Sketching

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# Sketching - PowerPoint PPT Presentation

Sketching. 2.00 Explain and demonstrate basic sketching skills and techniques. Sketching Concepts. 2.01 Explain the concepts related to sketching. Purpose of a Sketch. Quickly & easily get an idea on paper Design sketches Freehand technical sketches Technical illustrations.

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## PowerPoint Slideshow about 'Sketching' - lexine

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Presentation Transcript

### Sketching

2.00

Explain and demonstrate basic sketching skills and techniques.

### Sketching Concepts

2.01

Explain the concepts related to sketching.

Purpose of a Sketch
• Quickly & easily get an idea on paper
• Design sketches
• Freehand technical sketches
• Technical illustrations
Paper

Pencil

Optional

Eraser

Grid Paper

Sketching Materials
Sketching Technique
• Proportion
• Clarity
• Sketching Aids
Sketching Lines
• Vertical lines
• Top to bottom
• Long straight lines
• Series of short straight lines
Sketching Circles & Arcs
• Begin by lightly constructing a square
Sketching Angles
• Begin with 90°angle

45°

60°

30°

Subdivide once

Subdivide twice

### Sketching

2.02

Explain the concepts and principles underlying isometric, oblique and multiview sketching.

Sketching
• Types of Sketches
• Single-view
• Multi-view
• Pictorials
Single-view Sketching
• Technical purposes
• Front view
• Most descriptive features
Multi-view Sketching
• Technical sketch
• Front view
• Top view
• Side view

TOP VIEW

FRONT VIEW

R. SIDE VIEW

Multi-view Sketch
Pictorial Sketches
• Quickly communicate an idea
• Three dimensions in one view
• Width
• Height
• Depth
Pictorial Sketches
• Three (3) types
• Isometric
• Oblique
• Perspective
Isometric Sketch

HEIGHT

WIDTH

DEPTH

Isometric Sketching
• Three equally spaced axes of 120°
Isometric Sketching
• Receding lines
• Typically 30° off horizontal
Isometric Sketching
• Circular shapes appear as ellipses
Isometric Ellipses
• Correct ellipse orientation
Isometric Sketching
• Non-Isometric lines
• Locate endpoints and connect
Oblique Sketch

HEIGHT

DEPTH

WIDTH

Oblique Sketching
• Front view is drawn true shape and size
Oblique Sketching
• Receding edges are usually drawn at an angle of 30°, 45°, or 60°
Oblique Sketching
• Circles and curves drawn on frontal plane will appear true shape and size
Perspective Sketches

1-Point Perspective

2-Point Perspective

Perspective Sketches
• Objects appear as the eye would see them
• Most realistic type of pictorial sketch
• Most difficult pictorial sketch to draw