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형상의 표현방법 (투상법) METHODS OF SHAPE DESCRIPTION (projection)

Lesson 5

투상법

제 3 각법

투상도 표현

Freehand sketch

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형상의 표현 방법

3D Objects must be represented on flat paper(2D) in such a manner that the exact shape can be understood easily

How we can do this?

Draw a number of separate views of the object as seen from different positions, then arrange those views in a systematic manner

Projection views (투상법)

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PROJECTION (투상법)

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PROJECTION (투상법)

Projection system(투상법)

Perspective Projection(투시투상)

Parallel Projection(평행투상)

Orthographic Projection(수직투상)

Oblique Projection(사투상)

Multiview Projection(정투상)

Axonometric Projection(축측투상)

1st, 2nd, 3rd, 4th angle(일, 이, 삼, 사각법)

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PROJECTION (투상법)

Projection system(투상법)

Perspective Projection(투시투상)

Parallel Projection(평행투상)

Orthographic Projection(수직투상)

Oblique Projection(사투상)

Multiview Projection(정투상)

Axonometric Projection(축측투상)

1st, 2nd, 3rd, 4th angle(일, 이, 삼, 사각법)

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PROJECTION (투상법)

Projection system(투상법)

Perspective Projection(투시투상)

Parallel Projection(평행투상)

Orthographic Projection(수직투상)

Oblique Projection(사투상)

Multiview Projection(정투상)

Axonometric Projection(축측투상)

1st, 2nd, 3rd, 4th angle(일, 이, 삼, 사각법)

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PROJECTION (투상법)

Projection system(투상법)

Perspective Projection(투시투상)

Parallel Projection(평행투상)

Orthographic Projection(수직투상)

Oblique Projection(사투상)

Multiview Projection(정투상)

Axonometric Projection(축측투상)

1st, 2nd, 3rd, 4th angle(일, 이, 삼, 사각법)

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PROJECTION (투상법)

Projection system(투상법)

Perspective Projection(투시투상)

Parallel Projection(평행투상)

Orthographic Projection(수직투상)

Oblique Projection(사투상)

Multiview Projection(정투상)

Axonometric Projection(축측투상)

1st, 2nd, 3rd, 4th angle(일, 이, 삼, 사각법)

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ORTHOGRAPHIC PROJECTION(수직투상)

The principles of orthographic projection can be applied in four different "angles" or systems; 1st, 2nd, 3rd, 4th angle projection.

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Comparison between 3rd and 1st angle projection

1각법 : 눈 – 물체 – 화면

3각법 : 눈 – 화면 – 물체

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THIRD ANGLE PROJECTION

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THIRD ANGLE PROJECTION

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Comparison between 3rd and 1st angle projection

제 3 각법

제 1 각법

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LINE TYPES IN PROJECTION VIEWS

Solid Line

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Dashed Line

LINE TYPES IN PROJECTION VIEWS

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Center Line

Dimension Line

LINE TYPES IN PROJECTION VIEWS

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SELECTION OF VIEWS IN PROJECTION

Selection of views

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NUMBER OF VIEWS IN PROJECTION

One view drawing

Except for complex objects of irregular shape, it is seldom necessary to draw more than three views.

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Two view drawing

NUMBER OF VIEWS IN PROJECTION

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Three view drawing

NUMBER OF VIEWS IN PROJECTION

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Devices for freehand sketch: pencil and eraser because freehand sketch is for fast communication

Freehand sketch example

FREEHAND SKETCH

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FREEHAND SKETCH TECHNIQUE

반지름이 작은 원의 스케치 반지름이 큰 원의 스케치

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FREEHAND SKETCH TECHNIQUE

직사각형법을 응용한 투상도 스케치

직사각형법을 이용한 비례위치 찾기

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FREEHAND SKETCH FOR ISOMETIC VIEWS

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FREEHAND SKETCH FOR PROJECTION VIEWS

투상도를 스케치하는 순서

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QUIZ

< 평면도 >

< 정면도 > < 측면도 >

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QUIZ

< 평면도 >

< 정면도 > < 측면도 >

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FREEHAND SKETCH HOME WORKS

브래킷 링크