Feather Parameter

From Synfig Studio :: Documentation
Revision as of 03:55, 9 February 2008 by Dooglus (Talk | contribs) (About the Feather Concept)

Jump to: navigation, search
Languages Language: 

English


About the Feather Concept

Feather is a float value in points (or whatever unit you have defined in File > Setup > Misc > Unit System) that represents the width of the area that is going to be dissolved at the edge. Feather is the light horny waterproof structure forming the external covering of birds. See English Feather definition.

The Feather parameter is an standard parameter for the following types of layers:

Strangely Rectangle Layer doesn't have the Feather parameter.

When you apply a Feather to any of those layers, then the edge of the shape becomes dissolved and spread out and shrunk the amount that the Feather value indicates.

Circle Feather zero.png Circle Feather 20.png
Circle with Feather set to 0 points Circle with Feather set to 20 points

Feather's Complementary Parameters

There is another parameter that works together with the Feather parameter, and which specifies the type of feathering to be used. On Circle layers the parameter is called Fall Off and for the other featherable layers it is called Type of Feather.

Type of Feather

This complementary parameter can be set in Outline Layer, Region Layer, Polygon Layer and Star Layer. All the example images below have the same amount of Feather (set to 20 points).

Star Feather Fast Gaussian Blur.png Star Feather Gaussian Blur.png Star Feather Disc Blur.png
Fast Gaussian Blur Gaussian Blur Disc Blur
Star Feather Box Blur.png Star Feather Cross-Hatch Blur.png
Box Blur Cross-Hatch Blur

Fall Off

That's the type of feather for the Circle Layer. All the example images below have the same amount of Feather (set to 20 points).

Circle Feather 20.png Circle Feather Square.png Circle Feather Linear.png
Square Root Square Linear
Circle Feather Sigmond.png Circle Feather Cosine.png
Sigmond Cosine


Languages Language: 

English