Vertical Trace A vertical trace is a line that is projected from the intersection point of two or more rays of projection onto a transparent or opaque sheet....
A vertical trace is a line that is projected from the intersection point of two or more rays of projection onto a transparent or opaque sheet. The point at which these rays intersect the sheet is called the point of intersection.
The vertical trace is an extension of the line of sight from the point of intersection to the edge of the projection sheet. It helps us determine the position of the object on the projection sheet.
How it's used:
The vertical trace can be used to locate the position of an object on a projection sheet, given its location in the real world.
It can also be used to determine the size and position of an object on the projection sheet.
By comparing the vertical trace to the actual image, we can determine the position of the object in the real world.
Examples:
A vertical line through the intersection point of two rays of projection is called the image vertical.
The vertical trace of a point on the projection sheet will pass through the corresponding point on the real world.
A vertical line projected from a point on the projection sheet will intersect the sheet at one point only