PPT-Clipping Concepts, Algorithms for line clipping

1 of 16 Clipping 101217 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. 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 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. Images were taken from the book: “Interactive Computer Graphics” by Angel and Shreiner. Normal Vectors. How to compute the normal per . planar. face?.  . Normal Vectors. However, vertex normals are not well defined. 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 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:. Infection . Prevention Consultant . . Boston. , MA. www.maureenspencer.com. Pre-Operative Surgical Clipping: . New Advances in Efficiency and Infection Prevention. Agenda. Why? Clinical Rationale for Clipping. Eric Lengyel. Outline. Projection Matrix Internals. Infinite Projection Matrix. Depth Modification. Oblique Near Clipping Plane. Slides available at http://www.terathon.com/. From Camera to Screen. Camera. Lecture 1. 2. : . 3D Clipping. Recap. Parallel projection. Normalized coordinate transformation. . Orthographic. . Oblique. . Perspective. Objective. After completing this lecture students will be able to. Ouhyoung. 歐陽明. . Professor . Dept. of CSIE and GINM. NTU. 3D Viewing Process. Transform. into viewport. in 2D device. coordinates. for display. Project onto. projection. plane. Clip against. view. 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. Practical: Starting out in Python. Teaching Computing to KS3. Course outline. Week No. Understanding computers. (5:00 – 6:00). Developing programming skills. (6:00 – 7:00). 23rd January. Algorithms. . SYFTET. Göteborgs universitet ska skapa en modern, lättanvänd och . effektiv webbmiljö med fokus på användarnas förväntningar.. 1. ETT UNIVERSITET – EN GEMENSAM WEBB. Innehåll som är intressant för de prioriterade målgrupperna samlas på ett ställe till exempel:.