Oblique Pictorials Get out your notebooks 2 1

Oblique Pictorials Get out your notebooks. 2. 1 Oblique Pictorials

Learning Objectives • Review Line Conventions and Isometric Drawings. • You will be able to understand the differences between Isometric, Oblique and Perspective drawings • You will understand the differences between Cavalier and Cabinet oblique drawings. • You will be able to create oblique drawings.

Review: Line Conventions Matching 1. 2. 3. 4. 5. 6. 7. 8. 9. Construction Line Hidden Line Object Line Dimension Line Center Line Section Line Short Break Line Extension Line Long Break Line Number 1 -9 in your notebook a) Typically represented as a jagged cut or break b) Defines the center of arcs, circles and symmetrical parts. c) Lightly drawn lines to guide drawing other lines and shapes. d) Show interior detail not visible from the outside of the part. e) Define where material is cut away. f) Shows distance g) Freehand line drawn to show where a part is broken to reveal detail. h) Thick, dark and defines the item. i) Shows where dimension starts and stops.

Order the following lines by Precedence • • Hidden Lines Object Lines Center Lines Cutting Plane Lines

Pictorial Drawing • • 2 D illustration of a 3 D object Shows three faces of an object in one view Provides a realistic view of an object Three types – Isometric – Oblique (Cavalier) – Perspective Oblique (Cabinet) Perspective

Oblique Pictorials • An Oblique pictorial starts with a straight-on view of one of the object’s faces, which is often the front face • Angled, parallel lines are drawn to one side to represent the object’s depth. Common oblique angles include 30°, 45°, and 60° 45°

Oblique Pictorials • Two common types of oblique pictorials: – Cavalier – Cabinet • The difference between the two is how the depth of the object is represented Cavalier Oblique Cabinet Oblique

Oblique Pictorials Object appears deeper than it actually is Cavalier Oblique More realistic view because depth does not appear distorted Cabinet Oblique

Oblique Pictorials Follow along with your worksheet. The following slides show the steps in creating oblique pictorials of the puzzle piece shown below. Imagine a glass box that encloses the entire object.

Oblique Pictorials 1. Sketch a rectangle to represent the overall height and width of “the box” such that height lines are vertical and widths lines are horizontal. This will give a straight on view of the front of the object. Overall Height Overall Width 1) Front Box 2) Add depth 3) Construction Lines: Faces 4) Object Lines: Faces 5) Construction Lines: Inside Object 6) Object Lines: Inside 7) Shading

Oblique Pictorials Overall Depth 2. Complete “the box” by sketching depth lines to the overall depth of the object at a given angle (45 degrees here). Cabinet is drawn half depth Cavalier is drawn full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 3. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box”. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 3. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box”. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 3. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box”. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 4. Use object lines to trace over the construction lines to delineate the edges of the object faces that occur on the visible surfaces of “the box”. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 5. Sketch additional construction lines to identify edges of the object inside of the box. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 6. Trace over construction lines with object lines to delineate the remaining object lines. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials Create the Oblique Cabinet view. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Oblique Pictorials 7. You may use tonal shading to enhance the appearance of the perspective sketch and create a more realistic representation. Cabinet is half depth Cavalier is full depth Cavalier Oblique Cabinet Oblique

Summary: Oblique Construction 1)Front Box 2) Add depth (Cavalier: Full, Cabinet: Half) 3) Construction Lines: Faces 4) Object Lines: Faces 5) Construction Lines: Inside Object 6) Object Lines: Inside 7) Shading

Oblique Pictorials • Examples Interlocking pavement concept Game system controller

Exercises • Complete the 2. 1 Oblique Sketching Practice Worksheet