private static bool InTriangle(EarPoint pointToCheck, EarPoint earTip, EarPoint earTipPlusOne, EarPoint earTipMinusOne)
{
bool isIntriangle = GeoTriangleUtils.IsPointInTriangle2(earTip.mPoint, earTipPlusOne.mPoint, earTipMinusOne.mPoint, ref pointToCheck.mPoint);
if (isIntriangle)
{
if (pointToCheck.mPoint == earTip.mPoint || pointToCheck.mPoint == earTipPlusOne.mPoint || pointToCheck.mPoint == earTipMinusOne.mPoint) // 端点
{
return(false);
}
}
return(isIntriangle);
}
private static bool DoIntersect(EarPoint a, EarPoint b, EarPoint c, EarPoint d)
{
GeoInsectPointInfo insect = new GeoInsectPointInfo();
bool isInsect = GeoSegmentUtils.IsSegmentInsectSegment2(a.mPoint, b.mPoint, c.mPoint, d.mPoint, ref insect);
if (isInsect)
{
float x = insect.mHitGlobalPoint[0];
float y = insect.mHitGlobalPoint[1];
if ((x == c[0] && y == c[1]) || (x == d[0] && y == d[1])) // 端点检测
{
return(false);
}
}
return(isInsect);
}
public float SqrDot(EarPoint rhs)
{
return(mPoint[0] * rhs.mPoint[0] + mPoint[1] * rhs.mPoint[1]);
}
public float Dot(EarPoint rhs)
{
return(Vector2.Dot(mPoint, rhs.mPoint));
}
public float Cross(EarPoint rhs)
{
return((mPoint[0] * rhs.mPoint[1]) - (mPoint[1] * rhs.mPoint[0]));
}
public LinkedListNode <EarPoint> InsertPoint(float x, float y, LinkedListNode <EarPoint> cur)
{
EarPoint newPoint = new EarPoint(mNumberOfPoints++, x, y);
return(mHead.AddAfter(cur, newPoint));
}
