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--- visual3d:documentation:modeling:functional_joints:example_-_functional_knee [2024/07/03 17:31] – removed sgranger
+++ visual3d:documentation:modeling:functional_joints:example_-_functional_knee [2025/07/30 18:55] (current) – sgranger
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+====== Example - Functional Knee ======
+When defining the functional knee joint, the calculation defines the axis of rotation, but not the location on the axis. \\
+Two additional landmarks (RKneMed & LKneMed) must be created off the position of the mediolateral knee targets. \\
+[[https://www.has-motion.com/download/FunctionalJoints.zip|Sample files]] for this tutorial may be downloaded. \\
+) This tutorial will use the **Static.c3d** and **Functional Knee.c3d** files. \\
+) The Functional Hip.c3d file is used for the [[Visual3D:Documentation:Modeling:Functional_Joints:Example_-_Functional_Hip|Functional Hip Tutorial]]. \\
+) FunctionalJoints_Hip_Knee.cmo contains a static trial with both the functional hip and knee defined. \\
+**The calculation of functional joints is described [[Visual3D:Documentation:Modeling:Functional_Joints:Functional_Joints|here]].** \\
+===== Load Static Trial =====
+|1. From the **Model** menu, select **Create -> Hybrid Model from C3D file.** \\ 2. A dialog titled **Select the calibration file for the new model** will appear; \\ Select //Static.c3d// Click **Open.** | {{:CreateStatic.jpg}}|
+===== Create Functional Joint =====
+|1. On the **Landmarks** tab: \\ 1. Select the **Functional** tab | {{:FunctionalTab.jpg}}|
+==== Create Right Functional Joint ====
+|1. On the **Landmarks** tab: \\ 1. Select the **Functional** tab \\ 2. From the **Functional Joint Name** box, select //F_RKNEE.// \\ 3. Click **Create.** | {{:Create_F_RKNEE.jpg}}|
+|2. **Select tracking targets for the F_RKNEE:** \\ **Tracking Segment/Targets** \\ Select **Use Tracking Targets** (ctrl-click to multi select) \\ //RTHI1//, //RTHI2//, //RTHI3//, //RTHI4// \\ **Other Segment/Targets:** \\ Select **Use Other Targets** (ctrl-click to multi select) \\ //RTIB1//, //RTIB2//, //RTIB3//, //RTIB4// Click on **Close Tab** before proceeding. | {{:Define_F_RKNEE.jpg}}|
+==== Create Left Functional Joint ====
+|1. On the **Landmarks** tab: \\ 1. Select the **Functional** tab \\ 2. From the **Functional Joint Name** box, select //F_LKNEE.// \\ 3. Click **Create.** | {{:Create_F_LKNEE.jpg}}|
+|2. **Select tracking targets for the F_LKNEE:** \\ **Tracking Segment/Targets** \\ Select **Use Tracking Targets** (ctrl-click to multi select) \\ //LTHI1//, //LTHI2//, //LTHI3//, //LTHI4// \\ **Other Segment/Targets:** \\ Select **Use Other Targets** (ctrl-click to multi select) \\ //LTIB1//, //LTIB2//, //LTIB3//, //LTIB4// \\ Click on **Close Tab** before proceeding. | {{:Define_F_LKNEE.jpg}}|
+===== Model Builder Advanced Post Processing =====
+|1. Select the **Post Processing** button from the menu (image below) \\ {{:ModelBuilderAdvancedPostProcessing_Button.jpg}} \\ 2. Select the **Functional Joints** tab from the dialog box (image on right) \\ |  {{:MBAPP_F_KNEE.jpg}}|
+|3. **Open functional movement file:** \\ 1. Select the **Add Motion File From Disk** \\ 2. **Browse** to functional movement file, select //Functional Knee.c3d// \\ 3. Click **Open** \\ 4. **Select** the motion file by clicking on the trial, this will highlight the trial in **blue**. \\ | {{:MBAPP_SelectMotionFile_KNEE.jpg}}|
+**NOTE:** Once the trial has been selected, the name of the trial will be highlighted and the movement file will appear in 3D viewer.
+==== Define F_RKNEE Start and End of motion ====
+|1. Select the **START** frame of the right functional movement \\ 1. **Select F_RKNEE**, this will highlight the joint in **blue** \\ 2. Using the **slider** (seen below), select the START frame of the right functional movement. //Set the Start Frame to 241// \\ {{:MBAPP_F_RKNEE_START_slider.jpg}} \\ 3. Click **Set START Event to Current Frame** \\ | {{:MBAPP_F_RKNEE_START.jpg}}|
+|2. Select the **END** frame of the right functional movement \\ 1. **Select F_RKNEE**, this will highlight the joint in **blue** \\ 2. Using the **slider** (seen below), select the END frame of the right functional movement. //Set the End Frame to 631// \\ {{:MBAPP_F_RKNEE_END_slider.jpg}} \\ 3. Click **Set END Event to Current Frame** \\ | {{:MBAPP_F_RKNEE_END.jpg}}|
+==== Define F_LKNEE Start and End of motion ====
+|1. Select the **START** frame of the left functional movement \\ 1. **Select F_LKNEE**, this will highlight the joint in **blue** \\ 2. Using the **slider**, select the START frame of the left functional movement. //Set the Start Frame to 733// \\ 3. Click **Set START Event to Current Frame** \\ | {{:MBAPP_F_LKNEE_START.jpg}}|
+|2. Select the **END** frame of the left functional movement \\ 1. **Select F_LKNEE**, this will highlight the joint in **blue** \\ 2. Using the **slider**, select the END frame of the left functional movement. //Set the End Frame to 1149// \\ 3. Click **Set END Event to Current Frame** \\ | {{:MBAPP_F_LKNEE_END.jpg}}|
+===== Compute Landmarks =====
+|1. Select **Compute ALL Landmarks** \\ 2. **Close** the Model Builder Advanced Post Processing dialog box \\ 3. Four landmarks (**F_RKNEE, F_RKNEE_X, F_LKNEE and F_LKNEE_X**) should appear in purple in the 3D viewer \\ **If the landmarks do NOT appear in the 3D viewer, check:** \\ - That the landmarks are turned on (3D View Options) \\ - Check that all steps in this tutorial were completed \\   |  {{:F_RKNEE_F_LKNEE.jpg}}|
+===== Compute Right Mediolateral Borders of the Knee Joint Center =====
+The RKneLat and RKneMed landmarks created below will be used to define the mediolateral borders of the knee joint.
+These landmarks will project the mediolateral targets (RLATKNE,RMEDKNE) onto the axis of rotation created by the functional joint (F_RKNEE,F_RKNEE_X).
+|**1. Create Lateral Border of the Right Knee Joint Center (RKneLat):** \\ Click **Landmarks** button \\ Click **Add New Landmark** button \\ Create Landmark: //RKneLat// \\ **Landmark Name:** //RKneLat// \\ **Define Orientation Using:** \\ **Starting Point:** //F_RKNEE// \\ **Ending Point:** //F_RKNEE_X// \\ **Project From:** //RLATKNE// \\ **Do NOT Check:** //Offset by Percent (1.0 = 100%)// \\ //Calibration Only Landmark// | {{:RKneLat.jpg}}|
+|**2. Create Medial Border of the Right Knee Joint Center (RKneMed):** \\ Click **Landmarks** button \\ **Add New Landmark** button \\ Create Landmark: \\ **Landmark Name:** //RKneMed// \\ **Define Orientation Using:** \\ **Starting Point:** //F_RKNEE// \\ **Ending Point:** //F_RKNEE_X// \\ **Project From:** //RMEDKNE// \\ **Do NOT Check:** //Offset by Percent (1.0 = 100%)// \\ **Do NOT Check:** //Calibration Only Landmark// | {{:RKneMed.jpg}}|
+===== Compute Left Mediolateral Borders of the Knee Joint Center =====
+The LKneLat and LKneMed landmarks created below will be used to define the mediolateral borders of the knee joint.
+These landmarks will project the mediolateral targets (LLATKNE,LMEDKNE) onto the axis of rotation created by the functional joint (F_LKNEE,F_LKNEE_X).
+|**1. Create Lateral Border of the Left Knee Joint Center (LKneLat):** \\ Click **Landmarks** button \\ Click **Add New Landmark** button \\ Create Landmark: //LKneLat// \\ **Landmark Name:** //LKneLat// \\ **Define Orientation Using:** \\ **Starting Point:** //F_LKNEE// \\ **Ending Point:** //F_LKNEE_X// \\ **Project From:** //LLATKNE// \\ **Do NOT Check:** //Offset by Percent (1.0 = 100%)// \\ **Do NOT Check:** //Calibration Only Landmark// |{{:LKneLat.jpg}}|
+|**2. Create Medial Border of the Left Knee Joint Center (LKneMed):** \\ Click **Landmarks** button \\ Click **Add New Landmark** button \\ Create Landmark: //LKneMed// \\ **Landmark Name:** //LKneMed// \\ **Define Orientation Using:** \\ **Starting Point:** //F_LKNEE// \\ **Ending Point:** //F_LKNEE_X// \\ **Project From:** //LMEDKNE// \\ **Do NOT Check:** //Offset by Percent (1.0 = 100%)// \\ **Do NOT Check:** //Calibration Only Landmark// | {{:LKneMed.jpg}}|