User:Shila Regmi/Teaching Lesson Plan 24

Subject: Computer Graphics

Period: Fourth

Topic: Three Dimensional Graphics

Teaching Item: Polygon Rendering Methods: Constant, Gouraud and Phong Shading

Class: BICTE 6th Semester

Unit: Five

Time: 50min

No. of Students: 18

Specific Objectives:

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

• understand Gouraud and Phong shading methods and how they affect the rendering of polygons in computer graphics.
• differentiate between Constant, Gouraud and Phong Shading.

Instruction Materials:

Daily usages materials.

PowerPoint slide.

Multimedia Projector

Laptop

Teaching Learning Activities

I will start the lesson by asking students what they know about shading. Encourage them to share their thoughts and experiences.

Begin by introducing Gouraud shading as an improvement over Constant shading, where colors are interpolated across vertices and then across the polygon's surface.

I will show how Gouraud shading creates smoother shading transitions compared to Constant shading.

Demonstrate Gouraud shading using examples through presentation slide.

Discuss the limitations of Gouraud shading, such as its inability to handle specular highlights well.

Introduce Phong shading as a more advanced shading method that calculates shading at each pixel rather than just at vertices.

Explain how Phong shading takes into account surface normals and light reflection models to produce more realistic results.

Demonstrate Phong shading using examples through presentation slide.

Discuss the advantages of Phong shading, such as its ability to handle specular highlights and produce more accurate lighting effects.

I will ask students if they have any confusion related to today topic and at last i will summarize the lesson in brief.

Assessment

• How does Gouraud shading differ from Phong shading in terms of the computation of pixel colors in a rendered image?
• Describe the process of Gouraud shading and how it interpolates colors across polygons.
• Explain the concept of Phong shading and how it calculates pixel colors by considering surface normals and light reflection models.

Evaluation

• Compare and contrast the handling of specular highlights in Gouraud shading versus Phong shading.