public static List<Vector2> GetSmoothPoint(List<Vector2> targetArray, float precision, bool headtotial = true)
{
//1.获取采样点
if (precision == 1) { return targetArray; }
List<Vectorr2> samplePoint = new List<Vectorr2>();
int samcount = (int)((float)targetArray.Count * precision);
int interval = targetArray.Count / samcount;
for (int sam = 0; sam < samcount; sam++)
{
Vector2 get = targetArray[sam * interval];
samplePoint.Add(new Vectorr2(get.x, get.y));
}
samplePoint.Add(new Vectorr2(targetArray[targetArray.Count - 1].x, targetArray[targetArray.Count - 1].y));
//2.从采样点开始对用户画的点数据进行重采样
List<Vector2> tempToGl = new List<Vector2>();//准备交给Gl的数据
int glCount = targetArray.Count;
float inter = 1.0f / (float)glCount;
for (float a = 0; a < 1; )
{
Vectorr2[] test1 = new Vectorr2[samcount + 1];
samplePoint.CopyTo(test1);
Vectorr2 myV = GetBezierPoint(test1, a);
tempToGl.Add(new Vector2(myV.x, myV.y));
a += inter;
}
//3.将重建的点数据处理并交给Gl
if (headtotial)
tempToGl[tempToGl.Count - 1] = tempToGl[0];
return tempToGl;
//结束平滑代码
}
public static int GetCount(Vectorr2[] list)
{
int count = 0;
for (int a = 0; a < list.Length; a++)
{
if (list[a] != null) count++;
}
return count;
}
//t从0-1
public static Vectorr2 GetBezierPoint(Vectorr2[] pointList, float t)
{
int count = GetCount(pointList);
if (count == 1)
{
return pointList[0];
}
else
{
for (int a = 0; a < count - 1; a++)
{
pointList[a] = (1 - t) * pointList[a] + t * pointList[a + 1];
}
pointList[count - 1] = null;
return GetBezierPoint(pointList, t);
}
}