A Study of an Animation Database for Automatic Generation of Computer Animation

计算机动画可以被认为是一系列帧。框架是三维计算机图形，它使观众周围的风景可视化。为了对计算机动画进行建模，从数据库的角度研究了帧的结构模型。并实现了一个面向对象的计算机图形实体数据库，取得了如下成果.场景由三种计算机图形实体组成。它们是要被可视化的三维物体、相机和光源。这些实体由面向对象的数据库管理系统ONTOS建模，并通过partonomy组合成一个框架。部分分类法允许用户查询计算机图形内容，而不需要复杂的图像识别和理解过程.基于Tcl/Tk用户界面构建语言，建立了动画数据库的图形用户界面。这个界面允许用户通过点击窗口上的按钮和定点设备来轻松地操作数据库对象.计算机动画的产生是为了测量产生一个帧所花费的时间，而检索三维物体的过程效率很低，这类空间查询是最重要的研究课题之一，因为基于计算机动画的用户界面的需求逐年增加.三维物体自适应行为的数据库建模。在这种情况下，提取一组方程来表示行为。根据环境自动选择合适的方程是约束条件，是该项目中最重要的问题之一，将于明年进行研究。

Computer Animation can be considered as a sequence of frames. Frames are three dimensional computer graphics which visualize scenery around viewers. In order to model computer animation, structural model of frames is studied in terms of databases. And an object-oriented database for computer graphicsentities is implemented and the following results are obtained.1. Scenery consists of three kinds of computer graphics entities. They are three dimensional objects which are to be visualized, cameras, and light sources. They are modelled by an object-oriented database management system ONTOS.These entities are combined to define a frame by partonomy. The partonomy allows users to query computer graphics contents without complicated image recognition and understanding procedures.2. Graphical user interface for the animation database is built based on Tcl/Tk user interface building language. This interface alows users to manipulate database objects easily by clicing buttons on windows with pointing devices.3. computer animation is generated to measure elapsed time for generating a frame and inefficient procedures for retrieving the three dimensional objects to be visualized are found. These kinds of spatial queries are to be one of the most important research topics, because the necessity for user interfacs based on computer animation increase year by year.4. Database modeling of adaptive behaviors of three dimensional objects for their adaptive behaviors. In this case, a set of equations are extracted to represent the behaviors. Sutomatic selection of suitable equations are constraints according to their environment is one of the most important issues in this project and is going to be studied next year.