File talk:Orthographic.svg

I was under the impression that 3rd angle / orthographic projection rotated the object in the opposite direction to your example.

Here's a random example that I pulled off google images: http://www.tpub.com/content/engineering/14069/img/14069_162_6.jpg

Our tech drawing teacher used to say, imagine you've got half a water melon sat on top of your subject (with the wet side facing up!). The nut, bolt, wuffle valve, whatever, always needs to point to the centre as you move it into its 90deg projected positions.

Another way of looking at it may be imagining that the subject is at the end of a pendulum. As it is moved to its 90deg projected position, it still needs to point at the fulcrum point.


 * This image is at Commons. Please post comments on the discussion page there. -- Adrignola talk contribs 16:29, 6 February 2010 (UTC)

MY MISTAKE, SORRY, I WAS DESCRIBING 3RD ANG PROJECTION, IMAGE IS 1ST ANG