一种新的堤坝三维透视模型构建方法及应用研究

A New Method of Building Three-Dimensional Perspective Model for Dams and Its Application

提出一种堤坝三维透视模型构建方法.该方法以数字地面模型生成的地形图为基础数据,首先采用标高投影理论,建立堤坝坡脚线的数学模型;然后应用透视投影理论,建立地形与地物相一致的三维透视数学模型,并使建立的模型与VC++OPENGL相融合,实现堤坝的三维透视的实时交互显示.通过实例验证,本方法实用、经济、快捷.

This paper proposes a new method of building three-dimension prospective models for dams. Taking the topographic map generated by digital topographic models as the basic data, this method first adopts the elevation projection theory to build the mathematical model for the toe line of dam slopes, and then, applies the perspective projection theory to build a three-dimension mathematical model with the Landscape consistent with the ground objects. This method combines the model with VC++ OPENGL and realizes the real-time interactive display of the three-dimension perspective of dams. Tests and experiments have shown that this mothod is practical, economical and quick.