osg夾點圖形創建

參照Osg ：TabPlaneDragger類 源代碼，函數createHandleNode中如下部分被代碼 sg::Vec3Array* vertices = new     geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,vertices->size()));       osg::Vec3Arr

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