3D应用已经成为趋势,各种3D技术得到广泛的应用,许多3D应用都用到了3D虚拟摄像机.文中主要对3D虚拟摄像机进行了研究,通过调节3D摄像机来调节3D场景的渲染视角,这里主要研究的是通过3D摄像机的平移和旋转来调节渲染视角.由于对于不同的场景,场景的大小不同,场景中3D摄像机的位置和状态也不同,所以需要一种方法,能够对于用户的同一操作,根据不同场景,计算出相应的变换参数来操作3D摄像机.文中找到了一种调节3D摄像机的方法,该方法主要利用变换矩阵和几何关系来计算相应的变换参数,能够根据用户的操作自动计算相应参数来改变3D场景中虚拟摄像机的位置和状态,对3D摄像机进行调节,从而改变渲染视角,使交互更加方便.%3D applications have become the trend. A variety of 3D technology is widely used. And the 3D virtual camera are used in many 3D applications. It focuses on the research of 3D camera. Regulate the rendering perspective by regulating 3D camera and here are mainly through the 3D camera translation and rotation to regulate the rendering perspective. For different scenes,the sizes of scene are different, the position and status of 3D camera are also different. So need a method which can calculate the corresponding transformation parameters to operate 3D camera for different scenes. Find a method which uses the transformation matrix and geometry to calculate the corresponding transformation parameters to regulate the 3D camera. By this method,can calculate the 3D camera parameters automatically based on the user's operating. And then regulate the rendering perspective and make the interaction more convenient.
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