 # What Is The Projection Line?

## How do you find the projection of a line?

If a line is perpendicular to a plane, its projection is a point.

The intersection point with the plane and its direction vector s will be coincident with the normal vector N of the plane.

If a line is parallel with a plane then it will be parallel with its projection onto the plane..

## What is projection line in engineering drawing?

PROJECTION OF LINES SH 1132 Engineering Graphics F.Y. B. Tech. CLASS B: Line parallel to (or in) one reference plane & inclined to other two planes (1) Line parallel to ( or in) V.P. & inclined to H.P. by . (2) Line parallel to ( or in) H.P. & inclined to V.P. by .

## What is the object line?

A visible line, or object line is a thick continuous line, used to outline the visible edges or contours of an object. Hidden Line. A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen.

## How do you find orthogonal projection?

We denote the closest vector to x on W by x W .To say that x W is the closest vector to x on W means that the difference x − x W is orthogonal to the vectors in W :In other words, if x W ⊥ = x − x W , then we have x = x W + x W ⊥ , where x W is in W and x W ⊥ is in W ⊥ .More items…

## What is the projection of straight line?

Straight lines in special positions A line parallel to the horizontal plane Π1 is called horizontal (level) line and all its points have the same distance to the horizontal plane, i.e. have the same z-coordinate. Therefore, the vertical projection of that line is parallel to the ground line x.

## What is projection types of projection?

Projection are defined as mapping of three-dimensional points to a two-dimensional plane. There are two type of projection parallel and perspective. 1. … Parallel Projection use to display picture in its true shape and size. When projectors are perpendicular to view plane then is called orthographic projection.

## What is projection line in civil engineering?

The figure or view formed by joining, in correct sequence, the points at which these lines meet the plane is called the Projection of the object. The lines or rays drawn from the object to the plane are called Projectors. The transparent plane on which the projections are drawn is known as Plane of Projection.

## What is the orthogonal projection of point?

1. Introduction. Orthogonal projection of a point is the process of finding a point on a curve or a surface such that the vector connecting the point in space and the point on the curve or the surface becomes perpendicular to the curve or the surface.

## What is a projection point?

The projection of a point is its shadow on the paper sheet. The shadow of a point on the paper sheet is this point itself (idempotency). … The projection parallel to a direction D, onto a plane or parallel projection: The image of a point P is the intersection with the plane of the line parallel to D passing through P.

## What are the 3 planes of projection?

[FIGURE 3-2] Projections of the point are made onto three of the surfaces that make up the box: the top or “H” (horizontal) plane, the front or “F” (frontal) plane, and the right side or “P” (profile) plane.