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--- visual3d:documentation:modeling:segments:hip_landmark [2024/07/17 15:42] – removed sgranger
+++ visual3d:documentation:modeling:segments:hip_landmark [2024/07/17 15:45] (current) – created sgranger
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+====== Hip Landmark ======
+The following three Pelvis Segment Types create hip joint landmarks automatically:
+  * [[Visual3D:Documentation:Modeling:Segments:Coda_Pelvis|Coda Pelvis]]
+  * [[Visual3D:Documentation:Modeling:Segments:V3D_Composite_Pelvis|V3D_Composite_Pelvis]]
+  * [[Visual3D:Documentation:Modeling:Segments:Helen_Hayes_(Davis)_Pelvis|Helen Hayes Pelvis]]
+The [[Visual3D:Documentation:Modeling:Segments:Visual3D_Pelvis|Visual3D Pelvis]] does not automatically create a Hip Joint Landmark.
+It's important to note that if the thigh segment is tracked with one of the Hip Joint Landmarks, the thigh segment will not have 6 degrees of freedom because these landmarks are tracked in the pelvis coordinate system. This means that any errors in the pelvis tracking will cause errors in the thigh tracking.
+Although you cannot modify the definition of the automatically created landmarks, you can create your own, or [[Visual3D:Documentation:Modeling:Segments:Hip_Joint_Landmarks|use these regression equations]].