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So I'm going to go back to our home menu and I'm going to I'm going to select the polyline.

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Okay.

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Now, let's just draw by eye roughly.

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I'm going to draw a region like that.

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Okay.

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So if we were to try and hatch this, this is open.

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This doesn't the ends don't meet.

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So we've got an open area here.

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So let's look at hatching again and we'll select this diagonal line.

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Okay.

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Now I'm going to go select.

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I'm going to select that object and you can see what it does.

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It kind of.

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This is all okay, but where?

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It's got an opening.

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It just.

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It'll kind of ignore that line.

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It'll just go from here to there.

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And it what it's done basically is create a diagonal line between these two points and just fill in

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that area, which you're probably never going to want to do.

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So if I undo that, you always want and I'll do this with a simple fill it.

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You always want to make sure your areas are closed off.

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And now when we select a hatch, we'll do that again.

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You can see we get this nice trimmed out corner there.

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So try to always close the boundary line.

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Okay, now let me delete that.

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If this was in fact, I'll do that and I'll show you a solid hatch.

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So a solid hatch.

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Which we've seen before.

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If I was to select this line here and right click, it just wouldn't do it.

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Okay.

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00:01:52,000 --> 00:01:55,000
Whereas with a pattern, it can kind of bridge this a solid hatch.

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00:01:56,000 --> 00:01:58,000
It's just going to it's just going to leak through it.

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00:01:58,000 --> 00:02:02,000
It's imagine if you were trying to fill this with paint in the real world, it's just going to pour

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00:02:02,000 --> 00:02:02,000
out.

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Think of it that way.

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00:02:03,000 --> 00:02:04,000
That's an easy way to think of it.

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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

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probably got an opening in your line somewhere and to look around and just make sure it's all closed

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00:02:16,000 --> 00:02:16,000
out.

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00:02:16,000 --> 00:02:17,000
Okay.

42
00:02:22,000 --> 00:02:28,000
So if I close that again by filleting it and there was this other option under hatch, so as well as

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00:02:28,000 --> 00:02:30,000
select an object to hatch it.

44
00:02:30,000 --> 00:02:35,000
Okay, we can have pick points.

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00:02:35,000 --> 00:02:38,000
So what pick points allows you to do?

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00:02:38,000 --> 00:02:40,000
It's just saying fill this area.

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00:02:41,000 --> 00:02:46,000
So rather than select the object, I can just click inside an area and it will hatch it.

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00:02:47,000 --> 00:02:47,000
Okay.

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00:02:48,000 --> 00:02:54,000
Now a thing to remember with this method it requires.

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00:02:54,000 --> 00:02:55,000
This is very simple.

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00:02:55,000 --> 00:02:56,000
This is a very simple join.

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00:02:56,000 --> 00:02:57,000
It's a simple object.

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00:02:57,000 --> 00:03:03,000
If you've got a complex drawing, maybe an architectural layout or a mechanical layout, lots of things

54
00:03:03,000 --> 00:03:03,000
going on.

55
00:03:03,000 --> 00:03:04,000
You've got text, you've got lines.

56
00:03:05,000 --> 00:03:09,000
AutoCAD has to actually analyze that and say, Where will he want this?

57
00:03:09,000 --> 00:03:10,000
What does he want filling?

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00:03:10,000 --> 00:03:13,000
And it's actually more complicated than you think.

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00:03:13,000 --> 00:03:16,000
Although you might know this is just a room outline to AutoCAD.

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It's just a line.

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00:03:18,000 --> 00:03:19,000
So it has to go for an analyze.

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00:03:19,000 --> 00:03:26,000
And if you've got a complex drawing, this can be quite resource hungry and it can use quite a bit of

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memory.

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00:03:27,000 --> 00:03:29,000
It can even cause crashes if it's a large drawing.

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00:03:29,000 --> 00:03:32,000
I just I don't really like using this anymore.

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00:03:32,000 --> 00:03:38,000
I prefer to actually draw a boundary if there's not one already, I can use and use the select command.

67
00:03:38,000 --> 00:03:39,000
Okay.

68
00:03:39,000 --> 00:03:40,000
But pick points.

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00:03:40,000 --> 00:03:41,000
That's how it works.

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00:03:41,000 --> 00:03:46,000
You basically just so if I was let me demonstrate if I had some circles.

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00:03:48,000 --> 00:03:49,000
Like that.

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00:03:49,000 --> 00:03:50,000
Okay.

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00:03:50,000 --> 00:03:52,000
And I was to hatch.

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00:03:52,000 --> 00:03:57,000
If I was to select that circle, it's going to hatch all the circle.

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00:03:58,000 --> 00:03:58,000
Okay.

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00:03:59,000 --> 00:04:03,000
This is where pick points will come in handy if maybe you didn't want this middle part.

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00:04:05,000 --> 00:04:11,000
If you select pick points, it's going to select the enclosed area and it will count that line as part

78
00:04:11,000 --> 00:04:12,000
of the enclosure.

79
00:04:13,000 --> 00:04:13,000
Okay.

80
00:04:15,000 --> 00:04:19,000
So maybe you just want it to hatch where these overlapped.

81
00:04:19,000 --> 00:04:22,000
So that's where you would use pick points over select.

82
00:04:26,000 --> 00:04:33,000
But usually you would want to hatch an enclosed area, in which case I tend to use the select option.

83
00:04:34,000 --> 00:04:42,000
Now, one thing you can do with Hatch, which does come in very handy, is you can trim, you can use

84
00:04:42,000 --> 00:04:44,000
the trim command on a hatch.

85
00:04:45,000 --> 00:04:48,000
So if I was to do a solid hatch.

86
00:04:48,000 --> 00:04:53,000
Actually, let's do a line hatch and select this object.

87
00:04:54,000 --> 00:04:56,000
Actually, I didn't want this portion hatched.

88
00:04:56,000 --> 00:04:57,000
Okay.

89
00:04:57,000 --> 00:04:58,000
I wanted it.

90
00:04:59,000 --> 00:05:00,000
I wanted just this one.

91
00:05:00,000 --> 00:05:02,000
I should have used pick points, but maybe I didn't.

92
00:05:02,000 --> 00:05:06,000
Or maybe it was a complex join and pick points would have would have messed up AutoCAD.

93
00:05:06,000 --> 00:05:07,000
It might have.

94
00:05:07,000 --> 00:05:08,000
It's too resource hungry.

95
00:05:08,000 --> 00:05:10,000
There's lots going on in my drawing.

96
00:05:10,000 --> 00:05:15,000
For whatever reason, I didn't use pick points, but now I want to get rid of this hatched area.

97
00:05:15,000 --> 00:05:19,000
You can just use a trim command and like you do with a line.

98
00:05:19,000 --> 00:05:26,000
We'll select the object to trim right click or enter and then select the hatch and it will trim that

99
00:05:26,000 --> 00:05:27,000
hatch out.

100
00:05:27,000 --> 00:05:28,000
So.

101
00:05:29,000 --> 00:05:31,000
You can use trim on a hatch you can't use extend on it.

102
00:05:31,000 --> 00:05:33,000
That's asking a bit too much.

103
00:05:33,000 --> 00:05:35,000
That would be that would be a nightmare.

104
00:05:35,000 --> 00:05:40,000
And it would certainly if it did work, it would certainly crash most drawings, but you can use trim

105
00:05:42,000 --> 00:05:47,000
and yeah, that's that's pretty much the basics of hatch.

106
00:05:47,000 --> 00:05:52,000
The rest you will there's not much else to learn, but the rest you'll learn just by using it.

107
00:05:52,000 --> 00:05:58,000
But the other things to note about Hatch is we have this associative hatch option.

108
00:06:00,000 --> 00:06:02,000
So what does that mean?

109
00:06:02,000 --> 00:06:03,000
Well, if I was to.

110
00:06:05,000 --> 00:06:10,000
If I was to change, if I've hatched this object here and now, that object changes.

111
00:06:11,000 --> 00:06:15,000
It stands to reason the hatch usually would want to change with it.

112
00:06:15,000 --> 00:06:22,000
So if I click this rectangle and I use the grips, I just left click and I drag it, Let's turn off

113
00:06:22,000 --> 00:06:23,000
or off.

114
00:06:23,000 --> 00:06:24,000
Maybe that's up there.

115
00:06:24,000 --> 00:06:26,000
You'll see the hatch moves with it as well.

116
00:06:27,000 --> 00:06:30,000
And the reason that hatch is moved with it is because it's associative.

117
00:06:32,000 --> 00:06:36,000
Okay, so if I was to create another hatch.

118
00:06:38,000 --> 00:06:41,000
And I turn this associative command off.

119
00:06:44,000 --> 00:06:44,000
There.

120
00:06:47,000 --> 00:06:49,000
And now I'm going to move this rectangle.

121
00:06:49,000 --> 00:06:52,000
You'll see the hatch doesn't move with it.

122
00:06:53,000 --> 00:06:59,000
But what you do get with a non associative hatch is you can click the hatch and you get grips for the

123
00:06:59,000 --> 00:07:00,000
actual hatch itself.

124
00:07:00,000 --> 00:07:01,000
So.

125
00:07:02,000 --> 00:07:06,000
You can always edit the hatch separately.

126
00:07:09,000 --> 00:07:11,000
And you can also do more with it.

127
00:07:12,000 --> 00:07:15,000
And it's just standard grips you'll get if it was with a rectangle.

128
00:07:15,000 --> 00:07:21,000
So you don't get those grips with an associative hatch because it's tied to the grips of the object.

129
00:07:21,000 --> 00:07:24,000
So really, it depends what you're doing.

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00:07:24,000 --> 00:07:32,000
Most cases I'd say you want it associative, but sometimes you might want your hatch to be different.

131
00:07:32,000 --> 00:07:38,000
If you've done it associative and you want to change it, you can just select the hatch, go up here

132
00:07:39,000 --> 00:07:41,000
and click that and it will turn that associativity off.

133
00:07:41,000 --> 00:07:44,000
And you'll see now we've got grips for our hatch.

134
00:07:44,000 --> 00:07:45,000
Okay.

135
00:07:47,000 --> 00:07:54,000
You can't then turn it back on because once you've once you've kind of untied that, it's gone.

136
00:07:54,000 --> 00:08:01,000
But you can switch it also, you could right click go to properties and a lot of that stuff you can

137
00:08:01,000 --> 00:08:04,000
change under the normal properties box, including associative.

138
00:08:04,000 --> 00:08:05,000
So associative.

139
00:08:05,000 --> 00:08:07,000
Yes, you can just change that to No.

140
00:08:07,000 --> 00:08:08,000
Okay.

141
00:08:10,000 --> 00:08:11,000
There you go.

142
00:08:15,000 --> 00:08:16,000
So that's hatch.

143
00:08:16,000 --> 00:08:17,000
That's the basics.

144
00:08:17,000 --> 00:08:19,000
Again, have a play about with it, get used to those commands.

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00:08:19,000 --> 00:08:24,000
But just putting it into practice in other chapters, you'll it will soon become second nature.