Method Draw

Source/Engine/Debug/DebugDraw.cpp:810–1015

}

void DebugDraw::Draw(RenderContext& renderContext, GPUTextureView* target, GPUTextureView* depthBuffer, bool enableDepthTest)
{
    PROFILE_GPU_CPU("Debug Draw");
    const RenderView& view = renderContext.View;
    SetView(view);

    // Ensure to have shader loaded and any lines to render
    const int32 debugDrawDepthTestCount = Context->DebugDrawDepthTest.Count();
    const int32 debugDrawDefaultCount = Context->DebugDrawDefault.Count();
    if (DebugDrawShader == nullptr || !DebugDrawShader->IsLoaded() || debugDrawDepthTestCount + debugDrawDefaultCount == 0 || DebugDrawPsWireTrianglesDepthTest.Depth == nullptr)
        return;
    if (renderContext.Buffers == nullptr || !DebugDrawVB)
        return;
    auto context = GPUDevice::Instance->GetMainContext();
    if (Context->Origin != view.Origin)
    {
        // Teleport existing debug shapes to maintain their location
        Float3 delta = Context->Origin - view.Origin;
        Context->DebugDrawDefault.Teleport(delta);
        Context->DebugDrawDepthTest.Teleport(delta);
        Context->Origin = view.Origin;
    }
    TaaJitterRemoveContext taaJitterRemove(view);

    // Fallback to task buffers
    if (target == nullptr && renderContext.Task)
        target = renderContext.Task->GetOutputView();

    // Fill vertex buffer and upload data
    DebugDrawCall depthTestLines, defaultLines, depthTestTriangles, defaultTriangles, depthTestWireTriangles, defaultWireTriangles;
    {
        PROFILE_CPU_NAMED("Update Buffer");
        DebugDrawVB->Clear();
        int32 vertexCounter = 0;
        depthTestLines = WriteLists(vertexCounter, Context->DebugDrawDepthTest.DefaultLines, Context->DebugDrawDepthTest.OneFrameLines);
        defaultLines = WriteLists(vertexCounter, Context->DebugDrawDefault.DefaultLines, Context->DebugDrawDefault.OneFrameLines);
        depthTestTriangles = WriteLists(vertexCounter, Context->DebugDrawDepthTest.DefaultTriangles, Context->DebugDrawDepthTest.OneFrameTriangles);
        defaultTriangles = WriteLists(vertexCounter, Context->DebugDrawDefault.DefaultTriangles, Context->DebugDrawDefault.OneFrameTriangles);
        depthTestWireTriangles = WriteLists(vertexCounter, Context->DebugDrawDepthTest.DefaultWireTriangles, Context->DebugDrawDepthTest.OneFrameWireTriangles);
        defaultWireTriangles = WriteLists(vertexCounter, Context->DebugDrawDefault.DefaultWireTriangles, Context->DebugDrawDefault.OneFrameWireTriangles);
        {
            PROFILE_CPU_NAMED("Flush");
            ZoneValue(DebugDrawVB->Data.Count() / 1024); // Size in kB
            DebugDrawVB->Flush(context);
        }
    }

    // Update constant buffer
    const auto cb = DebugDrawShader->GetShader()->GetCB(0);
    ShaderData data;
    Matrix vp;
    Matrix::Multiply(view.View, view.Projection, vp);
    Matrix::Transpose(vp, data.ViewProjection);
    data.ClipPosZBias = view.IsPerspectiveProjection() ? -0.2f : 0.0f; // Reduce Z-fighting artifacts (eg. editor grid)
    data.EnableDepthTest = enableDepthTest;
    context->UpdateCB(cb, &data);
    context->BindCB(0, cb);
    auto vb = DebugDrawVB->GetBuffer();