Vector3dVectorAngle Method (Vector3d, Vector3d, Plane) |

Computes the angle on a plane between two vectors.

**Namespace:** Rhino.Geometry**Assembly:** RhinoCommon (in RhinoCommon.dll) Version: 5.1.50000.0 (5.0.20693.0)

Syntax public static double VectorAngle(
Vector3d a,
Vector3d b,
Plane plane
)

Public Shared Function VectorAngle (
a As Vector3d,
b As Vector3d,
plane As Plane
) As Double

#### Parameters

- a
- Type: Rhino.GeometryVector3d

First vector. - b
- Type: Rhino.GeometryVector3d

Second vector. - plane
- Type: Rhino.GeometryPlane

Two-dimensional plane on which to perform the angle measurement.

#### Return Value

Type:

DoubleOn success, the angle (in radians) between a and b as projected onto the plane; RhinoMath.UnsetValue on failure.

See Also