Creation of customized animated 3D content is an important issue in web-based VR/AR environments that involve users with various requirements for the content, e.g., in education, training, tourism, cultural heritage and e-commerce. 3D content customization is a complex task, as it typically covers various content features such as geometry, structure and appearance. Although a number of tools enable modeling of 3D animations, they do not support on-demand animation customization to users’ requirements specified using semantic (application or domain-specific) concepts. Available solutions permit creation of 3D content in its final form, require technical knowledge and skills or are limited to a particular application domain, without possibilities to easily change the target application or domain. In this paper, we present a pipeline for creation of customized animated 3D content on the web. The pipeline uses rule-based representation of 3D content activities, which are composed into more complex animations. Animation composition is performed on-demand, using queries describing requirements in an arbitrary application domain. The use of knowledge representation adapts the approach to the current trends in the evolution of the web, including the semantic web. It enables exploration by reasoning on the content generated with users’ queries. Furthermore, it permits inference of tacit properties of animations from explicitly specified properties, thereby liberating the authors from specifying all necessary animation properties. The pipeline leverages an advanced motion capture system, 3D modeling tools and game engines. We have implemented and evaluated a web-based environment for on-demand animation composition. The proposed approach can be successfully used in multiple application areas on the web, in which 3D content components are intensively reconfigured according to requirements of different users.

在基于Web的VR / AR环境中，创建定制的动画3D内容是一个重要问题，该环境涉及对内容有各种要求的用户，例如在教育，培训，旅游，文化遗产和电子商务中。3D内容定制是一项复杂的任务，因为它通常涵盖各种内容功能，例如几何，结构和外观。尽管许多工具都可以对3D动画进行建模，但它们不支持针对使用语义（特定于应用程序或特定于域的）概念指定的用户需求的按需动画定制。可用的解决方案允许以其最终形式创建3D内容，需要技术知识和技能或限于特定的应用程序域，而无法轻松更改目标应用程序或域。在本文中，我们提出了在网络上创建自定义动画3D内容的管道。管道使用基于规则的3D内容活动表示，将其组成更复杂的动画。使用描述任意应用程序域中需求的查询，按需执行动画合成。知识表示的使用使该方法适应了包括语义网在内的网络发展中的当前趋势。它可以通过推理用户查询生成的内容来进行探索。此外，它允许从显式指定的属性推断动画的默认属性，从而使创作者不必指定所有必要的动画属性。该管道利用了先进的运动捕捉系统，3D建模工具和游戏引擎。我们已经实现并评估了基于Web的按需动画合成环境。所提出的方法可以成功地用于网络上的多个应用领域，其中根据不同用户的需求对3D内容组件进行了密集的重新配置。