In the 21st century, CAD modeling technology has not seen a major breakthrough that people have been waiting for for a long time, but it has made a lot of progress in application and practical technology, which is reflected in the following aspects:

Graphical interaction improvement

CAD software is a tool for product innovation. As a tool, it is easy to learn and use, and it is handy to form a friendly and intelligent working environment. Such a work environment can open up the user's mindset, free up his brain, and concentrate on design creation, not the order of operation or rules of use of the software.

1. Intelligent icon menu

Multi-level pop-up or drop-down menus are no longer sufficient for users. A good menu structure can make the design cycle 20% to 50%. The intelligent icon menu structure is the future development trend of CAD software.

The good menu structure is: the number of times the user moves the cursor between the graphic operation area and the menu area should be as small as possible, the menu level should be as small as possible, the menu should be intuitive, concise and clear, and the menu items should be automatically combined and adjusted according to the frequency of use. The structure of the operation instruction is very simplified.

2. "Drag and drop" modeling

Design is a flexible modification. Intuitive and real-time "drag and drop" design and modification of 3D entities has always been the goal of designers. With the support of variable technology, the flexibility of separate processing can be achieved by using shape constraints and size constraints. It has realized the function of graphically editing and modifying the common features on the part directly and intuitively in real time. The future development direction is to achieve an intelligent, complete "drag and drop" style.

3. Dynamic guide

At present, in some software, the operation mode of pop-up menus with the cursor at any time has been increasing. As the cursor moves, the dynamic guide automatically picks up, determines the type of all model elements and the relative position of the space, understands the user's design intent, memorizes the common steps, and prompts the user for possible work in the next step. This is a good application example of software intelligence.

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