User:Shila Regmi/Teaching Lesson Plan 20

Subject : Computer Graphics

Period: Fourth

Topic: Three Dimensional Graphics

Teaching Item: Visible Surface Detection Methods: Object Space (Depth Sorting) and Image Space (Z-Buffer, A-Buffer and Scanline) Methods

Class: BICTE 6th Semester

Unit: Five

Time: 50min

No. of Students: 17

Specific Objectives:

At the end of this lesson, students will be able to:

• comprehend the principles and techniques of image space methods (Z-buffer, A-buffer, and Scanline).
• understand the advantages, limitations, and practical applications of each method.
  

Instruction Materials:

Daily usages materials.

PowerPoint slide.

Multimedia Projector

Laptop

Teaching Learning Activities

Enter the classroom, and motivate students before starting the lesson for their concentration on the lesson, and then write todays topic on the board.

Begin the class by asking some questions to students related to today's topic.

Open the presentation slide, I will Introduce image space methods, including Z-buffer, A-buffer, and Scanline.

Explain how Z-buffer works: storing depth values for each pixel and comparing them during rendering.

Discuss the A-buffer method, which stores multiple values per pixel for more complex scenes.

Explain the Scanline method, which processes one scanline at a time, determining visible surfaces pixel by pixel.

Ask students some questions to know what they understand after the completion of the explanation and where they get confused.

Summarize the lesson in brief, clearing students confusion too.

Assessment

• Explain the concept of Image Space visible surface detection methods.

Evaluation

• Describe the working principle of the Z-Buffer algorithm. How does it handle visible surface detection, and what are its advantages over other methods.
• Compare and contrast the A-Buffer method with the Z-Buffer method. What are the key differences between these two image space techniques, and in what scenarios would each be preferred?
• Discuss the process of visible surface detection using the Scanline algorithm. How does Scanline rasterization determine the visibility of surfaces, and what are its limitations compared to buffer-based methods like Z-Buffer?