[Technical Exchange] select objects in atuocad

Select objects methods in atuocad include some options that we rarely know.

　　1. Direct vertex fetch method (default)
You can click the mouse or another input device to obtain the object. After the object is displayed in high brightness, it indicates that the object has been selected and we can edit it. You can call "OPTIONS…" in the "Tools" menu of AutoCAD ..." In the displayed "options" dialog box, select the "selection" option card to set the size of the Selection box (you can modify the box as needed to achieve satisfactory results ). If we enter Au (auto) at the "select object:" prompt, the effect is equivalent to "direct vertex acquisition ".

　　Ii. Window Mode
When the "select objects:" prompt appears in the command line, if you move the dot box to a blank area in the figure and hold down the left mouse button, atuocad will prompt: the other corner, at this time, if you move the vertex frame to another position and press the left button, atuocad will automatically take the two vertices as the vertex of the rectangle and determine a default rectangular window. If the window is defined from left to right, all objects in the box are selected, and the objects located outside the window and intersection with the window are not selected; if the window in the Rectangular Box is defined from the right to the left, not only the objects inside the window are selected, but also the objects that intersection the window boundary. In fact, the box defined from left to right is a solid box, and the box defined from right to left is a dotted box (You may wish to observe it ). For the window mode, you can also enter W (Windows) directly at the "select objects:" prompt to enter the window selection mode. However, in this case, whether the window is defined from left to right or from right to left, it is a solid box. If we enter box at the "select objects:" prompt and then select an object, the selection method is the same as that of the default window.

Iii. Cross-selection
When "select objects:" is displayed, type C (crossing). No matter in which direction the rectangular box is defined, the box is a dotted box and the solid mode is selected as a cross. As long as the dotted box passes, the object is selected regardless of its intersection or in the box.

　　Iv. Group Mode
Group several objects. When "select objects:" is displayed, type G (group) and press Enter. Then, the command line displays "input group name: "Enter the group name and press Enter. The corresponding image is selected. This method applies to objects that require frequent operations. In addition, if you select an object directly at the "select objects:" prompt, all objects in the group to which this object belongs will be selected.

　　V. Previous Method
This feature allows you to select an object from the previous edit operation as the current selection set. At the "select objects:" prompt, type P (previous) and press Enter. The last set constructed before the current Editing Command is executed as the current selection set.

　　Vi. Final Method
This feature allows you to use the previously drawn objects as the current selection set. Enter L (last) at the "select objects:" prompt and press Enter. atuocad selects the last object.

　　VII. All methods
This feature allows you to use all objects in the current graph as the current selection set. At the "select objects:" prompt, enter all (Note: you cannot only type "A") and press Enter. atuocad automatically selects all objects.

　　8. Irregular window mode
At the "select objects:" prompt, enter WP (wpolygon) and press enter to create any closed irregular polygon. All objects in this polygon are selected (You may notice that, in this case, the polygon box is a solid box, which is similar to the selection method of the rectangular window defined from left to right ).
9. irregular cross-window mode
At the "select objects:" prompt, type CP (cpolygon crossover polygon) and press enter to create any irregular polygon, objects in this polygon and all objects that intersect with the polygon are selected (the polygon box is a dotted box, which is similar to the selection method of the rectangular window defined from the right to the left ).

　　10. cabling Mode
This mode is similar to the irregular cross window mode (dotted line), but it does not need to enclose a closed polygon. When this mode is executed, all the images with the broken lines are selected. Enter F (fence) at the "select objects:" prompt to enter this method.

　　11. Deduction Method
In this mode, one or more objects can exit the selection set. Enter R (remove) at the "select objects:" prompt to enter this mode.

　　12. Return to join method
In deduction mode, enter a (ADD) in the "remove objects:" prompt and press Enter. atuocad returns to join mode when "select objects:" is returned.

　　13. Multiple choice
Similarly, when selecting an object, input m (multiple) to specify multiple selections without highlighting the object, thus accelerating the selection of complex objects. If the intersection object is specified twice, "multiple choice" will also select the intersection objects.

　　14. single answer
If you want to edit only one object (or object), you can enter Si (single) to select the object to be edited, you can edit only one object at a time.

　　15. Select objects Alternately
When selecting an object at the "select objects:" prompt, if the object is very close to other objects, it is difficult to obtain the object accurately. However, we can use the alternative object selection method ". At the "select objects:" prompt, press the ctrl key, press the dot box to hold the object of the key point, and then click the left mouse button. Then, one of the objects pressed by the dot box is selected, and the cursor becomes a cross. If the selected object is not the expected object, release the ctrl key and click the left mouse button. With each mouse click, atuocad will change the object that is pressed by the selected point and box, you can easily select an object.
16. Quick Selection
This is a new feature of AutoCAD2000. It can be used to obtain a set of selections constructed by filtering conditions. After you enter the command qselect, the "quick selection" dialog box is displayed, which allows you to select based on the type of the specified filter object, the features and scope of the filter to be filtered by the specified object. You can also right-click the AutoCAD2000 drawing window, And the menu contains the "quickselect" option. However, it should be noted that this feature will not be available if the selected object feature is "with layer.

　　17. Select with the selection filter (Filter)
In AutoCAD2000, the function of constructing a selection set based on the characteristics of objects is added. After entering filter in the command line, the "object selection filter" dialog box will pop up. We can construct a certain filter and save it to the disk. We can call it directly later, it is as convenient as calling "Block.
Note the following:
1. You can select an object using the selection filter, and then directly use the editing command. Or, when you use the editing command to prompt you to select an object, enter P, that is, the previous selection to respond.
2. In the filtering condition, color and line type are not the color and line type of the object because the object features "with layer", but are determined by colour, lintype and other commands specifically specify the color and line type for it.
3. The named filter can be used not only in the graph that defines it, but also in other graphs.
You can select conditions such as color, line width, and line type.

The above content is just a bit of experience I have learned during my daily use of AutoCAD. As long as you pay more attention to it and keep accumulating it, the power of AutoCAD makes our complicated design and drawing work easy.