This method is preferred to SetPosition when setting all positions, as it is more efficient to set all positions using a single command than to set each position individually. Note that positionCount must be called before SetPositions. Also SetPositions ignores points with indices beyond positionCount.
Unity Scripting API
SetPositionよりも複数のpositionを変更するのに使用。
positionCountをSetPositions前に使用。
positionCountを超えるものは無視される。
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