TYPES.ppt
- 1. PREPARED BY: EMERSON JOHN C. ROSETE
- 2. The term orthographic came from the Greek words "orthos and graphos" which means straight line drawing ORTHOGRAPHIC PROJECTION Is the method of representing the exact shape of an object into two or more views of planes generally at right angles or 90 degree to each other by extending perpendicular from the object to the plane. 8/4/2023
- 3. 1. FRONTAL PLANE: this shows the shape of the object when view from the front. This is known as the front view of an object. 2. HORIZONTAL PLANE: this shows the appearance of the object as if viewed directly above and shows the distance from front to rear.This is known as the top view of an object. 3. PROFILE PLANE: this profile shows the shape of an object when viewed from the side. This is known as the side view of an object. 8/4/2023
- 4. EXAMPLE :
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- 6. ISOMETRIC DRAWING Is a drawing wherein the object is represented by the three side seen in one time. It is made with 30x60 degree triangle. It is also a three dimensional drawing because height, width and depth are all drawn in a single plane. Box method is the starting point for all isometric drawing. Example: 8/4/2023
- 7. PRINCIPAL DIMENSIONS WIDTH - is the measurement of an object taken from the side to side of an object. HEIGHT - is the measurement taken from top to bottom of an object.
- 8. PICTORIAL DRAWING Are drawings that show objects as they would appear in a reality. It is also a drawing that shows more than one side of the object. TYPES OF PICTORIAL DRAWING AXONOMETRIC DRAWING - has the object turned so that the three faces are viewed simultaneously. DEPTH - is the measurement from front to rear of an object.
- 9. THE AXONOMETRIC POSITION ISOMETRIC - is another way of presenting design /drawings in three dimensions. The example opposite has been drawn with 30 degree set square. DIMETRIC - as a way of drawing an object so that one axis has a different scale than the other two axis in the drawing.
- 10. TRIMETRIC - the projection of the three angles between the axes are unequal. Have one plane parallel to the picture plane which is the same size as the orthographic view. TYPES: CAVALIER - an oblique projection with lines of projection at a 45-degree angle to the plane of projection. CABINET - an oblique projection in mechanical drawing in which dimensions parallel to the third axis of the object are shortened one half to overcome apparent distortion. OBLIQUE DRAWING
- 11. EXAMPLE :
- 12. PERSPECTIVE DRAWING object are drawn smaller as their distance from the observer increases. The lines of an object are aligned to 1,2 or 3 vanishing point. TYPES OF PERSPECTIVE DRAWING PARALLEL OR ONE POINT PERSPECTIVE : is a drawing method that shows how things appear to get smalleras they get further away , converging towards a single vanishing pointon the horizon line.
- 13. ANGULAR OR TWO POINT PERSPECTIVE Linear perspective in which parallel lines along the width and depth of an object are represented as meeting at two separate point on the horizon that are 90 degrees apart as measured from the common intersection of the line projection.
- 14. 1. What is the greek words of orthographic? A.Orthos and graphos B. erthos and graphs C. ortho and graphs 2.It is the method of representing the exact shape of an object into two or more views of plane? A.orthographic projection B. isometric drawing C. projection
- 15. 3.It is the drawing where in the object is represented by the three side seen in one time? A.orthographic drawing B. isometric drawing C. projection 4.It is the principles of dimension that measures an object from side to side of the object? A.width B.height C. depth
- 16. 5. Types of pictorial drawing that the three faces are viewed simultaneously? A.axonometric drawing B.pictorial drawing C. perspective drawing TRUE OR FALSE 1.Cavalier is a type of oblique drawing.
- 17. 2.Angular perspective is also called one point perspective. 3.One point perspective have two vanishing point. 4.Trimetric is a projection of the three angles between the axes are equal. 5.Cavalier is a line of projection at a 45 degree angle to the plane of projection.
- 18. 1. A 2. A 3. B 4. A 5. A 1. T 2. F 3. F 4. T 5. T