internal static IList <WW.Math.Point3D> smethod_2(
IList <WW.Math.Point3D> vertices,
ILeader leader,
out Vector3D startDerivative,
out Vector3D endDerivative)
{
if (vertices != null && vertices.Count >= 2)
{
List <WW.Math.Point3D> point3DList = new List <WW.Math.Point3D>((IEnumerable <WW.Math.Point3D>)vertices);
double effectiveArrowSize = leader.GetEffectiveArrowSize();
Vector3D vector3D = point3DList[1] - point3DList[0];
double length = vector3D.GetLength();
startDerivative = vector3D / length;
endDerivative = leader.Direction;
if (leader.HookLineDirection == HookLineDirection.Same)
{
endDerivative = -endDerivative;
}
endDerivative.Normalize();
if (DxfLeader.smethod_7(leader, vertices) && leader.LeaderArrowBlock == null && length >= effectiveArrowSize)
{
point3DList[0] += vector3D * (effectiveArrowSize / length);
}
return((IList <WW.Math.Point3D>)point3DList);
}
startDerivative = endDerivative = Vector3D.Zero;
return((IList <WW.Math.Point3D>)null);
}
internal static Matrix4D smethod_6(
ILeader leader,
IList <WW.Math.Point3D> vertices,
Vector3D zaxis)
{
WW.Math.Point3D vertex1 = vertices[0];
WW.Math.Point3D vertex2 = vertices[1];
Matrix4D toWcsTransform = DxfUtil.GetToWCSTransform(zaxis);
Vector3D v1 = new Vector3D(toWcsTransform.M00, toWcsTransform.M10, toWcsTransform.M20);
Vector3D v2 = new Vector3D(toWcsTransform.M01, toWcsTransform.M11, toWcsTransform.M21);
Vector3D u = vertex1 - vertex2;
double angle = System.Math.Atan2(Vector3D.DotProduct(u, v2), Vector3D.DotProduct(u, v1));
double effectiveArrowSize = leader.GetEffectiveArrowSize();
return(Transformation4D.Translation((Vector3D)vertex1) * toWcsTransform * Transformation4D.RotateZ(angle) * Transformation4D.Scaling(effectiveArrowSize, effectiveArrowSize, effectiveArrowSize));
}
internal static bool smethod_7(ILeader leader, IList <WW.Math.Point3D> vertices)
{
if (!leader.ArrowHeadEnabled || leader.ArrowSize <= 0.0)
{
return(false);
}
bool flag = false;
if (vertices.Count >= 2)
{
WW.Math.Point3D vertex = vertices[0];
double lengthSquared = (vertices[1] - vertex).GetLengthSquared();
double effectiveArrowSize = leader.GetEffectiveArrowSize();
flag = effectiveArrowSize * effectiveArrowSize <= 0.25 * lengthSquared + 8.88178419700125E-16;
}
return(flag);
}