- We're staying in our drawing accurately .DWG file.
And you can see I've done a little bit of zooming
and panning, and you can still see the original rectangle
that we drew earlier using grid and snap.
I've just zoomed in and out a little bit here
because what I want to do is make sure
that you are near a particular coordinate.
Now, in my case,
that coordinate is going to be 2000, 2000.
Now, what you might want to do is start drafting
from when you're zoomed out a little bit like this,
so that you can see where that 2000, 2000 starts.
Just roll back on the wheel if you notice,
if you need to do that.
And we're going to look
at how we draw now accurately with coordinates in AutoCAD.
You'll notice there's an X and a Y
in the bottom left corner of the drawing.
That indicates that Y going upwards is a positive value,
X going to the right is also a positive value,
and the X and Y intersect at an origin zero, zero.
So I can actually type in coordinates
of where I want my object to be and where I want it to go.
Coordinates can be positive or negative.
So Y positive is going upwards,
X to the right positive again,
and then Y going downwards would be negative,
X going to the left would be negative,
it's just a directional thing.
So we're going to draw another rectangle,
so we're staying on the object's layer like so,
and we're also going to use the line command again.
But before we do that, just come down
to the status bar and switch off this one here, snap mode,
you don't want to keep snapping to the grid.
And then what we're going to do
is we're just going to use coordinates only,
so leave the grid on
and you'll notice that polar tracking is off,
object snap tracking's off, object snaps are off.
I'm going to use coordinates only
to draw this particular rectangle,
and the rectangle will be the same size
as the one we've already got on the screen.
So, what we're going to do
is we're going to go up to the line command,
click on the line command and come into the drawing area.
Now, as soon as I do this,
you'll notice when I move the crosshair around,
can you see I'm getting a coordinate readout,
next to specify first point on the dynamic input.
In those two boxes we're going to type in 2000,
and then a comma as if you're typing a coordinate,
and it takes you to the box there,
another 2000 in that box there, like so.
So what you're doing there is you're saying to AutoCAD,
I want my first point of my line to be
at X equals 2000, Y equals 2000,
but you are just typing 2000, 2000.
When you press enter,
you should see a line that's starting
at one of the grid squares like that.
Can you see that?
And then all you need to do get the crosshair
about where mine is.
Can you see I've got little angled line there,
and just zoom in a bit,
and maybe pan a little if you need to,
up a bit so that you can see where you're drawing.
And then you'll notice
we're kind of back to that point where that rectangle was
at the beginning of this exercise.
So with a little bit of zooming and panning,
which you can do when you are inside a command,
it just allows you to get in closer to see the detail.
Now, we're going to utilize coordinates
to draw the rest of this.
So I'm going to now go to the right here.
Now, you'll notice as I drag,
I can't drag it exactly to anything.
That's because all my drafting settings are off
like polar tracking object, snap tracking.
But what I can do is just start typing.
So you need to type the at symbol like that,
and that will automatically on the dynamic input,
prompt AutoCAD to think he's typing in
distances, coordinates, angles.
You'll notice there at the moment, it's trying to do a line
at that length an angle of 23 degrees.
That's because our east zero degrees,
remember we set that in the units,
is going off to the right.
So I'm going to type in a distance
that I want to go horizontally
to the right along the X axis,
so that will be positive 500.
Then I do the comma again, as if I'm typing a coordinate,
and it prompts me now for obviously the Y value,
I'm going to put in zero, like so, so at 500, 0.
And that is from the 2000, 2000 start point,
because I've put an at in,
it's a relative coordinate from the last point.
So when I press enter now,
you'll see that I've got a line
that is 2000, 2000 at the start point,
and then it's 500 long going along horizontally
because there's no value in the Y direction,
that at 500, zero.
So now I want to go upwards, how do I do that?
Well, what I can do there is instead of using a coordinate,
I can use what is called a polar coordinate.
So again, it's an at, like so,
250, like so,
then you're going to use the less than symbol.
And as soon as you do that, can you see,
it takes you to an angle input
with a little red angle there.
And I want to go vertically upwards.
So if zero to the right is east,
if I'm going vertically upwards
that's counterclockwise from the east,
so it's going to be a positive angle
and it's going to be 90 degrees.
Remember angles, also positive, negative.
A positive angle value will be counterclockwise,
a negative angle value will be clockwise.
So I'm telling AutoCAD now that I want to go
at 250 units upwards at 90 degrees.
When I press enter,
you'll see there's my little vertical line
coming in again like so.
Now, if I want to go to the left horizontally,
I'm going to need to put in a negative value for the X value.
So all I've got to do here is just,
always a good idea to move your mouse
in the direction you want to go as well
so you can kind of see where you're going, right?
So I'm going to type at again,
but this time I'm going to the left,
so it's going to be -500 along the X axis, zero on the Y axis,
press enter.
And you'll see there that I've gone exactly 500
along to the left and zero upwards in the Y direction.
And then all I've got to do is a right click and a close
which goes back to the original point where I started.
So see, I've drawn the same rectangle
but I've used coordinates in this case to do it,
also polar coordinates with that 90 degree going upwards
on the right-hand side.