共查询到18条相似文献,搜索用时 328 毫秒
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三维的听觉信息在多模态交互与集成的虚拟环境巾得到了广泛的应用.以基于HLA平台的装甲兵对抗演示系统为背景,探讨了三维的听觉信息生成和显示问题,根据系统对声音显示节点的要求,研究了扬声器阵列的立体声显示原理、影响人对声音感知的因素、虚拟环境中声音的定位以及声音的距离仿真.基于矢量基幅值相移(VBAP)的方法,提出了在长方体的演示厅空间中建立扬声器阵列的方法,并在系统仿真过程中将虚拟环境中声源分为循环声、非循环声和环境背景声,并对它们的实现和处理过程以及实体可听距离等问题进行了研究. 相似文献
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听觉通道是虚拟环境系统中最重要的接口之一,真实感声音模拟是构建高度真实感和沉浸感虚拟环境不可或缺的一部分。DirectSound对三维真实感声音模拟提供了很好的支持,是目前在真实感声音生成领域非常优秀的开发接口。该文简要介绍了真实感声音生成的相关理论,使用DirectSound模拟真实感声音涉及到的几个接口对象,详细论述了影响虚拟环境中三维声音听觉效果的因素。以及如何利用DirectSound程序开发接口实现这些因素对三维声音听觉效果的影响。最后给出了使用DirectSound生成三维真实感声音的具体步骤,并开发了一个简单的测试程序。 相似文献
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声音仿真技术是虚拟现实技术的一个重要组成部分。它主要研究如何在虚拟环境中模拟现实中实体真实状态的声音,以加强虚拟环境给人的沉浸感。随着计算机技术的飞速发展以及DSP的广泛应用,数字法声音仿真将成为声音仿真技术的主流,但其不同实现方法却各有利弊。为了更有效地将不同实现方法的优势有机地结合起来,该文以DirectSound组件在声音仿真中的使用方法和wav文件的结构为基础,基于对飞行训练器音响系统仿真的研究,介绍了目前声音仿真技术中的不同实现方法,分析了各自的优缺点及不同音效应采用的仿真方法,最后以发动机声音仿真为例详细介绍了声音的建模合成方法的实现从而展示了本方法的优越性。 相似文献
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虚拟环境中的空间立体声生成算法研究 总被引:2,自引:0,他引:2
三维听觉信息可为虚拟环境中的人导航漫游以及监控、识别目标。该文对如何为人实时生成虚拟环境中的三维声音信息进行了探讨。提出了基于空间矢量的幅值相移算法,该算法可把声音定位在三维空间中的任意位置。从物理声学说明了增益系数规格化的必要性,并推导了其几何数学意义。对扬声器阵列的布局,声源运动、距离变化的仿真以及多声源的数字混音进行了阐述。虚拟战场中的空间立体声实时生成为一应用实例。 相似文献
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本文提出了一种基于装配技术的管网三维可视化的方法,分析并构建了管网场景仿真系统的功能模块和体系结构。针对CAD系统和虚拟环境之间的数据转换问题,采用了层次结构模型来表达管件模型。在虚拟环境中, 通过对模型进行凸包分解,实现了精确碰撞和干涉检测。系统实现效果表明,基于装配技术和碰撞检测技术的管网可视化方法可更为灵活、逼真的实现管网的三维再现。 相似文献
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基于可重用的支持三维建模仿真的组件设计 总被引:1,自引:0,他引:1
提出了一种面向对象的支持三维图形可重用的组件层次设计方法,分析了组件的性能、设计方法和图元算法,实现了基于OpenGL的支持三维虚拟场景、建模和运动仿真的组件设计,描述了实体的运动层次链接关系和数据结构,并实现了虚拟环境的数控铣床建模和运动仿真。 相似文献
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基于OpenGL的三维建筑设计组件的设计与实现 总被引:1,自引:1,他引:1
本文提出了一种面向对象的支持三维图形可重用的组件层次设计方法,分析了组件的性能、设计方法和图元算法,实现了基于OpenGL的支持三维虚拟场景、建模和运动仿真的组件设计,描述了实体的运动层次链接关系和数据结构,并实现了虚拟环境的建筑物建模和运动仿真。 相似文献
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虚拟现实技术在视景仿真系统中的应用 总被引:10,自引:6,他引:4
利用虚拟现实技术可以在仿真系统中构建出逼真的三维虚拟环境。讨论了虚拟现实技术的涵义和特征,重点研究了在实现一个视景仿真系统时所用到的关键虚拟现实技术,并给出了虚拟现实技术在一个军事模拟训练系统的三维战场视景仿真中的具体应用。 相似文献
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三维虚拟加工环境及其关键技术的研究 总被引:11,自引:1,他引:10
在分析虚拟制造特点的基础上,提出了三维可视化虚拟加工环境的系统结构,介绍了支持三维建模仿真的组件设计、基于装配模型的三维实体建模方法、NC代码解析器的设计方案以及基于毛坯表面三角片离散化的加工过程仿真算法,并开发了虚拟加工环境原型系统,该系统能够实时地反映零件虚拟原型的加工成形过程仿真,并进行可加工性分析。 相似文献
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Evaluation of a low-cost 3D sound system for immersive virtual reality training systems 总被引:2,自引:0,他引:2
Doerr KU Rademacher H Huesgen S Kubbat W 《IEEE transactions on visualization and computer graphics》2007,13(2):204-212
Since head mounted displays (HMD), datagloves, tracking systems, and powerful computer graphics resources are nowadays in an affordable price range, the usage of PC-based "virtual training systems" becomes very attractive. However, due to the limited field of view of HMD devices, additional modalities have to be provided to benefit from 3D environments. A 3D sound simulation can improve the capabilities of VR systems dramatically. Unfortunately, realistic 3D sound simulations are expensive and demand a tremendous amount of computational power to calculate reverberation, occlusion, and obstruction effects. To use 3D sound in a PC-based training system as a way to direct and guide trainees to observe specific events in 3D space, a cheaper alternative has to be provided, so that a broader range of applications can take advantage of this modality. To address this issue, we focus in this paper on the evaluation of a low-cost 3D sound simulation that is capable of providing traceable 3D sound events. We describe our experimental system setup using conventional stereo headsets in combination with a tracked HMD device and present our results with regard to precision, speed, and used signal types for localizing simulated sound events in a virtual training environment 相似文献
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《Behaviour & Information Technology》2012,31(6):435-446
As current virtual environments are less visually rich than real-world environments, careful consideration must be given to their design to ameliorate the lack of visual cues. One important design criterion in this respect is to make certain that adequate navigational cues are incorporated into complex virtual worlds. In this paper we show that adding 3D spatialized sound to a virtual environment can help people navigate through it. We conducted an experiment to determine if the incorporation of 3D sound (a) helps people find specific locations in the environment, and (b) influences the extent to which people acquire spatial knowledge about their environment. Our results show that the addition of 3D sound did reduce time taken to locate objects in a complex environment. However, the addition of sound did not increase the amount of spatial knowledge users were able to acquire. In fact, the addition of 3D auditory sound cues appears to suppress the development of overall spatial knowledge of the virtual environment. 相似文献
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As current virtual environments are less visually rich than real-world environments, careful consideration must be given to their design to ameliorate the lack of visual cues. One important design criterion in this respect is to make certain that adequate navigational cues are incorporated into complex virtual worlds. In this paper we show that adding 3D spatialized sound to a virtual environment can help people navigate through it. We conducted an experiment to determine if the incorporation of 3D sound (a) helps people find specific locations in the environment, and (b) influences the extent to which people acquire spatial knowledge about their environment. Our results show that the addition of 3D sound did reduce time taken to locate objects in a complex environment. However, the addition of sound did not increase the amount of spatial knowledge users were able to acquire. In fact, the addition of 3D auditory sound cues appears to suppress the development of overall spatial knowledge of the virtual environment. 相似文献
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某型坦克驾驶模拟器视景软件设计与开发 总被引:1,自引:0,他引:1
使用仿真系统对坦克驾驶员进行驾驶训练,具有安全、无污染、不受天候限制、节约训练成本等诸多优点.AL-ZARRAR坦克驾驶训练模拟器是一个用于出口的、能完成驾驶模拟训练任务的仿真系统.其视景仿真程序采用MultiGen Creato三维实体建模工具、OpenGVS4.5三维实时视景驱动引擎、DirectX 8.0的DirectSound3D声音播放控制程序,使用了六点地形匹配、微光夜视模拟、像素级光照模拟、伪粒子系统降雨模拟等先进技术,成功地营造出了一个交互性好、沉浸感强的虚拟驾驶环境.该软件已得到实际应用,效果良好. 相似文献