'宣言 Public Overloads Function ComputePointAtLength( _ ByVal length As System.Single, _ ByRef unitTangentVector As Point2F _ ) As Point2F
public Point2F ComputePointAtLength( System.float length, out Point2F unitTangentVector )
パラメータ
- length
- The distance along the geometry of the point and tangent to find. If this distance is less then 0, this method calculates the first point in the geometry. If this distance is greater than the length of the geometry, this method calculates the last point in the geometry.
- unitTangentVector
- Whenthis method returns, contains a reference to the tangent vector at the specified distance along the geometry. If the geometry is empty, this vector contains NaN as its x and y values. You must allocate storage for this parameter.
戻り値の型
The location at the specified distance along the geometry. If the geometry is empty, this point contains NaN as its x and y values.