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我就看不出来啊,它里面的alpha假如是正的话那就好理解,假如是负的是什么意思呢?还有为什么有两个判断要加alpha?这两个我都没想清楚In Reply To:到底是怎样? Posted by:js05 at 2005-05-24 22:04:45 Followed by:
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