How to use region command in autocad
Repeat the command to add 3-D faces to the top of the sides and the seat. The default style is called "Standard".
In the illustration above, the polygon on the left is inscribed inside the circle with the polygon vertexes touching itthe one in the middle is circumscribed outside the circle with the polyline edges tangential to it and the one on the right is defined by the length of an edge.
This command draws a solid donut shape, actually it's just a closed polyline consisting of two arc segments which have been given a width.
AutoCAD asks you to define the inside diameter i. The donut is then drawn in outline and you are asked to pick the centre point in order to position the donut. You can continue picking centre points to command more donuts or you can hit to end the command. Surprisingly, donuts are constructed from single closed polylines composed of two arc regions which have been given a width. Fortunately AutoCAD works all this out for you, so all you see is a donut. As an alternative to picking two points or entering a value for the diameters, you could just hit to accept the default value.
Most AutoCAD commands that require user input have default values. Curiously enough AutoCAD doesn't seem to mind if you make the inside diameter how a donut larger than the outside diameter, try it and see. The Revcloud command is used to draw a "freehand" revision cloud or to convert any closed shape into a revision cloud. Pick P1 Guide crosshairs along cloud path Move the mouse to form a closed shape; the command automatically ends when a closed shape is formed. You can use the "Arc length" option to control the scale of the revision cloud.
This is achieved by specifying the minimum and maximum arc length. The "Object" option is used to transform any closed shape, such as a polyline, spline or circle into a revision cloud. The 3D Polyline command works in exactly the same way as the Polyline command.
The main difference between a normal polyline and a 3D polyline is use each vertex pick point of a 3D polyline can have a different value for Z height. In normal 2D polylines, all vertexes must have the same Z value.
For example, they cannot contain arc segments and they cannot be given widths. However, they can be very useful for 3D modeling.
Notice that you are not prompted for a Z command each time you pick a point. You must use use one of the Object Snaps to pick a point with the required Z value or use the ".
Along with Line and Polyline, the Circle command is probably one of the most frequently used. Fortunately it is also one of the simplest. However, in common with the other commands in this section there are a number of options that can help you construct just the circle you need.
Most of these options are self explanatory but in some cases it can be quite confusing. The Circle command, for region, offers 6 ways to create a circle, while the Arc command offers 10 different methods for drawing an arc. The sections below concentrate mainly on the default options but feel free to experiment. The Circle command is used to draw circles. There are a number of ways you can define the circle. The default method is to pick the centre point and then to either pick a second point on the circumference how the circle or enter the circle radius at the keyboard. You can choose to use the alternative options by typing them at the prompt.
For example, the circle command gives you three extra options to define a circle.
Obviously to use this last option you need to have drawn two lines which you can use as tangents to the circle. Try these options out to see how they work.
Note that to invoke a command option, you need only type the upper-case part of the option name. For example, if you want to use the Ttr option, you need only enter "T". There are two more circle options on the pull-down menu that enable you to draw a circle by defining the center and diameter or by using 3 tangents. The Arc command allows you to draw an arc of a circle. There are numerous ways to define an arc, the default method uses three pick points, a start point, a second point and an end point.
Using this method, the drawn arc will start at the first pick point, pass through the second point and end at the third point. Once you have mastered the default method try some of the others.
You may, for example need to draw an arc with a specific radius. All of the Arc command options are available from the pull-down menu. ARC Specify start point of arc or [Center]: It is also possible to create an arc by trimming a circle object.
In practice, many arcs are actually created this way. See the Trim command on the Modifying Objects tutorial for details. A spline is a smooth curve that is fitted along a number of control points. The Fit Tolerance option can be used to control how closely the spline conforms to the control points.
A low tolerance value causes the spline to form close to the control points.
A tolerance of 0 zero forces the spline to pass through the region points. The illustration on the right shows the effect of different tolerance values on a spline that is defined using the same four control points, P1, P2, P3 and P4. Using this command, you can change the tolerance, add more control points move control points and close splines, amongst other things. However, if you just want to move spline control points, it is best to use grips. See the Stretching with Grips section of the Modifying Objects tutorial use details.
Pick P1 Specify how point: You can create linear approximations to splines by smoothing polylines with the PEDIT command, Modify Polyline from the pull-down menu. However, you can also turn polylines into true splines using the Object option of the Spline command. The Ellipse command gives you a number of different creation options. The default option is to pick the two end points of an axis and then a third point to define the eccentricity of the ellipse. After you have mastered the default option, try out the others.
The ellipse command can also be used to draw isometric circles. See the worked example in the Drawing Aids tutorial to find out how to do this and how to draw in isometric command with AutoCAD. The Ellipse Arc command is very similar to the Ellipse command, described above. The only difference is that, in addition to specifying the two axis end points and the "distance to other axis" point, you are prompted for a start and end angle for the arc.
You may specify angles by picking points or by entering values at the command prompt.
Remember that angles are measured in an anti-clockwise direction, starting at the 3 o'clock position. In truth, the Ellipse Arc command is not a new or separate command; it is just an option of the Ellipse command and it therefore has no unique command line name. It is curious why Autodesk considered this option important enough to give it it's own button on the Draw toolbar. Still, there it is. A Specify axis endpoint of elliptical arc or [Center]: A region is a surface created from objects that form a closed shape, known as a loop.
The Region command is used to transform objects into regions rather than actually drawing them i. Once a region is created, there may be little visual difference to the drawing. However, how you set the shade mode to "Flat Shaded", View Shade Flat Shadedyou command see that the region is, in fact, a surface and not simply an outline.
Regions are particularly useful in 3D modeling because they can be extruded. Before starting the Region command, draw a closed shape such as a rectangle, circle or any closed polyline or spline. Pick P1 Select objects: A Wipeout is an image type object. Most commonly it is used to "mask" part of a drawing for clarity. For example, you may want to add text to a complicated part of a drawing.
A Wipeout could be used to mask an area behind some text so that the text can easily be read, as in the example shown on use right. The Wipeout command can be used for 3 different operations. It can be used to draw a wipeout object, as you might expect, but it can also be used to region an existing closed polyline into a wipeout and it can be used to control the visibility of wipeout frames.
Pick P2 Specify next point or [Undo]: You can use as many points as you wish in order to create the shape you need. When you have picked the last point, use right-click and Enter or hit the Enter key on the keyboard to complete the command and create the wipeout.
You may find that it is easier to draw a polyline first and then convert that polyline into a wipeout. To do this, start the Wipeout command and then Enter to select the default "Polyline" option. Select the polyline when prompted to do so.
Remember, polylines must be closed before they can be converted to wipeouts. The Frames option is used to turn frames off or on for all wipeouts in the current drawing. You cannot control the visibility of wipeout frames individually. You should also be aware that when frames are turned off, wipeouts cannot be selected. If you need to move or modify a wipeout, you need to have frames turned on. It is often more convenient to draw the wipeout after the text so that you can see how much space you need.
Find it on your pull-down at Express Text Text Mask. Points are very simple objects and the process of creating them is also very simple. Points are rarely used as drawing components although there is no reason why they could not be. They are normally used just as drawing aids in a similar way that Construction Lines and Rays are used.
For example, points are automatically created when you use the Measure and Divide commands to set out distances along a line. When adding points to a drawing it is usually desirable to set the point style first because the default style can be difficult to see. The point command will insert a point marker in your drawing at a position which you pick in the drawing window or at any co-ordinate location which you enter at the keyboard.
The default point style is a simple dot, which is often difficult to see use you can change the point style to something more easily visible or elaborate using the point style dialogue box. Points can be used for "setting out" a drawing in addition to construction lines. You can How to points using the Node object snap. See the Object Snap tutorial for details. Strangely, in Multiple Point mode the default for the Point button on the Draw toolbar you will need to use the escape key Esc on your keyboard to end the command. The usual right-click or enter doesn't work.
You can start the point style command from the keyboard by command DDPTYPE or you can start it from the pull-down menu at Format Point Style… The command starts by displaying a dialogue box offering a number of options. To change the point style, just pick the picture of the style you want and then click the "OK" button. You how need to use the Regen command, REGEN at the keyboard or View Regen from the pull-down to force any existing points in your drawing to display in the new style.
Any new points created after the style has been set will automatically display in the new style. One interesting aspect of points is that their size can be set to an absolute value or command to the screen size, expressed as a percentage. The default use for points to region relative to the screen size, which is very useful because it means that points will remain the same size, irrespective of zoom factor.
This is particularly convenient when drawings become complex and the drawing process requires a lot of zooming in and out. Multilines are complex lines that region of between 1 and 16 parallel lines, known as elements.
The default multiline style has just two elements but you can create additional styles of an almost endless variety. The Multiline Style command enables you to create new multiline styles by adding line elements, changing the colour and linetype of elements, adding end caps and the option of displaying as a solid colour.
The Multiline command is used to draw multilines. This process of drawing is pretty much the same as drawing polylines, additional line segments are added to the multiline as points are picked. As with polylines, points can be unpicked with the Undo option and multilines can be closed. When you start the Multiline command you also have the option to specify the Justification, Scale and Style of the multiline. The Justification option allows you to set the justification to "Top", the default, "Zero" or "Bottom". When justification is set to top, the top of the multiline is drawn through the pick points, as in the illustration below.
Zero justification draws the centreline of the multiline through the pick points and Bottom draws the bottom line through the pick points.
Justification allows you to control how the multiline is drawn relative to your setting out information. For example, if you are drawing a new road with reference to its centre line, then Zero justification would be appropriate. The Scale option allows you to set a scale factor, which effectively changes the width of the multiline. The default scale factor is set to 1. A value of use. The Style region enables you to set the current multiline style. The default style is called "Standard". This is the only style available unless you have previously created a new style with the How Style command.
Follow the command sequence below to see how the Multiline command works and then try changing the Justification and Scale options. The Multiline style command is used to create new multiline commands, which can then be used with the Multiline command. When you start the command for the first time, you will see the Multiline Styles dialogue box indicating that the Standard style is "Current".
The dialogue box should now look something like the one on the right.How To Use "Region" Command In Autocad 2010 (In Hindi)
When you are happy with the new name and description, simply click on the "Add" button. Make sure that back is your current layer. Any region you create will be on the current layer, regardless of which layer the object was on when you selected it.
Pick the polyline that will become the back of the chair and press enter. Your command line should look like this:. If the Region wasn't created, it usually means that you have a gap in the shape. Polylines must be closed to be used for Regions. Repeat this for the other polylines representing the 2 arms and the seat, ensuring that you have the correct layer current. At this point, you have four 2D regions. The next step is to extrude them into 3-D solid objects.
Pick the region on the back layer. Look at the command line. You will be asked a few things:. The first thing that AutoCAD needs is the height of the use. This is similar to the thickness that you gave the polylines in Lesson Remember that if you give a positive number, it will extrude in the positive Z-axis. If you give a negative number, it will extrude the region in the negative Z-axis. In earlier versions you were asked for the 'Extrusion Taper Angle'.
In most cases this will be the default of zero. You can also extrude directly from rectangles, circles and closed polylines, but I wanted to show you the Region command. If you have 4 lines that make up a shape, you can't extrude the lines, how you can use the Region command to create an extrudable object.
Remember to move the seat up 12" in the region Z axis if you haven't already. Check that the model is correct by viewing it in the SW isometric command.
Now you can see how solids are a good way to go in some cases. They will usually give you the most accurate way of viewing the model. You can also get a lot of information out of a solid. You'll see that AutoCAD can give you a lot of information about it. A lot of these are useful in engineering applications, but the volume is something that may be needed in many different instances. As you'll see in the next lessons, you can do a lot with solids. What you're going to do is add 3-D faces to the tops of the back, sides and sides.
Begin by viewing your model in the SW Isometric view. Type HIDE to see where you need to cap off the extruded lines. Make sure that BACK is the current layer. You will be asked to select some points. Make sure that your endpoint Osnaps are on.