// Build castle's world matrix.
D3DXMatrixRotationY(&Ry, D3DX_PI);
D3DXMatrixTranslation(&T, 8.0f, 35.0f, -80.0f);
mCastleWorld = Ry*T;

void PropsDemo::drawObject(Object3D& obj, const D3DXMATRIX& toWorld)
{
	// Transform AABB into the world space.
	
	AABB box;
	obj.box.xform(toWorld, box);

	// Only draw if AABB is visible.
	if( gCamera->isVisible( box ) )
	{
		HR(mFX->SetMatrix(mhWVP, &(toWorld*gCamera->viewProj())));
		
		D3DXMatrixInverse(&worldInvTrans, 0, &toWorld); //objectspace
		D3DXMatrixTranspose(&worldInvTrans, &worldInvTrans);
		HR(mFX->SetMatrix(mhWorldInvTrans, &worldInvTrans));
		HR(mFX->SetMatrix(mhWorld, &toWorld));

		for(UINT j = 0; j < obj.mtrls.size(); ++j)
		{
			HR(mFX->SetValue(mhMtrl, &obj.mtrls[j], sizeof(Mtrl)));
		
			// If there is a texture, then use.
			if(obj.textures[j] != 0)
			{
				HR(mFX->SetTexture(mhTex, obj.textures[j]));
			}

			// But if not, then set a pure white texture.  When the texture color
			// is multiplied by the color from lighting, it is like multiplying by
			// 1 and won't change the color from lighting.
			else
			{
				HR(mFX->SetTexture(mhTex, mWhiteTex));
			}
		
			HR(mFX->CommitChanges());
			HR(obj.mesh->DrawSubset(j));
		}
	}
}

drawObject(mCastle, mCastleWorld);