Lesson Notes By Weeks and Term - Senior Secondary 2

TERM – 2^ND TERM

WEEK SIX - SEVEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: PERSPECTIVE DRAWINGS

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Describe perspective projection.

II.) Identify the types of perspective drawing.

III.) Use the term of perspective drawing in constructions.

IV.) Construct objects in perspective projection.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

PERSPECTIVE DRAWINGS

Perspective drawing creates the illusion of depth in a drawing by making objects appear smaller as they move further away, giving them a three-dimensional and realistic look. It involves establishing a horizon line, typically implied, opposite the viewer's eye, representing objects infinitely far away. In perspective drawing, distant parts of objects such as buildings or roads taper to a point, mimicking how they appear to an observer. This technique makes distant objects appear smaller than their actual sizes.

In perspective drawing, several terms are important to understand:

1. Horizon Lines: These are imaginary horizontal lines, sometimes called eye level, that divide the viewer's line of vision when looking straight ahead. They determine the extent of the viewer's visibility based on the terrain and the viewer's distance from the ground.
2. Vanishing Point: This is the point on the horizon line where the angular perspective lines of an object, if extended, would eventually converge. The position of the vanishing point affects the perspective of the drawing; for example, if it's set to the right, the drawing will appear as if the viewer's point of view is shifted to the left of the objects.
3. Orthogonal Lines: These are straight lines drawn at an angle from the edges of objects, extending back into expected distant space until they converge at a point on the horizon line.

Types of Perspective Drawing:

There are two types of perspective drawing namely:

1. One-Point Perspective Drawing:

In one-point perspective drawing, the four parallel edges of a cube or cuboid converge at a particular point known as the vanishing point. This technique is commonly employed when the object's front is directly facing the viewer. In this type of drawing, the horizontal and vertical lines will appear horizontal and vertical respectively, and lines moving farther from the viewer will gradually angle towards the vanishing point.

Uses

One-point perspective is frequently used in scenarios where the object's front is visible to the viewer. It ensures that the horizontal and vertical lines in the drawing align with their respective orientations, and lines extending towards the distance converge at a single vanishing point.

2. Two-Point Perspective Drawing:

In two-point perspective drawing, there are two vanishing points, each representing the point where parallel lines converge in two different directions. This method is employed when the corners of objects are facing the viewer, making it ideal for drawing isometric objects.

Uses

Two-point perspective, also known as perspective with two vanishing points, is utilized when the viewer's perspective includes the corners of objects. It allows for the accurate depiction of objects with angular dimensions, ensuring that parallel lines converge towards their respective vanishing points in two different directions.

EVALUATION: 1.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively