Motion Builder 教學

希望以每週最少一部錄制教學，完成MotionBuilder教學。
以下內容是以前設定過的課程大綱，會依錄製情況做調整。

• Lesson 1 :介面認識

Viewer control 視窗操控+快速鍵使用

• T移動 R旋轉 S縮放
• Shift+Left Click 平移畫面
• Ctrl+Shift Left Click 旋轉畫面
• Ctrl+Left Click 縮放畫面
• Ctrl+a 物件置中
• Ctrl+1~4 切面視窗面版
• Ctrl+W 樹枝圖
• Ctrl+E 透視攝影機
• Ctrl+F 前視/後視
• Ctrl+R 右視/左視
• Ctrl+T 上視/下視
• Alt+z/y 回復視窗操作

Preferences參數設定 saving/selective redraw/undo/Viewer

Asset browser

Navigator window

Layouts 自定面版

Transport Controls

• Lesson 2 :Characterize角色綁定
  • T-Pose( hand )
  • T-Pose( feet )
  • Definetion - Charater Controls
  • Definetion - Navigator
  • Definetion - toe/ toe base
  • Definetion - Reference
  • Definetion - Floor Contact

• Lesson 3 : Advanced Characterize 進階角色綁定
• Degrees of freedom ( DOF )
• DOF 完整說明
• Characters extension
• Create Auxiliary/effectors objects
• NameSpace
• Handles
• Constraints 的使用
• parent/Child constraint
• 3 Points constraint
• Aim constraint
• Position constraint
• rotation constraint
• relations constraints
• Relation

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Damping operator

new scene

create a cube

copies 5 (ctrl+c then ctrl+v 5 times)

ctrl+w

p (parent mode)

add 10 damping operator

Other>Damping(3D)

damping effecter

Number>integer

click all damping factor connect to integer

drag all cube into relation constrain

• Lesson 4 : Character Controls 動作入門
• 控制器 Skeleton / IK/ FK 如何使用
• Key Mode
• Pin 圖釘功能

• Lesson 5: 動作進階 mocap clean 
• Filters的運用 key reducing/ peak Removal/ smooth/ smooth Translation
• FCurves的運用 layer/ Time Warp (Ghost) (Tangent)
• Key controls
• pose的運用 copy/past pose
• Motion Trajectories
• time and timelines 的運用 takes mark/loop
• motion blend window
• story
• Mirror
• In place

• Lesson 6: re-target
• Lesson 7:Setup an Actor

Add Favorite path in Asset Browser

Open 2_1_Opt_Data.fbx from Asset Browser

Create an Actor from Asset Browser

Align Actor to Markers

縮放Actro Body對齊肩膀高度

調整手臂的角度

調整腿的角度

• Create a Marker set
• 頭部
• 胸部
• 腹部
• 膝蓋
• 腳掌
• 肩膀
• 手肘
• 手掌

• Rigid Bodies
• 頭部
• 胸部
• 腹部
• 大腿
• 腳掌
• 上手臂
• 手掌

Optical_Correction

Eliminating Noise

frame 255

select RSHO 5

Zoom in to see peaks in the optical data.

M-drag the Split line

Select Auto-Bezier

Eliminating Occlusion

frame 296

Eliminating Swapping

Frame427

Finalizing Optical Data

Save file as : ActorMove

• Lesson 7 :Mapping Actor to a Character

• 環境設定 
• Preferences / selective Redraw
• Layouts 進階設定
• cameras 設定 camera Settings/ add new Camera/ Camera Switcher
• Lights 設定
• Shaders 設定
• Surfaces 設定

HumanIK - setup tip : Degrees of Freedom

     Setup Degrees of Freedom before you apply Human IK onto your rig!

     HumanIK system is come from Montion Builder. It usually use in motion capture. Today, I want to talk about Degrees of Freedom. As an animator, if you had a chance to use HIK, and also pay attention to the rotation of elbow, knee, ect... It is obviously to found out the elbow control has three rotation value which annoyed animators a lot.

     To avoid this problem. In Maya, select the elbow/knee joints, then start check out the option on Attribute/ Limit Information/ Rotate.

In moition builder, go to properties panel. switch the filter to All(type). the Degrees of Freedom should be listed on the panel.

Notice! This setting could only apply on skeleton not HIK.

Let's take a look curves on this picture

Left side with red circle shows the result without DOF.
Right side with yellow circle shows the result with DOF.
The biggest different is Forearm FK controller.


I will discuss T-Pose next time.
========================== 中文版 ==================================
     在套用Human IK到骨骼之前， 先設定Degrees of Freedom!
 
     HumanIK是來自Montion Builder的控制器系統，最常被運用的地方應該就是motion capture。今天為什麼我講講Degrees of Freedom，身為一個動畫師，如果你有用過HumanIK，是有過什麼手肘、膝蓋等關節處，旋轉值不會只有一個，而是x、y、z都有。正常用IK Solver不會有這種問題，設定FK時也會限制旋轉軸向，而這些動作也是可以在HumanIK上設定的，但卻一直沒人去重視這個部分，實在很讓人頭痛。

避免這個問題，一開始在設定骨骼時，在maya裡只要針對手肘、跟膝蓋去勾選Attribute/ Limit Information/ Rotate下的最小跟最大值，就可以減少動畫師在調整手肘跟膝蓋時的麻煩。

而在motion builder 裡則是稱作Degrees of Freedom(DOF)，在Properties裡先將顯示改成All(Type)就可以看到Degrees of Freedom的項目

只要在骨骼上設定好，HIK基本上就會依照骨骼的限制產生對的值，也就只會有一個旋軸的值。如果不做這個設定，當mocap的動作一套用上去，那HIK就會很"自由"的調動3個旋轉軸向。

看一下這張範列圖的曲線

右邊有紅圈的沒設置DOF
左邊有黃圈的是有設置DOF
最大的差別在前手臂的FK曲線


下次再談談T-Pose