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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