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--- visual3d:documentation:modeling:virtual_lab:creating_a_virtual_laboratory [2024/07/17 15:42] – removed sgranger
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+====== Creating a Virtual Laboratory ======
+A Virtual Laboratory is not a physical segment in Visual3D but is equivalent to a physical segment to the effect that it has a **Segment Coordinate System** that can be used to represent the laboratory (or other objects) and has an associated **surface model** that can be animated as part of the scene. A typical use of the Virtual Laboratory is to represent the floor so that motion capture markers can be projected onto the floor. This can be used for creating [[Visual3D:Documentation:Pipeline:Model_Based_Data_Commands:Joint_Angle#Joint_Angle_Normalization|Normalized Joint Angles]].
+For more information please view the [[Visual3D:Tutorials:Modeling:Virtual_Laboratory_|Virtual Lab Tutorial]].
+=== Create Landmarks ===
+To create the Virtual Lab segment first create 4 Landmarks: **LAB_Origin**, **LAB_X**, **LAB_Y**, and **LAB_Z**.
+To create **Lab_Origin** landmark, enter the following into the landmark Tab:
+Landmark Name=**Lab_Origin**
+Starting Point= leave blank
+Existing Segment= **LAB**
+Offset Using the Following ML/AP/AXIAL Offset ML=**0** , AP=**0** , AXIAL=**0**
+Calibration Only Landmark=**Leave Unchecked**
+To create **Lab_X** landmark, enter the following into the landmark Tab:
+Landmark Name=**Lab_X**
+Starting Point=leave blank
+Existing Segment=**LAB**
+Offset Using the Following ML/AP/AXIAL Offset ML=**0.1** , AP=**0** , AXIAL=**0**
+Calibration Only Landmark=**Leave Unchecked**
+To create **Lab_Y** landmark, enter the following into the landmark Tab:
+Landmark Name=**Lab_Y**
+Starting Point=leave blank
+Existing Segment=**LAB**
+Offset Using the Following ML/AP/AXIAL Offset ML=**0** , AP=**0.1** , AXIAL=**0**
+Calibration Only Landmark=**Leave Unchecked**
+To create **Lab_Z** landmark, enter the following into the landmark Tab:
+Landmark Name=**Lab_Z**
+Starting Point=leave blank
+Existing Segment=**LAB**
+Offset Using the Following ML/AP/AXIAL Offset ML=**0** , AP=**0** , AXIAL=**0.1**
+Calibration Only Landmark=**Leave Unchecked**
+=== Create Segment ===
+A subset of 3 of these Landmarks can be used to represent the Segment Coordinate System.
+To create the segment, switch to the Segment Tab in model builder mode.
+In the Segment Name combo box type **Virtual Lab**
+Check the **Kinematic Only** Check Box
+Click the **Create** button
+In the segment definition dialog, enter the following:
+Define Proximal Joint and Radius\\
+Lateral= Joint=**Lab_Z** Medial= Radius=**0.001**
+Define Distal Joint and Radius\\
+Lateral= Joint= **Lab_Origin** Medial= Radius=**0.001**
+Extra Target To Define Orientation (if needed)\\
+Location **Lateral**=**Lab_X**\\
+Select Tracking Markers**\\
+**
+**Use Calibration Targets for Tracking Checked**
+Select **Build Model**
+=== Add a surface model ===
+To add a surface model select the **Virtual Lab** Segment and switch to the **Segment Properties** Tab. Near the bottom of the dialog, Browse for a Model File and select **Apply** after the selection.