autocad constraints

Self-built http://through-the-interface.typepad.com/through_the_interface/2008/07/conditional-sel.html This articleArticleIn a previous article, we can findCode. Here we are concerned about how to better select entities in multiple layers: the choice of filtering mechanism of AutoCAD makes this choice easy to implement, at the same time, it can achieve composite selection related to each attribute of the object. This post was too red by a comment

vs2010+ AutoCAD 2012 Development debugging process, found that the normal class inside the breakpoint can be traced, may be to create a custom form interface is, Form1.cs code breakpoints are not used. The reason for this is the fiber (Fiber) of AutoCAD. Yes, it's a fiber (Fiber) instead of a thread. There are problems with VS2010 's debugger working with AutoCAD

AutoCAD series software has always been one of the most popular design software, in the Mac platform is the same, but the genuine AutoCAD price also let a lot of individual users, especially in the learning phase of the student users have to find all kinds of cracked version on the internet. The uneven software version and some cracked software contain rogue software bundle download also let many user frien

Database integrity and constraints, database integrity constraints Reprint please indicate from Zhu jiayuan http://blog.csdn.net/zhgl7688 Database integrity and constraints 1. Data Integrity: three types of constraints are commonly used to ensure data integrity: domain (column) Integrity, entity integrity, and referen

The function and use of 8.6.1 time query In an AutoCAD system, call the time command to display statistics about the date and time of the graphic in the text window, such as the current times, when the graphic was created, and so on. This command uses the system clock to complete the time function, with a 24-hour time format that can be accurately displayed to milliseconds. The command is invoked in the following way: Menu: "Tools" → "Inquiry (quer

First, use shift to add deletion entities in the Select Set In AutoCAD, the selection set is an operation we can not avoid, and sometimes we need to add or delete a new entity in the selection set, at which point the SHIFT key will be useful. First of all, we use the mouse box to select the AutoCAD drawing window of the easy to select the entity selected, so that we have set up a select set, if you want to

, adhere to the "speed, innovation, collaboration, passion," the core values. Among them, the product design innovation is particularly important. We initially used the design of electrical control in a domestic software, but many engineers reflect that the software design is not intelligent enough, and the data is not relevant, at the end of 2003, the company agreed to buy a professional software for electrical design, our electrical group of about 10 people, Electrical room director Let me an

6.4.1 Block profile Before introducing the concept of block, let's recall some of the problems encountered in manual drawing. For example, when drawing electronic circuit map, need to draw a large number of resistors, capacitors and other components, and each type of components are basically the same shape, in other words, have to do a lot of repetitive work. This problem is more or less the same in other areas, such as doors and windows in building drawings, valves and connectors in piping dia

System variables and environment variables in AutoCAD (from the official Help file) AboutSystem andEnvironment Variables(AutoLISP)(1)System VariablesAutoLISP applications can inspect and ChangeThe value of the AutoCAD system variables with theGetVar andSetvarfunctions.;; System variables are mainly related to AutoCAD. These functions use a string to specify the

Arrays are a form of AutoCAD replication, and arrays tend to have an advantage over simple replication in the case of regular multiple replications. In AutoCAD, the array is divided into two basic types: rectangular array and annular array. Rectangular array-Multiple-row and multiple-column replication, and the ability to control the number of rows and columns and the spacing of rows/columns. Annular arra

3.4.1 Mvsetup Command This command is used to set the graphic specification, which is invoked as follows: Command line: Mvsetup When this command is invoked, AutoCAD prompts the user whether to enable drawing space: Enable paper space? [No/yes] The use of this command in the drawing space is detailed in chapter 17th. Select the "No" option in this section to further prompt the user to specify the unit type, scale factor, drawing width, and heigh

Introduction to 8.9.1 Object features In AutoCAD, object characteristics (properties) is a broad concept, including color, layer, line style and other general features, but also includes a variety of geometric information, but also related to specific objects of additional information, such as the content of text, style and so on. In the previous chapters we have learned to use various editing, modification, and query commands to access the attribut

This feature option is currently available in autocad2010 and needs to be checked at the time of installation. -------------------------------------------------------------- If it is not installed, you can reinstall the Toolkit from the Control Panel-Add and Remove Programs, and some commands will be useful. Starting with AutoCADR14 Autodesk has added a program based on AutoCAD, the extension tool. AUTOCADR14 is called the "bonus program", the Engli

What are the five types of integrity constraints? Data constraints based on the MySQL database instance, integrity mysqlTo prevent non-conforming data from entering the database, DBMS automatically monitors the data according to certain constraints when you insert, modify, or delete the data, make the non-compliant data unable to enter the database to ensure that

Label:There are 5 types of---Constraints: PRIMARY key foreign key unique non-NULL check 5 class constraints Column-level constraints and table-level constraints in Oracle Column-level constraints: Columns are then added to the constraint when the table is created For example

MYSQL basic operation-data constraints and associated queries, mysql basic constraints Association I. MYSQL Constraints 1. Default Value constraints. When a field does not have a value inserted, mysql automatically assigns a default value to the field.The default field can be blank.You can also insert null for the defa

stars of good, 2 star of not 3 star good, and so on). Do not use numeric types for scales that do not perform calculations or comparisons. A common example of this error is zip code (zip code); The first number 0 has its meaning, you can't calculate it on them, and you can't sort it. The number of labels is used to represent hierarchies. The use of strings for text, name, and encoding systems can be expressed in regular expressions. For example, a ZIP code should be defined with char (5). Do no

In the previous article, junqilian used Amazon Simple Queues Service (SQS) to achieve remote interaction with AutoCAD. This article describes how to use Amazon Simple Queue Service (SQS ), here we will introduce how to use Microsoft's Windows Azure Queue Storage to implement similar functions. This is also an improvement. Generally, the most intuitive message passing is a string, but other types such as common objects can also be passed through the qu

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