The image obtained on the plane/screen is as shown. If any imaginary transparent plane is introduced such that the object is in between the observer and the Pictorial drawing however has photographic reali sm. The form is unreal in that weĭon not see an object as it is drawn orthographically. Orthographic Projection is the standard drawing form of the industrial world. The front surface F of the block is seen in its true shape and s ize. The rays will now be parallel toĮach other and perpendicular in both the front surface of the object and the plane, when the observer is at aįinite distance from the object, the rays converge to the eye as in the case of Perspective Projection.
Imagine that the observer looks at the object form an infinite distance.
Isometric projection gives true shape of the object, while Perspective and Oblique Projections do not. The general shape and details of the object, but no its true dimensions or sizes. The Pictorial projections have the advantage of conveying an immediate impression of The projection in which the description of the object is completely understood in one view is known as The transparent plane on which the projections are drawn is known as plane of projectors. The lines or rays drawn from the object to the plane are called projectors. (It is obvious that the outlines of the shadow arc the projections of an The figure or view formed by joining, in correct sequence, the points at which these lines meet the plane
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