huangyhg

descriptive geometry
does the cad systems do descriptive geometry as we had to do manually years ago?
which cad system?
by "descriptive geometry" i assume you mean the construction or witness lines used to create alternative views of an object?
if so, then i don't know of any cad system that does that automatically. why would they need to? are you looking for the artistic effect? any cad system would be able to easily create the construction lines manually.

i agree with cbl.
are you currently using cad?
also, you may want to red-flag your other thread. you entered it twice.
chris
solidworks/pdmworks 08 3.1
autocad 08; catia v5
with 3d modeling, there is no reason for a cad system to do descriptive geometry. it is my understanding that the purpose of descriptive geometry is to manually develop various projected views. if you need to show examples of how views are developed using descriptve geometry, you will have to place your desired views and manually add the witness or construction lines.
the ambassador and the general were briefing me on the - the vast majority of iraqis want to live in a peaceful, free world. and we will find these people and we will bring them to justice."fff"> - george bush, washington dc, 27 october, 2003

i used descriptive geometry back in 1955 to determine if the tubing around a rocket motor would run into other tubing. i'm just wondering if there is a need for drafters and designer to take a class on this subject these days.
maybe a fairly brief explanation but any cad which incorporates 3d modelling to generate the drawing views probably removes the need for a detailed class.
on the other hand, if they're stuck doing 2d then maybe it's of use.
kenat,
i don't know if classes exist on the subject anymore, but if there is it wouldn't hurt to take it. it's not needed though for cad.
chris
solidworks/pdmworks 08 3.1
autocad 08; catia v5
while it is an essential skill to have for manual or 2d drafting, drafting boards seem to be going the way of the buggy whip. personally, think it is a worthwhile subject of study, but i don't think that there is much demand for it in today's design environment. though if we wake up one day and everyones computers don't work, it will be a valuable skill to have.
the ambassador and the general were briefing me on the - the vast majority of iraqis want to live in a peaceful, free world. and we will find these people and we will bring them to justice."fff"> - george bush, washington dc, 27 october, 2003

ewh,
that has happened to me a lot. i wake up and the stupid computer doesn't work!
...then it's back to the drawing board!

chris
solidworks/pdmworks 08 3.1
autocad 08; catia v5
whitmiregt,
most cad systems offer an option to use a grid when sketching in the 3d model and the 2d drawing. the grid lines could effectively be used to do what you are asking.

descriptive geometry was the graphical method of developing a "true shape" view--i.e. a view perpendicular to the surface--that is not an orthogonal view. with solid modeling it is about as useful as using trigonometry to find an angle or a length. the computer does it faster.

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