title: How to connect points taking into consideration position and orientation of each of them
body: <p>In the attached image we can see the groundtruth (green) and the estimation (red) of the motion of a point. Each number next to the circle with the bar (=pattern) correspond to a time. Now that all the algorithm has been developed I would like to improve the quality of the visualization by connecting all the pattern together taking into consideration the position but also the orientation (defined by the direction of the bar). I tried to find a way to do that but couldn't find any. Anyone has an idea? </p>
  
  <p>For information: I have the coordinates (x,y) and the angle which could be changed into the derivative if necessary.</p>
  
  <p>EDIT: Here are some clarification regarding the way I would like to connect the patterns together.</p>
  
  <ul>
  <li>I would like to connect all the patterns in the order of the number next to each pattern</li>
  <li>I would like my curve to go through the center of each pattern</li>
  <li>I would like the steepness of my curve at each pattern being the same as the drawn bar has.</li>
  </ul>
  
  <p>To sum up: I am looking for a way to plot a curve connecting points and fitting a desired steepness at each point. </p>
  
  <p><img src="https://i.stack.imgur.com/okotI.jpg" alt="Image available here"></p>