D3DXMatrixShadow

Builds a matrix that projects geometry into a plane, as if casting a shadow from a light. See Remarks.

D3DXMatrixShadow( _ 
    MOut As D3DMATRIX, _ 
    VLight As D3DVECTOR4, _ 
    Plane As D3DPLANE)

Parameters

MOut

D3DMATRIX type that is the result of the operation, a matrix that projects geometry into a plane. See Remarks.

VLight

D3DVECTOR4 type describing the light's position.

Plane

The source D3DPLANE type.

Error Codes

If the function fails, an error is raised and Err.Number can be set to one of the following values.

For information on trapping errors, see the Microsoft® Visual Basic® Error Handling topic.

Remarks

The D3DXMatrixShadow function builds a matrix that projects geometry into a plane. If Vlight.w is 0, then the ray from the origin to Vlight represents a directional light. If it is 1, then Vlight represents a point light.