A dynamic three-dimensional model of text noting based on collision detetion was presented against the background of alab-yard.There are many factors that affect text noting in three-dimensional scene,such as the distance between the text notes and the observer,whether the text notes occupy the same region of space with other models or not,whether the text notes were obscured by other models or not and so on.These factors were well balanced by using the model that presented in this paper.And collision detection technology was used to solve the problen that a text note may occupy the same space with other models,then three different ways of bounding box collision detection technology were tested to verify intersect rates.The results show that the model could be well used in large three-dimensional scene.%以板坯库为背景,给出了基于碰撞检测的三雄文字动态注记模型.在三维的大场景中,影响文字注记的因素有距观察者距离、不同模型间占用相同空间、模型间相互遮挡等.提出的模型很好地权衡7这些影响因素,并应用碰撞检测技术解决了不同模型占用相同空间的问题,检验了三种不同的包围盒碰撞检测技术的检测速率.实验结果表明,该模型可以很好地应用于三维大场景的主字注记.
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