I'm sure some of you remember my recent posts showing off the high quality of Adobe Illustrator's path offset and outline stroke effects (particularly in comparison with similar effects in CorelDRAW). I still use Corel for a great deal of sign design work, but I bring a lot of Corel-generated artwork into Illustrator for things like outline effects.
Early on, I ran into a problem when "expanding" outline strokes into editable vector paths. The newly expanded path would have lots of overlapping areas. Macromedia Freehand has its dedicated Remove Overlap Xtra. Illustrator doesn't have an obvious function like that. In the attached JPEG image, I would wind up with expanded strokes with issues like what you see in "example two." Sometimes I could draw in a rectangle and use the Pathfinder function to make all the overlaps weld. Most of the time that method wouldn't work. I would end up taking the artwork into Freehand to get rid of the overlaps.
But then I came across the thing that did the trick. Typical of Illustrator, the solution is not very obvious. You have to open the "Attributes" palette. There are two little buttons on the right side of the palette. One button tells a selected object to use the "even-odd fill rule," which is what you see in "example two." Just about any piece of Corel-based artwork will import with that even-odd fill attribute, be it an exported EPS file or a CDR file Illustrator CS2 can open directly. Artwork generated within Illustrator tends to default to the other attribute: "non zero winding fill rule."
The tip: if you want to get rid of stroke overlaps make sure the non zero winding fill rule attribute is applied to the object before you expand the stroke into an editable vector path. Once the path is expanded, you can alt-click on the "add" button in the Pathfinder palette. Pretty easy.
Using this tip in conjunction with a nifty shareware plug-in from Telegraphics that computes path area and path length, you can actually design some very accurate and attractive neon patterns from within Illustrator CS2.
Early on, I ran into a problem when "expanding" outline strokes into editable vector paths. The newly expanded path would have lots of overlapping areas. Macromedia Freehand has its dedicated Remove Overlap Xtra. Illustrator doesn't have an obvious function like that. In the attached JPEG image, I would wind up with expanded strokes with issues like what you see in "example two." Sometimes I could draw in a rectangle and use the Pathfinder function to make all the overlaps weld. Most of the time that method wouldn't work. I would end up taking the artwork into Freehand to get rid of the overlaps.
But then I came across the thing that did the trick. Typical of Illustrator, the solution is not very obvious. You have to open the "Attributes" palette. There are two little buttons on the right side of the palette. One button tells a selected object to use the "even-odd fill rule," which is what you see in "example two." Just about any piece of Corel-based artwork will import with that even-odd fill attribute, be it an exported EPS file or a CDR file Illustrator CS2 can open directly. Artwork generated within Illustrator tends to default to the other attribute: "non zero winding fill rule."
The tip: if you want to get rid of stroke overlaps make sure the non zero winding fill rule attribute is applied to the object before you expand the stroke into an editable vector path. Once the path is expanded, you can alt-click on the "add" button in the Pathfinder palette. Pretty easy.
Using this tip in conjunction with a nifty shareware plug-in from Telegraphics that computes path area and path length, you can actually design some very accurate and attractive neon patterns from within Illustrator CS2.