3 days ago · The architecture of OpenGL is based on a client-server model. An application program written to use the OpenGL API is the "client" and runs on the CPU. The implementation of the OpenGL graphics engine (including the GLSL shader programs you will write) is the "server" and runs on the GPU.

Sep 19, 2023 · Open Graphics Library (OpenGL) is a cross-language (language independent), cross-platform (platform-independent) API for rendering 2D and 3D Vector Graphics(use of polygons to represent image). OpenGL API is designed mostly in hardware.

OpenGL meets these criteria by providing a simple, direct in-terface to the fundamental operations of 3D graphics rendering. It supports basic graphics primitives such as points, line segments, polygons, and images, as well as basic rendering operations such as affine and projective transformations and lighting calculations.

Graphics Architecture Kurt Akeley Pat Hanrahan http://www.graphics.stanford.edu/courses/cs448a-01-fall CS448 Lecture 15 Kurt Akeley, Pat Hanrahan, Fall 2001 The OpenGL® Graphics System Outline Introduction and history Block diagrams Goals and approaches Details Successes Mistakes Lessons Future

Introduction to OpenGL • Open Graphics Library, managed by Khronos Group • A software interface to graphics hardware (GPU) • Standard API with support for multiple languages and platforms, open source • ~250 distinct commands • Main competitor: Microsoft’s Direct3D • http://www.opengl.org/wiki/Main_Page

Pipeline Architecture • Pioneered by Silicon Graphics, picked up by graphics chips companies, Nvidia, 3dfx, S3, ATI,... • OpenGL library was designed for this architecture (and vice versa) • Good for opaque, textured polygons and lines

“An Interactive Introduction to OpenGL Programming” provides an overview of the OpenGL Application Programming Interface (API), a library of subroutines for drawing three-dimensional objects and images on a computer.

OpenGL meets these criteria by providing a simple, direct in-terface to the fundamental operations of 3D graphics rendering. It supports basic graphics primitives such as points, line segments, polygons, and images, as well as basic rendering operations such as affine and projective transformations and lighting calculations.

OpenGL is a software interface that allows the programmer to create 2D and 3D graphics images. OpenGL is both a standard API and the implementation of that API. You can call the functions that comprise OpenGL from a program you write and expect to see the same results no matter where your program is running.

Objects are organized in a hierarchy: the scenegraph. In this hierarchy, objects have translations and orientations relative to their parent node. Relative translations and orientations are specified using matrices. Mesh vertices are defined in a coordinate system known as object space. 3D engine raison d'être: it's a visualizer for a scene graph.