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Polygon Clipping. CS5600 Computer Graphics Rich Riesenfeld Spring 2006. Lecture Set 5. Ex: Simple Convex. Ex: Multiple Components. Nonconvex with Many Edges. Polygons : Before Clipping. Top Clip Boundary. Polygons: Clip on Top. Right Clip Boundary. Polygons: Clip on Right.

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## Polygon Clipping

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**Polygon Clipping**CS5600 Computer Graphics Rich Riesenfeld Spring 2006 Lecture Set 5**Ex: Simple Convex**CS5600**Ex: Multiple Components**CS5600**Nonconvex with Many Edges**CS5600**Polygons : Before Clipping**CS5600**Top Clip**Boundary Polygons: Clip on Top CS5600**Right Clip**Boundary Polygons: Clip on Right CS5600**Bottom Clip**Boundary Polygons: Clip on Bottom CS5600**LeftClip**Boundary Polygons: Clip on Left CS5600**Polygons: Clipped Polygon**CS5600**Begin Animated Recap**CS5600**Polygons: Before Clipping**CS5600**Top Clip**Boundary Polygons: Clip on Top CS5600**Top Clip**Boundary Polygons: Clip on Top CS5600**Right Clip**Boundary Polygons: Clip on Right CS5600**Right Clip**Boundary Polygons: Clip on Right CS5600**Bottom Clip**Boundary Polygons: Clip on Bottom CS5600**Bottom Clip**Boundary Polygons: Clip on Bottom CS5600**LeftClip**Boundary Polygons: Clip on left CS5600**LeftClip**Boundary Polygons: Clip on left CS5600**Polygons: Fully Clipped**CS5600**Polygons: Clip on Left**Left Clip Boundary CS5600**Polygons: Clipped Polygon**CS5600**End Animated Recap**CS5600**Polygons: Case 1**IN OUT S Polygon being clipped Clip boundary P: output CS5600**Case 1: S&Pboth IN**Action: OutputP**Polygons: Case 2**IN OUT P S i output CS5600**Case 2: SIN; POUT**Action: Outputi (Swas already output under Case 1)**Polygons: Case 3**IN OUT P S (no output) CS5600**Case 3: S&Pboth OUT**Action: None**Polygons: Case 4**P: second output IN OUT S i: first output CS5600**Case 4: SOUT; PIN**Action: Outputi and P**Action:OutputP**Case 1:S&Pboth IN Case 2: SIN; POUT Action:Outputi (Salready output under Case 1) Case 4:SOUT;PIN Case 3: S & P both OUT Action:OutputiandP Action:None**Hodgeman-Sutherland**CS5600**Hodgeman-Sutherland**CS5600**Hodgeman-Sutherland: Top**CS5600**Hodgeman-Sutherland: Top**CS5600**Hodgeman-Sutherland: Bottom**CS5600**Hodgeman-Sutherland: Bottom**CS5600**Hodgeman-Sutherland: Bottom**CS5600**Hodgeman-Sutherland: Right**CS5600**Hodgeman-Sutherland: Right**This case is trivial: donothing CS5600**Hodgeman-Sutherland: Left**CS5600**Hodgeman-Sutherland: Left**CS5600**Hodgeman-Sutherland: Left**CS5600**Hodgeman-Sutherland: Done**CS5600**Begin Animated Recap**CS5600**Top**Done

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