So up to this point we have seen many simple 2D geometries in Autocad for example line polyline circles
and ellipses.
There is also a different kind of geometry in Autocad which is called region and you can make region
using the completely closed geometries.
So let's make simple geometry easier.
I'll make geometry with this circle tool.
And another one with this rectangle also make a geometry using this line command here.
Now in this case if you select these geometries you will see the normal grips and also the behavior
of this object will be off our polyline because it's made up off of polyline.
Now if you select the circle here also we have the simple grips you can modify these objects like this
using these groups and its behavior will be very much similar to that of a circle.
In this case obviously we have these separate lines so you can select them and their behavior will be
something like that of a line.
Now once we convert these objects into region their behavior will completely change.
And in order to convert it into region you can use its Kamandi equivalent RGGI or in that region or
you can go to this draw panel expanded hand-selected region too.
Now also look at this region too.
And now this circle and press enter.
So now this object has been converted into a region.
Although we still have the circle just right behind this.
But we now have a new object also here.
Now here in this case we have a simple polyline let's can work this one into also a region so I select
the region and click on this and press enter.
We again have a new region here now.
Alkon where this object into a region in this case you can see that we can select it separately.
Let's go to Region 2 and select all of these objects and press enter.
Now when I move my code so you can see that we have a region here has seen on the tooltip and the complete
Geometry will be selected.
So in all of these three cases we had completely closed geometry.
That's why I was able to convert them into region and that's one of the conditions which needs to be
fulfilled for converting an object into a region.
OK so now we have the regions.
Let's look at the difference here.
So I also like this object and obviously it's like the region and I'll simply move it from this point
so I select the group and move it here.
Now that's the region and this is simple line geometry which we initially had on this case gives the
object will behave as a rigid geometry as you can see that I can move it directly using my grips.
Even in this case I have this region and if I move it I can simply move using my grips.
It's completely rigid shape.
But in this case the original rectangle if you move it with these clips it will deform.
It will stretch and it will behave accordingly.
So that's one of the differences.
Now the difference between a region and a common geometry is the ability to perform boolean operations.
So I'll explain it in a moment for that I'll just clean this area so I have this region also as select
the circle and as separate this region.
Now I'll remove all of these geometries.
They are no longer required.
Now we have this circle which is a region.
And also this rectangle which is a region.
Now I'll move them one over another and this overlapping position just like this.
And let's make three copies.
So good copy too.
And the second copy and put copy.
Now all of these objects are made with a region.
Now let's select the union to the first boolean operation.
So I will type union and press ENTER NOW you need to select the first object and the second object and
press enter.
And look at the geometry now.
So both these geometries now combined and they combine to form a single region like this which is a
completely rigid sheep just like this.
OK now let's type subtract and press enter.
So that's the second boolean operation.
Now first subtract you need to first select the object which you want to retain.
In this case we want to retain this object.
Press enter.
Now click on the object which you want to subtract.
Now in this case when I select a rectangle this portion the Coman portion of rectangle in circle will
be subtracted.
And also the remaining part of the rectangle will be raised so that selected press enter.
And here we have it.
Now this part has been removed and also the remaining object has been removed because we selected the
circle initially.
Now let's reverse the process.
I'll press control Z and I'll type subtract again.
And now in this case I select this rectangle first.
Now press enter.
Select the circle and you obviously know what will happen this time.
Here we have it.
The circle will be removed from this rectangle.
District angle or region.
Now in this case I use the third boolean operation which is intersect.
So let's type intersect.
Now in this case only the common portion of intersecting geometries will be retained.
So I select the first object the second one both of them are regions.
Press enter and we only have the common region from both of these geometries.
So in this way we can use the Boolean operations on the region objects and that's all about the region
too.