/// <summary>
/// 画贝塞尔曲线
/// </summary>
/// <param name="vh"></param>
/// <param name="sp">起始点</param>
/// <param name="ep">结束点</param>
/// <param name="cp1">控制点1</param>
/// <param name="cp2">控制点2</param>
/// <param name="lineWidth">曲线宽</param>
/// <param name="lineColor">曲线颜色</param>
public static void DrawCurves(VertexHelper vh, Vector3 sp, Vector3 ep, Vector3 cp1, Vector3 cp2,
float lineWidth, Color lineColor, float smoothness)
{
var dist = Vector3.Distance(sp, ep);
var segment = (int)(dist / (smoothness <= 0 ? 2f : smoothness));
ChartHelper.GetBezierList2(ref s_CurvesPosList, sp, ep, segment, cp1, cp2);
if (s_CurvesPosList.Count > 1)
{
var start = s_CurvesPosList[0];
var to = Vector3.zero;
var dir = s_CurvesPosList[1] - start;
var diff = Vector3.Cross(dir, Vector3.forward).normalized *lineWidth;
var startUp = start - diff;
var startDn = start + diff;
for (int i = 1; i < s_CurvesPosList.Count; i++)
{
to = s_CurvesPosList[i];
diff = Vector3.Cross(to - start, Vector3.forward).normalized *lineWidth;
var toUp = to - diff;
var toDn = to + diff;
DrawPolygon(vh, startUp, toUp, toDn, startDn, lineColor);
startUp = toUp;
startDn = toDn;
start = to;
}
}
}
