Question

我对directx 11渲染有问题 - 如果我尝试渲染多个模型，我只看到奇数索引的模型。使用偶数索引呈现的所有模型都不可见。

我的代码基于rastertek教程：

m_dx->BeginScene(0.0f, 0.0f, 0.0f, 1.0f);
{
    m_camera->Render();

    XMMATRIX view;
    m_camera->GetViewMatrix(view);

    XMMATRIX world;
    m_dx->GetWorldMatrix(world);

    XMMATRIX projection;
    m_dx->GetProjectionMatrix(projection);

    XMMATRIX ortho;
    m_dx->GetOrthoMatrix(ortho);

    world = XMMatrixTranslation(-2, 0, -4);
    m_model->Render(m_dx->GetDeviceContext());
    m_texture_shader->Render(m_dx->GetDeviceContext(), m_model->GetIndicesCount(), world, view, projection,
        m_model->GetTexture());

    world = XMMatrixTranslation(2, 0, -2);
    m_model->Render(m_dx->GetDeviceContext());
    m_texture_shader->Render(m_dx->GetDeviceContext(), m_model->GetIndicesCount(), world, view, projection,
        m_model->GetTexture());

    world = XMMatrixTranslation(0, 0, -3);
    m_model->Render(m_dx->GetDeviceContext());
    m_texture_shader->Render(m_dx->GetDeviceContext(), m_model->GetIndicesCount(), world, view, projection,
        m_model->GetTexture());

}
m_dx->EndScene();

模型渲染方法

UINT stride, offset;

stride = sizeof(VertexPosTextureNormal);
offset = 0;

device_context->IASetVertexBuffers(0, 1, &m_vertex_buffer, &stride, &offset);
device_context->IASetIndexBuffer(m_index_buffer, DXGI_FORMAT_R32_UINT, 0);
device_context->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);

着色器渲染方法：

world = XMMatrixTranspose(world);
view = XMMatrixTranspose(view);
projection = XMMatrixTranspose(projection);

D3D11_MAPPED_SUBRESOURCE mapped_subres;
RETURN_FALSE_IF_FAILED(context->Map(m_matrix_buffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped_subres));
MatrixBuffer* data = (MatrixBuffer*)mapped_subres.pData;
data->world = world;
data->view = view;
data->projection = projection;
context->Unmap(m_matrix_buffer, 0);
context->VSSetConstantBuffers(0, 1, &m_matrix_buffer);
context->PSSetShaderResources(0, 1, &texture);

    // render
    context->IASetInputLayout(m_layout);

context->VSSetShader(m_vertex_shader, NULL, 0);
context->PSSetShader(m_pixel_shader, NULL, 0);
context->PSSetSamplers(0, 1, &m_sampler_state);
context->DrawIndexed(indices, 0, 0);

这可能是什么原因？

谢谢。

Answer 1

此代码 -

world = XMMatrixTranspose(world);
view = XMMatrixTranspose(view);
projection = XMMatrixTranspose(projection);

每次调用它时都会转置相同的矩阵，因此它们只有交替的正确值。每次在调用代码中都会重置世界矩阵，但视图和项目矩阵的交替时间是错误的。

具有偶数索引的DirectX 11模型未呈现

1 个答案: