Stereography, or a Compleat Body of Perspective, in All Its Branches in VII Books

Stereography, or a Compleat Body of Perspective, in All Its Branches in VII Books

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1738 edition. Excerpt: ...Line of the Point m being a Line in this Plane, its Original is therefore parallel to the Plane of the Projection, and consequently its Va-nishing Point x is also the Vanishing Point of the Projectiorx E. I. This corresponds to Meth. 5. Case I. and the. Demonstration is much the same. METHOD 6. F' 428. Through rz the lntersection of Sp with LM draw nI, and its Direction bcitg N'. _8. transferred to m' in the Picture, it will be parallel to the Projcction R x For Sp being the Directing Line of the Projecting Plane, 72 is the Directing Pfflssffl of the Intersection of that Plane with the Plane FFGH, which lntetsection isthe Project-ion required, and nI being the Director of that lntersection, it is therefortpfllallel to its Image. E_. I., S C H O L._ This corresponds to Meth. 6, and 7. Case r. which here become the same; seeing a Plane passing through the Projecting Point and: zhe Directing Lime of either of thc PWNS Ffgb Of EFGH, must be the same with the Direebing Plane in-whicl the Foin" ' 5 iS hese suPPoied TO be; and Bthc. Directing Point of the Projcction of rctz may be taken as the imaginary Projection of. the Directin Point p of that Line-so that if be ZWP-SP determines 71, and consequently rzl t e-Director of the Projectlo I n be given, the (ame Line Sp by its, Intersection with LM gives p the Directing Pfflfflz an? consequently In the Director of the Line to be projected; And hence 31. Lssisss m Fhc Plane i' 35 Whibh have parallel Images, and consequently the sfflc 7 itecting Point, Wlll alsohave parallel-Projections, and 'vice 'versi ss-_ coa i' w. La. r an n d itrss-w-IF a i? x.IfflMH, ... a Sect. I. (Zfls/ Fzgzzres on a given Plane. z 25. c o a. The Directing Plane may be here brought into the Picturc, by placing the Point...
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Product details

  • Paperback | 332 pages
  • 189 x 246 x 18mm | 594g
  • United States
  • English
  • black & white illustrations
  • 1236784073
  • 9781236784070