DirectX 10三维场景随二维图形消失

Question

由于一些我无法理解的原因，当我打电话时，我的3D场景消失了。

this->sp->Begin(D3DX10_SPRITE_SORT_TEXTURE);

其中->sp为LPD3DX10SPRITE。

渲染我的2D场景。当我打电话时，我的3D场景也消失了。

RECT rc = {5, 5, 0, 0};
this->TR.Font->DrawText(
    NULL, 
    SS.str().c_str(), 
    -1, 
    &rc, 
    DT_NOCLIP, 
    D3DXCOLOR(0.0f, 1.0f, 0.0f, 1.0f));

其中->TR.Font是ID3DX10Font。

我是否应该在每个场景中使用一个ID3D10RenderTargetView，然后在我的绘图功能结束时进行组合？

如果它是帮助的话，这里是Draw()函数。

void Draw()
    {
        this->GDM.Clear(Color(100, 149, 237));

        this->GDM.Device->RSSetState(this->GDM.RasterizerState);
        this->GDM.Device->OMSetBlendState(this->GDM.BlendState, 0, 0xffffffff);
        this->GDM.EnableZBuffer(true);

        static float r;
        D3DXMATRIX w;

        D3DXMatrixIdentity(&w);
        //D3DXMatrixRotationY(&w, r);
        r += 0.01f * (3.14f / 180.0f);// * (float)Time->Scalar;


        this->effect.WorldMatrix->SetMatrix(w);
        this->effect.ViewMatrix->SetMatrix(viewMatrix);
        this->effect.ProjectionMatrix->SetMatrix(projectionMatrix);

        Vertex_PosCol * v = NULL;

        this->VertexBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**) &v);

        v[0] = Vertex_PosCol(D3DXVECTOR3(-1,-1,0), D3DXVECTOR4(1,0,0,1));
        v[1] = Vertex_PosCol(D3DXVECTOR3(0,1,0), D3DXVECTOR4(0,1,0,1));
        v[2] = Vertex_PosCol(D3DXVECTOR3(1,-1,0), D3DXVECTOR4(0,0,1,1));

        this->VertexBuffer->Unmap();

        this->GDM.Device->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
        //this->GDM.Device->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_LINESTRIP);

        D3D10_TECHNIQUE_DESC techDesc;
        this->effect.Technique->GetDesc( &techDesc );

        for (int p = 0; p < techDesc.Passes; p++)
        {
            this->effect.Technique->GetPassByIndex( p )->Apply( 0 );
            this->GDM.Device->Draw(3, 0);
        }

        this->GDM.EnableZBuffer(false);
        this->sBatch->Begin();

        if (loaded)
        {
            this->sBatch->Draw(
                s1,
                this->Input->Mouse.Position.x,
                this->Input->Mouse.Position.y,
                200,
                200,
                45.0f * (3.14f / 180.0f));
            this->sBatch->Draw(s2, x, y, 200, 200);
        }

        this->sBatch->End();

        SS << "Graphics Test And Development" << "\n";
        SS << "FPS: " << this->Time->FPS << "\n";
        SS << "X: " << x << "\n";
        SS << "Y: " << y << "\n";

        RECT rc = {5, 5, 0, 0};

        this->TR.RenderText(this->SS.str().c_str(), 5, 5, &Color(0.0f, 1.0f, 0.0f, 1.0f));

        this->SS.str("");
    }

Answer 1

正如上面的注释中所提到的，设置D3DX10_SPRITE_SAVE_STATE解决了使用3D绘制2D的问题。然而，这并没有阻止DrawText移除3D场景。几年前，我做了这个工作，所以我花了几个小时试图找到我的旧代码。遗憾的是，我做不到，但我确实设法找到了我当时遵循的教程。

以下是解决办法：

与其按照我的方式创建和丢弃每一个帧的顶点，不如：

this->VertexBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**) &v);

v[0] = Vertex_PosCol(D3DXVECTOR3(-1,-1,0), D3DXVECTOR4(1,0,0,1));
v[1] = Vertex_PosCol(D3DXVECTOR3(0,1,0), D3DXVECTOR4(0,1,0,1));
v[2] = Vertex_PosCol(D3DXVECTOR3(1,-1,0), D3DXVECTOR4(0,0,1,1));

this->VertexBuffer->Unmap();

我在Load()函数中创建了一个顶点和索引缓冲区：

    UINT VerticeCount = 3;
    ULONG IndexCount = 3;

    Vertex_PosCol * vertices = NULL;
    vertices = new Vertex_PosCol[VerticeCount];

    vertices[0].Position = D3DXVECTOR3(-1.0f, -1.0f, 0.0f);  // Bottom left.
    vertices[0].Color = D3DXVECTOR4(1.0f, 0.0f, 0.0f, 1.0f);

    vertices[1].Position = D3DXVECTOR3(0.0f, 1.0f, 0.0f);  // Top middle.
    vertices[1].Color = D3DXVECTOR4(0.0f, 1.0f, 0.0f, 1.0f);

    vertices[2].Position = D3DXVECTOR3(1.0f, -1.0f, 0.0f);  // Bottom right.
    vertices[2].Color = D3DXVECTOR4(0.0f, 0.0f, 1.0f, 1.0f);

    unsigned long * indices = new unsigned long[IndexCount];

    indices[0] = 0;  // Bottom left.
    indices[1] = 1;  // Top middle.
    indices[2] = 2;  // Bottom right.

    D3D10_BUFFER_DESC vbd;
    vbd.Usage = D3D10_USAGE_DEFAULT;
    vbd.ByteWidth = sizeof(Vertex_PosCol) * VerticeCount;
    vbd.BindFlags = D3D10_BIND_VERTEX_BUFFER;
    vbd.CPUAccessFlags = 0;
    vbd.MiscFlags = 0;

    D3D10_SUBRESOURCE_DATA vertexData;
    vertexData.pSysMem = vertices;

    HRESULT result = this->GDM.Device->CreateBuffer(&vbd, &vertexData, &VertexBuffer);

    UINT stride = sizeof( Vertex_PosCol );
    UINT offset = 0;

    if(FAILED(result))
    {
        bool b = false;
    }

    D3D10_BUFFER_DESC ibd;
    ibd.Usage = D3D10_USAGE_DEFAULT;
    ibd.ByteWidth = sizeof(unsigned long) * IndexCount;
    ibd.BindFlags = D3D10_BIND_INDEX_BUFFER;
    ibd.CPUAccessFlags = 0;
    ibd.MiscFlags = 0;

    D3D10_SUBRESOURCE_DATA indexData;
    indexData.pSysMem = indices;

    result = this->GDM.Device->CreateBuffer(&ibd, &indexData, &IndexBuffer);
    if(FAILED(result))
    {
        bool b = false;
    }

    delete [] vertices;
    delete [] indices;

然后，在()函数中，设置顶点和索引缓冲区、原始拓扑以及该特定缓冲区的输入布局。然后我画3D场景，然后画文字。下面是Draw()函数代码：

void Draw()
{
    this->GDM.Clear(Color(100, 149, 237));

    this->GDM.Device->RSSetState(this->GDM.RasterizerState);
    this->GDM.Device->OMSetBlendState(this->GDM.BlendState, 0, 0xffffffff);
    this->GDM.EnableZBuffer(true);

    static float r;
    D3DXMATRIX w;

    D3DXMatrixIdentity(&w);
    //D3DXMatrixRotationY(&w, r);
    r += 0.01f * (3.14f / 180.0f);// * (float)Time->Scalar;


    this->effect.WorldMatrix->SetMatrix(w);
    this->effect.ViewMatrix->SetMatrix(viewMatrix);
    this->effect.ProjectionMatrix->SetMatrix(projectionMatrix);


    UINT stride = sizeof(Vertex_PosCol);
    UINT offset = 0;

    this->GDM.Device->IASetVertexBuffers(0, 1, &this->VertexBuffer, &stride, &offset);
    this->GDM.Device->IASetIndexBuffer(this->IndexBuffer, DXGI_FORMAT_R32_UINT, 0);
    this->GDM.Device->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
    //this->GDM.Device->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_LINESTRIP);

    this->GDM.Device->IASetInputLayout(Vertex_PosCol::GetInputLayout());

    D3D10_TECHNIQUE_DESC techDesc;
    this->effect.Technique->GetDesc( &techDesc );

    for (int p = 0; p < techDesc.Passes; p++)
    {
        this->effect.Technique->GetPassByIndex( p )->Apply( 0 );
        this->GDM.Device->DrawIndexed(3,0,0);
    }

    this->GDM.EnableZBuffer(false);
    this->sBatch->Begin();

    if (loaded)
    {
        this->sBatch->Draw(
            s1,
            this->Input->Mouse.Position.x,
            this->Input->Mouse.Position.y,
            200,
            200,
            45.0f * (3.14f / 180.0f));
        this->sBatch->Draw(s2, x, y, 200, 200);
    }

    this->sBatch->End();

    SS << "Graphics Test And Development" << "\n";
    SS << "FPS: " << this->Time->FPS << "\n";
    SS << "X: " << x << "\n";
    SS << "Y: " << y << "\n";

    RECT rc = {5, 5, 0, 0};

    this->TR.RenderText(this->SS.str().c_str(), 5, 5, &Color(0.0f, 1.0f, 0.0f, 1.0f));

    this->SS.str("");
}

因为愚蠢的错误，我在这件事上花的时间比我应该花的时间长得多。当我创建缓冲区时，我为每个顶点和索引缓冲区创建了一个D3D10_SUBRESOURCE_DATA对象，但我忘记了设置它们，因此，我根本没有得到任何3D场景。

就我目前使用的3D场景渲染方法而言，据我所知，D3DX10_SPRITE_SAVE_STATE作为LPD3DX10SPRITE.Begin()中的标志是不必要的，但我将不管它如何保留它，除非它碰巧会带来任何性能问题，但我怀疑这种情况是否会发生。

无论如何，我确实意识到，一个简单的“嘿，我改变了这个，它的工作”可能已经足够作为一个答案，但我想要彻底。希望这能帮到别人！