Difference between revisions of "Winding Style Parameter"

Revision as of 21:55, 2 October 2007

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The Winding Style parameter is available in these layers:

• Outline Layer
• Region Layer
• Polygon Layer
• Star Layer

It determines the way in which Synfig decides whether a point is 'inside' or 'outside' which coloring the layer in.

The Winding Style parameter has two possible values:

• Non Zero
• Even/Odd

The easiest way to see the distinction is to draw a region which contains a loop inside itself:

source .sif file

The top two images have their region winding styles set to "Non Zero" and the bottom two have their region winding styles set to "Even/Odd". "Even/Odd" makes the region see-through when it crosses itself.

The left two images have their outline winding styles set to "Non Zero" and the right two have their outline winding styles set to "Even/Odd". "Even/Odd" makes the outline see-through when it crosses itself.

http://dooglus.rincevent.net/synfig/regions.html has notes I made while investigating how region filling works, and describes the Winding Style parameter.

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