public bool GetSphereSplineIntersection(Vector3 sphCenter, float sphRadius, int startIndex, int searchDir,
out Vector3 pos, out Vector3 normal, out Vector3 tangent, out int segmentIndex)
{ // searchDir est égal à 1 ou -1
searchDir = (int)Mathf.Sign(searchDir); // au cas où searchDir serait autre chose que 1 ou -1
pos = Vector3.zero;
normal = Vector3.zero;
tangent = Vector3.zero;
segmentIndex = -1;
int n = 0;
while (n < NPts)
{
int tmpIndex1 = startIndex + n * searchDir;
while (tmpIndex1 < 0)
{
tmpIndex1 += NPts;
}
int tmpIndex2 = startIndex + (n + 1) * searchDir;
while (tmpIndex2 < 0)
{
tmpIndex2 += NPts;
}
Vector3 pt1 = m_Pts[tmpIndex1];
Vector3 pt2 = m_Pts[tmpIndex2];
Vector3 normal1 = Vector3.zero, normal2 = Vector3.zero;
if (m_HasNormals)
{
normal1 = m_Normals[tmpIndex1];
normal2 = m_Normals[tmpIndex2];
}
Vector3 tangent1 = Vector3.zero, tangent2 = Vector3.zero;
tangent1 = m_Tangents[tmpIndex1];
tangent2 = m_Tangents[tmpIndex2];
Vector3 intersectionPt = Vector3.zero;
if (Intersections.OrientedSegmentSphereIntersection_3D(pt1, pt2, sphCenter, sphRadius, out intersectionPt))
{
pos = intersectionPt;
float k = Vector3.Distance(intersectionPt, pt1) / Vector3.Distance(pt1, pt2);
if (m_HasNormals)
{
normal = Vector3.Slerp(normal1, normal2, k);
}
tangent = Vector3.Slerp(tangent1, tangent2, k).normalized;
segmentIndex = searchDir > 0 ? tmpIndex1 : tmpIndex2;
return(true);
}
n++;
}
return(false);
}
