Exploring Graphics Primitives and Techniques

What is a Cathode Ray Tube and how does it work?

• A Cathode Ray Tube is a type of LED display.

• A Cathode Ray Tube is a vacuum tube that uses electron beams to create images on a phosphorescent screen.

• A Cathode Ray Tube uses liquid crystals to form images.

• A Cathode Ray Tube is a solid-state device that emits light.

Explain the difference between a Plasma display and a Liquid Crystal display.

• Plasma displays have a longer lifespan than LCDs.

• Plasma displays are more energy-efficient than LCDs.

• Plasma displays use gas cells for light emission, while LCDs use liquid crystals and a backlight.

• LCDs use gas cells for light emission, while Plasma displays use liquid crystals.

List at least three input devices used in computer graphics.

• Mouse, Graphics Tablet, Keyboard

• Printer

• Monitor

• Speaker

What are positioning techniques in input devices?

• Static positioning methods

• Common positioning techniques include relative positioning, absolute positioning, and various tracking methods.

• Gesture-based positioning techniques

• Linear positioning only

Describe the function of potentiometers in input techniques.

• Potentiometers function as variable resistors to control input parameters by adjusting voltage levels.

• Potentiometers serve as fixed resistors to maintain constant voltage levels.

• Potentiometers are primarily used for data storage in electronic devices.

• Potentiometers are used to amplify signals in audio equipment.

What is the purpose of scales and guidelines in graphical applications?

• To eliminate the need for measurements in design.

• To confuse users with inconsistent layouts.

• To create random designs without any structure.

• The purpose of scales and guidelines is to ensure accurate representation and consistency in graphical applications.

Explain the Rubber-Band technique in graphics.

• A way to animate objects by stretching them like a rubber band.

• The Rubber-Band technique is a method for selecting and manipulating objects in graphics by dragging to create a bounding box.

• A technique for applying textures to surfaces in graphics.

• A method for creating 3D models using rubber materials.

What is the significance of vector representation in computer graphics?

• Vector representation is only useful for 3D modeling.

• Vector representation allows for scalable, resolution-independent graphics, enabling precise manipulation and efficient rendering.

• Vector representation limits the ability to manipulate graphics.

• Vector graphics are always pixelated and low quality.

Describe the DDA algorithm for line drawing.

• The DDA algorithm is primarily used for rendering circles and curves.

• The DDA algorithm is an incremental line drawing algorithm that uses the slope to determine the intermediate points between two endpoints.

• The DDA algorithm uses a recursive approach to draw lines.

• The DDA algorithm requires floating-point arithmetic for all calculations.

What is Bresenham's Line algorithm and how does it differ from DDA?

• Bresenham's Line algorithm is primarily used for 3D graphics, while DDA is used for 2D graphics.

• Bresenham's Line algorithm uses floating-point arithmetic, while DDA uses integer arithmetic.

• Bresenham's Line algorithm is more efficient and uses integer arithmetic, while DDA uses floating-point arithmetic.

• DDA is faster than Bresenham's Line algorithm due to its simpler calculations.