usb flash drive samsung download

37. From the foregoing explanation of the use and application of a fine and thick line in defining the meaning of an outline drawing, it will not surprise the student to find that an alteration in the position of an object with respect to the light falling upon it may, and possibly will, affect its lining-in. To show the effect of such an alteration in position, let E and P in the diagram Fig. 134 be the elevation and plan of a cube, with four of its faces vertical, and making angles of 45 with the VP. In this position the light falls wholly and directly upon the vertical face Ae Ce, leaving its parallel and opposite one wholly in shade, while the face eB e'D and its opposite one are in the plane of the light. In this case the lining-in of both plan and elevation of the cube becomes quite different to that of the same objects when differently placed with respect to the light falling upon them. As in the previous figure, in elevation, the under side of the cube is assumed to be some distance above the HP, but in plan it is supposed to have that side resting upon it. The correct lining-in of the two views in accordance with their altered position will then be as follows : In elevation, the top front edges Ae, eB, forming one line, being directly in the light, must be a fine line. The vertical edge AC, being "in the plane of the light," must also be a fine line. G 82 FIRST PRINCIPLES OF The edge ee is in the plane of the light, but it being so near to becoming one that would either cast a shadow or be fully in the light, a medium thickness of line would be most appropriate. As the vertical edge BD of the cube would cast a definite shadow on any surface behind it, it must of course be a thick line. The same applies to the two