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本文介绍了作者在将 OpenGL应用于三维地质模型可视化中的经验与体会。首先介绍了用 OpenGL显示三维地质模型的几个技术关键，包括模型绘制、投影变换、取景、 TIN表面显示、旋转、颜色与材质等。然后介绍了笔者基于 OpenGL的裁剪变换和缓冲区累加功能提出的“切片合成法”的原理、用途、应用注意事项和应用于煤田地质勘探中煤层底版等高线图制做的实例。
This article introduces the author’s experience and experience in applying OpenGL to 3D geological model visualization. First of all, several key technologies of displaying 3D geological model with OpenGL are introduced, including model drawing, projection transformation, viewfinder, TIN surface display, rotation, color and material. Then introduced the author based on the OpenGL cutting transformation and the cumulative function of the buffer slice synthesis principle, purpose, application precautions and applied to geological exploration coal seam floor contour map example.