The main contents of this paper are model design of a virtual camera, property research to controlled movement, potential visible surface sets reduction and interactive rendering technology.

其内容涉及虚拟相机的概念设计，受控运动的特性研究，潜在可见表面集的缩减技术和交互式演示技术。

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But it's not just the bounce and speed of the ball off the clay surface that sets it apart from other courts, and makes the French Open an elusive tournament for some players.

CNN: Tennis interactive: Why clay is so different

Sometimes, the touchpad provides direct access to radio pre-sets, with preset numbers lighting up and showing through its translucent surface.

FORBES: 2012 Audi A7 Test Drive and Review - High-Tech Meets High Style

The straight sets win came on the British no 1's least favourite surface of clay, and followed fellow Briton Greg Rusedksi's defeat on Monday.

BBC: Henman impressive on clay