internal static unsafe void ConvertToD3DMATRIX(
/* in */ Matrix *matrix,
/* out */ D3DMATRIX *d3dMatrix
)
{
*d3dMatrix = D3DMATRIXIdentity;
float * pD3DMatrix = (float *)d3dMatrix;
double *pMatrix = (double *)matrix;
// m11 = m11
pD3DMatrix[0] = (float)pMatrix[0];
// m12 = m12
pD3DMatrix[1] = (float)pMatrix[1];
// m21 = m21
pD3DMatrix[4] = (float)pMatrix[2];
// m22 = m22
pD3DMatrix[5] = (float)pMatrix[3];
// m41 = offsetX
pD3DMatrix[12] = (float)pMatrix[4];
// m42 = offsetY
pD3DMatrix[13] = (float)pMatrix[5];
}
internal static unsafe void ConvertFromD3DMATRIX(
/* in */ D3DMATRIX *d3dMatrix,
/* out */ Matrix *matrix
)
{
float * pD3DMatrix = (float *)d3dMatrix;
double *pMatrix = (double *)matrix;
//
// Convert first D3DMatrix Vector
//
pMatrix[0] = (double)pD3DMatrix[0]; // m11 = m11
pMatrix[1] = (double)pD3DMatrix[1]; // m12 = m12
// Assert that non-affine fields are identity or NaN
//
// Multiplication with an affine 2D matrix (i.e., a matrix
// with only _11, _12, _21, _22, _41, & _42 set to non-identity
// values) containing NaN's, can cause the NaN's to propagate to
// all other fields. Thus, we allow NaN's in addition to
// identity values.
Debug.Assert(pD3DMatrix[2] == 0.0f || Single.IsNaN(pD3DMatrix[2]));
Debug.Assert(pD3DMatrix[3] == 0.0f || Single.IsNaN(pD3DMatrix[3]));
//
// Convert second D3DMatrix Vector
//
pMatrix[2] = (double)pD3DMatrix[4]; // m21 = m21
pMatrix[3] = (double)pD3DMatrix[5]; // m22 = m22
Debug.Assert(pD3DMatrix[6] == 0.0f || Single.IsNaN(pD3DMatrix[6]));
Debug.Assert(pD3DMatrix[7] == 0.0f || Single.IsNaN(pD3DMatrix[7]));
//
// Convert third D3DMatrix Vector
//
Debug.Assert(pD3DMatrix[8] == 0.0f || Single.IsNaN(pD3DMatrix[8]));
Debug.Assert(pD3DMatrix[9] == 0.0f || Single.IsNaN(pD3DMatrix[9]));
Debug.Assert(pD3DMatrix[10] == 1.0f || Single.IsNaN(pD3DMatrix[10]));
Debug.Assert(pD3DMatrix[11] == 0.0f || Single.IsNaN(pD3DMatrix[11]));
//
// Convert fourth D3DMatrix Vector
//
pMatrix[4] = (double)pD3DMatrix[12]; // m41 = offsetX
pMatrix[5] = (double)pD3DMatrix[13]; // m42 = offsetY
Debug.Assert(pD3DMatrix[14] == 0.0f || Single.IsNaN(pD3DMatrix[14]));
Debug.Assert(pD3DMatrix[15] == 1.0f || Single.IsNaN(pD3DMatrix[15]));
*((MatrixTypes *)(pMatrix + 6)) = MatrixTypes.TRANSFORM_IS_UNKNOWN;
}
public static unsafe D3DMATRIX *Transformation2D(
D3DMATRIX *pOut, D3DXVECTOR2 *pScalingCenter,
float ScalingRotation, D3DXVECTOR2 *pScaling,
D3DXVECTOR2 *pRotationCenter, float Rotation,
D3DXVECTOR2 *pTranslation)
{
return(NativeMethods.D3DXMatrixTransformation2D(
pOut, pScalingCenter,
ScalingRotation, pScaling,
pRotationCenter, Rotation,
pTranslation));
}
internal unsafe virtual void ConvertToD3DMATRIX(/* out */ D3DMATRIX *milMatrix)
{
Matrix matrix = Value;
MILUtilities.ConvertToD3DMATRIX(&matrix, milMatrix);
}
public static extern unsafe D3DMATRIX *D3DXMatrixTransformation2D(
D3DMATRIX *pOut, D3DXVECTOR2 *pScalingCenter,
float ScalingRotation, D3DXVECTOR2 *pScaling,
D3DXVECTOR2 *pRotationCenter, float Rotation,
D3DXVECTOR2 *pTranslation);
