Transforming a Point

This example demonstrates how to use the Vector3 and Matrix classes to transform a point. A matrix transform can include scaling, rotating, and translating information.

The Complete Sample

The code in the topic shows you the technique. You can download a complete code sample for this topic, including full source code and any additional supporting files required by the sample.

Download TransformPoint_Sample.zip.

Transforming a Point with a Matrix

To transform a point

1. Create a Matrix by using CreateRotationY or one of the other Create methods.
2. Pass the point and the Matrix to the Vector3.Transform method.

static Vector3 RotatePointOnYAxis(Vector3 point, float angle)
{
    // Create a rotation matrix that represents a rotation of angle radians.
    Matrix rotationMatrix = Matrix.CreateRotationY(angle);

    // Apply the rotation matrix to the point.
    Vector3 rotatedPoint = Vector3.Transform(point, rotationMatrix);

    return rotatedPoint;
}

See Also

Matrix Creation Methods

CreateRotationX
CreateRotationY
CreateRotationZ
CreateScale
CreateTranslation