6 Replies Latest reply on Jun 3, 2010 3:01 PM by NiceNick12345

    Fisheye - From a circle to sphere

    NiceNick12345

      I have an image made up of a few hundred dots arranged so there is one dot in the middle with 8 dots touching it and then more circles of dots outside those and then more circles outside those... the final image is sort of circular.

       

      I would like to apply an effect so that the dots look as though they are on a sphere - see attached image made in another program - but I need to do this in illustrator. When I try to do this using the fisheye effect I do not get a circle but a rounded square.

       

      Any help would be appreciated

      nic

      8.jpg

        • 1. Re: Fisheye - From a circle to sphere
          Doug Katz Level 4

          Use a circular envelope and adjust the control handles.

          • 2. Re: Fisheye - From a circle to sphere
            NiceNick12345 Level 1

            Thanks for that Doug

             

            but doesnt do the job that I was after. Using a circle as an envelope does not alter the edges significantly enough to create a ball effect. The dots at the very edges of the objects should be very flat ellipses and this method does not allow that to be altered, So it ends up looking curved but not enough to look like a pattern printed on a ball.

            nic

            • 3. Re: Fisheye - From a circle to sphere
              Doug Katz Level 4

              As I say, you might want to see what impact adjusting the length of the control point handles has. Let me be more specific:

               

              1. Select the mesh tool after you've made your elliptical envelope and click in the exact center (use guides if you have to)

               

              2. Now start extending and retracting the north, south, east and west handles... I mean the ones that were created when you added a mesh center point. When you begin to adjust the handles that extend inward toward the center of the envelope, note the changes to those ellipses at the edge of the envelope.

               

              3. Also play with the four handles of the center point. These adjustments should help you flatten your edge ellipses to taste.

              1 person found this helpful
              • 4. Re: Fisheye - From a circle to sphere
                MWHebert Level 1

                Check out this script from Lines about to be generated:

                 

                http://lines-about-to-be-generated.blogspot.com/2009/06/script-circles-on-sphere.html

                 

                Might be just what you need.

                1 person found this helpful
                • 5. Re: Fisheye - From a circle to sphere
                  NiceNick12345 Level 1

                  Thanks Doug,

                  This really is very helpful. I have been trying out your method and another one I found using 3D revolve. (The 3d revolve method seems to need a rectangular object (with a map like projection to begin with.

                  I have one question and wonder if you might know - Does using just the central and edge control points allow the sort of distortion you would see on a sphere (ie nearly flat in the centre moving to very steep at the edge) as a curved variation rather than as a linear one?

                   

                  I will continue playing and may be able to answer this for myself.

                   

                  Thanks

                  nic

                   

                  I have played and found.

                   

                  After following the method described

                   

                  By pulling out the nodes at 45,135, 225 and 315 degrees and adjusting the handles you can reform the dots back into a large circle

                   

                  You can alter the mesh from the centre and 0,90,180,270 degrees and have a curved type variation

                   

                  You can get the change between the centre and edges to work as if the dots were on a curve. BUT this is not very effective because the changes do not take place around the whole of the arc equally - ie the ellipses at 0 and 90 degrees are the same shape (although rotated) but the ellipses between (say at 45degrees) are not, fixing this by adding and adjusting nodes at 45 degrees minimises the issue but leaves the ellipses in between (say at 22.5 degrees) uncorrected (although the error is smaller).

                  • 6. Re: Fisheye - From a circle to sphere
                    NiceNick12345 Level 1

                    Thanks MW

                     

                    The script is just what I was looking for before I made the images (and didnt find). Now I have made them flat and am trying to find a way to curve them - I cant face going back to the drawing board. I suspect that once I have overcome my immediate problems I will try and redo the images based upon the script.

                    Thanks

                    nic