public static ArcModelMini GetArcParametersFromThreePoints(UnitPoint startPoint, UnitPoint midPoint, UnitPoint endPoint) { ArcModelMini arcModel = new ArcModelMini(); arcModel.Clockwise = HitUtil.IsClockwiseByCross(startPoint, midPoint, endPoint); arcModel.Center = HitUtil.CenterPointFrom3Points(startPoint, midPoint, endPoint); arcModel.Radius = (float)HitUtil.Distance(arcModel.Center, startPoint); arcModel.StartAngle = (float)HitUtil.RadiansToDegrees(HitUtil.LineAngleR(arcModel.Center, startPoint, 0)); float EndAngle = (float)HitUtil.RadiansToDegrees(HitUtil.LineAngleR(arcModel.Center, endPoint, 0)); arcModel.SweepAngle = (float)HitUtil.CalAngleSweep(arcModel.StartAngle, EndAngle, arcModel.Clockwise); return(arcModel); }