determining the area of a hatch (2-D)

[scubasteve1218]

Hey all,

I've been using CAD for a few years now, and I still cannot figure out this problem. Essentially, I have an odd shape that I fill in with a hatching. SOMETIMES, it will give me the area in the properties window (or when I use the list command). but other times, it will not give me the area.

 

I just hatched 4 different (but same general shape) areas, and on 3 of them CAD was able to compute the area, but not the 4th hatched area.

 

I created all 4 hatches using the exact same steps, so I'm not sure what I could be doing wrong. The CAD Tech at the office cant seem to figure it out either, Any ideas on whats goin on here? Thanks in advance

[alanjt]

I came across this error when a user tried using my area of hatch lisp routine. The hatches just didn't have the area property. We never figured it out.

[Cad64]

Can you post the drawing with the 4 hatches so we can take a look?

[scubasteve1218]

Bridge Layout.dwg

 

 

There are several overlapping hatched areas, but its the one in the bottom right corner that I cannot figure out the area.

[SLW210]

How are you selecting the area to be hatched?

[scubasteve1218]

entering the hatch command, selecting the 3 or 4 sides of my boundary, and clicking okay.

 

Did the same process to make all the hatches on that dwg.

[Cad64]

You've got something funky going on with that hatch. I copied it and moved it over to the side and then did a Hatch Edit and chose to recreate the boundary. When the new boundary was created, I noticed something very strange. You can see it in the screenshot below. The extra geometry at the end. I believe that's what's causing this problem. I re-hatched the closed boundary by picking an internal point and now the area shows up in the Properties palette.

[scubasteve1218]

So I should select an internal point instead of selecting the boundary lines? Thanks, I'll try it at work in the morning

[bjenk8100]

If im planning on hatching, I always make sure its a poly line, even if i have to move stuff around and pedit. Then just type area, right click and then select object.