Whenever I draw an integral sign (using paintbrush tool) for those math savvy people know that the symbol is an elongated "S".
I am writing a document using the paintbrush tool because I want to convert hand written notes into PDF using illustrator because there are alot of scientific illustrations.
When I write math notes and write the integral sign the following appears in the image below. It is like half of the end of the elongated ends become "half-filled" instead of one nice vector stroke (see image below). How do I stop it from doing that ?
Use a Math font. Seriously. You are *drawing* text? It's the 21st century, you know, no need anymore for quills or fountain pens.
If you do this because you prefer the manual touch hand-drawn text provides, draw your integrals with the line tool. This effect you see may be an artefact of the brush tool, which thinks you are painting something -- I seriously doubt it was meant for "writing".
A font that contains math symbols. Even the standard default font that comes installed with your average operating system "Symbol" contains a proper integral sign (in two parts; a legacy issue).
"Symbol" is pretty limited -- again, it's sort of a legacy font by now --, you might be better off with a modern version of Times New Roman, or, when in dire straits, Arial Unicode MS. These contain *lots* of special mathematical operators. A specialized math font tops that off with integrals, summations, and brackets in various sizes. If you are on a Windows machine, check out the glyph set of Cambria Math, and you will see why it's got that name.
And then there's always Google.
that is a long outstanding bug.
You can get a math font free here
I double clicked and set everything as low as possible and unchecked all options using the pain tool and the pencil tool. That annoying little thing still happens. When I used my ipod touch to draw an integral sign using Adobe Ideas it was perfect, it had the same smoothness attribute that illustrator had and yet it didn't produce that "half-fill" thing. I wish adobe ideas were for windows with Wacom tablet support that would be fantastic.
if I set the stroke size to the lowest for example 0.01 inch and I zoom in very close and write, I still get that half-fill in opposite ends of the integral sign as my post #1. I also get this bug when I draw 2's or matter of fact, anything with a semi-circle for example, letter g's with the bottom curve intersecting the right vertical line as cursive writing a person's name who has a letter "g" in it.