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DirectX纹理显示不正确。

c++visual-c++directxdirectx-10
3

我终于成功将纹理应用到了一个立方体上，但是很遗憾，它的显示效果不正确，如下图所示：

alt text

无论如何，我不确定问题出在哪里。我的第一个猜测是可能是我的UV映射或者顶点位置不正确。如果有人能够检查并确保这些内容正确，那就太好了。第一个元素是顶点位置，第二个是颜色，第三个是纹理UV。

struct VertexPos
{
    D3DXVECTOR3 pos;
    D3DXVECTOR4 color;
    D3DXVECTOR3 normal;
    D3DXVECTOR2 texCoord;
};

 // Create vertex buffer
     VertexPos vertices[] =
    {
        // BACK SIDES
        { D3DXVECTOR3(-5.0f,  5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        { D3DXVECTOR3(-5.0f, -5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,1.0)},
        { D3DXVECTOR3(5.0f,  5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f)  ,D3DXVECTOR2(0.0,1.0)},

        { D3DXVECTOR3(5.0f,  5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        { D3DXVECTOR3(-5.0f, -5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,1.0)},
        { D3DXVECTOR3(5.0f,  -5.0f, 5.0f), D3DXVECTOR4(1.0f,0.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,1.0)},

        // 2 FRONT SIDE
        { D3DXVECTOR3(-5.0f,  5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        { D3DXVECTOR3(5.0f,  5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f)  ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        { D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        { D3DXVECTOR3(5.0f,  5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f) ,D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f,  -5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,1.0)},

        // 3
        { D3DXVECTOR3(-5.0f, 5.0f,  5.0f), D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        { D3DXVECTOR3(5.0f, 5.0f,  5.0f),  D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(-5.0f, 5.0f, -5.0f), D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        { D3DXVECTOR3(-5.0f, 5.0f, -5.0f), D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        { D3DXVECTOR3(5.0f, 5.0f, 5.0f), D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f, 5.0f, -5.0f),  D3DXVECTOR4(0.0f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        // 4
        { D3DXVECTOR3(-5.0f, -5.0f,  5.0f), D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        { D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f, -5.0f,  5.0f),  D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        { D3DXVECTOR3(5.0f, -5.0f,  5.0f),  D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        { D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f, -5.0f, -5.0f),  D3DXVECTOR4(1.0f,0.5f,0.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        // 5
        { D3DXVECTOR3(5.0f,  5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        { D3DXVECTOR3(5.0f,  5.0f,  5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        { D3DXVECTOR3(5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        { D3DXVECTOR3(5.0f,  5.0f,  5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        { D3DXVECTOR3(5.0f, -5.0f,  5.0f), D3DXVECTOR4(0.0f,1.0f,0.5f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        // 6
        {D3DXVECTOR3(-5.0f,  5.0f, -5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,0.0)},
        {D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        {D3DXVECTOR3(-5.0f,  5.0f,  5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},

        {D3DXVECTOR3(-5.0f,  5.0f,  5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
        {D3DXVECTOR3(-5.0f, -5.0f, -5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(1.0,0.0)},
        {D3DXVECTOR3(-5.0f, -5.0f,  5.0f), D3DXVECTOR4(0.5f,0.0f,1.0f,0.0f),D3DXVECTOR3(0.0f,0.0f,0.0f) ,D3DXVECTOR2(0.0,1.0)},
    };

我的第二个猜测可能是我在运行程序时收到的错误。但我不知道从哪里开始解决。以下是该错误的描述。

D3D10: WARNING: ID3D10Device::Draw: Vertex Buffer at the input vertex slot 0 is not big enough for what the Draw*() call expects to traverse. This is OK, as reading off the end of the Buffer is defined to return 0. However the developer probably did not intend to make use of this behavior.  [ EXECUTION WARNING #356: DEVICE_DRAW_VERTEX_BUFFER_TOO_SMALL ]

不确定是什么，但这是我的顶点布局描述

//Create Layout
D3D10_INPUT_ELEMENT_DESC layout[] = {
    {"POSITION",0,DXGI_FORMAT_R32G32B32_FLOAT, 0 , 0, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"COLOR",0,DXGI_FORMAT_R32G32B32A32_FLOAT, 0 , 12, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"NORMAL",0,DXGI_FORMAT_R32G32B32A32_FLOAT, 0 , 28, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"TEXCOORD",0, DXGI_FORMAT_R32G32_FLOAT, 0 , 44, D3D10_INPUT_PER_VERTEX_DATA, 0}
};

UINT numElements = (sizeof(layout)/sizeof(layout[0]));
modelObject.numVertices = sizeof(vertices)/sizeof(VertexPos);

for(int i = 0; i < modelObject.numVertices; i += 3)
{
    D3DXVECTOR3 out;

    D3DXVECTOR3 v1 = vertices[0 + i].pos;
    D3DXVECTOR3 v2 = vertices[1 + i].pos;
    D3DXVECTOR3 v3 = vertices[2 + i].pos;

    D3DXVECTOR3 u = v2 - v1;
    D3DXVECTOR3 v = v3 - v1;

    D3DXVec3Cross(&out, &u, &v);
    D3DXVec3Normalize(&out, &out);

    vertices[0 + i].normal = out;
    vertices[1 + i].normal = out;
    vertices[2 + i].normal = out;
}

//Create buffer desc
D3D10_BUFFER_DESC bufferDesc;
bufferDesc.Usage = D3D10_USAGE_DEFAULT;
bufferDesc.ByteWidth = sizeof(VertexPos) * modelObject.numVertices;
bufferDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
bufferDesc.CPUAccessFlags = 0;
bufferDesc.MiscFlags = 0;

D3D10_SUBRESOURCE_DATA initData;
initData.pSysMem = vertices;
//Create the buffer

HRESULT hr = mpD3DDevice->CreateBuffer(&bufferDesc, &initData, &modelObject.pVertexBuffer);
if(FAILED(hr))
    return false;
1
我看这里没有太多的DirectX专业人士... - numerical25
建议：使用索引原语。 “我看这里没有很多DirectX的人。” 你一开始没有提供截图，也不是每个人都想安装Vista / Win7来获取DX10。 - SigTerm
是的，我知道索引基元更好，但我仍在学习阶段，所以通常只是根据我正在阅读的资源进行操作。而且我不知道很多开发人员仍在使用9版本。他们正在准备转向DX11，难道不应该让大家跟上吗？请告诉我一些相关信息，毕竟我只是个新手。 - numerical25
1个回答
3

问题已经解决。问题出在我的输入布局描述上。

D3D10_INPUT_ELEMENT_DESC layout[] = {
    {"POSITION",0,DXGI_FORMAT_R32G32B32_FLOAT, 0 , 0, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"COLOR",0,DXGI_FORMAT_R32G32B32A32_FLOAT, 0 , 12, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"NORMAL",0,DXGI_FORMAT_R32G32B32A32_FLOAT, 0 , 28, D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"TEXCOORD",0, DXGI_FORMAT_R32G32_FLOAT, 0 , 44, D3D10_INPUT_PER_VERTEX_DATA, 0}
};

我的顶点法线设置为RGBA，但在我的顶点结构中定义为RGB或XYZ，这使它不准确。我的偏移量也是错误的。

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