确定该立体视图矩阵是否适合进行单通道剔除。
如果调用 Camera.SetStereoViewMatrix 来手动设置立体视图矩阵，则摄像机将使用该检查来确定矩阵的相似度是否足以启用单通道剔除（这样性能更佳）。矩阵需要朝向眼睛中心方向并且在眼距之内。
如果该检查失败，则\
• 摄像机为每只眼睛执行单独剔除。\
• 阴影无法在两眼间共享。\
• 无法使用单通道渲染。
另请参阅：Camera.SetStereoViewMatrix
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