//ray pick test
VOID RayIntersect()
{
DWORD m_dwNumIntersections; // Number of faces intersected

// Rayの設定
D3DXVECTOR3 vecStart,vecEnd,vecDirection;

vecStart=Thing[1].vecPosition;
vecEnd=D3DXVECTOR3(0,-1.0f,0);
vecDirection=vecEnd-vecStart;

BOOL bHit;
DWORD dwFace;
FLOAT fBary1, fBary2, fDist;

D3DXIntersect(Thing[2].pMesh, &vecStart, &vecDirection, &bHit, &dwFace, &fBary1,　&fBary2, &fDist, NULL, NULL);

if( bHit ) {
m_dwNumIntersections = 1;
MessageBox(0,"交差してます。",NULL,MB_OK);

} else {
m_dwNumIntersections = 0;
}
}