The Research And Development Of An Embedded Geometer's Sketchpad With Multiple Functions

With the development of the history and society, and the innovation of the technology, the application of the embedded products becomes so popular. From this developing trend, we can conclude that the embedded products will emerge every department in the future. Considering the prospects, the system uses the embedded technology to develop a drawing board application with multiple functions.The application, which is a tool for drawing vector images, is based on the embedded system. It can be run in most of the embedded products. The main functions include interactive drawing, repainting of the image, enlarging of the image, movement of the image, reversing operation, deleting and recovery of the image.In the design process, a series of research was launched. The research is on many issues such as improving the speed which the vector graphics system redraw, solving graphic magnification, how the large capacity data storage and so on. Through the analysis, the multi-threaded technology was used to enhance the speed which graphics redrawn; the problem of graphical magnification was solved through the trim operation, which is only drawn graphic elements on screen; the problem of large capacity for storing graphic data was solved through the method of placed vertex ordinate. This application has so many advantages, such as the accuracy of data, high efficiency of the algorithm, friendliness of the interface.