CAD2011教程之drawing_objects

Tutorial 3: Drawing Objects

in AutoCAD 2011

Audience: Users new to AutoCAD

Prerequisites: None

Time to complete: 15 minutes

In This Tutorial

Please complete the lessons in this tutorial in order. The earlier lessons include

information that is needed in the later lessons. In this tutorial, you learn how

to do the following:

NOTE For more information on the topics covered in this tutorial, see the AutoCAD

User’s Guide.

■Specify drafting settings

■Draw a circle

■Draw a polygon inscribed in a circle

■Apply a hatch pattern to a closed boundary

■Draw an arc

■Draw a polyline

1

Tutorial Files

Download the tutorial files as follows:

1Download the drawing_objects.zip file from

https://www.wendangku.net/doc/a83126332.html,/autocad-tutorials.

2Unzip drawing_objects.zip to C:\My Documents\Tutorials.

Lesson 1: Specify Drafting Settings

1To open AutoCAD, click Start menu (Windows) ? (All) Programs ?Autodesk ? AutoCAD 2011? AutoCAD 2011- English. The AutoCAD

window opens with an empty drawing file named Drawing1.dwg.

2Check the status bar to make sure you are in the 2D Drafting &

Annotation workspace.

3To complete subsequent lessons in this tutorial, you must specify some drafting settings. Right-click the Object Snap icon in the status bar at the

bottom of the window, and select Settings.

4The Drafting Settings dialog box is displayed. In the Object Snap tab, make sure the Object Snap On option is selected. Also, select Endpoint,

Midpoint, and Center for the Object Snap modes. Make sure the other

options are not selected. Select OK.

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Lesson 2: Draw a Circle

In this lesson, you learn how to draw a circle by specifying the center point

and radius.

To draw a circle

1With Drawing1.dwg open, on the ribbon, click Home tab ? Draw panel

? Circle drop-down menu ?Center, Radius.

2Drag the crosshairs cursor down to the drawing area.

3Click the left mouse button to specify the center of the circle.

4The dynamic input prompt asks you to “Specify radius of circle.” Enter

3.25 from the keyboard and press the Enter key to create a circle with a

radius of 3.25.

Lesson 2: Draw a Circle | 3

5Click ? Save and save drawing as circle.dwg to your desktop. You will use this file in Lesson 3.

Lesson 3: Draw a Polygon

A polygon is an equilateral closed polyline with between 3 and 1024 sides.

Creating polygons is a simple way to draw equilateral triangles, squares,

pentagons, and hexagons.

In this lesson, you learn how to create a polygon inscribed in a circle.

To draw a polygon

1On the ribbon, click Home tab ? Draw panel ?? Polygon.

2Drag the cursor down to the drawing area. In the dynamic prompt, use the keyboard to enter 6 to specify the number of sides of the polygon.

Press Enter.

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3The dynamic prompt changes to “Specify center of polygon.” Move the cursor inside the circle to find its center point. Click when you see the green circle and the dynamic cursor “center,” which indicates the center of the circle.

NOTE If the colored circle does not appear, make sure the drafting settings are set as described in Lesson 1.

4The dynamic prompt changes to “Enter an option” and you have a choice of two options. Click the Inscribed in circle option.

Lesson 3: Draw a Polygon | 5

5The dynamic prompt changes to “Specify radius of circle.” Enter 3.25 and press the Enter key to specify the radius of the inscribed circle. You

have created a six-sided polygon inscribed within a circle.

6Click ? Save. You will use this file in Lesson 4.

Lesson 4: Apply a Hatch Pattern

In this lesson, you learn how to apply a hatch pattern to a closed boundary.

You can fill a closed boundary with a predefined hatch pattern; a simple line

pattern using the current linetype; or a custom hatch pattern. One type of

pattern is called solid, which fills an area with a solid color.

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To use a predefined hatch pattern

1On the ribbon, click Home tab ? Draw panel ? Hatch.

The Hatch Creation contextual tab is displayed.

2On the ribbon, click Hatch Creation contextual tab ? Boundaries panel ? Pick Points.

3Click inside the polygon to apply the hatch.

4On the ribbon, click Hatch Creation contextual tab ? Properties panel ? Hatch Type and select User Defined.

Lesson 4: Apply a Hatch Pattern | 7

5On the ribbon, click Hatch Creation contextual tab ? Pattern panel ?Hatch Pattern and select Steel.

6Press Enter. The selected hatch pattern is applied to the polygon.

7Click ? Save, and then close the drawing.

Lesson 5: Draw an Arc

In this lesson, you learn how to create a curved object called an arc.

To draw an arc

1Click ? Open.

2In the Select File dialog box, browse to C:\My Documents\Tutorials and select the bolt_add_arc.dwg file.

3Click Open. In this lesson, you will finish the side view drawing of a bolt by adding an arc.

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4To make it easier to add the arc, zoom in on the bolt and pan to bring it into view.

5On the ribbon, click Home tab ? Draw panel ? 3-Point.

6Drag the cursor down to the bolt drawing and go to the location indicated by the colored square in the following figure. The word “endpoint” will appear in the dynamic input cursor.

NOTE If the colored square does not appear, make sure the drafting settings are set as described in Lesson 1.

7Click near the center of the colored square. This is the first point of the arc. The square is a visual cue that helps you “snap” to the exact endpoint of the existing line. This feature allows you to create precise drawings.

Lesson 5: Draw an Arc | 9

8Move the cursor away from the first point. Next, you will enter the

location for the second point, as well as the arc angle. Both of these are

entered using the dynamic input prompt.

9First, use your keyboard to enter 0.2000 for the second point of the arc.

Notice that this value appears in the dynamic input box. Do not press

Enter. Instead, press the Tab key on your keyboard.

10The tab key takes you to the dynamic input prompt for the arc angle.

Enter 120. Press Enter to complete the second point of the arc.

11Move the cursor down to the location shown in the following figure.

When the colored square appears and “endpoint” appears in the dynamic

input cursor, click in the center of the square to complete the arc.

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12Click ? Save, and then close the drawing.

Lesson 6: Draw a Polyline

In this lesson, you learn how to create an object called a polyline. A polyline

is a sequence of segments created as a single object. Polylines can contain

both straight and curved segments. In this lesson, you learn how to draw a

polyline with straight segments.

To draw a polyline

1Click ? Open.

2In the Select File dialog box, browse to C:\My Documents\Tutorials and select the bolt_add_polyline.dwg file.

3In this lesson, you will finish the side view drawing of a bolt by adding polylines.

Lesson 6: Draw a Polyline | 11

4On the ribbon, click Home tab ? Draw panel ? Polyline.

5Drag the cursor down to the bolt drawing and go to the location indicated by the colored square in the following figure:

NOTE If the colored square does not appear, make sure the drafting settings

are set as described in Lesson 1.

6Click near the center of the colored square. This is the first point of the polyline.

7Drag the cursor to the location indicated by the colored square in the following figure:

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8Click near the center of the colored square. You have drawn the first line in the polyline.

9Drag the cursor to the location indicated by the colored square in the following figure:

10Click near the center of the colored square. You have drawn the second line in the polyline.

11Drag the cursor to the location indicated by the colored square in the following figure:

Lesson 6: Draw a Polyline | 13

12Click near the center of the colored square. You have drawn the third line in the polyline.

13Press the Enter key to end the polyline.

14Click on one of the line segments of the polyline to select it. Notice that when you select one line segment, the entire polyline is selected.

15Click ? Save, and then close the drawing.

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