Simulation Of Virtual Fabric Handle And Deformation

With the development of human-computer interaction in the virtual reality, simple visualfabric deformation has can’t satisfy people’s needs, this paper creatively puts forward the forceand tactile feedback model based on the fabric deformation, which can make people feel thehandle of the fabric such as elastic and friction with force feedback equipment at the same timein seeing the fabric deformation, enhancing immersive of human-computer interaction.Firstly we introduced the meaning and purpose of the research on fabric deformation andtactile feedback and analyzed the present situation of the fabric deformation and tactile feedbackfrom domestic and overseas, and determined the goal and content of the research. According tothe fabric physical properties, this paper divided internal force model of spring-mass model intotension model, bending model and shear model which is used to simulate the tensile property,bending property and shear property of the fabric’s physical properties. We establish particledynamics equation and calculate the particle position with the explicit fourth-order Runge-Kuttamethod which is effective for both calculation and accuracy, and can meet the demand ofreal-time fabric deformation. We put forward2D texture mapping algorithm based ondeformation fabric add texture to deformation fabric which can improve the realism of the fabricsimulation.Secondly we put forward the AABB axial bounding box tree collision detection algorithmof the fabric which used to judge the virtual avatar and fabric contact or not by traversing thebounding box tree, the algorithm can improve the collision detection efficiency and reducecollision detection time. In order to calculate the contact force we put forward the point contactforce model based on the adsorption. Transfer the contact point which is located on the side orinternal of the triangle strips to recent vertices of the triangular strips. The model calculated andfeedback force to the operator quickly without delay.Thirdly we developed a virtual fabric real-time deformation and tactile feedback prototypesystem based on the above fabric deformation force tactile model for simulation experiment. Tosimulate one finger touch on the fabric behavior to observe the fabric deformation and feel the elastic and friction of the fabric. The experimental results show that the proposed fabricdeformation model and force tactile contact model can realize deformation of fabric and forcefeedback in real-time, and output force stability without pause feeling which can meet operator’svisual and tactile demand.Finally, summarized and prospected the paper.