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1. 发明授权

US6166732A Distributed object oriented multi-user domain with multimedia presentations 失效
标题翻译：分布式面向对象的多用户域与多媒体演示
公开(公告)号：US6166732A
公开(公告)日：2000-12-26
申请号：US28545
申请日：1998-02-24
申请人： Don P. Mitchell , Steven M. Drucker , Kirk J. Marple , Manny Vellon
发明人： Don P. Mitchell , Steven M. Drucker , Kirk J. Marple , Manny Vellon
IPC分类号： G06F9/46 , G06F9/00
CPC分类号： G06F9/465
摘要： Updating of local object databases at client computers, dynamic inheritance, and event notification methods cooperate to provide a persistent object oriented multi-user domain capable of supporting multimedia presentation features for large numbers of users over conventional networks like the Internet. This includes distributing the objects of such a domain between a server and multiple clients and providing the objects with multimedia presentation features. Such a domain includes the persistence of conventional text-based MUDs and MOOs while also giving users the ability to vary or control a wide range of object attributes and properties. As a result, multimedia (e.g., graphical) presentation capabilities are combined with persistence and variability features of text-based MUDs and MOOs to provide a rich, dynamic, multimedia virtual world environment suitable for standard networks.
摘要翻译：在客户端计算机上更新本地对象数据库，动态继承和事件通知方法相结合，提供一种持久性面向对象的多用户域，能够通过常规网络（如Internet）为大量用户提供多媒体演示功能。这包括在服务器和多个客户端之间分配这样一个域的对象，并向对象提供多媒体呈现特征。这样的领域包括常规的基于文本的MUD和MOOs的持久化，同时还给用户改变或控制各种对象属性和属性的能力。结果，将多媒体（例如，图形）呈现能力与基于文本的MUD和MOO的持久性和可变性特征组合，以提供适合于标准网络的丰富，动态的多媒体虚拟世界环境。

2. 发明授权

US08253754B2 Sampling-efficient mapping of images 有权
标题翻译：图像采样高效映射
公开(公告)号：US08253754B2
公开(公告)日：2012-08-28
申请号：US09761558
申请日：2001-01-16
申请人： John M. Snyder , Don P. Mitchell
发明人： John M. Snyder , Don P. Mitchell
IPC分类号： G06T15/00
CPC分类号： G06T3/0031 , G06T15/04
摘要： Spherical-like textures are useful to simulate reflections and to generate arbitrary views from a point. For addressing simplicity, graphics systems typically require rectangular arrays of texture samples but an infinite variety of functions can be used to map these samples to a sphere-like object. A new metric is presented for measuring how well various maps use a given number of samples to provide the greatest worst-case frequency content of the image everywhere over the sphere. Using this metric and other important local properties, a comparison is presented of maps used previously in computer graphics as well as other mapping techniques borrowed from cartography. Based on these analysis several novel mapping techniques are presented that are fairly simple to implement and significantly more efficient in terms of the amount of processing and data required, and the quality of the resulting images. The novel metric and mapping techniques can be employed to analyze or otherwise improve the sampling efficiency of mapping textures onto any three-dimensional surface.
摘要翻译：球形样纹理可用于模拟反射并从一点产生任意视图。为了解决简单性，图形系统通常需要矩形纹理样本阵列，但是可以使用无限多种函数将这些样本映射到类似球体的对象。提出了一种新的度量标准，用于衡量各种地图使用给定数量的样本在全球各地提供图像最大最差情况的频率内容。使用此度量和其他重要的本地属性，提供了以前在计算机图形中使用的映射以及从制图借鉴的其他映射技术的比较。基于这些分析，提出了几种新颖的映射技术，其实现方式相当简单，并且在所需的处理和数据量以及所得到的图像的质量方面显着更有效。可以采用新颖的度量和映射技术来分析或改善将纹理映射到任何三维表面上的采样效率。

3. 发明授权

US6049805A Dynamic event mechanism for objects with associational relationships 失效
标题翻译：具有关联关系的对象的动态事件机制
公开(公告)号：US6049805A
公开(公告)日：2000-04-11
申请号：US28544
申请日：1998-02-24
申请人： Steven M. Drucker , Kirk J. Marple , Don P. Mitchell , Manny Vellon
发明人： Steven M. Drucker , Kirk J. Marple , Don P. Mitchell , Manny Vellon
IPC分类号： G06F9/46 , H04J3/02
CPC分类号： G06F9/542 , G06F9/465 , Y10S707/99931 , Y10S707/99943
摘要： A dynamic or latebound event mechanism provides event mechanism operation according to associational relationships among objects. In addition, objects may be responsive to event notification methods that are not initially within the original object definition, thereby allowing the event notification methods to be inherited by objects dynamically during run-time. One implementation utilizes the associations Self, Contents, and Peer for objects representing entities in a virtual world environment. Event notifications methods are promulgated among the objects corresponding to the entities in a sequence based upon the associational relationships between the entities.
摘要翻译：动态或迟到事件机制根据对象之间的关联关系提供事件机制操作。此外，对象可以响应于最初不在原始对象定义内的事件通知方法，从而允许事件通知方法在运行时动态地被对象继承。一个实现利用虚拟世界环境中表示实体的对象的自身，内容和对等体的关联。基于实体之间的关联关系，事件通知方法在与序列中的实体相对应的对象中公布。

4. 发明授权

US06173404B2 Software object security mechanism 失效
标题翻译：软件对象安全机制
公开(公告)号：US06173404B2
公开(公告)日：2001-01-09
申请号：US09028546
申请日：1998-02-24
申请人： Alex Colburn , Steven M. Drucker , Kirk J. Marple , Don P. Mitchell , Manny Vellon
发明人： Alex Colburn , Steven M. Drucker , Kirk J. Marple , Don P. Mitchell , Manny Vellon
IPC分类号： H04L932
CPC分类号： G06F21/62 , G06F21/54 , G06F2221/2145 , Y10S707/99944
摘要： A software object security mechanism addresses system security risks that arise due to interactions between software objects. Conditions are imposed on the accessing of targets by accessing object instances according to attributes of the accessing object and the target object that is being accessed. One security feature is that an owner identifier is incorporated into objects. The owner identifier includes identification of the user, person, or entity (e.g., corporation) who or that creates the object, or identification of a computer system used by the user, person, or entity to create the object definition. The owner identifier provides a basis for distinguishing the creator of an object from the user of that object. Another security feature is a set of access authorizations that allow different access rights to be made available to different object creators. In one implementation the access authorizations are All, Owner, and Exemplar. Another security feature is that exemplar identifiers are encoded into properties and methods in which the properties and methods are defined. Since exemplars may be authored by anyone and may be changed at run time, these security features insure that inheritance from exemplars of questionable lineage is safe. These security features prevent an exemplar in the hierarchy for an object or object instance from damaging the instance data.
摘要翻译：软件对象安全机制解决了由于软件对象之间的交互而产生的系统安全风险。根据访问对象和正在访问的目标对象的属性访问对象实例，对目标的访问施加条件。一个安全特征是所有者标识符被并入到对象中。所有者标识符包括用户，个人或实体（例如，公司）的身份，或创建对象的用户，用户，个人或实体用于创建对象定义的计算机系统的标识。所有者标识符提供了将对象的创建者与该对象的用户区分开的基础。另一个安全功能是一组访问权限，允许不同的访问权限可用于不同的对象创建者。在一个实现中，访问权限是全部，所有者和示例。另一个安全特征是，示例性标识符被编码成其中定义了属性和方法的属性和方法。由于示例可能由任何人创作，并且可能在运行时更改，这些安全功能可以确保来自可疑谱系范例的继承是安全的。这些安全功能可以防止对象或对象实例的层次结构中的示例损坏实例数据。

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