| 摘要 |
<p>In a computer image generating system, the choice of a path for a vehicle model over a landscape is not restricted. Objects and features in an image to be displayed are defined by polygons. Plumb vectors, having a predetermined relationship with the vehicle model, are used to obtain samples of the terrain at the intersection between the vectors and polygons defining the group in the vicinity of the vehicle model. The vectors may sample in advance of the vehicle model in the direction of motion or under the vehicle model. The polygons may be encoded with characteristics of the terrain they define so that appropriate noise cues can be generated from information extracted at the intersection of the plumb vectors and polygons. Predetermined ones of the sample points are interpolated for inferring the contour and slope of the terrain before interaction between the vehicle model and interpolated terrain is determined. The display of an image is modified in response to the real-time interaction between the vehicle model and local topology to reflect such interaction at a predetermined viewpoint. An image generating system includes terrain sampling means, sampling processing means, display control means and audio generator means for presenting images with respect to a predetermined viewpoint wherein the images reflect real-time interaction between the vehicle model and the local topology of the image.</p> |
