Abstract
The combination of electronic technology and virtual reality technology plays more and more role in real estate. Users can fully experience through electronic glove, electronic helmet and virtual roaming software. The projections of most building models in visual estate on the horizontal plane are rectangles. Based on the trait of building models, this article propose one way of fast collision detection algorithm for virtual estate roaming. This algorithm firstly divides the projection on the x_z plane of scene into grids; then obtains building models’ minimum bounding rectangles aligned with x_z axis and the grid where rectangle is located; finally judges whether the rectangle and the projection on x_z plane of view point collide or not by their spatial relationship. This article proposes solutions for minority particular building models such as arched door.
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