Projection

Projection can refer to different concepts depending on the context.

In mathematics, projection usually refers to the process of mapping a point or a set of points onto another space or a lower-dimensional subspace. This could involve projecting points from higher dimensions to lower dimensions, or projecting points onto a plane or a line.

There are different types of projections, such as orthogonal projection, which is the projection of a point onto a line or a plane at right angles (taking the shortest distance); and perspective projection, which is used in visual arts and computer graphics to create a realistic representation of a three-dimensional object on a two-dimensional surface, like a canvas or a screen.

To compute a projection, you need to know the specific rules or formulas for the type of projection you are trying to perform. For example, in 2D orthogonal projection onto a line, you would typically find the nearest point on the line to the given point by calculating its orthogonal projection.

If you have a specific use case or question related to projection, please provide more details so that I can help you further.