[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-663079-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-663079-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","unit-6-multi-view-drawing-learning-competencies-basics-of-orthographic-projection","UNIT 6 - MULTI-VIEW DRAWING - Learning Competencies - Basics of Orthographic Projection","","Unit 6 introduces multi-view drawing as conventional projections of three-dimensional objects onto a two-dimensional plane for communicating designs in building, machines, and equipment. It explains projection and distinguishes central (perspective) from parallel projection, then further classifies parallel projection into orthographic and oblique. The unit details orthographic projection, the three principal projection planes, reference lines, and how front, top, and side views are formed. 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Parallel projection assumes the observer is at a large distance, so visual rays become parallel.",{"name":69,"@type":60,"acceptedAnswer":70},"What are the three main planes used in orthographic projection?",{"text":71,"@type":63},"Orthographic projection uses three mutually perpendicular planes: horizontal (top view), frontal (front view), and profile (side view).","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},663079,1793224998,{"code":4,"msg":81,"data":82},"success",[83,87,91,94,99,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":92,"slug":93},70,"exam",{"id":95,"doc_module":4,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},5,"Comic",60,"comic",{"id":100,"doc_module":4,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},6,"Technology",50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":95,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":22,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":79,"read_time":144},962090769052,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","UNIT  \n6  \nMULTI-VIEW DRAWING  \nLearning Competencies:  \nUp on completion of this unit you should be able to:  \n􀀹 Explain the importance of multi-view drawings;  \n􀀹 Define the concept of projection;  \n􀀹 Explain the concept of orthographic projection;  \n􀀹 Identify the three main projection planes;  \n􀀹 Describe the methods of orthographic projection;  \n􀀹 Prepare arranged view with first and third angle projection;  \n􀀹 Identify the six principal views;  \n􀀹 Arrange the six principal views in 1st and 3rd angle projection methods;  \n􀀹 Identify the common dimensions of views;  \n􀀹 Analyze guide lines for orientation and choice of views that most describe an object;  \n􀀹 Lay out one view, two view, and three view drawings;  \n􀀹 Prepare the multi – view drawing of an object;  \n􀀹 Show hidden features of an object;  \n􀀹 Apply the rule of precedence of line in view drawings;  \n􀀹 Identify normal, inclined and oblique surface;  \n􀀹 Apply visualization skills by solid and surface to multi-view drawings.  \n6.1 Introduction  \n• Have you ever seen a building drawn on a blueprint, plan paper? What do you understand from drawing?  \nMulti-view drawings are conventional projections of a three dimensional object on a two dimensional plane. Anything which is going to be produced or constructed is based on the proposal given by multi-view drawings. For example, buildings, machines, office equipments and so on. By this projection convention engineers, architects, draftsman can communicate with each other even if they don’t speak common language. The basic rules and principles of orthographic projection will be discussed on this chapter.  \n6.2 Projection  \nActivity 6.1  \n1. What do you understand from the word projection?  \n2. What do you expect is the thing to be projected?  \n3. What do you think is the destination after projection?  \n6.2.1 Types of projection  \nA projection is a drawing of an object which is three dimensional on a two dimensional surface or plane. The two dimensional surface used for the projection is called plane of projection or the picture plane.  \nThere are different types of projections which are classified depending on:  \n􀂾 The angle the lines of sight (projection line) make with the projection plane,  \n􀂾 The angle the lines of sight make with each other,  \n􀂾 The relative position of the object to be projected with respect to the projection plane.  \nProjection methods are broadly classified into two: Parallel projection and Central projection.  \nIn central projection, the observer is assumed to be located at some finite location. Hence the visual rays projected from the different corners of the object converge to the single point of viewing, this is the actual viewing mechanism and therefore the projection possesses realistic appearance like camera picture. Central projection is commonly called Perspective projection.  \nFig. 6.1 Projection  \nPerspective projection is further classified as linear perspective and aerial perspective. As the observer moves further and further away from the object, the angle between the visual rays reflected from the different corners of the object becomes more and more gentle. If we can therefore place the observer at very large distance from the object we can assume that these visual rays become parallel with each other. Parallel projection is based on the assumption of observer being at large distance without losing the ability to see the object. This assumption will bring about some distortion to the pictorial appearance of the projection as compared to actual appearance.  \nParallel projection is further classified into orthographic and oblique projection. If the lines of sight are parallel to each other and perpendicular to the picture plane, the resulting projection is called an orthographic projection. If the lines of sight are parallel to each other but inclined to the picture plane, the resulting projection is called an oblique projection. Orthographic projection is further classified into multi-","cbCainIUCABSS6s7","https://ap.wps.com/l/cbCainIUCABSS6s7","pdf",2578849,31,"English","# UNIT 6 MULTI-VIEW DRAWING\n## Learning Competencies\n## Introduction\n## Projection\n### Types of projection\n## Orthographic Projection\n### Planes of Projection\n### First Angle Projection","[{\"question\":\"What are multi-view drawings used for in technical communication?\",\"answer\":\"Multi-view drawings provide conventional projections of a three-dimensional object onto a two-dimensional plane so engineers, architects, and draftsmen can communicate designs clearly even without a shared language.\"},{\"question\":\"How is central (perspective) projection different from parallel projection?\",\"answer\":\"In central projection, observers are assumed at a finite location and visual rays converge to a single viewing point, creating a realistic camera-like appearance. Parallel projection assumes the observer is at a large distance, so visual rays become parallel.\"},{\"question\":\"What are the three main planes used in orthographic projection?\",\"answer\":\"Orthographic projection uses three mutually perpendicular planes: horizontal (top view), frontal (front view), and profile (side view).\"}]","UNIT 6 - MULTI-VIEW DRAWING - Learning Competencies - Basics of Orthographic Projection | PDF",78]