/** Projects a point to a line segment. This implementation is thread-safe. */
public static LFloat nearestSegmentPointSquareDistance
(LVector3 nearest, LVector3 start, LVector3 end, LVector3 point)
{
nearest.set(start);
var abX = end.x - start.x;
var abY = end.y - start.y;
var abZ = end.z - start.z;
var abLen2 = abX * abX + abY * abY + abZ * abZ;
if (abLen2 > 0) // Avoid NaN due to the indeterminate form 0/0
{
var t = ((point.x - start.x) * abX + (point.y - start.y) * abY + (point.z - start.z) * abZ) / abLen2;
var s = LMath.Clamp01(t);
nearest.x += abX * s;
nearest.y += abY * s;
nearest.z += abZ * s;
}
return(nearest.dst2(point));
}