把cube形狀 靜態的collision繪制出來發現少了一些face，這決不是顯示的問題，缺少的部分也不能進行碰撞檢測
查了官方網站，似乎這個問題并沒有得到解決，至少在目前的1.53版中依然存在這個問題。
http://www.newtondynamics.com/forum/viewtopic.php?t=3176&start=0&postdays=0&postorder=asc&highlight=newtontreecollisionaddface
另外，在論壇上我得知做newton的人只有一個，雖然有些bug，但還真的是很佩服作者，這張帖子的回復，顯得作者十分的敬業，態度非常的誠懇，這個問題回頭我還得再去確認一下。
GraphicObject *teapot = new GraphicObject("box");
GraphicObjects.push_back(teapot);
D3DXCreateBox(gd3dDevice, 5.0f, 5.0f, 5.0f, &(teapot->pMesh), NULL);
//D3DXCreateSphere(gd3dDevice, 5.0f, 5, 5, &(teapot->pMesh), NULL);
//D3DXCreateTeapot(gd3dDevice, &(teapot->pMesh), NULL);
//D3DXCreateBox(gd3dDevice, 10.0f, 10.0, 10.0f, &(teapot->pMesh), NULL);
WORD* pIndices;
LK3D::Vertex::Normal_Vertex* pVertices;
collision = NewtonCreateTreeCollision(nWorld, NULL);
NewtonTreeCollisionBeginBuild(collision);
DWORD numFaces = pGraphicObj->pMesh->GetNumFaces();
teapot->pMesh->LockIndexBuffer(0, (void**)&pIndices);
teapot->pMesh->LockVertexBuffer(0, (void**)&pVertices);
for( DWORD i=0; i<numFaces; i++ )
{
D3DXVECTOR3 face[3];
face[0] = D3DXVECTOR3(pVertices[pIndices[3*i+0]]._x, pVertices[pIndices[3*i+0]]._y, pVertices[pIndices[3*i+0]]._z);
face[1] = D3DXVECTOR3(pVertices[pIndices[3*i+1]]._x, pVertices[pIndices[3*i+1]]._y, pVertices[pIndices[3*i+1]]._z);
face[2] = D3DXVECTOR3(pVertices[pIndices[3*i+2]]._x, pVertices[pIndices[3*i+2]]._y, pVertices[pIndices[3*i+2]]._z);
//boxlocation.TransformTriplex (face, sizeof (dVector), face, sizeof (dVector), 3);
int sz = sizeof (D3DXVECTOR3);
NewtonTreeCollisionAddFace(collision, 3, (FLOAT*)&face[0].x, sz, 0);
}
teapot->pMesh->UnlockVertexBuffer();
teapot->pMesh->UnlockIndexBuffer();
NewtonTreeCollisionEndBuild(collision, 1);
用上cube發現少了三個面，用上其它的幾何體也都是同樣的問題，有缺失的部分
如果：pVertices[pIndices[3*i+0]]._x + 0.001缺失的部分又會少一點，很奇怪