DirectX-11实例缓冲区返回E_INVALID_ARGS

Question

各位。我已经开始在我的游戏引擎中添加实例了。这是我创建的一个泛型函数，这样我就可以传入一个实例缓冲区指针和一些矩阵，以及要绘制的实例列表。然而，在它的第一个循环中，缓冲区是空的，所以它试图初始化它，但失败了，并返回HR = E_INVALID_ARGS。我不是很确定参数的哪一部分是无效的。

我们的目标是为每个实例传递两个XMFLOAT4X4形式的4X4矩阵。

"sizeofXMFLOAT4X4“变量只是一个完整性检查，看看它读取了多少字节(64，4字节*4浮点/ vec *4 vec= 64)。

如果有人能发现这里可能出现的问题并指出它，我将不胜感激。如果您需要更多信息，请告诉我。谢谢。

void StaticSceneryListClass::UpdateInstanceBuffer(ID3D11Buffer *pInstanceBuffer, XMFLOAT4X4 VPMat, XMFLOAT4X4 tileMat,  vector<StaticSceneryStruct> culledInstanceList)
{
//Pass this the buffer you want to update, the VPMat for the frame, and a list of instances to draw and it will fill the buffer with the stuff and things. 
//If the buffer is not initialized yet, it will be initialized too.

//first, create the data needed.
vector<XMFLOAT4X4> instanceMats;

for (int i = 0; i < culledInstanceList.size(); i++)
{
    XMFLOAT4X4 WorldMat = xmCon->MatTranspose(xmCon->MatMultiply(culledInstanceList[i].worldMat, tileMat));
    XMFLOAT4X4 WVP = xmCon->MatTranspose(xmCon->MatMultiply(WorldMat, VPMat));
    instanceMats.push_back(WVP);
    instanceMats.push_back(WorldMat);
}

if (pInstanceBuffer == NULL)
{
    //buffer not initialized yet, initialize it.
    D3D11_BUFFER_DESC instBuffDesc;
    ZeroMemory(&instBuffDesc, sizeof(instBuffDesc));
    sizeofXMFLOAT4X4 = sizeof(XMFLOAT4X4);
    instBuffDesc.Usage = D3D11_USAGE_DYNAMIC;
    instBuffDesc.ByteWidth = sizeofXMFLOAT4X4 * 2 * culledInstanceList.size();
    instBuffDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
    instBuffDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
    instBuffDesc.MiscFlags = 0;

    D3D11_SUBRESOURCE_DATA instData;
    ZeroMemory(&instData, sizeof(instData));

    instData.pSysMem = &instanceMats[0];
    HRESULT hr = graphicsPointers.pdev->CreateBuffer(&instBuffDesc, &instData, &pInstanceBuffer);

    if (FAILED(hr))
    {
        //Fails here with E_INVALID_ARG
        MessageBox(NULL, "Failed to create instance buffer!", "StaticSceneryList", MB_OK);
    }
}
else
{
    //buffer already initialized, need to use resource may and unmap.
    D3D11_MAPPED_SUBRESOURCE mappedResource;
    ZeroMemory(&mappedResource, sizeof(D3D11_MAPPED_SUBRESOURCE));

    //  Disable GPU access to the vertex buffer data.
    graphicsPointers.pdevcon->Map(pInstanceBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
    //  Update the vertex buffer here.
    memcpy(mappedResource.pData, &instanceMats[0], sizeof(XMFLOAT4X4) * 2 * culledInstanceList.size());
    //  Reenable GPU access to the vertex buffer data.
    graphicsPointers.pdevcon->Unmap(pInstanceBuffer, 0);
}

UPDATE1: 12/2/2017 2:02 CST今天早上我一直在运行各种调试测试，结果很有趣。我尝试隔离这个问题，发现为数据传入null或为缓冲区传入新的本地指针没有任何作用。我打开了调试层，但它没有为create buffer语句提供任何输出。我试着使用缓冲区描述的参数，看看它会做什么，但它们给了我一个错误。我添加了一个捕获，如果剔除的列表大小为0，即使它不是16的倍数，它也会偶尔通过，但它实际上从未产生过工作缓冲区。事实上，它通常仍然会失败，因为...S_OK?？失败( HR )正在下降，HR为S_OK，这没有多大意义。当我查看buffer指针的内存值时，它从null变为有一个地址，但它不会被"if not null，release and set to null“块捕获。

这样做的一个有趣的副作用是，它会导致各种形式的巨大内存泄漏。进程内存在大约10秒内以近乎线性的速度攀升到3 3gb以上(我在这一点上关闭了程序，它仍然非常灵敏)。

当然，我似乎也偶尔会遇到这种情况，但这种情况似乎永远不会发生，因为缓冲区是否已经初始化的代码还没有触发。

以下是当前更新后的代码：

void StaticSceneryListClass::UpdateInstanceBuffer(ID3D11Buffer *pInstanceBuffer, XMFLOAT4X4 VPMat, XMFLOAT4X4 tileMat, vector<StaticSceneryStruct> culledInstanceList)
{
//Pass this the buffer you want to update, the VPMat for the frame, and a list of instances to draw and it will fill the buffer with the stuff and things. 
//If the buffer is not initialized yet, it will be initialized too.

//Skip this process if there aren't any instances to draw
if (culledInstanceList.size() > 0)
{
    //first, create the data needed.
    vector<XMFLOAT4X4> instanceMats;
    for (int i = 0; i < culledInstanceList.size(); i++)
    {
        XMFLOAT4X4 WorldMat = xmCon->MatTranspose(xmCon->MatMultiply(culledInstanceList[i].worldMat, tileMat));
        XMFLOAT4X4 WVP = xmCon->MatTranspose(xmCon->MatMultiply(WorldMat, VPMat));
        instanceMats.push_back(WVP);
        instanceMats.push_back(WorldMat);
    }

    if (pInstanceBuffer == NULL)
    {
        //buffer not initialized yet, initialize it.
        D3D11_BUFFER_DESC instBuffDesc;
        ZeroMemory(&instBuffDesc, sizeof(instBuffDesc));
        bytewidth = sizeof(XMFLOAT4X4) * 2 * culledInstanceList.size();
        if (bytewidth % 16 != 0)
        {
            //hasn't fallen into here yet, which makes sense.
            MessageBox(NULL, "Instance Buffer Byte Width Not a multiple of 16", "StaticSceneryList", MB_OK);
        }

        instBuffDesc.Usage = D3D11_USAGE_DYNAMIC;
        instBuffDesc.ByteWidth =  bytewidth;
        instBuffDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
        instBuffDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
        instBuffDesc.MiscFlags = 0;

        D3D11_SUBRESOURCE_DATA instData;
        ZeroMemory(&instData, sizeof(instData));

        instData.pSysMem = &instanceMats[0];

        HRESULT hr = graphicsPointers.pdev->CreateBuffer(&instBuffDesc, &instData, &pInstanceBuffer);
        //HRESULT hr = graphicsPointers.pdev->CreateBuffer(&instBuffDesc, &instData, &debugInstanceBuffer); //DEBUG
        if (FAILED(hr))
        {
            //Fails here with S_OK lulwut
            MessageBox(NULL, "Failed to create instance buffer!", "StaticSceneryList", MB_OK);
            if (pInstanceBuffer != NULL)
            {
               //This doesn't seem to trigger even though the address is not 0x0000etc
                pInstanceBuffer->Release();
                pInstanceBuffer = NULL;
            }
        }
        else
        {
            //occasionally gets here but it doesn't seem to stick
            MessageBox(NULL, "Successfully created instance buffer.", "StaticSceneryList", MB_OK);
        }
    }
    else
    {
        //never seems to get to here.
        //buffer already initialized, need to use resource may and unmap.
        D3D11_MAPPED_SUBRESOURCE mappedResource;
        ZeroMemory(&mappedResource, sizeof(D3D11_MAPPED_SUBRESOURCE));

        //  Disable GPU access to the vertex buffer data.
        graphicsPointers.pdevcon->Map(pInstanceBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
        //  Update the vertex buffer here.
        memcpy(mappedResource.pData, &instanceMats[0], sizeof(XMFLOAT4X4) * 2 * culledInstanceList.size());
        //  Reenable GPU access to the vertex buffer data.
        graphicsPointers.pdevcon->Unmap(pInstanceBuffer, 0);
    }
}//if there is anything to draw