我已经设置了一个directx引擎，一切看起来都不错，但它不会向我展示它需要绘制的对象，我无法找到问题所在。我用我的教程引擎搜索了代码，但它仍然无法工作。谁能在我的代码中看到问题？感谢您的帮助。 PS。不要担心头文件一切正常，只有这个文件没有。
#include "AppFramework.h"
struct Vertex
{
XMFLOAT3 Pos;
XMFLOAT4 Color;
};
struct CBUFFER{ XMMATRIX Final; };
class BoxApp : public Framework_App
{
public:
BoxApp(HINSTANCE hInstance);
~BoxApp();
bool Init();
void OnResize();
void UpdateScene(float dt);
void DrawScene();
void OnMouseDown(WPARAM btnState, int x, int y);
void OnMouseUp(WPARAM btnState, int x, int y);
void OnMouseMove(WPARAM btnState, int x, int y);
private:
void BuildGeometryBuffers();
void BuildFX();
private:
ID3D11Buffer* mBoxVB;
ID3D11Buffer* mBoxIB;
ID3D11Buffer* mBoxCB;
ID3D11VertexShader* pVS;
ID3D11PixelShader* pPS;
ID3D11InputLayout* mInputLayout;
XMFLOAT4X4 mWorld;
XMFLOAT4X4 mView;
XMFLOAT4X4 mProj;
float mTheta;
float mPhi;
float mRadius;
POINT mLastMousePos;
};
int WINAPI Main(HINSTANCE hInstance, HINSTANCE prevInstance,
PSTR cmdLine, int showCmd)
{
BoxApp theApp(hInstance);
if (!theApp.Init())
return 0;
return theApp.App_Run();
}
BoxApp::BoxApp(HINSTANCE hInstance)
: Framework_App(hInstance), mBoxVB(0), mBoxIB(0), pVS(0), pPS(0), mInputLayout(0),
mTheta(1.5f*MathTools::HalfTau), mPhi(0.25f*MathTools::HalfTau), mRadius(5.0f)
{
mLastMousePos.x = 0;
mLastMousePos.y = 0;
XMMATRIX I = XMMatrixIdentity();
XMStoreFloat4x4(&mWorld, I);
XMStoreFloat4x4(&mView, I);
XMStoreFloat4x4(&mProj, I);
}
BoxApp::~BoxApp()
{
ReleaseCOM(mBoxVB);
ReleaseCOM(mBoxIB);
ReleaseCOM(mBoxCB);
ReleaseCOM(pVS);
ReleaseCOM(pPS);
ReleaseCOM(mInputLayout);
}
bool BoxApp::Init()
{
if (!Framework_App::App_Init())
return false;
BuildGeometryBuffers();
BuildFX();
return true;
}
void BoxApp::OnResize()
{
Framework_App::OnResize();
XMMATRIX P = XMMatrixPerspectiveFovLH(0.25f*MathTools::HalfTau, AspectRatio(), 1.0f, 1000.0f);
XMStoreFloat4x4(&mProj, P);
}
void BoxApp::UpdateScene(float dt)
{
float x = mRadius*sinf(mPhi)*cosf(mTheta);
float z = mRadius*sinf(mPhi)*sinf(mTheta);
float y = mRadius*cosf(mPhi);
// Build the view matrix.
XMVECTOR pos = XMVectorSet(x, y, z, 1.0f);
XMVECTOR target = XMVectorZero();
XMVECTOR up = XMVectorSet(0.0f, 1.0f, 0.0f, 0.0f);
XMMATRIX V = XMMatrixLookAtLH(pos, target, up);
XMStoreFloat4x4(&mView, V);
}
void BoxApp::DrawScene()
{
MainDevContext->ClearRenderTargetView(mRenderTargetView, reinterpret_cast<const float*>(&Colors::LightSteelBlue));
MainDevContext->ClearDepthStencilView(mDepthStencilView, D3D11_CLEAR_DEPTH | D3D11_CLEAR_STENCIL, 1.0f, 0);
MainDevContext->IASetInputLayout(mInputLayout);
MainDevContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
UINT stride = sizeof(Vertex);
UINT offset = 0;
MainDevContext->IASetVertexBuffers(0, 1, &mBoxVB, &stride, &offset);
MainDevContext->IASetIndexBuffer(mBoxIB, DXGI_FORMAT_R32_UINT, 0);
XMMATRIX world = XMLoadFloat4x4(&mWorld);
XMMATRIX view = XMLoadFloat4x4(&mView);
XMMATRIX proj = XMLoadFloat4x4(&mProj);
XMMATRIX worldViewProj = world*view*proj;
CBUFFER cBuffer;
cBuffer.Final = worldViewProj;
MainDevContext->UpdateSubresource(mBoxCB, 0, 0, &cBuffer, 0, 0);
MainDevContext->DrawIndexed(36, 0, 0);
mSwapChain->Present(0, 0);
}
void BoxApp::OnMouseDown(WPARAM btnState, int x, int y)
{
mLastMousePos.x = x;
mLastMousePos.y = y;
SetCapture(FrmeWrkMainWnd);
}
void BoxApp::OnMouseUp(WPARAM btnState, int x, int y)
{
ReleaseCapture();
}
void BoxApp::OnMouseMove(WPARAM btnState, int x, int y)
{
if ((btnState & MK_LBUTTON) != 0)
{
// Make each pixel correspond to a quarter of a degree.
float dx = XMConvertToRadians(0.25f*static_cast<float>(x - mLastMousePos.x));
float dy = XMConvertToRadians(0.25f*static_cast<float>(y - mLastMousePos.y));
// Update angles based on input to orbit camera around box.
mTheta += dx;
mPhi += dy;
// Restrict the angle mPhi.
mPhi = MathTools::Clamp(mPhi, 0.1f, MathTools::HalfTau - 0.1f);
}
else if ((btnState & MK_RBUTTON) != 0)
{
// Make each pixel correspond to 0.005 unit in the scene.
float dx = 0.005f*static_cast<float>(x - mLastMousePos.x);
float dy = 0.005f*static_cast<float>(y - mLastMousePos.y);
// Update the camera radius based on input.
mRadius += dx - dy;
// Restrict the radius.
mRadius = MathTools::Clamp(mRadius, 3.0f, 15.0f);
}
mLastMousePos.x = x;
mLastMousePos.y = y;
}
void BoxApp::BuildGeometryBuffers()
{
// Create vertex buffer
Vertex vertices[] =
{
{ XMFLOAT3(-1.0f, -1.0f, -1.0f), (const float*)&Colors::White },
{ XMFLOAT3(-1.0f, +1.0f, -1.0f), (const float*)&Colors::Black },
{ XMFLOAT3(+1.0f, +1.0f, -1.0f), (const float*)&Colors::Red },
{ XMFLOAT3(+1.0f, -1.0f, -1.0f), (const float*)&Colors::Green },
{ XMFLOAT3(-1.0f, -1.0f, +1.0f), (const float*)&Colors::Blue },
{ XMFLOAT3(-1.0f, +1.0f, +1.0f), (const float*)&Colors::Yellow },
{ XMFLOAT3(+1.0f, +1.0f, +1.0f), (const float*)&Colors::Cyan },
{ XMFLOAT3(+1.0f, -1.0f, +1.0f), (const float*)&Colors::Magneta }
};
D3D11_BUFFER_DESC vbd;
vbd.Usage = D3D11_USAGE_IMMUTABLE;
vbd.ByteWidth = sizeof(Vertex)* 8;
vbd.BindFlags = D3D11_BIND_VERTEX_BUFFER;
vbd.CPUAccessFlags = 0;
vbd.MiscFlags = 0;
vbd.StructureByteStride = 0;
D3D11_SUBRESOURCE_DATA vinitData;
vinitData.pSysMem = vertices;
MainD3DDevice->CreateBuffer(&vbd, &vinitData, &mBoxVB);
// Create the index buffer
UINT indices[] = {
// front face
0, 1, 2,
0, 2, 3,
// back face
4, 6, 5,
4, 7, 6,
// left face
4, 5, 1,
4, 1, 0,
// right face
3, 2, 6,
3, 6, 7,
// top face
1, 5, 6,
1, 6, 2,
// bottom face
4, 0, 3,
4, 3, 7
};
D3D11_BUFFER_DESC ibd;
ibd.Usage = D3D11_USAGE_IMMUTABLE;
ibd.ByteWidth = sizeof(UINT)* 36;
ibd.BindFlags = D3D11_BIND_INDEX_BUFFER;
ibd.CPUAccessFlags = 0;
ibd.MiscFlags = 0;
ibd.StructureByteStride = 0;
D3D11_SUBRESOURCE_DATA iinitData;
iinitData.pSysMem = indices;
MainD3DDevice->CreateBuffer(&ibd, &iinitData, &mBoxIB);
}
void BoxApp::BuildFX()
{
ID3D10Blob* VS;
ID3D10Blob* PS;
D3DX11CompileFromFile((LPSTR)"mColor.shader",0,0, "VSshader", "vs_4_0", 0, 0, 0, &VS, 0, 0);
D3DX11CompileFromFile((LPSTR)"mColor.shader", 0, 0, "PSshader", "ps_4_0", 0, 0, 0, &PS, 0, 0);
MainD3DDevice->CreateVertexShader(VS->GetBufferPointer(), VS->GetBufferSize(), NULL, &pVS);
MainD3DDevice->CreatePixelShader(PS->GetBufferPointer(), PS->GetBufferSize(), NULL, &pPS);
MainDevContext->VSSetShader(pVS, 0, 0);
MainDevContext->PSSetShader(pPS, 0, 0);
D3D11_INPUT_ELEMENT_DESC vertexDesc[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 }
};
MainD3DDevice->CreateInputLayout(vertexDesc, 2, VS->GetBufferPointer(), VS->GetBufferSize() ,&mInputLayout);
MainDevContext->IASetInputLayout(mInputLayout);
D3D11_BUFFER_DESC bd;
ZeroMemory(&bd, sizeof(bd));
bd.Usage = D3D11_USAGE_DEFAULT;
bd.ByteWidth = 176;
bd.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
MainD3DDevice->CreateBuffer(&bd, NULL, &mBoxCB);
MainDevContext->VSSetConstantBuffers(0, 1, &mBoxCB);
}
答案 0 :(得分：0)
通过查看你的代码，你没有使用效果，即使代码让我想起了我的DX书，但没有效果部分（“使用DirectX 11进行3D游戏编程”）。
回到主题，因为你不使用效果，你必须转换你的wvp矩阵。效果会自动为您执行，因此您不必这样做。另外，为什么要将wvp矩阵存储在结构中？你不必，但如果你需要它......
对于bd.ByteWidth = 176;，您最好使用bd.ByteWidth = sizeof(XMFLOAT4X4)（仅当您只有1个float4x4矩阵时; D）。这样做的好处是总是给出准确的结果。
如果您还没有找到错误，请尝试此操作;）
希望我帮忙