Some time ago, I have written a series of five practical functions, such as printing, graphic search and positioning, electronic transmission, tool palette, module creation and viewport application, which are newly launched by Zhongwang CAD2009. Support and recognition of friends, in order to let more friends understand domestic software, use domestic software, here, I will continue to share with you another practical function of Zhongwang CAD2009: pinch editing.
The pinch point in CAD refers to a feature point, also called a key point, set at some special position of each entity in order to facilitate control and manipulation of the entity. Proper use of grips can be used not only to capture points on a given entity, but also to control, edit, and manipulate in several different ways (stretch, move, rotate, change, mirror, etc.) provided by the grip automatic editing mode. Graphics.
In Zhongwang CAD2009, the positions of the grips of each entity are as follows:
entity | Grip position |
| point | At the point |
| straight line | Two endpoints and midpoint |
| Polyline | Line endpoints and nodes |
| Arc | End point, midpoint, and center |
| shape | Insertion point |
| Wide line | Four nodes |
| circle | Quarter point and center |
| Polygon | End point |
| text | Insertion point and second alignment point |
| Tile | Insertion point |
| Attributes | Insertion point |
| Dimensioning | Label text center and four endpoints |
Zhongwang CAD2009, system variables of pinch points
| System variable | Designation of grips in function control blocks |
| GRIPADSORB | Control the display of the pinch adsorption range |
| GRIPBLOCK | Designation of grips in the control block |
| GRIPCOLOR | Control the color of the unselected grip |
| GRIPHOVER | Determines the color of the grip when the cursor hovers over the grip |
| GRIPHOT | Control the color of the selected grip |
| GRIPOBJLIMIT | Suppresses the display of grips when the initial selection set contains more than a certain number of objects |
| GRIPS | Control the use of set grips in grip mode |
| GRIPSIZE | Set the size of the grip box in pixels |
| GRIPTIPS | Controls the display of the grip point when the cursor hovers over the custom object that supports the grip hint |
Check of the grip
Select the object without executing any commands, display its grip, the default is blue, called "cold spot", and then click on one of the grips, the color of the grip will turn red, called "hot spot", At this time, the command line prompts:
"** Stretch**
Specify the stretch point or [base point (B) / copy (C) / give up (U) / exit (X)]:"
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