ELI5: Explain Like I'm 5

Orthographic projection

Imagine you are very good at drawing pictures of things, and someone asks you to draw a house. But instead of drawing it from the angle you normally see houses, they ask you to draw it from the top, as if you were looking down on it from the sky. This is what we call an orthographic projection.

Orthographic projection is a way of drawing 3D objects on a flat piece of paper or screen. You draw the object as if you are looking at it from different angles all at once. This makes it easier to see and understand how an object looks from different viewpoints without having to move around it physically.

To create an orthographic projection drawing, you first choose the shape you want to draw. Then, you imagine different planes cutting through it at different angles. Each of these planes represents a different viewpoint that you will draw as a flat shape on your page.

For example, if you wanted to draw a cube, you would imagine planes cutting through it from the front, the top, and the side. Then you would draw each of these viewpoints as 2D shapes on your page. When you put all the shapes together, you would have a drawing of the cube in orthographic projection.

Orthographic projection helps engineers, architects, and designers create detailed drawings that can be used to build things like buildings, cars, and machines. It also helps us visualize how objects can be assembled or disassembled, or how they will look from different viewpoints.