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May 18, 2020 · This section will give you a bit of background about the history of OpenGL and about the graphics hardware that supports it. In the first desktop computers, the contents of the screen were managed directly by the CPU. For example, to draw a line segment on the screen, the CPU would run a loop to set the color of each pixel that lies along the line.
Software and Algorithms; Hardware and Technology. The Early '90's. Software and Algorithms; Hardware and Technology. The Middle to Late '90's. Software and Algorithms; Hardware and Technology. The '00's; Ethical Issues; Bibliography. PreHistory. The foundations of computer graphics can be traced to artistic and mathematical ``inventions,'' for ...
15.1 Early Hardware. For a little more than a decade in the beginning of computer graphics history, images were created and displayed as vectors – straight lines connecting points on the screen of a CRT. These displays were “refreshed” from a display list, which was a portion of memory that the display controller accessed to determine ...
- Wayne E. Carlson
- 2017
- What is Computer Graphics?
- Computer Graphics Applications
- Display (Video Display Device)
- C R T
- CRT types
- Vector Scan
- Raster Scan
- Simple Raster Display System
- Graphics Display Processor
- Computer Graphics Software
- A lg o rith m s
- Graphics Rendering Pipeline
Different things in different contexts: pictures, scenes that are generated by a com puter. tools used to make such pictures, software and hardware, input/output devices. the whole field of study that involves these tools and the pictures they produce. Use of computer to define, store, manipulate, interrogat...
Art, entertainm ent, and publishing movie production, animation, special effects computer games World Wide Web Book, magazine design, photo editing CG and Im age processing (syntesis vs. analysis) Sim ulations (education, training) CAD architectural, circuit design etc. Scientific analysis and visualization Graphical U...
ost CG on video monitors Still most popular: Cathode Ray Tube (CRT) Other popular display types: Liquid Crystal Display Plasma display Field Emission Displays Digital Meromirror Devices Light Emitting Diodes 3D display devices (hologram or page scan methods)
electron contact phosphor light fades, required in a small period (refresh)
Direct View Storage Tubes (not CRT, no need for refresh, pictures stored as a perm anent charge on phosphor screen) Calligraphic refresh CRT (line drawing or vector random scan, need refreshing) Raster scan (point by point refreshing) Refresh rate: # of com plete images (fram es) drawn on the screen in 1 ...
Picture definition is stored as a set of line drawing com m ands in a refresh buffer. to display a picture, the system cycles through the set of com m ands in the buffer Designed for line drawing applications (CAD)
● Screen is a regular grid of sam ples called pixels element)
Frame buffer: stored pixel map of screen Video controller just refreshes the frame buffer on the onitor periodically. CPU Peripheral Devices System Bus System Frame Memory Buffer Video Controller Monitor Inexpensive Scan conversion of output prim itives (lines, rectangles etc.) done by the CPU. Slow. As refresh cycle ...
Scan conversion, output prim itives, raster operations (double buffering) ● Separete fram e buffer CPU System Bus Display Processor D. Proc. memory. Frame Buffer Peripheral Devices System Memory Video Controller Monitor
Rendering Primitives Models are composed of, or can be converted to, a large number of geometric primitives. Typical rendering primitives directly supported in hardware include: Points (single pixels) Line segments Polygons (perhaps simple, triangle, rectangle) Modeling primitives include these, but also Piecewise ...
A number of basic algorithm s are needed: Transformation: Convert representations of models/primitives from one coordinate system to another Clipping/Hidden surface removal: remove primitives and part of primitives that are not visible on the display Rasterization: Convert a projected screen space primitive to ...
Rendering: conversion from scene to im age 3D Scene Render 2D Image Scene is represented as a m odel composed of primitives. M odel is generated by a program or input by a user. Im age is drawn on an output device: monitor, printer, m emory, file, video fram e. Device independence. Typically rendering pro...
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18.3 Hardware and Software. In the mid 80’s, Stellar Computer was marketing a graphic supercomputer. To demonstrate the capabilities of their hardware, they developed a software package called Application Visualization System (AVS) that they gave away with the hardware. AVS was one of the first integrated visualization systems, and was ...
- Wayne E. Carlson
- 2017
Jul 12, 2022 · 1973: Richard Shoup produces SuperPaint, a forerunner of modern computer graphic packages, at the Xerox PARC (Palto Alto Research Center) laboratory. 1970s: Ivan Sutherland's student Edwin Catmull becomes one of the pioneers of 3D computer-graphic animation, later playing key roles at Lucasfilm, Pixar, and Disney.
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Feb 1, 2016 · 1992: OpenGL 1.0 - A fixed function pipeline for creating computer graphics. A programmer fed vertex data into the pipeline and out came a 3D rendering. 2004: OpenGL 2.0 - The GPU became programmable. Programmers could write shader programs that were compiled into hardware. Fixed function pipeline programs and shader programs are not compatible.
