PPT-OpenGL & OpenSceneGraph

Graphics Programming Katia Oleinik koleinikbuedu Graphics Programming OpenSceneGraph Higher level built upon OpenGL Written in standard C Windows Linux Mac and few more 2D 3D computer graphics. Graphics with OpenGL/GLUT What is OpenGL? • OpenGL ( Open G raphics L ibrary) • A software interface to graphics hardware • a standard specification defining a cross - language, c Graphics Programming. Katia Oleinik: koleinik@bu.edu. Graphics Programming. OpenGL. Low-level API. cross-language . cross-platform . 2D, 3D computer graphics. GLUT - The OpenGL Utility Toolkit. simple, easy and small. M. . Ramanathan. STTP CAD 2011. Introduction to OpenGL. What Is OpenGL?. Graphics rendering API. high-quality color images composed of geometric and image primitives. window system independent. operating system independent. Dave Shreiner. Ed Angel. Vicki Shreiner. 2. What You’ll See Today. General OpenGL Introduction. Rendering Primitives. Rendering Modes. Lighting. Texture Mapping. Additional Rendering Attributes. Imaging. Phil . Napieralski, . Doug Erickson, Richard McKinney. Program . Manager, . Senior Content Developer, CTO . Halfbrick. 3-189. Getting started . Bringing . OpenGL ES 2.0 to . DirectX. Case . Study by . WebGL. . Drawing Functions. CSCI 440. Day Five. OpenGL History. 1991. - SGI . Inc. current - . Khronos. consortium. 2004. - OpenGL 2.0 . replaced 1.5. added the GLSL . shader. language. 2008. - OpenGL 3.0 . Window reshaping, Keyboard interaction, Camera, Drawing objects. George Georgiev. Telerik Corporation. www.telerik.com. Table of Contents. Project using OpenGL & FreeGLUT in MSVC++. Window reshaping. Graphics Programming. Katia Oleinik: koleinik@bu.edu. Graphics Programming. OpenSceneGraph. Higher level, built upon OpenGL. Written in standard C++. Windows, Linux, Mac and few more. 2D. , 3D computer graphics. It is . NOT. a . programming language. .. It . is a Graphics Rendering . API. . consisting of a . set of . functions . with . a well . defined interface.. Whenever . we say that a program is OpenGL-based or OpenGL applications, we mean that it is written in some programming language (such as C/C or Java) that makes calls to one or more of OpenGL libraries. Department of Geography and Planning. University at Albany. What is a GPU?. A GPU is a . graphics processing unit. Modern GPUs are composed of multiple processors. Each of these processors can perform operations similar to those of CPUs. COMP 175: Computer Graphics. April 18, 2018. Last week, we discussed the many of the new “tricks” in Graphics require low-level access to the Graphics pipeline. For example, using textures, which is a pain in regular OpenGL.. Ed Angel. University of New Mexico. Dave . Shreiner. ARM, Inc. Evolution of the OpenGL Pipeline. A Prototype Application in OpenGL. OpenGL Shading Language (GLSL). Vertex Shaders. Fragment Shaders. Examples. Katia Oleinik: koleinik@bu.edu. Graphics Programming. OpenGL. Low-level API. cross-language . cross-platform . 2D, 3D computer graphics. GLUT - The OpenGL Utility Toolkit. simple, easy and small. window system independent toolkit for writing OpenGL programs;. based on materials from http://www.openscenegraph.org/. Agenda:. Introduction to OpenSceneGraph. Hardware requirements. Overview of OSG structure. First example – displaying a model. Building primitives.