PPT-CS112: Culling and Clipping

Clip Coordinates vs NDC Clip space lefthanded Clip coordinate Normalized device coordinate NDC Culling discarding invisible polygons Backface culling Discarding all faces ie polygons that face backward ie whose . In rendering complex 3D images it has to be done several thousand times Ef64257cient algorithms are therefore very important We present such an ef64257cient algorithm for clipping arbitrary 2D polygons The algorithm can handle arbitrary closed polyg A couple important questions to ask are what is the potential for increased profits on farms and what are the management issues that impact the cull rate In discussing these issues with dairy producers and agriservice I have heard different comments Viewing In 2D. Contents. *. Windowing Concepts. *. Clipping. Point Clipping . Line Clipping. . -Cohen-Sutherland Clipping Algorithm. *. Area Clipping. Sutherland-. Hodgman. Area Clipping Algorithm. 網媒所. 林宏祥. . 2012.10.02. Overview. Orthogonal Projection. -Z. X. x. camera. x. viewport. Perspective . P. rojection. -Z. X. x. camera. x. viewport. d. z. View Volume—orthogonal projection. 1 Clipping Transform intoframe bufferin frame buffer Clipping in the 2D pipeline Clipping references Clipping references Hearn and Baker Hearn and Baker C C - - S (lines): p 317 S (lines): p 317 L Department of Computing and Information Sciences, . KSU. KSOL course pages: . http://bit.ly/hGvXlH. / . http://bit.ly/eVizrE. . Public mirror web site: . http://www.kddresearch.org/Courses/CIS636. Instructor home page: . CSCI 440. textbook section 8.3-8.7. Starter Question. How do we clip these lines?. X=-5. Y. =-5. Y=5. X=5. [0,0]. [3,3]. [7,-3]. [0,-3]. formula from . wikipedia. Goals of Clipping. Reject, Accept, or Accept a portion. 1. Clipping. Clipping is a process of dividing an object into visible and invisible portions and displaying the visible portion and discarding the invisible portion.. Types of Clipping:. Generally we have Clipping algorithm for the following primitive type:. Introduction to Computer Graphics. Forward Rendering Pipeline. Clipping and Culling. Rendering Pipeline. Sequence of operations that is used to draw primitives defined in a 3D coordinate system on a 2D window. 1. of 16 . Clipping - 10/12/17. Clipping endpoints. If . x. min. ≤ x ≤ . x. max. . . and. . y. min. . ≤ . y . ≤ . y. max. . , . the point is inside the clip rectangle.. Endpoint analysis for lines:. Forward Rendering Pipeline. Clipping and Culling. Rendering Pipeline. Sequence of operations that is used to draw primitives defined in a 3D coordinate system on a 2D window. Can be implemented on . hardware. Masahiro . (. Masa) Ohnishi. Ph.D. Student. Caesar Kleberg Wildlife Research Institute. Texas A&M University – Kingsville. Committee Members. Randy DeYoung. Charles DeYoung. David Hewitt. Strickland Bronson. CMSC 435/634. Graphics Pipeline. Object-order approach to . rendering. Vertex Processing. Clipping. Rasterization. Fragment Processing. Visibility & Blending. Transformations. Vertex components of shading. Types of Clipping:. Generally we have Clipping algorithm for the following primitive type:. Point Clipping. Line Clipping . Area Clipping (Polygon). Curve Clipping. Text Clipping. . 2. Point Clipping.