This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ... 44. Special Cases of the Right Line.--Before proceeding further with the discussion, it is desired to call the attention of the student to a number of special cases of the right line, as these well fixed in mind enable one to recognize the accuracy of a perspective at a glance, and in the execution of a drawing to ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ... 44. Special Cases of the Right Line.--Before proceeding further with the discussion, it is desired to call the attention of the student to a number of special cases of the right line, as these well fixed in mind enable one to recognize the accuracy of a perspective at a glance, and in the execution of a drawing to greatly expedite the labor of construction. These "helps" or "aids" are as follows: 1. Every system of parallel lines, unless parallel to the picture plane, has a common vanishing-point. (Section 36.) 2. The perspective of a line which is parallel to the picture plane is parallel to the line itself. (See Fig. 66.) If the line is parallel to both planes of projection--a horizontal line parallel with the picture plane--its perspective is a line which is parallel with the ground-line, as witness the line 1-5 in Fig. 65. If the line is perpendicular to the horizontal plane and parallel to the picture plane, its perspective is a line which is perpendicular to the ground-line. (See Fig. 67.) 3. The perspective of a line or point which is in the picture plane is the line or point itself; that is, such a perspective would be "full-size." 45. The Plan and Elevation Moved from the Field of the Picture.--By referring to Fig. 65, which shows the plan and elevation in projection and in their assumed position with reference to the picture plane, one remarks the apparent confusion of lines, and can readily imagine the real confusion which would occur in a more complex perspective, as the perspective of a house if it were drawn in a similar manner. To minimize this confusion of lines the plan and elevation are separated--no longer in projection--and are removed from the field of the picture and arranged and used as follows: Let Fig....
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Add this copy of Advanced Mechanical Drawing: A Text for Engineering to cart. $16.27, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Advanced Mechanical Drawing: A Text for Engineering to cart. $26.62, new condition, Sold by Ria Christie Books rated 4.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Advanced Mechanical Drawing: A Text for Engineering to cart. $27.44, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Advanced Mechanical Drawing: A Text for Engineering to cart. $39.71, new condition, Sold by Ria Christie Books rated 4.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
