Method Render

Components/src/VectorFieldRenderer.cpp:173–223

}

void VectorFieldRenderer::Render(const RenderAttribs& Attribs)
{
    if (Attribs.pContext == nullptr)
    {
        UNEXPECTED("Context must not be null");
        return;
    }

    if (Attribs.GridSize.x == 0 || Attribs.GridSize.y == 0)
        return;

    if (Attribs.pVectorField == nullptr)
    {
        UNEXPECTED("Vector field must not be null");
        return;
    }

    auto* pPSO = GetPSO({Attribs.ConvertOutputToSRGB});
    if (pPSO == nullptr)
    {
        UNEXPECTED("Failed to get PSO");
        return;
    }

    if (pPSO->GetStatus() != PIPELINE_STATE_STATUS_READY)
        return;

    if (!m_SRB)
    {
        pPSO->CreateShaderResourceBinding(&m_SRB, true);
        m_SRB->GetVariableByName(SHADER_TYPE_VERTEX, "cbAttribs")->Set(m_RenderAttribsCB);
        m_pVectorFieldVar = m_SRB->GetVariableByName(SHADER_TYPE_VERTEX, "g_tex2DVectorField");
        VERIFY_EXPR(m_pVectorFieldVar != nullptr);
    }

    m_pVectorFieldVar->Set(Attribs.pVectorField);

    {
        MapHelper<HLSL::VectorFieldRenderAttribs> AttribsData{Attribs.pContext, m_RenderAttribsCB, MAP_WRITE, MAP_FLAG_DISCARD};
        AttribsData->ScaleAndBias = {Attribs.Scale, Attribs.Bias};
        AttribsData->f2GridSize   = {static_cast<float>(Attribs.GridSize.x), static_cast<float>(Attribs.GridSize.y)};
        AttribsData->u2GridSize   = {Attribs.GridSize.x, Attribs.GridSize.y};
        AttribsData->StartColor   = Attribs.StartColor;
        AttribsData->EndColor     = Attribs.EndColor;
    }

    Attribs.pContext->SetPipelineState(pPSO);
    Attribs.pContext->CommitShaderResources(m_SRB, RESOURCE_STATE_TRANSITION_MODE_VERIFY);
    DrawAttribs drawAttribs{Attribs.GridSize.x * Attribs.GridSize.y * 2, DRAW_FLAG_VERIFY_ALL};
    Attribs.pContext->Draw(drawAttribs);
}

} // namespace Diligent