms. 636 | 637 | To do so, attach the following notices to the program. It is safest 638 | to attach them to the start of each source file to most effectively 639 | state the exclusion of warranty; and each file should have at least 640 | the "copyright" line and a pointer to where the full notice is found. 641 | 642 | 643 | Copyright (C) 644 | 645 | This program is free software: you can redistribute it and/or modify 646 | it under the terms of the GNU General Public License as published by 647 | the Free Software Foundation, either version 3 of the License, or 648 | (at your option) any later version. 649 | 650 | This program is distributed in the hope that it will be useful, 651 | but WITHOUT ANY WARRANTY; without even the implied warranty of 652 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 653 | GNU General Public License for more details. 654 | 655 | You should have received a copy of the GNU General Public License 656 | along with this program. If not, see . 657 | 658 | Also add information on how to contact you by electronic and paper mail. 659 | 660 | If the program does terminal interaction, make it output a short 661 | notice like this when it starts in an interactive mode: 662 | 663 | Copyright (C) 664 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 665 | This is free software, and you are welcome to redistribute it 666 | under certain conditions; type `show c' for details. 667 | 668 | The hypothetical commands `show w' and `show c' should show the appropriate 669 | parts of the General Public License. Of course, your program's commands 670 | might be different; for a GUI interface, you would use an "about box". 671 | 672 | You should also get your employer (if you work as a programmer) or school, 673 | if any, to sign a "copyright disclaimer" for the program, if necessary. 674 | For more information on this, and how to apply and follow the GNU GPL, see 675 | . 676 | 677 | The GNU General Public License does not permit incorporating your program 678 | into proprietary programs. If your program is a subroutine library, you 679 | may consider it more useful to permit linking proprietary applications with 680 | the library. If this is what you want to do, use the GNU Lesser General 681 | Public License instead of this License. But first, please read 682 | . 683 | --------------------------------------------------------------------------------