12 Questions
What is the purpose of desktop publishing on personal computers?
To create and disseminate information using graphics
How does computer-aided drafting use graphics?
To design automobile bodies, structures of buildings, airplanes, and computer networks
What is the role of the Graphics Library in the Conceptual Framework for Interactive Graphics?
It interacts between application and display hardware
How is a straight line represented through scan-conversion?
As a sequence of pixels by calculating x, y values between two endpoints
What is the purpose of the algorithm mentioned for drawing a line using an equation?
To calculate the slope of the line
What do organizations typically use desktop publishing for?
In-house creation and dissemination of documents
What is a key advantage of interactive computer graphics?
Lower analysis and design cost
How does user friendliness contribute to the success of systems using computer graphics?
It enhances interaction between users and computers
In what areas is computer graphics commonly used?
Industry, business, government organizations, education, and entertainment
What is the primary purpose of creating 2D and 3D graphics using computer graphics in various organizations?
To create informative visual representations for decision making
How do interactive computer graphics enhance our ability to understand data?
By allowing users to make changes to the produced image
Why is user friendliness considered crucial in graphical interfaces?
To promote attractive and easy interaction between users and computers
Study Notes
Introduction to Computer Graphics and Interactive Graphics
- Interactive computer graphics allow users to have control over the picture and make changes to the produced image.
- It requires two-way communication between the computer and the user.
- Advantages of interactive graphics include:
- Higher quality
- More precise results
- Greater productivity
- Lower analysis and design cost
- Enhances ability to understand data and perceive trends
Applications of Computer Graphics
- Computer graphics is widely used in various areas, including:
- Industry
- Business
- Government organizations
- Education
- Entertainment
- Home
- Computer graphics is used to create 2D and 3D graphics of mathematical, physical, and economic functions in the form of histograms, bars, and pie charts.
- These graphs and charts are useful for decision making.
Conceptual Framework for Interactive Graphics
- The conceptual framework consists of:
- Graphics Library
- Application Program
- Graphics System
- Modifications to images are the result of user interaction.
Scan Converting a Straight Line
- A straight line can be defined by two endpoints and an equation.
- The equation of the line is used to determine the x, y coordinates of all the points that lie between the two endpoints.
- The algorithm for drawing a line using the equation is:
- Declare variables x1, x2, y1, y2, dx, dy, m, b
- Enter values of x1, x2, y1, y2
- Calculate dx = x2 - x1
- Calculate dy = y2 - y1
- Calculate m = dy / dx
- Calculate b = y1 - mx1
- Scan-convert the calculated x, y values to represent the line as a sequence of pixels.
Explore the advantages of interactive computer graphics and how users can manipulate images through controls. Learn about the higher quality and flexibility offered by interactive graphics in computer systems.
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