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2. 发明授权

EP0446293B1 IMAGE GENERATOR 失效
标题翻译：图像发生器
公开(公告)号：EP0446293B1
公开(公告)日：1997-07-16
申请号：EP90900934.2
申请日：1989-12-05
申请人： THOMSON TRAINING & SIMULATION LIMITED
发明人： BAKER, Stephen, John , COWDREY, Dennis, Alan , OLIVE, Graham, John , WOOD, Karl, Joseph
IPC分类号： G06T15/00
CPC分类号： G06T1/60 , G06T15/00 , G09B9/301
摘要： An apparatus for generating an image from data defining a model including a plurality of opaque and translucent features. The image is intended to represent a view of the model from a predetermined eyepoint and is made up from an array of screen space pixels. The image area is divided into an array of sub-areas each of which covers at least one pixel. For each feature in the model that is potentially visible from the eyepoint, a test is conducted to determine which of the sub-areas is at least partially covered by that feature. The position in screen space of at least one sampling point within each sub-area is determined. For each sub-area in turn, and for each sampling point a test is conducted to determine which of the features cover that sampling point. For each feature which covers a sampling point, a function of the distance from the eyepoint to that feature at the sampling point is determined. An output for each pixel within a sub-area is produced, the pixel output corresponding to the combined effects of the sampling point outputs for all sampling points which contribute to that pixel, and the pixel outputs are displayed.
摘要翻译：一种用于从定义包括多个不透明和半透明特征的模型的数据生成图像的设备。该图像旨在表示来自预定视点的模型视图，并且由屏幕空间像素阵列组成。图像区域被分成一组子区域，每个子区域覆盖至少一个像素。对于从眼点可能可见的模型中的每个特征，进行测试以确定哪个子区域至少部分被该特征覆盖。确定每个子区域内至少一个采样点在屏幕空间中的位置。对于每个子区域，并对每个采样点进行测试以确定哪些特征覆盖该采样点。对于覆盖采样点的每个特征，确定从采样点处的眼点到该特征的距离的函数。产生子区域内的每个像素的输出，该像素输出对应于对该像素有贡献的所有采样点的采样点输出的组合效果，并且显示像素输出。

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