Inside-Outside Tests ● Inside- Outside test rea-filling algorithms and other graphics processes often need to identify interior regions of objects For simple object, it is a straightforward process For complex objects, graphics packages normally use either 1.Odd-Even(a f-5)rule(Odd-Parity rule or Even-Oddrule) 2. Non-zero winding(環繞) number ruleInside-Outside Tests  Inside-Outside test ▪ Area-filling algorithms and other graphics processes often need to identify interior regions of objects. ▪ For simple object, it is a straightforward process. ▪ For complex objects, graphics packages normally use either: 1. Odd-Even (奇偶) rule (Odd-Parity rule or Even-Odd rule) 2. Non-zero winding (環繞) number rule 10