Hi All I came into such a problem. When I view a tunnel model in the format of shapefile with osgviewer, I found it get twisted. And when I turn it around, the distortion also changes. Since the value of vertices in my model are a little big, like (34462366.949, 2667053.504, 756.321), and generated by translating, rotating with Matrixd. So, I'm wondering the problem is that osgviewer uses Matrixf? And, What should I do? Thanks!! Cheers! legeo
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