Autocad Rotate Reference
Apr 16, 2011 Rotate with the Reference option to Align Posted on April 16, 2011 by AutoCAD Tips You may know that there is the ALIGN command which is really helpful. But with the ALIGN command the object that you are aligning/rotating end up being moved to its reference object. Rotating with reference Rotating an object in AutoCAD is also very simple, you need to select the object then specify the base point or the pivot point and then the angle up to which you want to rotate the objects.
You can use the Rotate command’s Reference option to align a set of objects graphically to another object. For example, suppose you want to rotate a set of circles inside a hexagon to align with the corner of the hexagon.
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To do this, you can use the Reference option as follows:
- Sometimes you need to rotate an object to match the angle of an existing object. Here’s one way to accomplish that, using the Reference option of the ROTATE command. In this example, you want to rotate the desk to match the rotation of the end wall. Follow these steps: Start the ROTATE command and select the objects that you want to rotate.
- Typing 'R ', AutoCAD prompts for the reference angle, which you can either type or select two points on the drawing (selecting the base point of rotation as the first point makes things easier) to define the reference angle. Rotation of the object is now based on this new rotation angle.
- Start the Rotate command, and select the circles.
- At the Specify base point: prompt, use the Center osnap to select the center of the hexagon as represented by the central circle. Once you do this, the objects rotate around the selected point as you move your cursor.
- At the Specify rotation angle or [Copy/Reference]: prompt, enter R.
- At the Specify the reference angle <0>: prompt, use the Center osnap to select the center of the hexagon again.
- At the Specify second point: prompt, use the Center osnap to select the center of one of the circles you want to align with the hexagon. Now, as you move the cursor, the circle whose center you selected is aligned with the cursor angle.
- At the Specify the new angle or [Points]: prompt, use the Endpoint osnap to select one of the corners of the hexagon. The circles align with the corners.
You can also use grips to align objects. Here’s how: Select the object or set of objects and then click a grip. The grip you select becomes the rotation point, so select this first grip carefully. Right-click and select Rotate. Type R and select the grip you just selected and another point to determine the reference angle. Finally, select the new angle for the object or set of objects. If you want to rotate around a point other than the first grip, use the Grip Base right-click option. If you’d like to experiment with the Rotate Reference option, we’ve provided a sample file that you can use called rotatereference.dwg.
Publisher Information
This is a short excerpt from the Mastering AutoCAD 2018 and AutoCAD LT 2018 student guide from WILEY, an Autodesk Authorized Publisher. For more information, visit http://www.wiley.com.
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Related Tasks
I want to create a simple 'rotate' command with AutoLisp, so this is the code I wrote:
I insert two points, p1 and p2 and create a line which connects them. After that I create the ss1 object which is the line p1-p2. Finally I attempt to rotate the line from base point p2 for 90 degrees.
I insert the code in AutoCad, but instead of creating the rotated line, it asks to insert manually the base point as well as the angle, so I guess that there is a problem with the command 'rotate' .. line.
Any suggestions would be appreciated.
user3060854user30608542 Answers
From what I've seen online, you have two problems.
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ROTATE does not take a selection set but an entity name
Missing an extra ' before the rotation point.
Reference: AutoLISP: Rotate Multiple Objects Around Their Base Point
As a side note, it usually helps me to try the command manually to make sure you are responding to all the correct prompts with the correct data/values.
crashmstrcrashmstrI would suggest the following simplified code:
This accounts for null user input at the prompts, uses a rubber-band for the second point prompt, allows for active Object Snap modes when supplying the point arguments to the commands (through the use of '_non'), and also allows for non-English versions of AutoCAD (through the use of an underscore), and potentially redefined commands (through the use of the '.' command prefix).
How To Rotate Autocad Drawing
This could be further improved by temporarily setting the CMDECHO system variable to 0 to suppress command-line echoing.
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