塔吊模拟
//滑车 box_slider = new osg::Box( osg::Vec3(center_x + tower_width*(14.0f), center_y, index_z - tower_height*1.4f + column_width*4.0f), tower_width*1.0f, tower_length*1.0f, tower_height*0.2f);
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原文：https://www.cnblogs.com/herd/p/15259835.html