Join Shaun Bryant for an in-depth discussion in this video Drawing circles, arcs, and polygons, part of Cert Prep: AutoCAD Certified Professional (2015).
- One of the basic drawing skills that you will need to know for your AutoCAD certification, is the ability to draw circles, arcs, and polygons. Now we're in the two basic drawing skills house drawing. I'm using the completed one because what I'm going to do is, as I work through this particular section of the course, I'm going to save each part so that you have a fully completed drawing, as well as the exercise file that you will download from the lynda.com website.
So we're in the model tab, and we're going to zoom in on the foyer area here of the house. So let's zoom in, just use the mouse wheel. And there's the foyer and there's the double doors there to get into the foyer of the house itself. Now zoom in nice and tight so that you can see those double doors there. The first thing we're going to do is we're going to check our layer. Now our layer should be landscaping for this particular drawing. You can do that on the home tab up here. Click on the home tab, over to the layers panel and you can see the current layer there is landscaping.
Make sure it is, because we're going to place some landscaping in the entrance area here. Now the first thing going to do is look at the circle command. So again in the home tab on the ribbon, we go up to the draw panel and here's the circle command. Click on the fly up there. You can see that we have numerous methods of drawing circles. Now you've got center radius, center diameter, we've got a two-point circle, three-point circle, tan tan radius, and tan tan tan.
We're going to utilize the center diameter circle, like so. So I'm going to click there like that, center diameter. And I'm going to place a center point for the circle. Now this is going to represent some plant pots, outside the front door of this particular house. So I'm just going to pick a point about here like so. And I'm going to specify the diameter of the circle and it's going to be 12 inches. So I press enter and there's my circle there. Now one of the neat tricks with the circle command now, is I can come over here and I can right click, I can repeat the circle command and just pick a center point now like so.
Just press enter and it will remember the last radius or diameter I used. So that's a really neat trick there with the circle command. Now let's have a look now at the arc command. Again it's on the draw panel here. We're going to click here on the down arrow and there's lots of different ways of drawing arcs. Now all of these have a particular format. So the three-point is just a standard, continuous three-point arc. You've then got start center, so you've got start center and start center angle and so on.
Then you've got start end angle, start end direction, and then you've got ones beginning with the center. The center start end, center start angle. Now they're all different combinations to allow you to utilize your object snaps in the AutoCAD drawing itself. I'm just going to go for the nice, simple one here. Start, center, end, like so. I'm going to click and come into the drawing area. You'll notice I've got dynamic input switched on, which makes my life 100 times easier because the prompts will come up on the crosshair even though I can read them down there on the command line as well.
Now I'm going to utilize the door opening, the doorstep. And we're going to place a little bit of landscaping that makes it look like we've got a semi-circle to step onto as we step into the building. So I'm going to zoom in a little bit and I'm going to slide this end-point snap here like so. Then the center of the arc, will be the mid-point of that line. Then I come the other end-point like so and I click a third time. Start, center, end. And if I zoom out now, I've got a nice pretty landscape, kind of area which emphasizes the door there as you go into the building.
And these would represent some plants. Now obviously you might place those more accurately using your object snaps. Now something else you might utilize is the polygon command. You might place some nice hexagonal stepping stones coming away from this bit of landscaping. So again we go to the draw panel and we go up here and you'll see a little fly next to the rectangle there. We want polygon like so. I come into the drawing area, prompts you for the number of sides. Now the number of sides that you can have in any polygon in AutoCAD, is anything from 3 up to 1,024 sides.
Now we only need 6, we're going for a hexagon like so. I'm going to press enter. Now you'll be prompted for the center of the polygon. I'm going to pick a little point just about there like that. And then it will ask you for the options. You can have an inscribed polygon which is inside a circle or a circumscribed polygon, which is about the circle with the circle inside the polygon. You'll notice there is also the option here on the screen to select them as well on the dynamic input. I'm just going to go for inscribed in circle.
As I drag the mouse, can you see my little hexagonal, stepping stone appears. Now if I follow that, can you see I'm using the polo tracking there, it keeps it nice and level. So it's nice a horizontal. Now what I'm going to do there is I'm going to specify the radius of my circle, which is going to be 1 ft. like so or 12 inches. Press enter and there's my stepping stone and then what I might do there is I'll just pan up a little bit. If I select that particular polygon now like so. I'll just use copy so I'll right click, copy selection on the shortcut menu, pick a point.
Let's go for that mid-point there. I'll just drag a few of these down to create that little sort of stepping stone path. Let's say to there like so. I'll juts hit escape a couple times. Obviously you would continue that, making the path go around the building landscaping it effectively. So there's three of the basic drawing skills. The circle command, the arc command, and the polygon command. And all you've got to do there is utilize those commands for your AutoCAD professional certification.
- Creating and publishing AutoCAD files
- Drawing shapes and lines
- Creating isometric drawings
- Transforming objects
- Creating and using arrays
- Organizing objects and layers
- Reusing content with blocks
- Adding text, dimensions, multileaders, and scales
- Creating layouts
- Setting printing and plotting options
Skill Level Appropriate for all
Q: Is this certification available for AutoCAD for Mac users?
A: AutoCAD certification is on the Windows environment only. Currently Autodesk does not have plans for an AutoCAD for Mac certification.
Q: This course was updated on 02/01/2016. What changed?
A: We added four new videos to the "Certification: What Is It?" chapter. These tutorials cover Certiport, the online certification service that now offers a variety of Autodesk certifications.