ORTHOGRAPHIC PROJECTION
OK so we know that this website is about orthographic drawing but what is an orthographic drawing and why do we need to draw when designing anything? Is drawing not just for artists who can actually draw?
What is an orthographic drawing?
An orthographic drawing or projection as it is also known is a 2- dimensional drawing of a 3- dimensional object. An orthographic drawing is the final drawing produced by a designer before it is manufactured. On the drawing is the size (dimensions) which are drawn to what we call scale but dont worry we will go over this in more detail later. Orthographic images are drawn in either first or third angle projection. We will only be focusing on the first angle projection in this lesson.
Reminder!
Two dimensional simply is a shape that only has two dimensions (such as width
and height) and no thickness.
Squares, Circles, Triangles, etc are two
dimensional objects.
Three dimensional is an object that has height, width and depth, like
any object in the real world.
Example: your body is
three-dimensional
EXAMPLES OF 2 AND 3 DIMENSIONAL SHAPES
WHAT ARE ORTHOGRAPHIC DRAWING USED FOR?
Orthographic drawings as we know are the last design drawing done by the designer before the product is made. On any orthographic drawing the designer marks on the measurement of each individual part so that when it is sent to be made the manufacturer knows exactly the size to make the product. Orthographic drawings are often referred to as a blueprint drawing for this reason.