======IOR Gait Shoulder Orientation and Translation======

=====Overview=====
This tutorial is a continuation of the [[visual3d:tutorials:modeling:ior_gait_full_body_model|IOR Gait Full Body Tutorial]]. This tutorial goes through computing the orientation and the translation of the shoulder targets relative to the trunk segment.

===== Shoulder LB =====
Below defines the orientation of the line between the shoulder targets (LCAJ/RCAJ) relative to the trunk segment
==== Shoulder LB & AR Landmarks ====
{{ :iorfb_rta_or.png?300}}
**1. Create RTA_OR:**
  - Click **Landmarks** button
  - Click **Add New Landmark** button
  - Create Landmark: RTA_OR
    * **Landmark Name:** RTA_OR
    * **Existing Segment:** Thorax/Ab
  -Offset Using the Following **ML/AP/AXIAL** Offsets:
    * **X:** 0.0 **Y:** 0.0 **Z:** 0.0
  - **Check:** Offset by Percent (1.0 = 100%) (Meters when not checked)
  - **Do NOT Check:** Calibration Only Landmark (Not generated for assigned motion file(s))

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{{ :iorfb_rta_ml.png?300}}
**2. Create RTA_ML:**
  - Click **Landmarks** button
  - Click **Add New Landmark** button
  - Create Landmark: RTA_ML
    * **Landmark Name:** RTA_ML
    * **Existing Segment:** THORAX/Ab
  - Offset Using the Following **ML/AP/AXIAL** Offsets:
    * **X:** 0.5 **Y:** 0.0 **Z:** 0.0
  - **Check:** Offset by Percent (1.0 = 100%) (Meters when not checked)
  - **Do NOT Check:** Calibration Only Landmark (Not generated for assigned motion file(s))

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==== Shoulder LB & AR Definitions ====
{{ :iorfb_rsh_th_lb.png?300}}
**3. Create RSh_Th_LB planar angle:**
  - Define **Resulting Signal** Name: RSh_Th_LB
  - Calculate a **4 point angle** between the following targets:
    - LANDMARK::ORIGINAL::RTA_ML
    - LANDMARK::ORIGINAL::RTA_OR
    - TARGET::PROCESSED::LCAJ
    - TARGET::PROCESSED::RCAJ
    * **Angle Direction:** Left Hand Rule
    * **3D Space:** Always 0 to 180 degrees
    * **Projected onto Plan:** YZ
    * **NOTE: The reference segment will need to be changed to RTA within the text options.**

**4. Create LSh_Th_LB planar angle:**
  * When defining the left signal, use same definitions **except** set:
    * **Angle Direction:** Right Hand Rule

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{{ :iorfb_rsh_th_ar.png?300}}
**5. Create RSh_Th_AR planar angle:**
  - Define **Resulting Signal** Name: RSh_Th_AR
  - Calculate a **4 point angle** between the following targets:
    - TARGET::PROCESSED::RCAJ
    - TARGET::PROCESSED::LCAJ
    - LANDMARK::ORIGINAL::RTA_OR
    - LANDMARK::ORIGINAL::RTA_ML
    * **Angle Direction:** Left Hand Rule
    * **3D Space:** Always 0 to 180 degrees
    * **Projected onto Plane:** XZ
    * **Note: The reference segment will need to be changed to RTA within the text option**

**6. Create LSh_Th_AR planar angle:**
  * When defining the left signal, use same definitions **except** set:
    * **Angle Direction:** Right Hand Rule

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===== Translation ======
Below defines the translation of the shoulder targets (LCAJ/RCAJ) in the trunk coordinate system
==== Shoulder Translation Definitions ====
{{ :IORFull RA Tho Transl.png?300}}
**7. Define RA_Tho_Transl:**
  - Open the **Compute Model Based** dialog
  - Select **TARGET_PATH** from drop down list
    * **Date Name:** RA_Tho_Transl
    * **Target:** RCAJ
    * **Reference Segment:** Thorax/Ab
    * **Resolution Coordinate System:** Thorax/Ab
**8. Define LA_Tho_Transl:**
  * When defining the left signal, use the same definitions **except** set:
    * **Target:** LCAJ