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基于混合式绘制技术的分布式虚拟环境系统 总被引:1,自引:0,他引:1
给出了一个基于分布式计算技术的虚拟环境原型系统.系统根据当前摄像机的运动趋势,首先利用预测技术实时地确定下帧图象摄像机的方位,然后分布式地采用基于几何的快速绘制算法来生成预测图象,最后采用图象warping算法来实时生成前后预测图象间的画面过渡.由于引入了几何信息,因而本系统允许用户对虚拟景物进行直接交互操作,从而克服了传统基于图象的图形绘制技术只能处理静态场景的缺陷.实验结果表明,本系统对场景复杂性的依赖程度低,能在中等计算能力的工作站上实现复杂场景的实时交互. 相似文献
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A real-time rendering algorithm based on a hybrid rendering scheme is presented. The key frames of the virtual scene are generated with a geometry-based approach, then a non-linear transformation to all visible points of each frame near the current viewpoint is performed to reveal their coplanar characteristics and a hierarchical polygon ap-proximation of the local scene is set up. Any intermediate image between the two key frames could be obtained by re-projecting these polygons onto the view plane related to the current viewpoint. The gaps that might appear on the inter-mediate image are filled through bi-directional backward image warping. Experimental results show that our approach is insensitive to the complexity of the scene and has a satisfactory performance. 相似文献
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