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Questions and Answers
What is the purpose of desktop publishing on personal computers?
What is the purpose of desktop publishing on personal computers?
- To create and disseminate information using graphics (correct)
- To create animated movies and cartoon films
- To simulate mathematical models and mechanical systems
- To design components and systems electrical, mechanical, electromechanical, and electronic devices
How does computer-aided drafting use graphics?
How does computer-aided drafting use graphics?
- To produce animated movies and cartoon films
- To design automobile bodies, structures of buildings, airplanes, and computer networks (correct)
- To simulate mathematical models and mechanical systems
- To create artistic pictures for advertising purposes
What is the role of the Graphics Library in the Conceptual Framework for Interactive Graphics?
What is the role of the Graphics Library in the Conceptual Framework for Interactive Graphics?
- It interacts between application and display hardware (correct)
- It assists in drawing straight lines
- It maps application objects to images
- It modifies images based on user interaction
How is a straight line represented through scan-conversion?
How is a straight line represented through scan-conversion?
What is the purpose of the algorithm mentioned for drawing a line using an equation?
What is the purpose of the algorithm mentioned for drawing a line using an equation?
What do organizations typically use desktop publishing for?
What do organizations typically use desktop publishing for?
What is a key advantage of interactive computer graphics?
What is a key advantage of interactive computer graphics?
How does user friendliness contribute to the success of systems using computer graphics?
How does user friendliness contribute to the success of systems using computer graphics?
In what areas is computer graphics commonly used?
In what areas is computer graphics commonly used?
What is the primary purpose of creating 2D and 3D graphics using computer graphics in various organizations?
What is the primary purpose of creating 2D and 3D graphics using computer graphics in various organizations?
How do interactive computer graphics enhance our ability to understand data?
How do interactive computer graphics enhance our ability to understand data?
Why is user friendliness considered crucial in graphical interfaces?
Why is user friendliness considered crucial in graphical interfaces?
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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.
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