With a blur you have a partially transparent edge, so it smoothly rises from the 0 to the 100%, like rolling hills. Without a blur you can imagine that the height is 0% outside the shape and 100% inside - like a cliff or a plateau. SVG uses the alpha channel to represent the height map. The simplest way to create a height map is by applying a gaussian blur. Depending on how you wire up your filters you can preserve the colours and using a bit of gradient will always help to give a word-art logo like this a bit more richness. The wording is just normal text but I've tweaked the kerning a little this time. I'm using the star tool with a bit of randomness to start me out with a blob. I created this graphic by drawing a blob, adding some text (in a font called "Balcony Angels") and then painstakingly drawing out the highlights (specular lighting) as partially-transparent white paths. I want to start with an example of a graphic I created way way back with Inkscape 0.38.
Allow me to walk you through creating a filter in Inkscape 0.46.
Unfortunately, you will need a fairly deep knowledge of 2D image processing to make use of SVG filters. But with the collection of other filters provided, it also provides a building block for constructing some very complicated and useful graphical operations that could previously only be done with a raster tool like The Gimp. On its own, Gaussian blur was an incredible useful filter, offering soft edges and powerful shading techniques.
Inkscape's 0.45 release saw the implementation of its first filter: Gaussian blur. What this entails is that it's possibly to take very simple vector shapes, bung on a filter, and get some very pretty artwork which can still be edited as paths. SVG filters are a section of the SVG language for connecting simple, well-defined raster operations and applying those to rasterised vector shapes in the document. One of the most stunningly powerful features of the recently release Inkscape 0.46 is the ability to design SVG filters.
0 kommentar(er)
