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3-D rotation interaction is an indispensable function of 3-D imaging system of laser scanning, therefore it is also a hot topic of 3-D interaction research. The drag of mouse can be reflected by the on-screen movement of the cursor, when the dragged object is a 3-D object, the contradiction between it and the 2-D screen exposes. Aiming to resolve this problem, arc ball algorithm was used basing on...
In response to a continually advancing threat incurred by untrusted codes from Internet, various virtualization-based technologies have been proposed. Such technologies utilize a software layer, a virtual machine monitor or hyper visor, to achieve the highest privilege in a computer system. Generally, they construct isolated execution environments to run the untrusted code while shielding the other...
As the current fairing algorithms can hardly fair the curve automatically, this paper presents an automatic fairing algorithm for B-spline curves. Firstly, the wavelet part of the curve which is also called the wavelet curve is extracted by setting different wavelet space. Then, the detail part of the wavelet curve which is also called the detail wavelet part can be achieved by applying lower degree...
The title is used for the research and practice for the engineering practice ability of undergraduate students who are learning engineering subject. We improve practice and design ability of the students by setting “Specialty Design”, reforming “Course Design”, “Graduation Project”, “Teaching Practice” and “The second Classroom”. We construct a new model of engineering education with “Design, Practice...
In order to improve the educational function of e-learning, a virtual classroom with intelligent virtual tutor has been developed. Architecture of the virtual classroom system is presented. The intelligent virtual tutor can perceive environment and make its own decision to enhance the interaction between tutor and remote students in some degree. The virtual tutor is emotive, which can help remote...
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