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Simulation of natural phenomena can improve the fidelity of virtual scene, which have been used widely in visual simulation system, city planning, distance education and other fields. The virtual campus can be created by excellent functions of 3D modeling on 3D Studio Max. Particle system is an effective method in simulation of real-time natural phenomena. On the basis of analyzing the realizing principle...
Haptic perception and display of softness are important parts of the haptic display technique, which is currently the frontier in teleoperation systems and human-computer interaction. A portable softness display device is developed for this study. The device can quickly change the displayed stiffness by controlling the deformable length of the elastic element. Ideally, when a human operator's fingertip...
The fatigue crack easily occurs in the nodes of the steel truss bridges which are under long-term load of moving train, it may endanger the safety of a bridge and even lead to its collapse. Therefore, it is essential to research on it. This paper introduces the detailed procedures of modeling a 3-D straight through crack in a node of a steel truss bridge by using the commercial FE software ANSYS with...
In this paper, computer technology is integrated with education of art and design. From the view of environmental art design, the teaching method of spatial design is explored. Computer-aided design is utilized in the teaching method of spatial design for helping students enhance the abilities of comprehension and creation. The teaching model is a whole system from perception of space to creation...
Branch modeling is one of the most important aspects in plant modeling, as branches build the structure of a plant. In this paper, we present a new method for branch modeling from two or four registered images using particle flows. Several strokes are drawn to represent branches on each image and the system produces a 3D branch model automatically. A trace analysis approach is proposed to establish...
The application of virtual maintenance technology can find the problems in products maintainability design as early as possible, assuring the qualities and reducing the life-cycle cost. So it is very important for the design of complicated equipments such as aircraft. Aimed at the requests of aircraft maintainability design, this paper compared two kinds of virtual maintenance modes, non-immersive...
Most current virtual maintenance systems are independent of CAD systems and the results in modification, maintainability analysis and evaluation can not be shared by CAD systems automatically and directly, reducing design efficiency and making information silo. The approach integrating virtual reality function into CAD system is adopted to build product information model of virtual maintenance integrated...
The simulation of deformable soft objects is a key challenge in virtual reality. This paper presents a novel parallel rhombus-chain-connected haptic deformation model based on physics. Because the rhombus in every chain structure unit are proportional in length, calculation cost is less and deformation modeling is easier for different soft objects in this model by only changing the length and angle...
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