better docstrings

gen_docs/coordinate.rst

@@ -16,7 +16,7 @@ Coordinate Systems
 - **yaw** (deg): rotation along the z-axis. Positive yaw rotates the object from the positive x-axis to the positive y-axis
 - **pitch** (deg): rotation along the y-axis. Positive pitch rotates the object from the positive x-axis to the positive z-axis
 - **roll** (deg): rotation along the x-axis. Positive roll rotates the object from the positive y-axis to the positive z-axis
-- **origin** (m): ``[x, y, z]``, the rotation centor of the object. Radar's origin is always at ``[0, 0, 0]``
+- **origin** (m): ``[x, y, z]``, the motion (rotation and translation) centor of the object. Radar's origin is always at ``[0, 0, 0]``
 
 .. image:: https://raw.githubusercontent.com/radarsimx/radarsimpy/master/assets/yaw_pitch_roll.svg
     :width: 400

src/radarsimpy/simulator_lidar.pyx

@@ -66,7 +66,7 @@ cpdef sim_lidar(lidar, targets, frame_time=0):
         - **model** (*str*):  
           File path to the target model (3D object) in the scene.
         - **origin** (*numpy.ndarray*):  
-          The origin position of the target model in meters (m), specified as [x, y, z].  
+          The origin position (rotation and translation center) of the target model in meters (m), specified as [x, y, z].  
           Default: ``[0, 0, 0]``.
         - **location** (*numpy.ndarray*):  
           The 3D location of the target in meters (m), specified as [x, y, z].  

src/radarsimpy/simulator_radar.pyx

@@ -75,7 +75,7 @@ cpdef sim_radar(radar, targets, frame_time=0, density=1, level=None, log_path=No
           A target represented as a 3D model. Each target is defined as a dictionary with the following keys:
 
             - **model** (*str*): Path to the target model file.
-            - **origin** (*numpy.ndarray*): Origin position of the target model [x, y, z] in meters. Default: ``[0, 0, 0]``.
+            - **origin** (*numpy.ndarray*): Origin position (rotation and translation center) of the target model [x, y, z] in meters. Default: ``[0, 0, 0]``.
             - **location** (*numpy.ndarray*): Location of the target in meters [x, y, z]. Default: ``[0, 0, 0]``.
             - **speed** (*numpy.ndarray*): Target velocity in meters per second [vx, vy, vz]. Default: ``[0, 0, 0]``.
             - **rotation** (*numpy.ndarray*): Target orientation in degrees [yaw, pitch, roll]. Default: ``[0, 0, 0]``.

src/radarsimpy/simulator_rcs.pyx

@@ -65,7 +65,7 @@ cpdef sim_rcs(targets,
         - **model** (*str*):  
           File path to the 3D target model.
         - **origin** (*numpy.ndarray*):  
-          The origin position of the target model in meters (m), specified as [x, y, z].  
+          The origin position (rotation and translation center) of the target model in meters (m), specified as [x, y, z].  
           Default: ``[0, 0, 0]``.
         - **location** (*numpy.ndarray*):  
           The 3D location of the target in meters (m), specified as [x, y, z].