//-------------------------------------------------------------------------------
// handle mouse input for the light rotation
//
// Axes: global x/y axis
//-------------------------------------------------------------------------------
private void HandleMouseInputLightRotate()
{
Point mousePos;
mousePos = Control.MousePosition;
mousePos = PointToClient(mousePos);
g_mousePos.X = mousePos.X;
g_mousePos.Y = mousePos.Y;
if (g_bMousePressedR)
{
int nXDiff = -(g_mousePos.X - g_LastmousePos.X);
int nYDiff = -(g_mousePos.Y - g_LastmousePos.Y);
Vector3 v = new Vector3(1.0f,0.0f,0.0f);
Matrix mTemp;
mTemp = Matrix.RotationAxis(v, Geometry.DegreeToRadian((float)nYDiff / 2.0f));
D3DXMatrixRotationAxis( (D3DXMATRIX*) &mTemp, (D3DXVECTOR3*)&v, D3DXToRadian((float)nYDiff / 2.0f));
Vector3.TransformCoordinate(
D3DXVec3TransformCoord((D3DXVECTOR3*)&g_avLightDirs[0],
(const D3DXVECTOR3*)&g_avLightDirs[0],(const D3DXMATRIX*)&mTemp);
v = aiVector3D(0.0f,1.0f,0.0f);
D3DXMatrixRotationAxis( (D3DXMATRIX*) &mTemp, (D3DXVECTOR3*)&v, D3DXToRadian((float)nXDiff / 2.0f));
D3DXVec3TransformCoord((D3DXVECTOR3*)&g_avLightDirs[0],
(const D3DXVECTOR3*)&g_avLightDirs[0],(const D3DXMATRIX*)&mTemp);
}
}
private static extern D3DXMATRIX *D3DXMatrixTranslation(
D3DXMATRIX *pOut,
Single x,
Single y,
Single z
);
private static extern D3DXMATRIX *D3DXMatrixMultiply(
D3DXMATRIX *pOut,
D3DXMATRIX *pM1,
D3DXMATRIX *pM2
);
private static extern D3DXMATRIX *D3DXMatrixRotationY(
D3DXMATRIX *pOut,
Single Angle
);