Orthographic Projection

Understanding what is first and third angle orthographic projection.

Overview : http://metal.brightcookie.com/2_draw/draw_t3/htm/draw3_2_3.htm
First Angle : http://metal.brightcookie.com/2_draw/draw_t3/htm/draw3_2_4.htm
Third Angle : http://metal.brightcookie.com/2_draw/draw_t3/htm/draw3_2_5.htm