In the process of architectural modeling and decoration designing, it needs different softwares to finish 3D modeling, effect drawing, animation, the material statistics and the 2D drawing; It is a real difficult problem to combine the several different simulation procedures in only one system. This article does some research on computer aided system of decoration, discourses the current application situation of the decoration software, discusses the basic system simulation theory, introduces the frame about computer aided system of decoration, and describes several important technology measures. At last, it validates the validity of this simulation system using the real applications. The system successfully integrates several functions including 3D modeling, drawing, animation, mixing scene, sticking picture, which satisfied the needs of designers. Meanwhile the system has been widely used for designing as a commercial software, and enhances the whole work efficiency of architecture and decoration designing.

This paper discussed new problems during sunlight software application, such as complicate 3D modeling and large scale project computing, even fail to finish computing. Taking PKPM sunlight software as example, which give correspoing creative technology solutions to modeling, such as domestic 3D modeling graphic platform, complicate pitched roof and terrain quick modeling and analyse. For large scale project computing, this paper discussed kernal graphics card GPU accerlation, and also gave some computing time comparison result and real large project computing examples.

This paper system introduced PKCG which based on the new national "Standard for daylighting design of buildings" (GB50033-2013), the development of design principle of PKPM software PKCG natural lighting design and development method, and briefly introduces its function and characteristics of such as flexible way of parameter settings, daylighting optimization measures, the simulation results provide daylighting simulation optimization proposal and automatically generate reports, etc.

This paper summarize basic theory, compute accerlate technology and application of building sunlight analyse CAD program. Such as compute the position of sun, large scale points analyse accerlation technology, It introduce some basic analyse methods based on local sunlight time-long compute stands, the represention of compute result, such as real-time drawing building shadows, sunlight analyse table and report. Above sunlight traditonal analyse areas, some extended areas, such as compute and utilitize soloar exposure energy, glass wall reflection and sunlight pollution, shading device design are also discussed in this paper. The methods and technologies discussed in this paper have been used in PKPM sunlight.

With the rapid development of domestic urban construction, there are more and more high-level and high-rise buildings.The problem of lighting right blocked by buildings becomes serious.In the planning management, how to reasonably define sunlight overshaded range and balance the interests of the developer and the surrounding residents are difficult problems for the planning management departments at various levels.Combining the national and local standards, and based on the actual working conditions, the paper discusses how to define the reasonable overshadowed range in sunlight calculation, which has reference significance to planning and management departments of all levels.

With the development of domestic housing commercialization and urban land nervous, increasing local housing height, high-rise residential has become the main form of housing, and even in some big cities super-tall residential have emerged, caused by sunlight problem lighting right disputes also frequently occur, sunlightproblem in the urban planning and architectural design need to highlight to consider. Combining with the approval of "Standard of Sunlight Assessment Parameters for Building"draft of the relevant provisions, the more attention of sunlight in the analysis modeling, parameter Settings of sunlight, sunlight calculation result and error parsing are discussed.

In this paper, the recording method of all information in the life cycle of building information modeling BIM (Building Information Modeling), geometric model browsing based on 3D digital technology, historical and cultural information of building, design and construction information, disasters and maintenance records and inquiries, the physical properties of the local components, records and queries of the construction process, BIM-based heritage and buildings analysis were researched. It provides a reliable basis for all decision-making of the protection of cultural relics and the most comprehensive information for the study of heritage buildings.