The Method Of Process Control For Virtual Painting Based On Force Feedback Technology

In the field of industrial product consumption, consumer demand more products with personality, it is very important to improve product design method. Virtual clay modeling (virtual clay modeling, VCM) is a new CAD technology, virtual clay modeling system based on force feedback technology enables designers to complete the appearance innovative design of the product in a virtual environment, to improve the process of traditional sludge modeling and computer aided design methods, but lack of product surface decoration. Virtual3D painting process with force feedback technology, based on virtual clay modeling technology will realize the function of surface decoration to meet the designers a full range of innovative design and interaction requirements.This subject comes from the National Natural Science Foundation "The Study of Virtual Product Surface3D Painting Method based on Real-Time Force Feedback Technology" project (51175058).This paper mainly research on the control method of virtual painting process based on the force feedback technology, analyzing the relationship of force and ink footprint during virtual painting process, furthermore the impact on Chinese ink painting effect when humidity changes. We put force feedback technology into a virtual painting process, and then propose the method of ink footprint simulation based on Force Feedback technology and control of humidity on Chinese ink simulation effect. According to the brush model form in force, adopt ink footprint painting algorithm, real-time display the shape of the ink footprint and output feedback force, achieving dynamic control of the force on the ink footprint; According to ink footprint on the impact of force, calculate ink footprint area and humidity changes of brush in real-time, realizing the control of humidity on the ink diffusion effect of ink. Then achieve the control of humidity on chinese ink simulation effect to enhance the realism of the virtual painting process. The virtual painting system framework is built in Open Inventor by using Microsoft Visual C++, and Phantom Desktop Device is essential equipment. The experiment results indicate that this algorithm simulates the painting ink footprint in real time, user could control the whole virtual painting process via force feedback equipment and ink diffuses in a natural style. Since adding tactile feedback on the basis of the visual analogue and it is user friendly with simple control, the typical art effects of virtual painting are realized successfully. It is of great significance to further promotion on the development and progress of the virtual surface painting, and to improve our product design innovation capability.