Fake 2D Realtime Raycast Shadows (for unity free version)

8 Comments + Add Comment

• 
  mgear 11/01/2012 at 00:26

  Added webplayer demo v1.0

  Reply
• 
  Marrt 13/02/2012 at 16:03

  -Interesting method, how is performance/# of rays?
  (this would be very useful for me if the ray# can be high. i want to draw a cone of sight with this but for the edges of obstacles in great distances the gap between rays would be to high i guess…)
  -is it possible to create this as a cutoutpolygon for a already placed shadowpolygon?

  Reply
• 
  mgear 13/02/2012 at 20:49

  Added source download (had forgotten to upload it)
  So you can test it.. (I’ve only tested on this small scene)

  Reply
• 
  mgear 14/02/2012 at 18:42

  Actually, theres no need to triangulate it every frame, for example
  if you use this kind of mesh (every triangle connects to the middle always)
  http://unitycoder.com/blog/2012/01/06/noob-triangulator-js/

  Then all you need to do is,
  – Do scan
  – Modify vertices

  (saves creating: “uv maps”, “triangulation” etc.. from the Update loop)

  Reply
• 
  mgear 15/02/2012 at 01:24

  New test version, much faster: http://unitycoder.com/upload/demos/mShadowRayScan2/

  Reply
  • 
    castor 18/07/2013 at 00:59

    This looks amazing!
    Do you have the source for that second much faster version?

    Reply
    • 
      mgear 18/07/2013 at 01:37

      Yes, its this one: http://unitycoder.com/blog/2012/02/15/raycast-realtime-visibility-2-0/

      Reply
      • 
        castor 18/07/2013 at 06:03

        thanks! This works so well. Is there a way to limit the raycasting to just one specific object?

        Reply