title: Unity game - generate circuit with line drawing
body: <p>I'm not a very beginer in unity, but not so far ;). 
  Today, I want to make a game which is a mix pool pinball. 
  The game physic is quite ok for me, but my big challenge is :
  <a href="https://i.stack.imgur.com/N0wBp.jpg" rel="nofollow noreferrer">what i want to do</a></p>
  
  <p>Allow the player to draw his own circuit and then place the different item : bumper, sticky wall ...</p>
  
  <p>I make it in 3D, but with the camera position, it will be like 2D. 
  First of all, I don't know how to make curvy gameobject. I know about bezier curve generator, but not how generate shape with.</p>
  
  <p>Ideally, it would be great if I could : draw a line (with the mouse or finder position) like a line renderer component and then unity extrude in one direction the field circuit. And that' it I have my circuit.
  The second challenge will be to place (whit mouse or finger) the different component : bumper, players... with some rules : A sticky wall have to be on a simple wall from the circuit, not in the middle, you have to alway keep some space for the balls etc...
  Then we create a game circuit, then we could play :):)</p>
  
  <p>I work with the last unity version. </p>
  
  <p>Obviously, I don't expect a full solution:rolleyes:, but according to you, is it possible ? And which way, which technic I should learn to do that? Which could be the big issu ? ... any remark advice is good to take.</p>
  
  <p>I already begin to look at <a href="https://unity3d.com/fr/learn/tutori...ation-tutorial/creating-meshes?playlist=17153" rel="nofollow noreferrer">https://unity3d.com/fr/learn/tutori...ation-tutorial/creating-meshes?playlist=17153</a>, I d'ont know if it's completly too much or not ?</p>
  
  <p>Many thanks for your help,
  Axel</p>