PPT-Graphics Pipeline Clipping

CMSC 435634 Graphics Pipeline Objectorder approach to rendering Vertex Processing Clipping Rasterization Fragment Processing Visibility amp Blending Transformations Vertex components of shading. 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 Joy Visualization and Graphics Research Group Department of Computer Science University of California Davis 1 Overview The primary use of clipping in computer graphics is to remove objects lines or line segments that are outside the viewing volume T edu CSE 480580 Lecture 9 Slide 1 brPage 2br Define Clip Rectangle Region Start with rectangular clip region clipbox defined by xl xr yt yb yt yb xl xr Clipping Points How determine if point should be displayed Clipping Lines More difficult yt yb xl x Clipping. CMSC 435/634. Graphics Pipeline. Object-order approach to rendering. Sequence of operations. Vertex processing. Transforms. Vertex components of shading/texture. Clipping. Find the visible parts of any primitives. CLIPPING. To be discussed…. Clipping . Types of Clipping. - Point Clipping. - Line Clipping. Line Clipping Algorithm. Cohen Sutherland line clipping . algo. . Clipping:. Clipping is a process of dividing an object into visible and invisible positions and displaying the visible portion and discarding the invisible portion.. Viewing In 2D. Contents. *. Windowing Concepts. *. Clipping. Point Clipping . Line Clipping. . -Cohen-Sutherland Clipping Algorithm. *. Area Clipping. Sutherland-. Hodgman. Area Clipping Algorithm. Clipping. CMSC 435/634. Graphics Pipeline. Object-order approach to rendering. Sequence of operations. Vertex processing. Transforms. Vertex components of shading/texture. Clipping. Find the visible parts of any primitives. Lecture . 7. : 2D Clipping Algorithm. Recap. 2D Viewing pipeline. Model .  . World .  View  Device. Model to view transformation. Viewing  Clipping. . 2D viewing in OpenGL. Objective. 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:. Lecture 1. 2. : . 3D Clipping. Recap. Parallel projection. Normalized coordinate transformation. . Orthographic. . Oblique. . Perspective. Objective. After completing this lecture students will be able to. 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. Chapter 8. :. The. Rendering. Pipeline. Interactive Computer Graphics. Chapter 8 - . 2. Overview. Vertex processing. : normalization, . transformations, lighting, projection. Clipping and primitive assembly clipping. 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.