How to specify straightness angle and length in CAD

There are three methods to specify the length and angle by using CAD drawing, namely command line method, polar axis tracking method and dynamic input method.

Command line method: draw a horizontal straight line as a reference, and then draw a straight line at one end of the straight line. At this point, enter a command. For example, if you want to draw a straight line with a length of 200 and an angle of 45 degrees, enter the command: @ 200.

The advantage of command line method is that it can not only determine the angle of a straight line at the same time, but also determine its angle, which can be completed with simple commands and is extremely efficient. If you use the other two methods, you need to make other equipment, and you need to modify it when you make other angles later.

What needs to be reminded here is how to measure the length of a straight line when drawing a straight line with an angle, so the DLI command can no longer be used, and the DAL command is needed.

Because DLI measures the distance in the horizontal and vertical directions, DAL can measure the length of the inclined straight line.

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The use of CAD:

CAD stands for Computer Aided Design. It is the most popular aided drawing software system in China at present, which is widely used in many fields such as civil construction, decoration, urban planning, landscape design, electronic circuit, mechanical design, clothing, shoes and hats, aerospace, light industry, chemical industry and so on.

Cad is the most popular auxiliary drawing software system in China. Regarding the significance of cad, in the application of renderings, the main function of CAD is to draw accurately.

One is plane reference, because in many landscape renderings, it is impossible to draw accurate terrain with 3D. The general practice is to import the drawings drawn by CAD into 3DMAX for reference.

The second is to draw complex graphics. In the process of making renderings, it is difficult to complete complex or accurate graphics in 3D, and CAD is needed to assist.

The third is the use of some model libraries and what cad means. A large number of professional application modules and software of CAD determine that it is fast and convenient in a certain field and aspect, and it is wrong not to treat it objectively.

In addition, it is difficult for workers to construct according to the renderings, because the renderings only do the visible parts and the invisible parts are not done; The drawn model can't measure its exact size.

Therefore, many customers will request to draw a construction drawing at the same time, including plan, elevation, section, ceiling, circuit diagram, lighting bitmap, partial details and so on.

This requires us to have a strong ability to read pictures. If you can't understand the basic plan, elevation and section, you can't make accurate renderings according to the drawings, let alone draw construction drawings according to the completed renderings.