private static List <Vector2> ExpandPolygon(List <Vector2> original, float length = 1.0f)
{
List <Vector2> tempOrigin = new List <Vector2>();
tempOrigin.AddRange(original);
if (GeoPolygonUtils.CalcualetArea(tempOrigin) < 0)
{
tempOrigin.Reverse();
}
List <Vector2> result = new List <Vector2>();
for (int i = 0; i < tempOrigin.Count; ++i)
{
int j = i + 1;
if (j == tempOrigin.Count)
{
j = 0;
}
int k = i - 1;
if (k == -1)
{
k = tempOrigin.Count - 1;
}
Vector2 vk = tempOrigin[k] - tempOrigin[i];
Vector2 vj = tempOrigin[j] - tempOrigin[i];
Vector2 dir = vk.normalized + vj.normalized;
dir.Normalize();
if (GeoPolygonUtils.IsConvexAngle(tempOrigin[k], tempOrigin[i], dir + tempOrigin[i]))
{
dir = -dir;
}
result.Add(tempOrigin[i] + dir * length);
}
return(result);
}
public void Initialize(float scale)
{
mScale = scale;
mArea = GeoPolygonUtils.CalcualetArea(mPolygonData);
if (mArea < 0)
{
mPolygonData.Reverse();
mArea = -mArea;
}
mAABB = GeoPolygonUtils.CalculateAABB(mPolygonData);
mMaxSize = mAABB.mMax - mAABB.mMin;
mIsConvex = IsAllConvex();
Decompose();
mLeftRectangle.Clear();
}