So I'm going to go back to our home menu and I'm going to I'm going to select the polyline.
Okay.
Now, let's just draw by eye roughly.
I'm going to draw a region like that.
Okay.
So if we were to try and hatch this, this is open.
This doesn't the ends don't meet.
So we've got an open area here.
So let's look at hatching again and we'll select this diagonal line.
Okay.
Now I'm going to go select.
I'm going to select that object and you can see what it does.
It kind of.
This is all okay, but where?
It's got an opening.
It just.
It'll kind of ignore that line.
It'll just go from here to there.
And it what it's done basically is create a diagonal line between these two points and just fill in
that area, which you're probably never going to want to do.
So if I undo that, you always want and I'll do this with a simple fill it.
You always want to make sure your areas are closed off.
And now when we select a hatch, we'll do that again.
You can see we get this nice trimmed out corner there.
So try to always close the boundary line.
Okay, now let me delete that.
If this was in fact, I'll do that and I'll show you a solid hatch.
So a solid hatch.
Which we've seen before.
If I was to select this line here and right click, it just wouldn't do it.
Okay.
Whereas with a pattern, it can kind of bridge this a solid hatch.
It's just going to it's just going to leak through it.
It's imagine if you were trying to fill this with paint in the real world, it's just going to pour
out.
Think of it that way.
That's an easy way to think of it.
So if ever you do a solid hatch and it just won't work such as that, that kind of is a clue that you've
probably got an opening in your line somewhere and to look around and just make sure it's all closed
out.
Okay.
So if I close that again by filleting it and there was this other option under hatch, so as well as
select an object to hatch it.
Okay, we can have pick points.
So what pick points allows you to do?
It's just saying fill this area.
So rather than select the object, I can just click inside an area and it will hatch it.
Okay.
Now a thing to remember with this method it requires.
This is very simple.
This is a very simple join.
It's a simple object.
If you've got a complex drawing, maybe an architectural layout or a mechanical layout, lots of things
going on.
You've got text, you've got lines.
AutoCAD has to actually analyze that and say, Where will he want this?
What does he want filling?
And it's actually more complicated than you think.
Although you might know this is just a room outline to AutoCAD.
It's just a line.
So it has to go for an analyze.
And if you've got a complex drawing, this can be quite resource hungry and it can use quite a bit of
memory.
It can even cause crashes if it's a large drawing.
I just I don't really like using this anymore.
I prefer to actually draw a boundary if there's not one already, I can use and use the select command.
Okay.
But pick points.
That's how it works.
You basically just so if I was let me demonstrate if I had some circles.
Like that.
Okay.
And I was to hatch.
If I was to select that circle, it's going to hatch all the circle.
Okay.
This is where pick points will come in handy if maybe you didn't want this middle part.
If you select pick points, it's going to select the enclosed area and it will count that line as part
of the enclosure.
Okay.
So maybe you just want it to hatch where these overlapped.
So that's where you would use pick points over select.
But usually you would want to hatch an enclosed area, in which case I tend to use the select option.
Now, one thing you can do with Hatch, which does come in very handy, is you can trim, you can use
the trim command on a hatch.
So if I was to do a solid hatch.
Actually, let's do a line hatch and select this object.
Actually, I didn't want this portion hatched.
Okay.
I wanted it.
I wanted just this one.
I should have used pick points, but maybe I didn't.
Or maybe it was a complex join and pick points would have would have messed up AutoCAD.
It might have.
It's too resource hungry.
There's lots going on in my drawing.
For whatever reason, I didn't use pick points, but now I want to get rid of this hatched area.
You can just use a trim command and like you do with a line.
We'll select the object to trim right click or enter and then select the hatch and it will trim that
hatch out.
So.
You can use trim on a hatch you can't use extend on it.
That's asking a bit too much.
That would be that would be a nightmare.
And it would certainly if it did work, it would certainly crash most drawings, but you can use trim
and yeah, that's that's pretty much the basics of hatch.
The rest you will there's not much else to learn, but the rest you'll learn just by using it.
But the other things to note about Hatch is we have this associative hatch option.
So what does that mean?
Well, if I was to.
If I was to change, if I've hatched this object here and now, that object changes.
It stands to reason the hatch usually would want to change with it.
So if I click this rectangle and I use the grips, I just left click and I drag it, Let's turn off
or off.
Maybe that's up there.
You'll see the hatch moves with it as well.
And the reason that hatch is moved with it is because it's associative.
Okay, so if I was to create another hatch.
And I turn this associative command off.
There.
And now I'm going to move this rectangle.
You'll see the hatch doesn't move with it.
But what you do get with a non associative hatch is you can click the hatch and you get grips for the
actual hatch itself.
So.
You can always edit the hatch separately.
And you can also do more with it.
And it's just standard grips you'll get if it was with a rectangle.
So you don't get those grips with an associative hatch because it's tied to the grips of the object.
So really, it depends what you're doing.
Most cases I'd say you want it associative, but sometimes you might want your hatch to be different.
If you've done it associative and you want to change it, you can just select the hatch, go up here
and click that and it will turn that associativity off.
And you'll see now we've got grips for our hatch.
Okay.
You can't then turn it back on because once you've once you've kind of untied that, it's gone.
But you can switch it also, you could right click go to properties and a lot of that stuff you can
change under the normal properties box, including associative.
So associative.
Yes, you can just change that to No.
Okay.
There you go.
So that's hatch.
That's the basics.
Again, have a play about with it, get used to those commands.
But just putting it into practice in other chapters, you'll it will soon become second nature.