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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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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 Soft lead 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
Object Steps for Single-view Sketching Step 2 Step 1 Step 3 Step 4
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