InstanceBuffer在DX 11_0中不起作用
InstanceBuffer not working in DX 11_0
所以我遇到了这个问题，我已经坚持了几个星期了，因为实例缓冲区在我的DX 11_0应用程序中不起作用，顶点缓冲区和索引缓冲区只起作用，但由于某种原因，即使实例缓冲区是用S_OK创建的，并且没有抛出错误，也没有任何东西传递到实例缓冲区。
以下是实例缓冲区的定义和创建
instanceDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
instanceDesc.ByteWidth = sizeof(InstanceVertex2) * MAX_INSTANCES;
instanceDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
instanceDesc.MiscFlags = 0;
instanceDesc.StructureByteStride = 0;
instanceDesc.Usage = D3D11_USAGE_DYNAMIC;
instanceData.pSysMem = new InstanceVertex2[MAX_INSTANCES];
instanceData.SysMemPitch = 0;
instanceData.SysMemSlicePitch = 0;
//create the instance buffer
result = device->CreateBuffer(&instanceDesc, &instanceData, &m_instanceBuffer);
if (FAILED(result))
{
return false;
}
这是多边形布局
//vertex position, by vertex
polygonLayout[0].AlignedByteOffset = 0;
polygonLayout[0].Format = DXGI_FORMAT_R32G32B32_FLOAT;
polygonLayout[0].InputSlot = 0;
polygonLayout[0].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
polygonLayout[0].InstanceDataStepRate = 0;
polygonLayout[0].SemanticIndex = 0;
polygonLayout[0].SemanticName = "POSITION";
//uv coords, by vertex
polygonLayout[1].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[1].Format = DXGI_FORMAT_R32G32_FLOAT;
polygonLayout[1].InputSlot = 0;
polygonLayout[1].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
polygonLayout[1].InstanceDataStepRate = 0;
polygonLayout[1].SemanticIndex = 0;
polygonLayout[1].SemanticName = "TEXCOORD";
//texture ID, by instance
polygonLayout[2].AlignedByteOffset = 0;
polygonLayout[2].Format = DXGI_FORMAT_R32_SINT;
polygonLayout[2].InputSlot = 1;
polygonLayout[2].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[2].InstanceDataStepRate = 1;
polygonLayout[2].SemanticIndex = 0;
polygonLayout[2].SemanticName = "TEXTUREID";
//color, by instance
polygonLayout[3].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[3].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[3].InputSlot = 1;
polygonLayout[3].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[3].InstanceDataStepRate = 1;
polygonLayout[3].SemanticIndex = 0;
polygonLayout[3].SemanticName = "COLOR";
//UVAdd , by instance
polygonLayout[4].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[4].Format = DXGI_FORMAT_R32G32_FLOAT;
polygonLayout[4].InputSlot = 1;
polygonLayout[4].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[4].InstanceDataStepRate = 1;
polygonLayout[4].SemanticIndex = 0;
polygonLayout[4].SemanticName = "UVADD";
//UVMultiply, by instance
polygonLayout[5].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[5].Format = DXGI_FORMAT_R32G32_FLOAT;
polygonLayout[5].InputSlot = 1;
polygonLayout[5].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[5].InstanceDataStepRate = 1;
polygonLayout[5].SemanticIndex = 0;
polygonLayout[5].SemanticName = "UVMULTIPLY";
//matrix row 1
polygonLayout[6].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[6].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[6].InputSlot = 1;
polygonLayout[6].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[6].InstanceDataStepRate = 1;
polygonLayout[6].SemanticIndex = 0;
polygonLayout[6].SemanticName = "MATRIX";
//matrix row 2
polygonLayout[7].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[7].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[7].InputSlot = 1;
polygonLayout[7].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[7].InstanceDataStepRate = 1;
polygonLayout[7].SemanticIndex = 1;
polygonLayout[7].SemanticName = "MATRIX";
//matrix row 3
polygonLayout[8].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[8].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[8].InputSlot = 1;
polygonLayout[8].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[8].InstanceDataStepRate = 1;
polygonLayout[8].SemanticIndex = 2;
polygonLayout[8].SemanticName = "MATRIX";
//matrix row 4
polygonLayout[9].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[9].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[9].InputSlot = 1;
polygonLayout[9].InputSlotClass = D3D11_INPUT_PER_INSTANCE_DATA;
polygonLayout[9].InstanceDataStepRate = 1;
polygonLayout[9].SemanticIndex = 3;
polygonLayout[9].SemanticName = "MATRIX";
numElements = sizeof(polygonLayout) / sizeof(polygonLayout[0]);
//create the input layout
result = device->CreateInputLayout(polygonLayout, numElements, vertexShaderBuffer->GetBufferPointer(), vertexShaderBuffer->GetBufferSize(), &m_layout);
if (FAILED(result))
{
MessageBox(hwnd, TEXT("Failed to create the input layout"), TEXT("Error initializaing shader"), MB_OK);
return false;
}
这是我实际更新实例缓冲区（它是动态的）
result = deviceContext->Map(m_instanceBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &data);
if (FAILED(result))
{
return false;
}
instancesPtr = (InstanceVertex2*)data.pData;
memcpy(instancesPtr, (void*)instances, sizeof(&m_vertices[0]));
//now un map
deviceContext->Unmap(m_instanceBuffer, 0);
最后，这是我将缓冲区放入设备上下文的代码
//set the buffers
buffers[0] = m_vertexBuffer;
buffers[1] = m_instanceBuffer;
//set the strides
strides[0] = sizeof(InstanceVertex1);
strides[1] = sizeof(InstanceVertex2);
//set the offsets
offsets[0] = 0;
offsets[1] = 0;
//set the vertex buffers
deviceContext->IASetVertexBuffers(0, 2, buffers, strides, offsets);
//set the index buffers
deviceContext->IASetIndexBuffer(m_indexBuffer, DXGI_FORMAT_R32_UINT, 0);
deviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
这看起来确实有很多代码需要查看，但我不知道到底出了什么问题，我过去有实例化和动态顶点缓冲区可以正常工作，而且由于某种原因，当我将它们组合在一起时，我无法使其正常工作。我有nvidea-nsight，所以我可以直接查看顶点着色器和缓冲区，从我所看到的情况可以看出，没有任何东西被传递到实例缓冲区。如果有人愿意给我任何帮助或建议，我将不胜感激，这样我就能解决我的问题。
我想明白了，问题不在于实例缓冲区的初始化，而在于我更新它的方式，我将包括它的答案，以便其他人能够获得类似问题的帮助。
我改了：
result = deviceContext->Map(m_instanceBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &data);
if (FAILED(result))
{
return false;
}
instancesPtr = (InstanceVertex2*)data.pData;
memcpy(instancesPtr, (void*)instances, sizeof(&m_vertices[0]));
//now un map
deviceContext->Unmap(m_instanceBuffer, 0);
收件人：
result = deviceContext->Map(m_instanceBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &data);
if (FAILED(result))
{
return false;
}
instancesPtr = (InstanceVertex2*)data.pData;
for (int i = 0;i < m_vertices.size();i++)
{
instancesPtr[i].color = m_vertices[i].color;
instancesPtr[i].matrixInstance = m_vertices[i].matrixInstance;
instancesPtr[i].textureID = m_vertices[i].textureID;
instancesPtr[i].UVAdd = m_vertices[i].UVAdd;
instancesPtr[i].UVMultiply = m_vertices[i].UVMultiply;
}
//memcpy(instancesPtr, (void*)instances, sizeof(&m_vertices[0]));
//now un map
deviceContext->Unmap(m_instanceBuffer, 0);
我希望有一天这能帮助其他人解决这个问题，这确实花了我足够长的时间。
相关文章：
- 我的神经网络不起作用 [XOR 问题]
- 在C++程序中输入的文本文件将不起作用，除非文本被复制和粘贴
- C++映射:具有自定义类的运算符[]不起作用(总是返回0）
- C++为什么尽管我调用了void函数，它却不起作用
- 为什么在保护模式下继承升级不起作用
- 循环在计数器中不起作用
- 在其他文件中创建类时在 c++ 项目中不起作用
- Visual studio代码重构似乎不起作用(例如，重命名符号-f2）
- 为什么二进制搜索在我的测试中不起作用
- 我的代码中有错误吗?使用BGI图形的C++代码对我不起作用
- 为什么 const std：:p air<K，V>& 在 std：：map 上基于范围的 for 循环不起作用？
- 带有指定长度字符* 参数的 std：：regex_search 在 VS2017 中不起作用？
- Bjarne Stroustrup Book - std_lib_facilities.h - 不起作用(未知类型名称)
- 为什么简单的算术减法在"if"条件下不起作用？
- 为什么Stroustup书中的has_f不起作用
- 你能检查一下为什么在这个代码中从链接列表中删除项目不起作用吗
- 嵌套While循环不起作用(C++问题）
- C++Matching Brackets 2解决方案不起作用
- 为什么这段代码不起作用，我该如何解决?
- InstanceBuffer在DX 11_0中不起作用
