This is the same box. Who would havethought from the first picture that there was ahole going through it. This is why we usedifferent line types to show “change indirection”.
Visible, Hidden and Center linesvisible – are continuous lines used to depict edges directly visible froma particular angle.hidden – are short-dashed lines that may be used to represent edges thatare not directly visible.center – are alternately long- and short-dashed lines that may be used torepresent the axes of circular features. Visible line Hidden line Center line Top View Isometric View
This is a top view of an object. 4Top View 4 Is this object a 4x4 box? Lets look at the front view to give us another prospective.
As you see this object is more complex that it first appeared. Thevisible line should have been your first clue. Visible line Top View Front ViewWhat have we learned so far? 1) Objects are not always what they seem. 2) That objects can not be clearly understood without different line types and with just one view.
6 Principle ViewsThere are six principal views in a multi-view orthographicprojection. These are the front, back, top, bottom, and left-and right-side views.
Principal DimensionsThe three principal dimensions of an object are width,height, and depth. Now that we are familiar with the different views and the principal dimensions, lets look at some examples.
What dimension can we get from the front view? Front View
What dims can we get from the top view? Top View
Now since we have an idea of the 6principle views and the 3 principledimensions lets drive-in and seehow well you have it.