public static TimeSpan CalcStreamCommentReachToScreenLeftEdge(CommentUI second, double canvasWidth)
{
var secondDisplayTime = second.EndPosition - second.VideoPosition;
// 1msあたりの secondコメントの移動量
var secondSpeed = ((float)canvasWidth + second.TextWidth) / (float)secondDisplayTime.TotalMilliseconds;
// 時間 = 距離 ÷ 速さ
var timeToSecondCommentWidthMove = TimeSpan.FromMilliseconds(second.TextWidth / secondSpeed);
return(timeToSecondCommentWidthMove);
}
public static bool IsStreamCommentColide(CommentUI first, CommentUI second, double canvasWidth)
{
return(first.EndPosition > CalcStreamCommentReachToScreenLeftEdge(second, canvasWidth));
}