Presentation on Parallel projection.pptx
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The document discusses parallel projection, which is a method of representing 3D objects in 2D where all projection lines are parallel. It describes the history of parallel projection dating back to Leonardo da Vinci. The document outlines different types of parallel projections including orthographic, axonometric, and oblique projection. It notes the advantages of parallel projection such as being easy to use and creating accurate images from multiple angles, making it useful for technical drawings.
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ppt.pdf
In parallel projection, coordinate positions are
transformed to the view plane along parallel lines.
In perspective projection, object position are
transformed to the view plane along lines that
converge to a point called projection reference point
(center of projection)
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Ed ass 2013
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- 1. Presentation on Parallel projection Goutam Sharma (171817) Maliha Tanjum (171808)
- 3. Parallel Projection: An Overview Parallel projection is a type of projection used in technical drawing, engineering, and drafting. It is a method of representing three-dimensional objects in two dimensions in which all the projection lines are parallel to each other. HISTORY OF PARALLEL PROJECTION Leonardo da Vinci first developed it in the 15th century. He used it to create sketches of his inventions, and Albrecht Durer and other Renaissance artists later used it. The technique has been used for centuries in engineering, architecture, and other technical fields and is still used today. 3 PARALLEL PROJECTION PARALLEL PROJECTION
- 4. Types of Parallel Projections This type of projection is used to create an image of an object from a single viewpoint, such as the front, top, bottom, or side. ORTHOGRAPHIC PROJECTION This type of projection is used to create an image of an object from an angled viewpoint, and it can be used to create images with perspective. OBLIQUE PROJECTION 4 PARALLEL PROJECTION
- 5. Orthographic Projections PRESENTATION TITLE 5 When the direction of projection is perpendicular (at 90) to the view plane, then the projection is Orthographic Projection. PARALLEL PROJECTION
- 6. Types of Orthographic Projections This type of projection is used to create an image of an object from multiple viewpoints, and it can be used to create images of 3D objects. MULTI-VIEW Axonometric projection is a type of orthographic projection used for creating a pictorial drawing of an object, where the angles between the axis are not foreshortened. AXONOMETRIC 6 PARALLEL PROJECTION
- 7. Types of Axonometric Projections The direction of projection makes equal angles with all of the principal axis. ISOMETRIC The direction of projection makes equal angles with exactly two of the principal axis DI-METRIC 7 TRIMETRIC The direction of projection makes equal angles with exactly three of the principal axis PARALLEL PROJECTION
- 8. Oblique projection 8 Oblique projection is a type of graphical projection used for producing pictorial representations of three-dimensional objects. In this type of projection, the projected view of the object is rotated from the normal side view, so that a three-dimensional view is seen from an angle. This type of projection is used when a more realistic representation of the object is desired, and when the angle of the object is important. Oblique projection is often used in technical illustration and other engineering drawings. PARALLEL PROJECTION
- 9. Types of Oblique Projections The direction of projection is chosen so that there is no fore- shortening of lines perpendicular to the XY-lane. It is achieved by projecting the projectors at the angle of 30 and 40 degree. CAVALIER 9 PARALLEL PROJECTION
- 10. Types of Oblique Projections 10 The direction of projection is chosen so that the line perpendicular to the XY-plane are fore-shortening by half of its length. For cabinet projection, the angle is kept at 63.40 degree. CABINET PARALLEL PROJECTION
- 11. Benefits of Parallel Projection The parallel projection has several advantages over other types of projection. It is easy to use, easy to understand and can be used to create accurate images of objects. Additionally, it can be used to create images from multiple angles, which is helpful for technical drawings. 11 PARALLEL PROJECTION
- 12. Conclusion Parallel projection is a type of projection used in technical drawing and engineering. It is a method of representing three-dimensional objects in two dimensions in which all the projection lines are parallel to each other. There are several types of parallel projection, each with its own benefits. Parallel projection is easy to use and can be used to create accurate images of objects from multiple angles. 12 PARALLEL PROJECTION
- 13. Thank you Goutam Sharma Maliha Tanjum