设置 3D 空间化计算(衰减、多普勒效应等)对该 AudioSource 的影响程度。0.0 使声音变成全 2D 效果,1.0 使其变成全 3D。
除了确定将该 AudioSource 处理为 2D 还是 3D 源以外,该属性对于在这两种模式之间进行变换也很有用。
3D 空间计算在确定立体声平移后进行,可以配合 panStereo 使用。
对于在靠近监听器的过程中应逐渐变成正常 2D 效果的声音来说,在这两种模式间变换非常有用。
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