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);
}
public static float PointClosest2Triangle3(Vector3 p1, Vector3 p2, Vector3 p3, ref Vector3 p, ref Vector3 close)
{
GeoPlane plane = new GeoPlane(p1, p2, p3);
float d = GeoPlaneUtils.PointClosestToPlaneAbs(plane.mNormal, plane.mD, p, ref close);
if (GeoTriangleUtils.IsPointInTriangle3(p1, p2, p3, ref close))
{
return(d);
}
else
{
Vector3 close1 = new Vector3();
float dt = PointClosest2PlaneTriangle2(p1, p2, p3, plane, ref p, ref close1);
return((float)Math.Sqrt(d * d + dt * dt));
}
}
public static bool IsSegmentInsectOrOverlapTriangle2(Vector2 seg1, Vector2 seg2, Vector2 p1, Vector2 p2, Vector2 p3, ref GeoInsectPointArrayInfo insect)
{
// 在三角形内部
if (GeoTriangleUtils.IsPointInTriangle2(p1, p2, p3, ref seg1) && GeoTriangleUtils.IsPointInTriangle2(p1, p2, p3, ref seg2))
{
insect.mIsIntersect = true;
insect.mHitGlobalPoint.mPointArray.Add(new Vector3(seg1.x, seg1.y, 0.0f));
insect.mHitGlobalPoint.mPointArray.Add(new Vector3(seg2.x, seg2.y, 0.0f));
return(true);
}
// 相交测试(不包含 边的重叠)
bool isInsect = GeoSegmentUtils.IsSegmentInsectTriangle2(seg1, seg2, p1, p2, p3, ref insect);
if (!isInsect)
{
// 边重叠 测试
isInsect = GeoSegmentUtils.IsSegmentOverlapTriangle2(seg1, seg2, p1, p2, p3, ref insect);
}
return(insect.mIsIntersect);
}