Screens & 2D Graphics: Crash Course Computer Science

The video explores the evolution of computer graphics, starting with early computing systems like the PDP-1, which used separate devices for text and graphics. It explains the development of CRT technology, vector and raster scanning, and the challenges of memory constraints. The video highlights the role of character generators and the transition to vector graphics, showcasing early applications like Spacewar! and Sketchpad. It concludes with the emergence of bitmapped displays and modern graphics, emphasizing the shift towards interactive computing.

What was a common use for early computer screens?

• Tracking program operations

• Displaying high-resolution images

• Playing video games

• Printing documents

What technology was most influential in early display systems?

• Cathode Ray Tubes

• Light Emitting Diodes

• Liquid Crystal Displays

• Plasma Screens

Why did early computers avoid using pixels?

• They were too expensive

• They consumed too much memory

• They were not invented yet

• They were too slow to render

What was the primary function of a character generator in early computers?

• To generate random numbers

• To convert characters into raster graphics

• To store large amounts of data

• To enhance sound quality

What was a significant limitation of character generators?

• They could only draw text

• They were very slow

• They required too much power

• They could only display numbers

What was the first video game to use vector graphics?

• Pong

• Pac-Man

• Space Invaders

• Spacewar!

What input device did Sketchpad use for interaction?

• Mouse

• Keyboard

• Light pen

• Touch screen

What is a bitmapped display?

• A display that uses only text

• A display where bits in memory map directly to pixels

• A display that uses vector graphics

• A display that cannot show images

What is the purpose of a frame buffer in graphics?

• To hold pixel data for the screen

• To increase processing speed

• To manage network connections

• To store sound data

What advancement did bitmapped graphics bring to computing?

• Faster processing speeds

• Lower power consumption

• Arbitrary graphics rendering

• Improved sound quality