Frankly speaking, such operations are best performed following Woland’s “golden” rule - “treat like with like.” It is better to crop the raster image in a program that is specifically designed for working with such objects, in the same Photoshop. How to do this in Word, compressing it in the browser or cropping a raster image in AutoCAD.
After all, the idea is very simple - why insert an image with a size of 1,000 by 800 and a volume of 20 MB onto a Web page, and then compress it to 150 by 100, the volume will remain at 20 - and the traffic during downloading, and the space on the server’s hard drive, Let's take into account that there can be up to hundreds of such pictures. Create this version in Photoshop with the desired size, it will weigh only 100 kb. So, it’s one thing to download 20 MB, and a completely different thing to download 100 kb, 200 times less!
About the same can be said about AutoCAD, which creates quite voluminous files for complex drawings - let’s not forget about 3D, shading and light sources. In general, it doesn’t hurt to always help yourself, and you can be sure that the program will help you.
However, different situations occur. In the end, there is no suitable tool at hand, and there is no time for this work. Then AutoCAD can help solve this problem - how to crop a picture, behind which the drawing is invisible.
Several fairly simple operations, almost like Word
The operating procedure is quite simple and is not much different from working in the same text process from Microsoft - Word.
We proceed as follows:
Advanced cropping capabilities
But the user has more than just a simple rectangular cropping path at his disposal. The outline can be anything. Moreover, you can even do an inversion - what falls inside the contour will become invisible.
To create a “broken” outline:
- After selecting the contour creation command, select the “Polygonal” mode.
- Next, we create a polygon from the image according to the usual AutoCAD rules.
- Once the polygon is closed, cropping will occur.
It is possible that the set snap mode will interfere with the process of creating a polygon. In this situation, the mode can be temporarily disabled in the status bar.
Canceling cropping (as the above operations are also called) is done by selecting the “Delete cropping” command in the “Cropping” panel for the selected image.
Command line option
The cropping operation on the command line corresponds to the “_imageclip” command. It is called up on some versions of the program through the “Modify” / “Clip” / “Image” menu (“Transforms” / “Crop” / “Image”). Here's how to use the command:
- First, a request to select an image appears, if this has not been done in advance, before running the “Select image to clip:” command.
- Then the general prompt “Enter image clipping option” appears
:" - creating a new outline (New - accepted by default), deleting it and restoring the full view of the picture (Delete), temporarily disabling cropping (OFF - it remains, just temporarily not applied), turning on cropping again (ON). - If the clipping construction mode is selected, then a request for its form “Enter clipping type” is displayed
:". By default, it is proposed to use rectangular cropping - Rectangular, but you can also select polygonal - Polygonal. - When selecting a rectangle, you will need to specify its upper left - lower right corners, and when selecting a polygon, specify its corners. The polygon is initially assumed to be closed, so the user does not require closing according to AutoCAD rules - we complete the construction by simply pressing Enter.
To work comfortably when creating a drawing, you need to know how to cut a line in AutoCAD and how to extend a line in AutoCAD. Using line editing is very convenient and fast; there is no need to draw a line until it intersects with another line, because it can be extended or trimmed if desired.
In the previous lesson, I talked about creating chamfers and rounding corners. Sometimes, due to bindings, it is not possible to draw a segment to the desired location, and that is when the “Cut” and “Extend” commands are required. Both of these operations are located in the “Editing” block.
Click on the command triangle and select “Crop”. Chose. The program will prompt you to select objects; instead, press the “Enter” button, the following dialog box will appear in the bottom panel.
By default, Line is selected. Now you can move the mouse cursor over the desired line, a small cross will appear at the cursor, and by clicking the mouse the line will be truncated. AutoCAD cuts the line to the nearest intersection point. The operation allows you to trim several lines at once; for this, the desired area is selected. To select an area, just press the left mouse button, bringing the courses to an empty space and, without releasing the button, select. As soon as you release the button, the line will be cut.
Thus, it is possible to trim several lines at once in AutoCAD.
Extending lines in AutoCAD occurs in the same way as cutting. The only difference is that the “Lengthen” command is selected, all other actions are performed the same way. Even if you mistakenly selected “Crop”, the situation can be corrected without pressing the “Enter” button, in the bottom panel, click on the checkbox next to the word “Crop” and select “Extend”, then press enter and extend the necessary lines.
In AutoCAD, you can extend several lines at once, in the same way as cutting them.
You can extend and trim not only straight lines and segments, but also circles, arcs and polylines.
The process of extending or trimming takes only a few seconds, and any number of lines can be changed in one operation. The ability to edit lines saves a lot of time and greatly simplifies the work of creating drawings.
In subsequent lessons we will look at other interesting ways to edit lines and drawing views, which will greatly simplify your work.
Still have questions? I suggest you ask them in the comments below.
When constructing, very often fragments of segments, arcs, etc. are found that have “crawled out” beyond the boundaries of the objects; the question arises of how to trim lines in AutoCAD. To trim such fragments in AutoCAD, use the “Crop” command. Trimming elements can also include segments, rectangles, splines, rays, etc.
Trimming in AutoCAD is carried out by specifying the so-called cutting edge and a fragment of an object, which, after intersecting with this edge, must be deleted.
The trim command in AutoCAD, like other Editing commands in AutoCAD, is very popular and easy to use if you study it in more detail. As always, you can call the “Crop in AutoCAD” command in several ways:
1. On "Home" tab → Editing panel.
2. Entering a keyword "OBR", and then pressing "Enter".
So how do you crop in AutoCAD? To answer this question, you need to consider the components of cropping: how to trim lines in AutoCAD, how to crop an image in AutoCAD and how to crop an object in AutoCAD, and study general lessons or the basics of how to work with AutoCAD. First you need to select the cutting edge (or edges), and then you will have to select the objects to be cut.
Let's give an example of how to trim an object in AutoCAD: let's say you need to trim part of a segment that extends beyond the rectangle. In this case, the cutting edge will be the rectangle itself, and the object being trimmed will be the part of the segment outside the rectangle. I presented the whole process in the figure.
There can be many cutting edges, as well as objects to be trimmed. For example, I sometimes select all or most of the objects as cutting edges. And then I click LMB on the elements that I want to trim. Immediately after specifying an object, it is trimmed. You can finish trimming by pressing the "Enter" or "Esc" key. The cut objects can also be parts of the cutting edges themselves.
By the way, if, when selecting objects to be cropped, the selection is made with the “Shift” key pressed, then the objects will not be cropped, but lengthened.
When selecting objects to crop, you can use the following options:
✗ Line and Sekramka– allow you to select objects to be cropped using a temporary polyline and a cutting frame.
✗ Edge– turns on/off the mode of continuing the edge to an imaginary intersection.
When the mode is enabled, AutoCAD will trim in cases where the object being trimmed does not clearly intersect with the cutting edge. Whether this mode is enabled or not can be seen from the command line prompt when calling the “Crop” command in AutoCAD.
If it says “Edges = No Continue,” it means the mode is turned off. You can enable it before selecting the objects to be trimmed by entering the letter “C” into the command line (or simply from the keyboard).
✗ Cancel- an option that allows you to cancel cropping of the last object without completely canceling the execution of the entire command.
In this lesson we will study the command trim / lengthen and learn how to use it to correctly trim lines.
The command allows you to trim lines specified by the user, relative to objects previously selected by him, or vice versa - to extend the lines of arcs or segments to a certain primitive in the drawing.
First of all, the program will ask you to select objects. Important ! First of all, we select not the objects that we will shorten or lengthen, but the one in relation to which we will perform the trimming.
After selecting the base object, press RMB and indicate those segments that we want to trim or extend. Important ! If we are trimming objects, then we need to point to that part of the segment or arc that we want to delete.
Pay attention to the hint in the command line or dynamic input: when you press the Shift key and select any object, we will lengthen it if we initially selected the “crop” command and vice versa.
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Cutting lines is one of a large number of mechanical actions performed in drawing. For this reason, it should be fast, intuitive, and not distracting from your work.
This article will describe a simple mechanism for cutting lines in AutoCAD.
How to trim a line in AutoCAD
In order to cut lines in AutoCAD, there must be intersections of lines in your drawing. We will remove those parts of the lines that are not needed after the intersection.
1. Draw objects with intersecting lines, or open a drawing that contains them.
2. On the ribbon, select Home - Editing - Trim.
Please note that on the same button as the “Crop” command there is a “Lengthen” command. Select the one you need from the drop-down list.
3. Select one by one all the objects that will participate in cropping. Once this step is complete, press “Enter” on your keyboard.
4.Move the cursor to the segment you want to delete. It will become darker. Click on it with the left mouse button and part of the line will be cut off. Repeat this operation with all unnecessary segments. Press “Enter”.
If you are uncomfortable pressing the “Enter” key, call up the context menu in the work field by right-clicking and select “Enter”.
To undo the last action without leaving the operation itself, press “Ctrl + Z”. To exit the operation, press "Esc".
This was the easiest, fastest way to cut lines, let's see how else AutoCAD can cut lines.
1. Repeat steps 1-3.
2. Pay attention to the command line. Select “Line” from it.
3. Draw a frame in the area of which the trimmed parts of the lines should fall. These parts will become dark. When you finish constructing an area, the line fragments that fall within it will be automatically deleted.
By holding the left mouse button, you can draw an arbitrary area for more precise selection of objects.
With this method, you can trim multiple lines in one action.